42 results on '"Sueoka, M."'
Search Results
2. Analysis of plasma equilibrium based on orbit-driven current density profile in steady-state plasma on QUEST
- Author
-
Nakamura, K., Alam, M.M., Jiang, Y.Z., Mitarai, O., Kurihara, K., Kawamata, Y., Sueoka, M., Takechi, M., Hasegawa, M., Tokunaga, K., Araki, K., Zushi, H., Hanada, K., Fujisawa, A., Idei, H., Nagashima, Y., Kawasaki, S., Nakashima, H., Higashijima, A., Nagata, T., and Fukuyama, A.
- Published
- 2016
- Full Text
- View/download PDF
3. Completion of JT-60SA construction and contribution to ITER
- Author
-
Kamada Y., Di Pietro E., Hanada M., Barabaschi P., Ide S., Davis S., Yoshida M., Giruzzi G., Sozzi C., Abdel Maksoud W., Abe H., Aiba N., Akiyama T., Ayllon-Guerola J., Arai T., Artaud J. -F., Asakura N., Ashikawa N., Balbinot L., Bando T., Baulaigue O., Belonohy E., Bin W., Bombarda F., Bolzonella T., Bonne F., Bonotto M., Botija J., Cabrera-Perez S., Cardella A., Carraro L., Cavalier J., Chernyshova M., Chiba S., Clement-Lorenzo S., Cocilovo V., Coda S., Coelho R., Coffey I., Collin B., Corato V., Cucchiaro A., Czarski T., Dairaku M., Day C., de la Luna E., De Tommasi G., Decool P., Di Pace L., Dibon M., Disset G., Ejiri A., Endo Y., Ezumi N., Falchetto G., Fassina A., Fejoz P., Ferro A., Fietz W., Figini L., Fornal T., Frello G., Fujita T., Fukuda T., Fukui K., Fukumoto M., Furukawa M., Futatani S., Gabellieri L., Gaio E., Galazka K., Garcia J., Garcia-Dominguez J., Garcia-Lopez J., Garcia-Munoz M., Garzotti L., Gasparini F., Gharafi S., Giacomelli L., Ginoulhiac G., Giudicotti L., Guillen Gonzalez R., Hajnal N., Hall S., Hamada K., Hanada K., Hasegawa K., Hatae T., Hatakeyama S., Hauer V., Hayashi N., Hayashi T., Heller R., Higashijima S., Hinata J., Hiranai S., Hiratsuka J., Hiwatari R., Hoa C., Homma H., Honda A., Honda M., Horiike H., Hoshino K., Hurzlmeier H., Iafrati M., Ibano K., Ichige H., Ichikawa M., Ichimura M., Ida K., Idei H., Iijima T., Iio S., Ikeda R., Ikeda Y., Imai T., Imazawa R., Inagaki S., Inomoto M., Inoue S., Isayama A., Ishida S., Ishii Y., Isobe M., Janky F., Joffrin E., Jokinen A., Kado S., Kajita S., Kajiwara K., Kamata I., Kaminaga A., Kamiya K., Kanapienyte D., Kashiwa Y., Kashiwagi M., Katayama K., Kawamata Y., Kawamura G., Kawano K., Kawashima H., Kin F., Kitajima S., Kiyono K., Kizu K., Kobayashi K., Kobayashi M., Kobayashi S., Kobayashi T., Kocsis G., Koide Yo., Koide Yu., Kojima A., Kokusen S., Komuro K., Konishi S., Kovacsik A., Ksiazek I., Kubkowska M., Kuhner G., Kuramochi M., Kurihara K., Kurki-Suonio T., Kurniawan A. B., Kuwata T., Lacroix B., Lamaison V., Lampasi A., Lang P., Lauber P., Lawson K., Louzguiti A., Maekawa R., Maekawa T., Maeyama S., Maffia G., Maget P., Mailloux J., Maione I., Maistrello A., Malinowski K., Marchiori G., Marechal J. -L., Massaut V., Masuzaki S., Matsunaga G., Matsunaga S., Mayri Ch., Mattei M., Medrano M., Mele A., Meyer I., Michel F., Minami T., Miyata Y., Miyazawa J., Miyo Y., Mizuuchi T., Mogaki K., Morales J., Moreau P., Mori M., Morisaki T., Morishima S., Moriyama S., Moro A., Murakami H., Murayama M., Murakami S., Nagasaki K., Naito O., Nakamura S., Nakano T., Nakashima Y., Nardino V., Narita E., Narushima Y., Natsume K., Nemoto S., Neu R., Nicollet S., Nishikawa M., Nishimura S., Nishiura M., Nishiyama T., Nocente M., Nobuta Y., Novello L., Nunio F., Ochoa S., Ogawa T., Ogawa Y., Ohdachi S., Ohmori Y., Ohno N., Ohtani Y., Ohzeki M., Oishi T., Okano F., Okano J., Okano K., Onishi Y., Osakabe M., Oshima T., Ostuni V., Oya M., Oya Y., Oyama N., Ozeki T., Pasqualotto R., Pelli S., Peretti E., Phillips G., Piccinni C., Pigatto L., Pironti A., Pizzuto A., Plockl B., Polli G., Poncet J. -M., Ponsot P., Puiatti M., Radloff D., Raimondi V., Ramos F., Rancsik P., Ricci D., Ricciarini S., Rincon E., Romano A., Rossi P., Roussel P., Rubino G., Saeki H., Sagara A., Sakakibara S., Sakamoto H., Sakamoto M., Sakamoto Y., Sakasai A., Sakata S., Sakuma T., Sakurai S., Salanon B., Salmi A., Sannazzaro G., Sano R., Sanpei A., Sasajima T., Sasaki S., Sasao H., Sato F., Sato M., Sawahata M., Scherber A., Scully S., Seki M., Seki S., Shibama Y., Shibata Y., Shikama T., Shimada K., Shimono M., Shinde J., Shinya T., Shinohara K., Shirai H., Shiraishi J., Soare S., Soleto A., Someya Y., Streciwilk-Kowalska E., Strobel H., Sueoka M., Sukegawa A., Sulistyanintyas D., Sumida S., Sunaoshi H., Suzuki H., Suzuki M., Suzuki S., Suzuki T., Suzuki Y., Svoboda J., Szabolics T., Szepesi T., Takahashi K., Takase Y., Takechi M., Takeda K., Takeiri Y., Takenaga H., Taliercio C., Tamura N., Tanaka H., Tanaka K., Tani K., Tanigawa H., Tardocchi M., Terakado A., Terakado M., Terakado T., Teuchner B., Tilia B., Tobita K., Toi K., Toida N., Tojo H., Tokitani M., Tokuzawa T., Tormarchio V., Tomine M., Torre A., Totsuka T., Tsuchiya K., Tsujii N., Tsuru D., Tsutsui H., Uchida M., Ueda Y., Uno J., Urano H., Usui K., Utoh H., Valisa M., Vallar M., Vallcorba-Carbonell R., Vallet J. -C., Varela J., Vega J., Verrecchia M., Vieillard L., Villone F., Vincenzi P., Wada K., Wada R., Wakatsuki T., Wanner M., Watanabe F., Watanabe K., Wauters T., Wiesen S., Wischmeier M., Yagi M., Yagyu J., Yajima M., Yokooka S., Yokoyama M., Yamamoto S., Yamanaka H., Yamauchi K., Yamauchi Y., Yamazaki H., Yamazaki