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6. Does Video Compression Impact Tracking Accuracy?

Author

Tanaka, Takehiro, Harell, Alon, and Bajić, Ivan V.

Subjects
Computer Science - Computer Vision and Pattern Recognition, Electrical Engineering and Systems Science - Image and Video Processing
Abstract

Everyone "knows" that compressing a video will degrade the accuracy of object tracking. Yet, a literature search on this topic reveals that there is very little documented evidence for this presumed fact. Part of the reason is that, until recently, there were no object tracking datasets for uncompressed video, which made studying the effects of compression on tracking accuracy difficult. In this paper, using a recently published dataset that contains tracking annotations for uncompressed videos, we examined the degradation of tracking accuracy due to video compression using rigorous statistical methods. Specifically, we examined the impact of quantization parameter (QP) and motion search range (MSR) on Multiple Object Tracking Accuracy (MOTA). The results show that QP impacts MOTA at the 95% confidence level, while there is insufficient evidence to claim that MSR impacts MOTA. Moreover, regression analysis allows us to derive a quantitative relationship between MOTA and QP for the specific tracker used in the experiments., Comment: 5 pages, 6 figures, 3 tables, IEEE International Symposium on Circuits and Systems (ISCAS) 2022

Published
2022

8. SFU-HW-Tracks-v1: Object Tracking Dataset on Raw Video Sequences

Author

Tanaka, Takehiro, Choi, Hyomin, and Bajić, Ivan V.

Subjects
Computer Science - Computer Vision and Pattern Recognition, Electrical Engineering and Systems Science - Image and Video Processing
Abstract

We present a dataset that contains object annotations with unique object identities (IDs) for the High Efficiency Video Coding (HEVC) v1 Common Test Conditions (CTC) sequences. Ground-truth annotations for 13 sequences were prepared and released as the dataset called SFU-HW-Tracks-v1. For each video frame, ground truth annotations include object class ID, object ID, and bounding box location and its dimensions. The dataset can be used to evaluate object tracking performance on uncompressed video sequences and study the relationship between video compression and object tracking., Comment: 4 pages, 3 figures, submitted to Data in Brief

Published
2021

10. Long-term outcomes of patients with primary intestinal follicular lymphoma managed with watch-and-wait strategy

Author

Iwamuro, Masaya, Tanaka, Takehiro, Ennishi, Daisuke, Matsueda, Kazuhiro, Yoshioka, Masao, Miyahara, Koji, Sakaguchi, Chihiro, Nishimura, Mamoru, Nagahara, Teruya, Mannami, Tomohiko, Takenaka, Ryuta, Oka, Shohei, Inoue, Masafumi, Takimoto, Hidetaka, Inaba, Tomoki, Kobayashi, Sayo, Toyokawa, Tatsuya, Tsugeno, Hirofumi, Suzuki, Seiyuu, Sawada, Sachiko, Tanaka, Shouichi, Tsuzuki, Takao, and Okada, Hiroyuki

Published
2023
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17. Endoscopic and Histological Gastritis in University Students with Helicobacter pylori Infection

Author

Okanoue, Shotaro, primary, Sakae, Hiroyuki, additional, Yokota, Kenji, additional, Tanaka, Takehiro, additional, Obayashi, Yuka, additional, Abe, Makoto, additional, Kono, Yoshiyasu, additional, Kanzaki, Hiromitsu, additional, Iwamuro, Masaya, additional, Kawano, Seiji, additional, Kawahara, Yoshiro, additional, Yanai, Hiroyuki, additional, and Okada, Hiroyuki, additional

Published
2024
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20. 2570. The intraoperative pharmacokinetics of ampicillin and sulbactam and the effect of massive bleeding in recipients of living donor liver transplantation

