Search

Your search keyword '"Umezaki, Noriyoshi"' showing total 41 results
Start Over Author "Umezaki, Noriyoshi"
41 results on '"Umezaki, Noriyoshi"'

8. Research on Time-course Differential Imaging by Bone Scintigraphy

Author

KAWAMURA, SEIJI, primary, FUKUSHIMA, SHIGEHIRO, additional, YOSHINAGA, YUKIYASU, additional, KAWATA, HIDEMICHI, additional, MIURA, HISAO, additional, MIYAGAWA, TERUO, additional, FUKUDOME, YOSHIFUMI, additional, UMEZAKI, NORIYOSHI, additional, ISHIBASHI, MASATOSHI, additional, MORITA, SEIICHIRO, additional, and HAYABUCHI, NAOFUMI, additional

Published
2005
Full Text
View/download PDF

9. An Attempt of Temporal Image Subtraction Technique on Bone Scintigraphy

Author

KAWAMURA, SEIJI, primary, FUKUSHIMA, SHGEHIRO, additional, YOSHINAGA, YUKIYASU, additional, KAWATA, HIDEMITI, additional, MIYAGAWA, TERUO, additional, FUKUDOME, YOSHIFUMI, additional, UMEZAKI, NORIYOSHI, additional, ISHIBASHI, MASATOSHI, additional, MORITA, SEIICHIRO, additional, and HAYABUCHI, NAOFUMI, additional

Published
2004
Full Text
View/download PDF

12. Assessment of Digital Radiography System for Chest Radiography with RbBr:Tl^+Photostimulable Storage Phosphors

Author

KAWATA, HIDEMICHI, primary, YAMAGATA, RUMI, additional, OOKURA, SUNAO, additional, IKEMATSU, RYUUJI, additional, OOKUBO, SEIJI, additional, KUROKI, HIDEFUMI, additional, TANIGAWA, HITOSHI, additional, KAWAMURA, SEIJI, additional, NAKASHIMA, NORITADA, additional, FUJIMOTO, KIMINORI, additional, UMEZAKI, NORIYOSHI, additional, and HAYABUCHI, NAOFUMI, additional

Published
2000
Full Text
View/download PDF

19. Validation of Single-Photon Emission Computed Tomography (SPECT) Using Thallium-201 in Patients with Lung Cancer.

Author

ISHIBASHI, MASATOSHI, primary, HONDA, NOBUSHIGE, additional, YOSHIOKA, FUMITAKA, additional, YOSHII, TOSHIAKI, additional, NOMURA, YASUSHI, additional, TAKAHASHI, KAZUYUKI, additional, NAGAYASU, OSAMU, additional, SATO, MITSUTAKA, additional, FUJIMOTO, KIMINORI, additional, UMEZAKI, NORIYOSHI, additional, and MORITA, SEIICHIRO, additional

Published
1991
Full Text
View/download PDF

22. Evaluation of the therapeutic effect of percutaneous nephroureterolithotomy by Tc-99m diethylenetiaminepentaacetic acid(DTPA) renal scintigraphy. Alteration of the renal fraction of blood flow, split-GFR, and renal mean transit time.

Author

ISHIBASHI, MASATOSHI, primary, MORITA, SEIICHIRO, additional, RABITO, CARLOS A., additional, UMEZAKI, NORIYOSHI, additional, MATSUOKA, KEI, additional, NODA, SHINSHI, additional, ETO, KOSAKU, additional, and OHTAKE, HISASHI, additional

Published
1990
Full Text
View/download PDF

24. Evaluation of portal circulation in rats by rectal administration of Tl followed by intrasplenic injection of Cr-labeled microspheres.