K., Yamazaki R., Yamoto S., Yanagi S., Yanagihara K., Yoshizawa N., Zani L., Zito P., Kamada, Y., Di Pietro, E., Hanada, M., Barabaschi, P., Ide, S., Davis, S., Yoshida, M., Giruzzi, G., Sozzi, C., Abdel Maksoud, W., Abe, H., Aiba, N., Akiyama, T., Ayllon-Guerola, J., Arai, T., Artaud, J. -F., Asakura, N., Ashikawa, N., Balbinot, L., Bando, T., Baulaigue, O., Belonohy, E., Bin, W., Bombarda, F., Bolzonella, T., Bonne, F., Bonotto, M., Botija, J., Cabrera-Perez, S., Cardella, A., Carraro, L., Cavalier, J., Chernyshova, M., Chiba, S., Clement-Lorenzo, S., Cocilovo, V., Coda, S., Coelho, R., Coffey, I., Collin, B., Corato, V., Cucchiaro, A., Czarski, T., Dairaku, M., Day, C., de la Luna, E., De Tommasi, G., Decool, P., Di Pace, L., Dibon, M., Disset, G., Ejiri, A., Endo, Y., Ezumi, N., Falchetto, G., Fassina, A., Fejoz, P., Ferro, A., Fietz, W., Figini, L., Fornal, T., Frello, G., Fujita, T., Fukuda, T., Fukui, K., Fukumoto, M., Furukawa, M., Futatani, S., Gabellieri, L., Gaio, E., Galazka, K., Garcia, J., Garcia-Dominguez, J., Garcia-Lopez, J., Garcia-Munoz, M., Garzotti, L., Gasparini, F., Gharafi, S., Giacomelli, L., Ginoulhiac, G., Giudicotti, L., Guillen Gonzalez, R., Hajnal, N., Hall, S., Hamada, K., Hanada, K., Hasegawa, K., Hatae, T., Hatakeyama, S., Hauer, V., Hayashi, N., Hayashi, T., Heller, R., Higashijima, S., Hinata, J., Hiranai, S., Hiratsuka, J., Hiwatari, R., Hoa, C., Homma, H., Honda, A., Honda, M., Horiike, H., Hoshino, K., Hurzlmeier, H., Iafrati, M., Ibano, K., Ichige, H., Ichikawa, M., Ichimura, M., Ida, K., Idei, H., Iijima, T., Iio, S., Ikeda, R., Ikeda, Y., Imai, T., Imazawa, R., Inagaki, S., Inomoto, M., Inoue, S., Isayama, A., Ishida, S., Ishii, Y., Isobe, M., Janky, F., Joffrin, E., Jokinen, A., Kado, S., Kajita, S., Kajiwara, K., Kamata, I., Kaminaga, A., Kamiya, K., Kanapienyte, D., Kashiwa, Y., Kashiwagi, M., Katayama, K., Kawamata, Y., Kawamura, G., Kawano, K., Kawashima, H., Kin, F., Kitajima, S., Kiyono, K., Kizu, K., Kobayashi, K., Kobayashi, M., Kobayashi, S., Kobayashi, T., Kocsis, G., Koide, Yo., Koide, Yu., Kojima, A., Kokusen, S., Komuro, K., Konishi, S., Kovacsik, A., Ksiazek, I., Kubkowska, M., Kuhner, G., Kuramochi, M., Kurihara, K., Kurki-Suonio, T., Kurniawan, A. B., Kuwata, T., Lacroix, B., Lamaison, V., Lampasi, A., Lang, P., Lauber, P., Lawson, K., Louzguiti, A., Maekawa, R., Maekawa, T., Maeyama, S., Maffia, G., Maget, P., Mailloux, J., Maione, I., Maistrello, A., Malinowski, K., Marchiori, G., Marechal, J. -L., Massaut, V., Masuzaki, S., Matsunaga, G., Matsunaga, S., Mayri, Ch., Mattei, M., Medrano, M., Mele, A., Meyer, I., Michel, F., Minami, T., Miyata, Y., Miyazawa, J., Miyo, Y., Mizuuchi, T., Mogaki, K., Morales, J., Moreau, P., Mori, M., Morisaki, T., Morishima, S., Moriyama, S., Moro, A., Murakami, H., Murayama, M., Murakami, S., Nagasaki, K., Naito, O., Nakamura, S., Nakano, T., Nakashima, Y., Nardino, V., Narita, E., Narushima, Y., Natsume, K., Nemoto, S., Neu, R., Nicollet, S., Nishikawa, M., Nishimura, S., Nishiura, M., Nishiyama, T., Nocente, M., Nobuta, Y., Novello, L., Nunio, F., Ochoa, S., Ogawa, T., Ogawa, Y., Ohdachi, S., Ohmori, Y., Ohno, N., Ohtani, Y., Ohzeki, M., Oishi, T., Okano, F., Okano, J., Okano, K., Onishi, Y., Osakabe, M., Oshima, T., Ostuni, V., Oya, M., Oya, Y., Oyama, N., Ozeki, T., Pasqualotto, R., Pelli, S., Peretti, E., Phillips, G., Piccinni, C., Pigatto, L., Pironti, A., Pizzuto, A., Plockl, B., Polli, G., Poncet, J. -M., Ponsot, P., Puiatti, M., Radloff, D., Raimondi, V., Ramos, F., Rancsik, P., Ricci, D., Ricciarini, S., Rincon, E., Romano, A., Rossi, P., Roussel, P., Rubino, G., Saeki, H., Sagara, A., Sakakibara, S., Sakamoto, H., Sakamoto, M., Sakamoto, Y., Sakasai, A., Sakata, S., Sakuma, T., Sakurai, S., Salanon, B., Salmi, A., Sannazzaro, G., Sano, R., Sanpei, A., Sasajima, T., Sasaki, S., Sasao, H., Sato, F., Sato, M., Sawahata, M., Scherber, A., Scully, S., Seki, M., Seki, S., Shibama, Y., Shibata, Y., Shikama, T., Shimada, K., Shimono, M., Shinde, J., Shinya, T., Shinohara, K., Shirai, H., Shiraishi, J., Soare, S., Soleto, A., Someya, Y., Streciwilk-Kowalska, E., Strobel, H., Sueoka, M., Sukegawa, A., Sulistyanintyas, D., Sumida, S., Sunaoshi, H., Suzuki, H., Suzuki, M., Suzuki, S., Suzuki, T., Suzuki, Y., Svoboda, J., Szabolics, T., Szepesi, T., Takahashi, K., Takase, Y., Takechi, M., Takeda, K., Takeiri, Y., Takenaga, H., Taliercio, C., Tamura, N., Tanaka, H., Tanaka, K., Tani, K., Tanigawa, H., Tardocchi, M., Terakado, A., Terakado, M., Terakado, T., Teuchner, B., Tilia, B., Tobita, K., Toi, K., Toida, N., Tojo, H., Tokitani, M., Tokuzawa, T., Tormarchio, V., Tomine, M., Torre, A., Totsuka, T., Tsuchiya, K., Tsujii, N., Tsuru, D., Tsutsui, H., Uchida, M., Ueda, Y., Uno, J., Urano, H., Usui, K., Utoh, H., Valisa, M., Vallar, M., Vallcorba-Carbonell, R., Vallet, J. -C., Varela, J., Vega, J., Verrecchia, M., Vieillard, L., Villone, F., Vincenzi, P., Wada, K., Wada, R., Wakatsuki, T., Wanner, M., Watanabe, F., Watanabe, K., Wauters, T., Wiesen, S., Wischmeier, M., Yagi, M., Yagyu, J., Yajima, M., Yokooka, S., Yokoyama, M., Yamamoto, S., Yamanaka, H., Yamauchi, K., Yamauchi, Y., Yamazaki, H., Yamazaki, K., Yamazaki, R., Yamoto, S., Yanagi, S., Yanagihara, K., Yoshizawa, N., Zani, L., and Zito, P.