Author

Wakimoto, Yuji, primary, Okamoto, Koh, additional, Yamamoto, Takehito, additional, Akamatsu, Nobuhisa, additional, Kariya, Taro, additional, Hoshino, Yoko, additional, Harada, Sohei, additional, Hashimoto, Hideki, additional, Jubishi, Daisuke, additional, Yamaguchi, Ryo, additional, Tanaka, Takehiro, additional, Kaneko, Junichi, additional, Okugawa, Shu, additional, Uchida, Kanji, additional, Takada, Tappei, additional, Hasegawa, Kiyoshi, additional, and Tsutsumi, Takeya, additional

Published
2023
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28. Lesion size, elevated morphology, and non or closed-type atrophy are predictive factors for gastric adenocarcinoma of the fundic gland type rather than oxyntic gland adenoma

Author

Iwamuro, Masaya, Kusumoto, Chiaki, Nakagawa, Masahiro, Matsueda, Kazuhiro, Kobayashi, Sayo, Yoshioka, Masao, Inaba, Tomoki, Toyokawa, Tatsuya, Sakaguchi, Chihiro, Tanaka, Shouichi, Tanaka, Takehiro, and Okada, Hiroyuki

Subjects
oxyntic gland adenoma, Gastric adenocarcinoma of the fundic gland type (GA-FG), Oncology, gastric neoplasms, submucosal invasion, Gastroenterology
Abstract

Background: An oxyntic gland neoplasm confined to the mucosal layer (T1a) is classified as an oxyntic gland adenoma, whereas that with submucosal invasion (T1b) is defined as gastric adenocarcinoma of the fundic gland type (GA-FG). Methods: To reveal the differences in clinical features between them, we retrospectively investigated 136 patients with 150 oxyntic gland adenoma and GA-FG lesions. Results: The univariate analysis revealed that the mean size (GA-FG vs. oxyntic gland adenoma, 7.7±5.4 vs. 5.5±3.1 mm), the prevalence of elevated morphology (79.1% vs. 51.8%), black pigmentation within the lesion (23.9% vs. 9.6%), and non or closed-type atrophy (81.2% vs. 65.1%) were different between the two groups. A multivariate logistic regression analysis revealed that ≥5 mm lesion size (odds ratio, 2.96; 95% confidence interval: 1.21–7.23), elevated morphology (odds ratio, 2.40; 95% confidence interval: 1.06–5.45), and no or closed-type atrophy (odds ratio, 2.49; 95% confidence interval: 1.07–5.80) were factors in distinguishing GA-FG from oxyntic gland adenoma. When oxyntic gland neoplasms with no or one feature were judged as oxyntic gland adenomas and those with two or three features were judged as GA-FG, the sensitivity and specificity were 85.1% and 43.4% for GA-FG, respectively. Conclusions: We identified three possible distinctive features of GA-FG compared to oxyntic gland adenoma: lesion size ≥5 mm, elevated morphology, and no or closed-type atrophy.

Published
2023

29. Scattered Tiny Whitish Protrusions in the Stomach Are a Clue to the Diagnosis of Autoimmune Gastritis

Author

Iwamuro, Masaya, Tanaka, Takehiro, Hamada, Kenta, Kono, Yoshiyasu, Kanzaki, Hiromitsu, Kawano, Seiji, Kawahara, Yoshiro, and Okada, Hiroyuki

Subjects
small white protrusions, mucosal lesions, esophagogastroduodenoscopy, scattered lesions, autoimmune gastritis
Abstract

Herein, we report two patients with autoimmune gastritis who had undergone multiple esophagogastroduodenoscopy procedures for 17 and 9 years, respectively, before their diagnosis. Instead, they had been diagnosed with and treated for Helicobacter pylori-associated gastritis. The correct diagnosis was made when scatterings of tiny whitish protrusions in the gastric mucosa were detected on esophagogastroduodenoscopy. Our findings suggest that scattered tiny whitish bumps may be a clue to the diagnosis of autoimmune gastritis.

Published
2023

30. Liquid biopsy for patients with IBD-associated neoplasia

Author

Kinugasa, Hideaki, Hiraoka, Sakiko, Nouso, Kazuhiro, Yamamoto, Shumpei, Hirai, Mami, Terasawa, Hiroyuki, Yasutomi, Eriko, Oka, Shohei, Ohmori, Masayasu, Yamasaki, Yasushi, Inokuchi, Toshihiro, Takahara, Masahiro, Harada, Keita, Tanaka, Takehiro, and Okada, Hiroyuki

Published
2020
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34. Short-term variation in pH in seawaters around coastal areas of Japan: characteristics and forcings.

