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1,059 results on '"Tanaka, Takehiro"'

7. 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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11. Cysts or necrotic components in pancreatic ductal adenocarcinoma is associated with the risk of EUS-FNA/B complications including needle tract seeding

Author

Terasawa, Hiroyuki, Matsumoto, Kazuyuki, Tanaka, Takehiro, Tomoda, Takeshi, Ogawa, Taiji, Ishihara, Yuki, Kikuchi, Tatsuya, Obata, Taisuke, Oda, Takashi, Matsumi, Akihiro, Miyamoto, Kazuya, Morimoto, Kosaku, Fujii, Yuki, Yamazaki, Tatsuhiro, Uchida, Daisuke, Horiguchi, Shigeru, Tsutsumi, Koichiro, Kato, Hironari, and Otsuka, Motoyuki

Published
2023
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19. Environmental effects on growth performance of Pacific oyster Crassostrea gigas cultured in the Seto Inland Sea, Japan, from 1990 to 2021.

Author

Pang, Yumeng, Ono, Tsuneo, and Tanaka, Takehiro

Subjects
PACIFIC oysters, OYSTER culture, OYSTERS, WATER temperature, SURVIVAL rate
Abstract

The Pacific oyster (Crassostrea gigas) has been cultured for its flesh in the Seto Inland Sea, western Japan, over the last half‐century. Its production has been reported as 'fluctuating', yet little is known about changes in oyster growth performance throughout long‐term culturing in this locality. To effectively manage oyster production under future environmental challenges, this study investigated the long‐term environmental influences on oyster growth performance. Environmental data and oyster biological data were obtained from observations in Hinase waters, Seto Inland Sea, and compared for the two periods 1990 and 2015–2021. Water temperature has not significantly changed in this locality during the oyster culturing period. Lower salinity was found in July of 2015–2021 due to heavy seasonal rainfall, which had a negative impact on oysters, specifically on survival rate and total weight. A high growth rate and high meat weight at harvest were found in the individuals cultured during the period 2015–2021, yet oyster total weight showed no significant difference. Further research on shell characteristics is required to have a better understanding of oyster growth characteristics. [ABSTRACT FROM AUTHOR]

Published
2024
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27. Recent updates on treatment options for primary follicular lymphoma of the gastrointestinal tract.

Author

Iwamuro, Masaya, Tanaka, Takehiro, Ennishi, Daisuke, and Otsuka, Motoyuki

Subjects
FOLLICULAR lymphoma, BOWEL obstructions, GASTROINTESTINAL system, INTESTINAL tumors, LYMPHOMAS
Abstract

Background: Primary gastrointestinal follicular lymphoma is a subtype of follicular lymphoma that originates directly from the gastrointestinal tract. Pathologically, it exhibits substantial similarities with the secondary gastrointestinal involvement observed in nodal follicular lymphoma. However, primary gastrointestinal follicular lymphoma presents clinically distinct features, necessitating divergent considerations in treatment selection compared with nodal follicular lymphoma. Areas covered: This narrative review focused on recent articles (2018–2023) regarding the long-term prognosis and treatment options for gastrointestinal follicular lymphoma. In addition, a brief overview of gastrointestinal follicular lymphomas is provided. Expert opinion: Patients with primary gastrointestinal follicular lymphoma often present with a low tumor burden. Lymphoma lesions typically remain asymptomatic for several years or may undergo spontaneous regression without immediate treatment. Therefore, a 'watch and wait' approach is justified. Conversely, when large tumor masses are identified in the gastrointestinal tract, the potential for tumor bleeding or intestinal obstruction requires timely therapeutic interventions. [ABSTRACT FROM AUTHOR]

Published
2024
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28. 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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40. 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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41. 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

44. 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

45. 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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49. 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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50. 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

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