- Subjects
assembly ,Cryostat ,Nuclear and High Energy Physics ,Materials science ,Tokamak ,Nuclear engineering ,Plasma ,Condensed Matter Physics ,Field coil ,ITER risk mitigation ,Overcurrent ,law.invention ,Control theory ,law ,Electromagnetic coil ,research plan ,broader approach ,Voltage - Abstract
Construction of the JT-60SA tokamak was completed on schedule in March 2020. Manufacture and assembly of all the main tokamak components satisfied technical requirements, including dimensional accuracy and functional performances. Development of the plasma heating systems and diagnostics have also progressed, including the demonstration of the favourable electron cyclotron range of frequency (ECRF) transmission at multiple frequencies and the achievement of long sustainment of a high-energy intense negative ion beam. Development of all the tokamak operation control systems has been completed, together with an improved plasma equilibrium control scheme suitable for superconducting tokamaks including ITER. For preparation of the tokamak operation, plasma discharge scenarios have been established using this advanced equilibrium controller. Individual commissioning of the cryogenic system and the power supply system confirmed that these systems satisfy design requirements including operational schemes contributing directly to ITER, such as active control of heat load fluctuation of the cryoplant, which is essential for dynamic operation in superconducting tokamaks. The integrated commissioning (IC) is started by vacuum pumping of the vacuum vessel and cryostat, and then moved to cool-down of the tokamak and coil excitation tests. Transition to the super-conducting state was confirmed for all the TF, EF and CS coils. The TF coil current successfully reached 25.7 kA, which is the nominal operating current of the TF coil. For this nominal toroidal field of 2.25 T, ECRF was applied and an ECRF plasma was created. The IC was, however, suspended by an incident of over current of one of the superconducting equilibrium field coil and He leakage caused by insufficient voltage holding capability at a terminal joint of the coil. The unique importance of JT-60SA for H-mode and high-β steady-state plasma research has been confirmed using advanced integrated modellings. These experiences of assembly, IC and plasma operation of JT-60SA contribute to ITER risk mitigation and efficient implementation of ITER operation.
- Published
- 2022
4. Eddy current-adjusted plasma shape reconstruction by Cauchy condition surface method on QUEST
- Author
-
Nakamura, K., Jiang, Y., Liu, X.L., Mitarai, O., Kurihara, K., Kawamata, Y., Sueoka, M., Hasegawa, M., Tokunaga, K., Zushi, H., Hanada, K., Fujisawa, A., Sakamoto, M., Idei, H., Kawasaki, S., Nakashima, H., Higashijima, A., and Araki, K.
- Published
- 2011
- Full Text
- View/download PDF
5. Real-time measurement and feedback control of ion temperature profile and toroidal rotation using fast CXRS system in JT-60U
- Author
-
Yoshida, M., Sakamoto, Y., Sueoka, M., Kawamata, Y., Oyama, N., Suzuki, T., and Kamada, Y.
- Published
- 2009
- Full Text
- View/download PDF
6. Improvement of the real-time processor in JT-60 data processing system
- Author
-
Sakata, S., Kiyono, K., Sato, M., Kominato, T., Sueoka, M., Hosoyama, H., and Kawamata, Y.
- Published
- 2009
- Full Text
- View/download PDF
7. Design study of the JT-60SA supervisory control system
- Author
-
Kawamata, Y., Naito, O., Kiyono, K., Itami, K., Totsuka, T., Akasaka, H., Sueoka, M., Sato, T., Oshima, T., Sakata, S., Sato, M., Takenaga, H., Suzuki, T., Oyama, N., Takechi, M., Ozeki, T., Kamada, Y., and Kurihara, K.
- Published
- 2008
- Full Text
- View/download PDF
8. Burn control simulation experiments in JT-60U
- Author
-
Shimomura, K., Takenaga, H., Tsutsui, H., Mimata, H., Tsuji-Iio, S., Miura, Y., Tani, K., Kubo, H., Sakamoto, Y., Hiratsuka, H., Ichige, H., Sueoka, M., Kawamata, Y., Sakamoto, R., Kobayashi, S., and Shimada, R.
- Published
- 2007
- Full Text
- View/download PDF
9. Case study of huge squeezing behavior in expressway tunnel in service
- Author
-
Okui, Y, primary, Tsuruhara, T, additional, Ohta, H, additional, Tada, M, additional, Sakuma, S, additional, Nakata, C, additional, and Sueoka, M, additional
- Published
- 2011
- Full Text
- View/download PDF
10. Status and prospect of JT-60 plasma control and diagnostic data processing systems for advanced operation scenarios
- Author
-
Kurihara, K., Yonekawa, I., Kawamata, Y., Sueoka, M., Hosoyama, H., Sakata, S., Ohshima, T., Sato, M., Kiyono, K., and Ozeki., T.
- Published
- 2006
- Full Text
- View/download PDF
11. Advanced data handling for plasma profile control in JT-60
- Author
-
Yonekawa, I., Sueoka, M., Hosoyama, H., Kawamata, Y., Suzuki, T., and Kurihara, K.