Author

Ono, Tsuneo, Muraoka, Daisuke, Hayashi, Masahiro, Yorifuji, Makiko, Dazai, Akihiro, Omoto, Shigeyuki, Tanaka, Takehiro, Okamura, Tomohiro, Onitsuka, Goh, Sudo, Kenji, Fujii, Masahiko, Hamanoue, Ryuji, and Wakita, Masahide

Subjects
CLIMATE change, ARCHIPELAGOES
Abstract

The pH of coastal seawater varies based on several local forcings, such as water circulation, terrestrial inputs, and biological processes, and these forcings are changing along with global climate change. Understanding the mechanism of pH variation in each coastal area is thus important for a realistic future projection that considers changes in these forcings. From 2020 to 2021, we performed parallel year-round observations of pH and related ocean parameters at five stations around the Japanese coast (Miyako Bay, Shizugawa Bay, Kashiwazaki Coast, Hinase Archipelago, and Ohno Strait) to understand the characteristics of short-term pH variations and their forcings. Annual variability (∼ 1 standard deviation) of pH and aragonite saturation state (Ωar) were 0.05–0.09 and 0.25–0.29, respectively, for three areas with low anthropogenic pressures (Miyako Bay, Kashiwazaki Coast, and Shizugawa Bay), while it increased to 0.16–0.21 and 0.52–0.58, respectively, in two areas with medium anthropogenic pressures (Hinase Archipelago and Ohno Strait in Seto Inland Sea). Statistical assessment of temporal variability at various timescales revealed that most of the annual variabilities in both pH and Ωar were derived by short-term variation at a timescale of <10 d, rather than seasonal-scale variation. Our analyses further illustrated that most of the short-term pH variation was caused by biological processes, while both thermodynamic and biological processes equally contributed to the temporal variation in Ωar. The observed results showed that short-term acidification with Ωar < 1.5 occurred occasionally in Miyako and Shizugawa bays, while it occurred frequently in the Hinase Archipelago and Ohno Strait. Most of such short-term acidified events were related to short-term low-salinity events. Our analyses showed that the amplitude of short-term pH variation was linearly correlated with that of short-term salinity variation, and its regression coefficient at the time of high freshwater input was positively correlated with the nutrient concentration of the main river that flows into the coastal area. [ABSTRACT FROM AUTHOR]

Published
2024
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35. Assessing impacts of coastal warming, acidification, and deoxygenation on Pacific oyster (Crassostrea gigas) farming: a case study in the Hinase area, Okayama Prefecture, and Shizugawa Bay, Miyagi Prefecture, Japan.

Author

Fujii, Masahiko, Hamanoue, Ryuji, Bernardo, Lawrence Patrick Cases, Ono, Tsuneo, Dazai, Akihiro, Oomoto, Shigeyuki, Wakita, Masahide, and Tanaka, Takehiro

Subjects
PACIFIC oysters, CRASSOSTREA, ACIDIFICATION, DEOXYGENATION, AGRICULTURE, OYSTER culture, CARBON dioxide
Abstract