Author

Matsumoto, Shinichi, Fukuda, Kazumori, Morita, Seiichiro, Umezaki, Noriyoshi, Arakawa, Masahiro, Moriguchi, Yoshihiro, and Ohtake, Hisashi

Abstract

The heart-to-liver (H/L) uptake ratio in rats was determined 8 min after the rectal administration of Tl. Apart from normal controls, three groups of rats were examined; these were composed of animals with induced (1) acute hepatic damage, (2) liver cirrhosis, and (3) partial portal-vein ligation. After the rectal administration of Tl, Cr-labeled microspheres were injected into the spleen. The radioactivity of the removed liver, lungs, and heart was determined in a gamma-well scintillation counter, and the radioactivity of Tl and the Cr-labeled microspheres was separately calculated using simultaneous equations derived from the results of a preliminary experiment. The H/L ratios (Tl) in the normal controls and the animals with acute hepatic damage were not significantly different; however, there was a positive correlation ( P0.01) between the H/L ratio and the shunt index (Cr microspheres) in three groups, i.e., normal controls, liver cirrhosis, and partial portal-vein ligation. [ABSTRACT FROM AUTHOR]

Published
1985
Full Text
View/download PDF

25. RADIOISOTOPES

Author

MORITA, Seiichiro, primary, KIKUCHI, Shigeru, additional, NISHI, Fumiaki, additional, OKINAGA, Toshichika, additional, MORIGUCHI, Yoshihiro, additional, BUSSAKA, Yoshitaka, additional, UMEZAKI, Noriyoshi, additional, YANO, Kiyoshi, additional, OHTAKE, Hisashi, additional, KOJIRO, Masamichi, additional, and KAWASAKI, Hiroshi, additional

Published
1982
Full Text
View/download PDF

39. Evaluation of portal circulation in rats by rectal administration of 201Tl followed by intrasplenic injection of 51Cr-labeled microspheres

Author

Matsumoto, Shinichi, Fukuda, Kazumori, Morita, Seiichiro, Umezaki, Noriyoshi, Arakawa, Masahiro, Moriguchi, Yoshihiro, and Ohtake, Hisashi

Abstract

The heart-to-liver (H/L) uptake ratio in rats was determined 8 min after the rectal administration of 201Tl. Apart from normal controls, three groups of rats were examined; these were composed of animals with induced (1) acute hepatic damage, (2) liver cirrhosis, and (3) partial portal-vein ligation. After the rectal administration of 201Tl, 51Cr-labeled microspheres were injected into the spleen. The radioactivity of the removed liver, lungs, and heart was determined in a gamma-well scintillation counter, and the radioactivity of 201Tl and the 51Cr-labeled microspheres was separately calculated using simultaneous equations derived from the results of a preliminary experiment. The H/L ratios (201Tl) in the normal controls and the animals with acute hepatic damage were not significantly different; however, there was a positive correlation (P0.01) between the H/L ratio and the shunt index (51Cr microspheres) in three groups, i.e., normal controls, liver cirrhosis, and partial portal-vein ligation.

Published
1985
Full Text
View/download PDF

40. [Research on time-course differential imaging by bone scintigraphy].

Author

Kawamura S, Fukushima S, Yoshinaga Y, Kawata H, Miura H, Miyagawa T, Fukudome Y, Umezaki N, Ishibashi M, Morita S, and Hayabuchi N

Subjects
Humans, Radionuclide Imaging, Software, Subtraction Technique, Bone and Bones diagnostic imaging, Diagnosis, Computer-Assisted methods
Abstract

The temporal image subtraction technique was applied to bone scintigraphy, using Photoshop (commercially available image processing software) and Morpher (public domain warping software). For the temporal subtraction images, 81 subtraction images (19 cases) were prepared by a method used to subtract the previous images from the current ones. Registration of the current and previous images was performed by manual operation using Photoshop, and warping was done using the warping function of Morpher. In addition, difference images prepared after correcting the distributions of radioactive isotopes of the current and previous images using the count of the pelvic region were also examined. Compared with manual operation, alignment of images by warping improved registration and reduced the generation of pseudo-images of subtraction images. The rate of identification of abnormal accumulation-enhanced regions and subjective evaluation by doctors was improved for warping more than for manual operation. Furthermore, abnormal hot regions, which are difficult to find in film images, could be found in three subtraction images. In addition, it was confirmed that abnormal hot regions become more visible in many cases by preparing subtraction images after correcting the count between images using the count of the pelvic region. Thus, it is suggested that the temporal image subtraction technique in bone scintigraphy enables more accurate observation of enhancement of or changes in abnormal hot regions, which will support diagnostic reading. It is considered that enhancement of or changes in abnormal hot regions will be more accurately understood through further detailed discussion in the future.

Published
2005
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results