- Published
- 2006
- Full Text
- View/download PDF
12. Current status and future prospects of the JT-60U control system
- Author
-
Yonekawa, I, Kawamata, Y, Totsuka, T, Akasaka, H, Sueoka, M, and Yoshida, H
- Published
- 2004
- Full Text
- View/download PDF
13. EP-1841 Couch modeling optimization for TomoTherapy planning and delivery
- Author
-
Tanooka, M., primary, Okada, W., additional, Sano, K., additional, Mayuri, S., additional, Doi, H., additional, Miyazaki, M., additional, Nakahara, R., additional, Sueoka, M., additional, Suzuki, H., additional, Fujiwara, M., additional, Kamikonya, N., additional, Inomata, Y., additional, and Yamakado, K., additional
- Published
- 2019
- Full Text
- View/download PDF
14. Development of a new discharge control system for JT-60 with a unix workstation and a VME-bus system
- Author
-
Totsuka, T., Akasaka, H., Sueoka, M., Takano, S., and Yonekawa, I.
- Published
- 2002
- Full Text
- View/download PDF
15. SU‐F‐T‐268: A Feasibility Study of Independent Dose Verification for Vero4DRT
- Author
-
Yamashita, M, primary, Takahashi, R, additional, Kokubo, M, additional, Takayama, K, additional, Tanabe, H, additional, Sueoka, M, additional, Ishii, M, additional, Okuuchi, N, additional, Iwamoto, Y, additional, and Tachibana, H, additional
- Published
- 2016
- Full Text
- View/download PDF
16. Shape Reconstruction of RF-Driven Divertor Plasma on QUEST
- Author
-
Nakamura, Kazuo, primary, Fujita, H., additional, Liu, X. L., additional, Xue, E. B., additional, Xia, Fan, additional, Mitarai, Osamu, additional, Kurihara, Kenichi, additional, Kawamata, Y., additional, Sueoka, M., additional, Hasegawa, Makoto, additional, Tokunaga, Kazutoshi, additional, Zushi, H., additional, Hanada, K., additional, Fujisawa, A., additional, Matsuoka, K., additional, Idei, H., additional, Nagashima, Y., additional, Kawasaki, S., additional, Nakashima, H., additional, Higashijima, A., additional, Araki, Kuniaki, additional, and Fukuyama, A., additional
- Published
- 2014
- Full Text
- View/download PDF
17. EP-1655: Development of hybrid dynamic tumor tracking irradiation using Vero4DRT: A preliminary study
- Author
-
Sueoka, M., primary, Sawada, A., additional, Ishihara, Y., additional, Yamada, M., additional, Tanabe, H., additional, Okada, Y., additional, Suzuki, Y., additional, Takayama, K., additional, Kokubo, M., additional, and Hiraoka, M., additional
- Published
- 2014
- Full Text
- View/download PDF
18. Shape reconstruction of RF-driven divertor plasma on QUEST
- Author
-
Nakamura, K., primary, Fujita, H., additional, Liu, X. L., additional, Xue, E. B., additional, Xia, F., additional, Mitarai, O., additional, Kurihara, K., additional, Kawamata, Y., additional, Sueoka, M., additional, Hasegawa, M., additional, Tokunaga, K., additional, Zushi, H., additional, Hanada, K., additional, Fujisawa, A., additional, Matsuoka, K., additional, Idei, H., additional, Nagashima, Y., additional, Kawasaki, S., additional, Nakashima, H., additional, Higashijima, A., additional, Araki, K., additional, and Fukuyama, A., additional
- Published
- 2013
- Full Text
- View/download PDF
19. EP-1291: Investigation of well-balanced kV x-ray imaging conditions between skin dose and image quality using Vero4DRT
- Author
-
Nakai, T., primary, Sawada, A., additional, Tanabe, H., additional, Sueoka, M., additional, Kubo, K., additional, Taniuchi, S., additional, Shiinoki, T., additional, Ishihara, Y., additional, Takayama, K., additional, and Kokubo, M., additional
- Published
- 2013
- Full Text
- View/download PDF
20. Evaluation of setup accuracy for Stereotactic Body Radiation Therapy in MHI-TM2000 System (Vero)
- Author
-
Tanabe, H., primary, Sawada, A., additional, Takayama, K., additional, Sueoka, M., additional, Kubo, K., additional, Itoh, T., additional, Nakai, T., additional, Furukawa, H., additional, Matsuo, Y., additional, and Kokubo, M., additional
- Published
- 2011
- Full Text
- View/download PDF
21. Development of PC-Based Control System in JT-60SA
- Author
-
Kawamata, Y., primary, Sugimura, T., additional, Yamaguchi, T., additional, Sueoka, M., additional, Sakata, S., additional, Totsuka, T., additional, Sato, M., additional, Kominato, T., additional, and Naito, O., additional
- Published
- 2011
- Full Text
- View/download PDF
22. SU-E-J-24: Measurement of Skin Dose toward Real-Time Tumor Tracking Irradiation in MHI-TM2000 (VERO): A Preliminary Study
- Author
-
Nakai, T, primary, Sawada, A, additional, Kaneko, S, additional, Tanabe, H, additional, Sueoka, M, additional, Kubo, K, additional, and Kokubo, M, additional
- Published
- 2011
- Full Text
- View/download PDF
23. Response of fusion gain to density in burning plasma simulation on JT-60U
- Author
-
Takenaga, H., primary, Kubo, H., additional, Sueoka, M., additional, Kawamata, Y., additional, Yoshida, M., additional, Kobayashi, S., additional, Sakamoto, Y., additional, Tsuji-Iio, S., additional, Shimomura, K., additional, Ichige, H., additional, Hiratsuka, H., additional, Sakamoto, R., additional, and Miura, Y., additional
- Published
- 2008
- Full Text
- View/download PDF
24. Plasma Shape Reconstruction of Spherical Tokamak using CCS Method
- Author
-
WANG, F., primary, NAKAMURA, K., additional, MITARAI, O., additional, KURIHARA, K., additional, KAWAMATA, Y., additional, SUEOKA, M., additional, SATO, K. N., additional, ZUSHI, H., additional, HANADA, K., additional, SAKAMOTO, M., additional, IDEI, H., additional, HASEGAWA, M., additional, KAWASAKI, S., additional, NAKASHIMA, H., additional, and HIGASHIJIMA, A., additional
- Published
- 2007
- Full Text
- View/download PDF
25. A basic study on a urea-selective catalytic reduction system for a medium-duty diesel engine
- Author
-
Kusaka, J, primary, Sueoka, M, additional, Takada, K, additional, Ohga, Y, additional, Nagasaki, T, additional, and Daisho, Y, additional
- Published
- 2005
- Full Text
- View/download PDF
26. Control of Current Profile and Instability by Radiofrequency Wave Injection in JT-60U and Its Applicability in JT-60SA.
- Author
-
Isayama, A., Suzuki, T., Hayashi, N., Ide, S., Hamamatsu, K., Fujita, T., Hosoyama, H., Kamada, Y., Nagasaki, K., Oyama, N., Ozeki, T., Sakata, S., Seki, M., Sueoka, M., Takechi, M., and Urano, H.