Coastal warming, acidification, and deoxygenation are progressing primarily due to the increase in anthropogenic CO 2. Coastal acidification has been reported to have effects that are anticipated to become more severe as acidification progresses, including inhibiting the formation of shells of calcifying organisms such as shellfish, which include Pacific oysters (Crassostrea gigas), one of the most important aquaculture resources in Japan. Moreover, there is concern regarding the combined impacts of coastal warming, acidification, and deoxygenation on Pacific oysters. However, spatiotemporal variations in acidification and deoxygenation indicators such as pH, the aragonite saturation state (Ωarag), and dissolved oxygen have not been observed and projected in oceanic Pacific oyster farms in Japan. To assess the present impacts and project future impacts of coastal warming, acidification, and deoxygenation on Pacific oysters, we performed continuous in situ monitoring, numerical modeling, and microscopic examination of Pacific oyster larvae in the Hinase area of Okayama Prefecture and Shizugawa Bay in Miyagi Prefecture, Japan, both of which are famous for their Pacific oyster farms. Our monitoring results first found Ωarag values lower than the critical level of acidification for Pacific oyster larvae in Hinase, although no impact of acidification on larvae was identified by microscopic examination. Our modeling results suggest that Pacific oyster larvae are anticipated to be affected more seriously by the combined impacts of coastal warming and acidification, with lower pH and Ωarag values and a prolonged spawning period, which may shorten the oyster shipping period and lower the quality of oysters. [ABSTRACT FROM AUTHOR]

Published
2023
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36. Bilateral Lacrimal Gland Mantle Cell Lymphoma in 11-Year Follow-Up: Case Report and Review of 48 Cases With Ocular Adnexal Presentation in the Literature

Author

Matsuo, Toshihiko, Tanaka, Takehiro, Okada, Kazuya, Notohara, Kenji, Fujii, Keiko, and Fujii, Nobuharu

Subjects
breast cancer, tracheal and bronchial infiltration, mantle cell lymphoma, autologous peripheral blood stem cell transplantation, lacrimal gland
Abstract

A 63-year-old woman, with 11-year history of breast cancer, showed bilateral lacrimal gland enlargement on magnetic resonance imaging. Gallium-67 scintigraphy, as the standard at that time in 2004, demonstrated abnormally high uptake only in bilateral lacrimal glands. The lacrimal glands were extirpated and the pathological diagnosis was mantle cell lymphoma (MCL). She underwent bilateral orbital radiation, based on no uptake of gallium-67 in other sites of the body. In a month, bone marrow biopsy revealed the infiltration with MCL, positive for cyclin D1. She showed hepatic lymphadenopathy and splenomegaly, and so received 2 cycles of alternating Hyper-CVAD therapy and high-dose methotrexate with cytarabine, combined with rituximab, in 2 months, leading to complete remission. She underwent autologous peripheral blood stem cell transplantation and was well until the age of 68 years when she showed a recurrent intratracheal submucosal lesion of lymphoma and underwent one course of reduced-dose CHOP combined with rituximab. Next year, the left rib resection revealed the metastasis of breast adenocarcinoma, leading to daily oral letrozole. Further 2 years later, computed tomographic scan demonstrated multiple submucosal nodular lesions in the trachea and bronchi, together with cervical and supraclavicular lymphadenopathy, and intratracheal lesion biopsy and bone marrow biopsy proved the involvement with MCL. She underwent 2 courses of bendamustine and rituximab, resulting in complete remission but died of metastatic breast cancer at the age of 74 years. Clinical features in 48 previous cases with ocular adnexal MCL in the literature were summarized in this study.

Published
2023

40. Impact of cancer-associated fibroblasts on survival of patients with ampullary carcinoma

Author

Takagi, Kosei, Noma, Kazuhiro, Nagai, Yasuo, Kikuchi, Satoru, Umeda, Yuzo, Yoshida, Ryuichi, Fuji, Tomokazu, Yasui, Kazuya, Tanaka, Takehiro, Kashima, Hajime, Yagi, Takahito, Fujiwara, Toshiyoshi, Takagi, Kosei, Noma, Kazuhiro, Nagai, Yasuo, Kikuchi, Satoru, Umeda, Yuzo, Yoshida, Ryuichi, Fuji, Tomokazu, Yasui, Kazuya, Tanaka, Takehiro, Kashima, Hajime, Yagi, Takahito, and Fujiwara, Toshiyoshi

Abstract

Background: Cancer-associated fibroblasts (CAFs) reportedly enhance the progression of gastrointestinal surgery; however, the role of CAFs in ampullary carcinomas remains poorly examined. This study aimed to investigate the effect of CAFs on the survival of patients with ampullary carcinoma. Materials and methods: A retrospective analysis of 67 patients who underwent pancreatoduodenectomy between January 2000 and December 2021 was performed. CAFs were defined as spindle-shaped cells that expressed alpha-smooth muscle actin (alpha-SMA) and fibroblast activation protein (FAP). The impact of CAFs on survival, including recurrence-free (RFS) and disease-specific survival (DSS), as well as prognostic factors associated with survival, was analyzed. Results: The high-alpha-SMA group had significantly worse 5-year RFS (47.6% vs. 82.2%, p = 0.003) and 5-year DSS (67.5% vs. 93.3%, p = 0.01) than the low-alpha-SMA group. RFS (p = 0.04) and DSS (p = 0.02) in the high-FAP group were significantly worse than those in the low-FAP group. Multivariable analyses found that high alpha-SMA expression was an independent predictor of RFS [hazard ratio (HR): 3.68; 95% confidence intervals (CI): 1.21-12.4; p = 0.02] and DSS (HR: 8.54; 95% CI: 1.21-170; p = 0.03). Conclusions: CAFs, particularly alpha-SMA, can be useful predictors of survival in patients undergoing radical resection for ampullary carcinomas.

Published
2023

41. Collagenous Colitis in a Patient With Gastric Cancer Who Underwent Chemotherapy

Author

Iwamuro, Masaya, Tanaka, Takehiro, Kagawa, Shunsuke, Inoo, Shoko, Otsuka, Motoyuki, Iwamuro, Masaya, Tanaka, Takehiro, Kagawa, Shunsuke, Inoo, Shoko, and Otsuka, Motoyuki

Abstract

Herein, we present a case of collagenous colitis in a patient who underwent chemotherapy for gastric cancer, comprising five cycles of S-1 plus oxaliplatin and trastuzumab, followed by five cycles of paclitaxel and ramucirumab and seven cycles of nivolumab. The subsequent initiation of trastuzumab deruxtecan chemotherapy led to the development of grade 3 diarrhea after the second cycle of treatment. Collagenous colitis was diagnosed via colonoscopy and biopsy. The patient's diarrhea improved following the cessation of lansoprazole. This case highlights the importance of considering collagenous colitis as a differential diagnosis, in addition to chemotherapy-induced colitis and immune-related adverse event (irAE) colitis, in patients with similar clinical presentations.

Published
2023

42. Review of lymphoma in the duodenum: An update of diagnosis and management

Author

Iwamuro, Masaya, Tanaka, Takehiro, Okada, Hiroyuki, Iwamuro, Masaya, Tanaka, Takehiro, and Okada, Hiroyuki

Abstract

The presentation, subtype, and macroscopic images of lymphoma vary depending on the site of the tumor within the gastrointestinal tract. We searched PubMed for publications between January 1, 2012 and October 10, 2022, and retrieved 130 articles relating to duodenal lymphoma. A further 22 articles were added based on the manual screening of relevant articles, yielding 152 articles for full-text review. The most predominant primary duodenal lymphoma was follicular lymphoma. In this review, we provide an update of the diagnosis and man-agement of representative lymphoma subtypes occurring in the duodenum: Follicular lymphoma, diffuse large B-cell lymphoma, extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue, mantle cell lymphoma, and T-cell lymphomas.

Published
2023

43. Resection of Orbital Myxoma With Magnetic Resonance Imaging Evidence of Ethmoid Sinus Origin: Case Report and Review of 20 Patients in the Literature