- Subjects
ELECTROOPTICS ,RADIO frequency ,STARK effect ,COMPUTER simulation ,AUTOMATIC control systems - Abstract
Recent results of control of current profile and instability using radiofrequency wave in JT-60U and prediction analysis in JT-60SA are descried. In JT-60U, control of current profile in high-beta regime was demonstrated by using a real-time system, where the motional Stark effect diagnostic and lower hybrid wave were used as a detector and actuator, respectively. The minimum value of the safety factor was raised from 1.3 to 1.7 so as to follow the commanded value. Complete stabilization of a neoclassical tearing mode (NTM) with the poloidal mode number m = 2 and the toroidal mode number n = 1 was demonstrated using electron cyclotron (EC) current drive. By scanning the location of EC current drive in detail, strong stabilization effect was found for misalignment less than about half of the full island width. In addition, destabilization of the 2/1 NTM was observed for misalignment comparable to the full island width. Simulation of NTM stabilization in JT-60SA was performed by using the TOPICS code combined with the modified Rutherford equation. The TOPICS simulation showed that complete stabilization can be achieved more effectively by optimizing the EC wave injection angle and modulating the EC wave. [ABSTRACT FROM AUTHOR]
- Published
- 2007
- Full Text
- View/download PDF
27. Recent RF Experiments and Application of RF Waves to Real-Time Control of Safety Factor Profile in JT-60U.
- Author
-
Suzuki, T., Isayama, A., Ide, S., Fujita, T., Oikawa, T., Sakata, S., Sueoka, M., Hosoyama, H., and Seki, M.
- Subjects
RADIO frequency ,REAL-time control ,SPECTRUM analysis ,STARK effect ,ELECTROMAGNETIC fields ,REFRACTIVE index - Abstract
Two topics of applications of RF waves to current profile control in JT-60U are presented; application of lower-hybrid (LH) waves to safety factor profile control and electron cyclotron (EC) waves to neo-classical tearing mode (NTM) control. A real-time control system of safety factor (q) profile was developed. This system, for the first time, enables 1) real time evaluation of q profile using local magnetic pitch angle measurement by motional Stark effect (MSE) diagnostic and 2) control of current drive (CD) location (ρCD) by controlling the parallel refractive index N∥ of LH waves through control of phase difference (Δ[lowercase_phi_synonym]) of LH waves between multi-junction launcher modules. The method for real-time q profile evaluation was newly developed, without time-consuming reconstruction of equilibrium, so that the method requires less computational time. Safety factor profile by the real-time calculation agrees well with that by equilibrium reconstruction with MSE. The control system controls ρCD through Δ[lowercase_phi_synonym] in such a way to decrease the largest residual between the real-time evaluated q profile q(r) and its reference profile qref(r). The real-time control system was applied to a positive shear plasma (q(0)∼1). The reference q profile was set to monotonic positive shear profile having qref(0)=1.3. The real-time q profile approached to the qref(r) during application of real-time control, and was sustained for 3s, which was limited by the duration of the injected LH power. Temporal evolution of current profile was consistent with relaxation of inductive electric field induced by theoretical LH driven current. An m/n=3/2 NTM that appeared at βN∼3 was completely stabilized by ECCD applied to a fully-developed NTM. Precise ECCD at NTM island was essential for the stabilization. ECCD that was applied to resonant rational surface (q=3/2) before an NTM onset suppressed appearance of NTM. In order to keep NTM intensity below a level, ECCD before the mode onset was more effective than that after mode saturation. © 2005 American Institute of Physics [ABSTRACT FROM AUTHOR]
- Published
- 2005
- Full Text
- View/download PDF
28. JT-60 Control System
- Author
-
Yonekawa, I., Kawamata, Y., Totsuka, T., Akasaka, H., Sueoka, M., Kurihara, K., and Kimura, T.
- Abstract
The present status of the JT-60U control system is reported including its original design concept, the progress of the system, and various modifications since the JT-60 upgrade. This control system has features of a functionally distributed and hierarchical structure, using CAMAC interfaces initially, which have been replaced by versatile module Europe (VME)-bus interfaces, and a protective interlock system composed of both software and hard-wired interlock logics. Plant monitoring and control are performed by efficient data communication through CAMAC highways and Ethernet with TCP/IP protocols. Sequential control of plasma discharges is executed by a combination of a remodeled VME-bus system and a timing system. A real-time plasma control system and a human interface system have been continuously modified corresponding to the progress of JT-60U experiments.
- Published
- 2002
- Full Text
- View/download PDF
29. Remodeling of JT-60 discharge control system
- Author
-
Yonekawa, I., Totsuka, T., Akasaka, H., Sueoka, M., Takano, S., and Kurihara, K.
- Published
- 2000
- Full Text
- View/download PDF
30. Rituximab-ameliorated Cutaneous Extravascular Necrotizing Granuloma.
- Author
-
Oka N, Yoshida Y, Sueoka M, and Hirata S
- Subjects
- Female, Humans, Middle Aged, Necrosis, Skin Diseases drug therapy, Skin Diseases pathology, Granuloma drug therapy, Granuloma pathology, Granuloma diagnostic imaging, Rituximab therapeutic use
- Published
- 2024
- Full Text
- View/download PDF
31. Two distinct Notch signals, Delta-like 4/Notch1 and Jagged-1/Notch2, antagonistically regulate chemical hepatocarcinogenesis in mice.
- Author
-
Nakano Y, Nakao S, Sueoka M, Kasahara D, Tanno Y, Sumiyoshi H, Itoh T, Miyajima A, Hozumi K, and Inagaki Y
- Subjects
- Animals, Carcinogenesis genetics, Carcinoma, Hepatocellular genetics, Carcinoma, Hepatocellular metabolism, Carcinoma, Hepatocellular pathology, Gene Expression Regulation, Genetic Predisposition to Disease, Jagged-1 Protein genetics, Liver Neoplasms pathology, Mice, Mice, Knockout, Receptor, Notch1 genetics, Receptor, Notch2 genetics, Adaptor Proteins, Signal Transducing metabolism, Calcium-Binding Proteins metabolism, Carcinogenesis metabolism, Jagged-1 Protein metabolism, Liver Neoplasms metabolism, Receptor, Notch1 metabolism, Receptor, Notch2 metabolism
- Abstract
Notch signaling is one of the most common drivers of carcinogenesis in many types of cancers, including hepatocellular carcinoma (HCC); however, it occasionally suppresses tumor progression. Moreover, it is virtually unknown how different sets of Notch ligands and receptors regulate the HCC development. In this study, we demonstrate that the expression of the Notch ligands, Delta-like 4 (Dll4) and Jagged-1 (Jag1), is upregulated during diethylnitrosamine-induced hepatocarcinogenesis. Dll4 is detected in the preneoplastic hepatocytes and HCC cells, but not in the normal hepatocytes, while Jag1 is expressed in the desmin-positive mesenchymal cells. Hepatocyte-specific Dll4 knockout abolishes the Notch1 signaling and suppresses the tumor progression. In contrast, Jag1 deletion induces the ectopic expression of Dll4 in hepatocytes along with the loss of Notch2 signaling, leading to the tumor progression. These results indicate that the two distinct Notch signals, Dll4/Notch1 and Jag1/Notch2, are antagonistic to each other, exerting opposite effects on HCC progression., (© 2022. The Author(s).)