Author

Matsuo, Toshihiko, Tanaka, Takehiro, Matsuo, Toshihiko, and Tanaka, Takehiro

Abstract

A 41-year-old woman showed a palpable mass at the superonasal orbital edge on the right side. Magnetic resonance imaging demonstrated a lobulated fluid-containing tubular mass which extended anteriorly to posteriorly along the medial orbital wall, nasal to the eyeball. She was followed once a year for 8 years until the age of 49 years when she decided to undergo surgical resection because of the enlarged mass. The lobulated large mass was resected and the pathology showed sparsely distributed spindle cells, positive for CD34, in alcian blue-positive mucous substances, indicative of myxoma. Postoperative magnetic resonance imaging showed residual lobulated tubular mass along the optic nerve on the medial side and superior to the eyeball. The residual orbital mass showed stable structure with more evident connection with the ethmoid sinus lesion, suggestive of the ethmoid origin, in 12 years until the age of 61 years. In the review of 20 patients with orbital myxomas in the literature, in addition to this case, roughly classified locations in the orbit were retrobulbar in 8 patients, on the lateral side of the orbit in 4, on the superior side in 6, on the medial side in 1 (this patient), and in the orbit with no specific description in 2. In pathological examinations, immunohistochemistry was not done in 8 patients, done but all negative in 2, and positive in 11 patients: nerve sheath myxoma was diagnosed in 3 patients based on positive S100 staining. Orbital myxoma is rare but considered in differential diagnosis of orbital masses.

Published
2023

45. Clinicopathological Characteristics of Superficial Barrett's Adenocarcinoma in a Japanese Population: A Retrospective, Multicenter Study

Author

Hamada, Kenta, Kanzaki, Hiromitsu, Miyahara, Koji, Nakagawa, Masahiro, Mouri, Hirokazu, Mizuno, Motowo, Takahashi, Sakuma, Hori, Shinichiro, Nasu, Junichiro, Tsuzuki, Takao, Miyaike, Jiro, Takenaka, Ryuta, Yamauchi, Kenji, Kobayashi, Sayo, Toyokawa, Tatsuya, Inoue, Masafumi, Nishimura, Mamoru, Matsubara, Minoru, Tomoda, Jun, Yamasaki, Yasushi, Tanaka, Takehiro, Shirakawa, Yasuhiro, Kawahara, Yoshiro, Fujiwara, Toshiyoshi, Okada, Hiroyuki, and Okayama Gut Study Group

Subjects
Barrett's adenocarcinoma, lesion, surgery, Barrett Esophagus, endoscopic resection, Esophageal Neoplasms, Japan, short -segment Barrett's esophagus, metachronous, Humans, Adenocarcinoma, Retrospective Studies, long -segment Barrett's esophagus
Abstract

Objective Although Barrett's adenocarcinoma (BA) remains a minor disease in Japan, its incidence has been gradually increasing. We analyzed the characteristics of BA in Japanese populations. Methods We retrospectively reviewed medical records and analyzed the clinicopathological differences between short-segment Barrett's esophagus (SSBE) and long-segment Barrett's esophagus (LSBE), as well as metastasis. Local recurrence and metachronous lesions were analyzed only in patients who underwent endoscopic resection (ER). Patients Consecutive patients who had pathological T1 BAs resected by ER or surgery from January 2003 Results A total of 168 patients were analyzed, including 139 with SSBE and 29 with LSBE. In total, 67% of the SSBE lesions and 32% of the LSBE lesions were located between 0 and 3 o'clock (p=0.0014). No patients who achieved pathological margin-free resection (pR0) and 17% of patients who did not achieve pR0 experienced local recurrence (p=0.0131). None of the patients without lymphovascular involvement, a poorly differentiated component, lesion size of >30 mm, and submucosal invasion of >500 mu m experienced metastasis. The 5-year cumulative incidence rate of metachronous BA after ER was 0% in patients with SSBE and 40% in patients with LSBE (p=0.0005). Conclusion Superficial BA was likely to be detected at the right anterior wall of SSBE in the Japanese population. The risk for metachronous BA after ER was high in Japanese patients with LSBE, as in Western patients.

Published
2022

49. A Long-Term Survival Case of Coronary Artery Intimal Sarcoma

Author

Nakashima, Mitsutaka, primary, Nakamura, Kazufumi, additional, Tabata, Masahiro, additional, Masuda, Zenichi, additional, Tanaka, Takehiro, additional, Yoshida, Masatoki, additional, Maeda, Yoshinobu, additional, Kasahara, Shingo, additional, and Ito, Hiroshi, additional

Published
2023
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