- Published
- 2022
- Full Text
- View/download PDF
32. Three cases of advanced cutaneous squamous cell carcinoma treated with a combination of carboplatin and epirubicin.
- Author
-
Okamoto M, Kan T, Murakami E, Numata T, Otsuka R, Sueoka M, Moriwaki M, Takahagi S, Tanaka A, Kawai M, Mizuno H, and Hide M
- Subjects
- Aged, Carcinoma, Squamous Cell diagnosis, Female, Humans, Male, Middle Aged, Skin Neoplasms diagnosis, Antineoplastic Combined Chemotherapy Protocols administration & dosage, Carboplatin administration & dosage, Carcinoma, Squamous Cell drug therapy, Epirubicin administration & dosage, Skin Neoplasms drug therapy
- Abstract
Competing Interests: Competing interests: None declared.
- Published
- 2020
- Full Text
- View/download PDF
33. Oesophageal Cancer: Conformal Radiotherapy vs. Hybrid-VMAT Technique With Two Different Treatment Planning Systems.
- Author
-
Miyazaki M, Ohira S, Ueda Y, Isono M, Fujiwara M, Tanooka M, Okada W, Nakahara R, Sueoka M, Suzuki H, Teshima T, and Yamakado K
- Subjects
- Adult, Aged, Aged, 80 and over, Esophageal Neoplasms pathology, Esophageal Squamous Cell Carcinoma pathology, Female, Follow-Up Studies, Humans, Male, Middle Aged, Prognosis, Radiotherapy Dosage, Esophageal Neoplasms radiotherapy, Esophageal Squamous Cell Carcinoma radiotherapy, Organs at Risk radiation effects, Radiotherapy Planning, Computer-Assisted methods, Radiotherapy, Conformal methods, Radiotherapy, Intensity-Modulated methods
- Abstract
Background/aim: Traditionally, the radiotherapy of oesophageal cancer has been conformal radiotherapy (CRT). We sought to compare dosimetric parameters of conformal radiotherapy (CRT) with those of two treatment planning systems for hybrid-volumetric modulated arc therapy (h-VMAT) for the treatment of oesophageal cancer., Patients and Methods: In 11 patients, we compared: i) planning target volume coverage, ii) dose to organs at risk, and iii) the dose rate (DR) of the three techniques. We evaluated two treatment planning systems: i) Eclipse and ii) RayStation., Results: The Conformity Index of the CRT plan was significantly higher for the h-VMAT plans, compared to all other parameters. Normal lung tissue volumes receiving >5, 13, or 20 Gy were lower with the RayStation plan compared to Eclipse. The volume of cardiac tissue receiving >40 Gy was highest with the CRT plan. The minimum DR in VMAT was lowest for the RayStation plan (49.5 MU/min)., Conclusion: The h-VMAT plan using RayStation is the appropriate choice for reducing lung dose., (Copyright© 2020, International Institute of Anticancer Research (Dr. George J. Delinasios), All rights reserved.)
- Published
- 2020
- Full Text
- View/download PDF
34. Influence of Complications of Diabetes Mellitus on Exercise Tolerance of Patients with Heart Failure: Focusing on autonomic nervous activity and heart rate response during cardiopulmonary exercise tests.
- Author
-
Ishihara K, Morisawa T, Kawada J, Nagare Y, Koyama T, Yagi H, Sueoka M, Yoshida T, and Tamaki A
- Abstract
Purpose: The purpose of this study was to clarify the influence of complications of diabetes on the exercise tolerance of patients with heart failure., Methods: The subjects of this study were 69 patients (44 men; mean age: 62.2 ± 13.4 years) who were hospitalized and diagnosed with heart failure between November 2016 and November 2017. The subjects all took part in a cardiopulmonary exercise test. The patients' medical background, indexes obtained from lower-limb muscle strength and the cardiopulmonary exercise test, heart rate response indexes [Δ heart rate (ΔHR)], and autonomic nervous activities were measured, and these individual indexes were compared between the diabetic group and the non-diabetic group., Results: Compared with the non-diabetic group, the peak oxygen uptake (peak V̇O
2 ) and ΔHR in the diabetic group were significantly lower (13.0 ± 2.2 vs. 14.9 ± 4.4 ml/kg/min and 27.2 ± 11.7 vs. 36.7 ± 14.7 bpm, respectively) (p<0.05). Regarding the autonomic nervous activity during the cardiopulmonary exercise test in the diabetic group, there was a significant decrease of parasympathetic nerve activity and a significant lack of increase in sympathetic nerve activity (p<0.05)., Conclusions: Patients with heart failure and diabetes had lower levels of exercise tolerance, as compared with patients without complications. It was suggested that the decrease in heart rate response was due to the decrease of autonomic nervous activity and that this may play a role in reduced exercise tolerance., Competing Interests: There is no conflict of interest to disclose., (2019, JAPANESE PHYSICAL THERAPY ASSOCIATION.)- Published
- 2019
- Full Text
- View/download PDF
35. Couch modeling optimization for tomotherapy planning and delivery.
- Author
-
Okada W, Tanooka M, Sano K, Shibata M, Doi H, Miyazaki M, Nakahara R, Sueoka M, Suzuki H, Fujiwara M, Inomata T, and Yamakado K
- Subjects
- Algorithms, Carbon Fiber chemistry, Humans, Organs at Risk radiation effects, Radiotherapy Dosage, Radiotherapy Planning, Computer-Assisted methods, Radiotherapy, Intensity-Modulated methods, Models, Theoretical, Neoplasms radiotherapy, Patient Positioning, Quality Assurance, Health Care standards, Radiotherapy Planning, Computer-Assisted standards, Radiotherapy, Intensity-Modulated instrumentation
- Abstract
We sought to validate new couch modeling optimization for tomotherapy planning and delivery. We constructed simplified virtual structures just above a default setting couch through a planning support system (MIM Maestro, version 8.2, MIM Software Inc, Cleveland, OH, USA). Based on ionization chamber measurements, we performed interactive optimization and determined the most appropriate physical density of these virtual structures in a treatment planning system (TPS). To validate this couch optimization, Gamma analysis and these statistical analyses between a three-dimensional diode array QA system (ArcCHECK, Sun Nuclear, Melbourne, FL, USA) results and calculations from ionization chamber measurements were performed at 3%/2 mm criteria with a threshold of 10% in clinical QA plans. Using a virtual model consisting of a center slab density of 4.2 g/cm
3 and both side slabs density of 1.9 g/cm3 , we demonstrated close agreement between measured dose and the TPS calculated dose. Agreement was within 1% for all gantry angles at the isocenter and within 2% in off-axis plans. In validation of the couch modeling in a clinical QA plan, the average gamma passing rate improved approximately 0.6%-5.1%. It was statistically significant (P < 0.05) for all treatment sites. We successfully generated an accurate couch model for a TomoTherapy TPS by interactively optimizing the physical density of the couch using a planning support system. This modeling proved to be an efficient way of correcting the dosimetric effects of the treatment couch in tomotherapy planning and delivery., (© 2019 The Authors. Journal of Applied Clinical Medical Physics published by Wiley Periodicals, Inc. on behalf of American Association of Physicists in Medicine.)- Published
- 2019
- Full Text
- View/download PDF
36. A feasibility study of independent verification of dose calculation for Vero4DRT using a Clarkson-based algorithm.
- Author
-
Yamashita M, Takahashi R, Kokubo M, Takayama K, Tanabe H, Sueoka M, Ishii M, and Tachibana H
- Subjects
- Algorithms, Feasibility Studies, Humans, Lung Neoplasms radiotherapy, Male, Prostatic Neoplasms radiotherapy, Radiation Dosage, Radiotherapy instrumentation, Retrospective Studies, Radiotherapy methods
- Abstract
Dose verification for a gimbal-mounted image-guided radiotherapy system, Vero4DRT (Mitsubishi Heavy Industries Ltd., Tokyo, Japan) is usually carried out by pretreatment measurement. Independent verification calculations using Monte Carlo methods for Vero4DRT have been published. As the Clarkson method is faster and easier to use than measurement and Monte Carlo methods, we evaluated the accuracy of an independent calculation verification program and its feasibility as a secondary check for Vero4DRT. Computed tomography (CT)-based dose calculation was performed using a modified Clarkson-based algorithm. In this study, 120 patients' treatment plans were collected in our institute. The treatments were performed using conventional irradiation for lung and prostate, 3-dimensional (3D) conformal stereotactic body radiotherapy (SBRT) for the lung, and intensity-modulated radiation therapy (IMRT) for the prostate. Differences between the treatment planning system (TPS) and the Clarkson-based independent dose verification software were computed, and confidence limits (CLs, mean ± 2 standard deviation %) for Vero4DRT were compared with the CLs for the C-arms linear accelerators in the previous study. The results of the CLs, the conventional irradiation, SBRT, and IMRT showed 2.2 ± 3.5% (CL of the C-arms linear accelerators: 2.4 ± 5.3%), 1.1 ± 1.7% (-0.3 ± 2.0%), 4.8 ± 3.7% (5.4 ± 5.3%), and -0.5 ± 2.5% (-0.1 ± 3.6%) differences, respectively. The dose disagreement between the TPS and CT-based independent dose verification software was less than the 5% action level of American Association of Physicists in Medicine (AAPM) Task Group 114 (TG114). The CLs for the gimbal-mounted Vero4DRT were similar to the deviations for C-arms linear accelerators., (Copyright © 2017 American Association of Medical Dosimetrists. Published by Elsevier Inc. All rights reserved.)
- Published
- 2019
- Full Text
- View/download PDF
37. Development of hafnium metal and titanium-hafnium alloys having apatite-forming ability by chemical surface modification.
- Author
-
Miyazaki T, Sueoka M, Shirosaki Y, Shinozaki N, and Shiraishi T
- Subjects
- Humans, Materials Testing, Alloys chemistry, Apatites chemistry, Coated Materials, Biocompatible chemistry, Hafnium chemistry, Titanium chemistry
- Abstract
Hafnium (Hf) has attracted considerable attention as a component of biomedical titanium (Ti) alloys with low Young's moduli and/or shape-memory functionalities, because its cytotoxicity is as low as that of Ti. The drawback of metals is that their bone-bonding ability is generally low. It is known that apatite formation in the body is a prerequisite for bone-bonding. Although several chemical treatments have been proposed for preparing Ti for bone-bonding, there have been no similar investigations for Hf. In the present study, NaOH- and heat-treatments were applied to pure Hf and Ti-Hf alloys and their bone-bonding ability was assessed in vitro with the use of simulated body fluid (SBF). After NaOH- and heat-treatments, anatase formed on alloys with low Hf content (20-40% (atom%) Hf); mixtures of sodium titanate and hafnium titanate formed on alloys with similar Ti and Hf content (60% Hf); and hafnium oxide formed on alloys with high Hf content (80% Hf and pure Hf). Precipitates of apatite were observed on all the metals in SBF, except for the alloy with 60% Hf. We speculated that the hafnium titanate formed on this alloy had a low apatite-forming ability owing to its high negative surface charge, which inhibited P adsorption. The apatite-forming abilities of the Ti-Hf alloys strongly depended on their Hf content. The present results indicate that Hf-based materials have good potential for bone-bonding. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 2519-2523, 2018., (© 2017 Wiley Periodicals, Inc.)
- Published
- 2018
- Full Text
- View/download PDF
38. Identification of a novel alpha-fetoprotein-expressing cell population induced by the Jagged1/Notch2 signal in murine fibrotic liver.
- Author
-
Nakano Y, Nakao S, Sumiyoshi H, Mikami K, Tanno Y, Sueoka M, Kasahara D, Kimura H, Moro T, Kamiya A, Hozumi K, and Inagaki Y
- Abstract
The liver is well known to possess high regenerative capacity in response to partial resection or tissue injury. However, liver regeneration is often impaired in the case of advanced liver fibrosis/cirrhosis when mature hepatocytes can hardly self-proliferate. Hepatic progenitor cells have been implicated as a source of hepatocytes in regeneration of the fibrotic liver. Although alpha-fetoprotein (AFP) is known as a clinical marker of progenitor cell induction in injured/fibrotic adult liver, the origin and features of such AFP-producing cells are not fully understood. Here, we demonstrate a unique and distinct AFP-expressing cell population that is induced by the Jagged1/Notch2 signal in murine fibrotic liver. Following repeated carbon tetrachloride injections, a significant number of AFP-positive cells with high proliferative ability were observed along the fibrous septa depending on the extent of liver fibrosis. These AFP-positive cells exhibited features of immature hepatocytes that were stained positively for hepatocyte-lineage markers, such as albumin and hepatocyte nuclear factor 4 alpha, and a stem/progenitor cell marker Sox9. A combination of immunohistological examination of fibrotic liver tissues and coculture experiments with primary hepatocytes and hepatic stellate cells indicated that increased Jagged1 expression in activated hepatic stellate cells stimulated Notch2 signaling and up-regulated AFP expression in adjacent hepatocytes. The mobilization and proliferation of AFP-positive cells in fibrotic liver were further enhanced after partial hepatectomy, which was significantly suppressed in Jagged1-conditional knockout mice. Finally, forced expression of the intracellular domain of Notch2 in normal liver induced a small number of AFP-expressing hepatocytes in vivo. Conclusion : Insight is provided into a novel pathophysiological role of Jagged1/Notch2 signaling in the induction of AFP-positive cells in fibrotic liver through the interaction between hepatocytes and activated hepatic stellate cells. ( Hepatology Communications 2017;1:215-229).
- Published
- 2017
- Full Text
- View/download PDF
39. Dose reduction in cone-beam CT scanning for intracranial stent deployment before coil embolization of intracranial wide-neck aneurysms.
- Author
-
Kuriyama T, Sakai N, Niida N, Sueoka M, Beppu M, Dahmani C, Kojima I, Sakai C, Imamura H, Masago K, and Katakami N
- Subjects
- Adult, Aged, Aged, 80 and over, Cerebral Angiography, Contrast Media, Embolization, Therapeutic instrumentation, Female, Humans, Iopamidol, Male, Middle Aged, Radiation Dosage, Radiation Protection, Radiographic Image Interpretation, Computer-Assisted, Treatment Outcome, Cone-Beam Computed Tomography methods, Embolization, Therapeutic methods, Intracranial Aneurysm diagnostic imaging, Intracranial Aneurysm therapy, Radiography, Interventional methods, Stents
- Abstract
Purpose: Flat panel detector (FD)-equipped angiography machines are increasingly used for neuro-angiographic imaging. During intracranial stent-assisted coil embolization procedures, it is very important to clearly and quickly visualize stent shape after deployment in the vessel. It is necessary to quickly visualize stents by cone-beam computed tomography (CBCT). The aim of this study was to compare CBCTs at 10 and 20 s, and to confirm that this method is useful for neuro-endovascular treatment procedures., Materials and Methods: We treated 30 patients with wide-necked intracranial aneurysms with a flexible, self-expanding neurovascular stent and subsequent aneurysm embolization with platinum micro-coils. We performed the CBCT after stent deployment. We compared the 10 s and 20 s CBCTs, using the full width one-half maximum (FWHM) visualization., Results: Accurate stent placement with subsequent coil occlusion of the aneurysms was feasible in all patients. Stent struts were clearly visualized on both 10 s and 20 s CBCTs. Importantly, 10 s CBCT can reduce the radiation dose by about 42%, compared with 20 s CBCT. Performing 10 s CBCT with a 14% dilution of the contrast medium may significantly improve image acquisition during stent-assisted coil embolization., Conclusions: Reduced-dose, 10 s CBCT can visualize stents in clinical cases, while significantly reducing radiation exposure., (© The Author(s) 2016.)
- Published
- 2016
- Full Text
- View/download PDF
40. [Application of the grayscale standard display function to general purpose liquid-crystal display monitors for clinical use].
- Author
-
Tanaka N, Naka K, Sueoka M, Higashida Y, and Morishita J
- Subjects
- Humans, Liquid Crystals, Lung Neoplasms diagnostic imaging, User-Computer Interface, Computer Terminals standards, Radiographic Image Interpretation, Computer-Assisted instrumentation
- Abstract
Interpretations of medical images have been shifting to soft-copy readings with liquid-crystal display (LCD) monitors. The display function of the medical-grade LCD monitor for soft-copy readings is recommended to calibrate the grayscale standard display function (GSDF) in accordance with the guidelines of Japan and other countries. In this study, the luminance and display function of five models of eight general purpose LCD monitors were measured to gain an understanding of their characteristics. Moreover, the display function (gamma 2.2 or gamma 1.8) of general purpose LCD monitors was converted to GSDF through the use of a look-up table, and the detectability of a simulated lung nodule in the chest x-ray image was examined. As a result, the maximum luminance, contrast ratio, and luminance uniformity of general purpose LCD monitors, except for one model of two LCD monitors, met the management grade 1 standard in the guideline JESRA X-0093-2005. In addition, the detectability of simulated lung nodule in the mediastinal space was obviously improved by converting the display function of a general purpose LCD monitor into GSDF.
- Published
- 2010
- Full Text
- View/download PDF
41. Detectability of a lung nodule displayed on a liquid-crystal display monitor with different maximum luminance settings.
- Author
-
Takahashi K, Sueoka M, Yoon Y, Hiwasa T, Hatanaka S, Nakamura Y, Hashimoto N, Ohki M, and Morishita J
- Subjects
- Area Under Curve, Observer Variation, ROC Curve, Data Display, Light, Liquid Crystals, Lung Neoplasms diagnosis
- Abstract
Our purpose in this study was to examine the detectability of a lung nodule at different maximum luminance settings of a liquid-crystal display (LCD) monitor by utilizing receiver operating characteristic (ROC) analysis. The LCD monitor used in this study was calibrated to the grayscale standard display function with different maximum luminance settings (670, 450, and 170 cd/m(2)). The average area under the ROC curve (AUC) and the standard deviation for all observers at 670, 450, and 170 cd/m(2) were 0.837 +/- 0.076, 0.832 +/- 0.051, and 0.830 +/- 0.078, respectively. There was no statistically significant difference in AUC as a function of the maximum luminance setting of the LCD monitor. Considering the results, setting the maximum luminance of an LCD monitor at a higher level may not provide a significant advantage in the detectability of a lung nodule.
- Published
- 2010
- Full Text
- View/download PDF
42. Determination of flame-retardant hexabromocyclododecane diastereomers in textiles.
- Author
-
Kajiwara N, Sueoka M, Ohiwa T, and Takigami H
- Subjects
- Bromine analysis, Chemical Fractionation methods, Hot Temperature, Hydrocarbons, Brominated chemistry, Methylene Chloride, Stereoisomerism, Ultrasonics, Flame Retardants analysis, Hydrocarbons, Brominated analysis, Textiles analysis
- Abstract
To establish a concise and rapid procedure to analyze hexabromocyclododecane (HBCD) diastereomers in flame-retarded textiles, three different methods of extraction-Soxhlet, ultrasonic, and soaking extractions with toluene and dichloromethane (DCM)-were compared. During Soxhlet extraction using toluene, the percent contribution of alpha-HBCD to total HBCDs increased slightly and that of gamma-HBCD decreased, indicating that gamma-HBCD was isomerized to some extent at the boiling point of toluene (110.6 degrees C). For ultrasonic extraction, the temperature of the water bath can easily increase over time during the procedure, which might lead to undesirable effects. Therefore, we considered soaking extraction with DCM to be the most facile procedure to analyze HBCD diastereomers in textiles. Using the method established in this study, commercially available textiles in Japan (n=10) were analyzed to understand the actual composition of HBCD contents and its diastereomer profiles. With the exception of one textile sample, HBCDs were detected in all the samples analyzed, with concentrations ranging from 22000 to 43000 mg kg(-1) (i.e. 2.2-4.3%). We found a higher proportion of the alpha-diastereomer in most textile products compared with that of commercial HBCD mixtures, indicating that gamma-HBCD isomerized to alpha-diastereomer by heating processes to incorporate the commercial formulation into treated materials or that the alpha-diastereomer preferentially absorbed onto textile materials during the manufacturing of flame-retarded consumer products.
- Published
- 2009
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.