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Nabeshima K, Asakura S, Iwata R, Honjo H, Haga A, Goka K, Onuma M. Sequencing methods for HA and NA genes of avian influenza viruses from wild bird feces using Oxford Nanopore sequencing. Comp Immunol Microbiol Infect Dis 2023; 102:102076. [PMID: 37804607 DOI: 10.1016/j.cimid.2023.102076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 09/28/2023] [Accepted: 10/02/2023] [Indexed: 10/09/2023]
Abstract
We developed a method to determine the sequences of hemagglutinin (HA) and neuraminidase (NA) from RNA extracted directly from wild bird fecal samples, using Nanopore Flongle. We determined the nucleotide sequences and subtypes of HA and NA in 16 and 15 samples respectively, using Flongle. The results of HA and NA subtyping determined by the conventional method were consistent with their subtypes determined by our method, thereby the applicability of this method in the identification of HA and NA subtypes. In addition, the homology between the HA fragments in this and the Sanger methods ranged from 98.5 % to 100 %. Compared with conventional PCR with the Sanger method, this method can easily determine HA and NA subtypes and sequences directly from the fecal samples. It is easier to implement and has lower running costs (USD100$) than other NGS-based methods, making it a useful tool for avian influenza surveillance in wild birds.
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Affiliation(s)
- Kei Nabeshima
- Biodiversity Division, Ecological Risk Assessment and Control Section, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan
| | - Shingo Asakura
- Biodiversity Division, Ecological Risk Assessment and Control Section, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan; Animal Research Center of Hokkaido Research Organization, 5-39 Shintoku, Hokkaido, 081-0038, Japan
| | - Ritsuko Iwata
- Biodiversity Division, Ecological Risk Assessment and Control Section, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan
| | - Hisako Honjo
- Biodiversity Division, Ecological Risk Assessment and Control Section, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan
| | - Atsushi Haga
- Biodiversity Division, Ecological Risk Assessment and Control Section, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan
| | - Koichi Goka
- Biodiversity Division, Ecological Risk Assessment and Control Section, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan
| | - Manabu Onuma
- Biodiversity Division, Ecological Risk Assessment and Control Section, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan.
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Nagata J, Haga A, Kusachi Y, Tokuyoshi M, Endo H, Watari Y. Cats were Responsible for the Headless Carcasses of Shearwaters: Evidence from Genetic Predator Identification. Mammal Study 2022. [DOI: 10.3106/ms2021-0047] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Junco Nagata
- Forestry and Forest Products Research Institute, 1 Matsunosato, Tsukuba, Ibaraki 305-8687, Japan
| | - Atsushi Haga
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | | | - Mikuni Tokuyoshi
- Graduate School of Agriculture and Life Science, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Hideki Endo
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yuya Watari
- Forestry and Forest Products Research Institute, 1 Matsunosato, Tsukuba, Ibaraki 305-8687, Japan
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3
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Ozaki S, Kaji S, Nawa K, Imae T, Aoki A, Nakamoto T, Ohta T, Nozawa Y, Haga A, Nakagawa K. PD-0755 Training modality conversion models with small data and its application to MVCT to kVCT conversion. Radiother Oncol 2021. [DOI: 10.1016/s0167-8140(21)07034-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Ishii C, Ikenaka Y, Nakayama SMM, Kuritani T, Nakagawa M, Saito K, Watanabe Y, Ogasawara K, Onuma M, Haga A, Ishizuka M. Current situation regarding lead exposure in birds in Japan (2015-2018); lead exposure is still occurring. J Vet Med Sci 2020; 82:1118-1123. [PMID: 32554936 PMCID: PMC7468064 DOI: 10.1292/jvms.20-0104] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Birds of a number of species have died as a result of lead (Pb) poisoning, including many Steller's sea eagles (Haliaeetus pelagicus) and white-tailed sea eagles (Haliaeetus albicilla) in Hokkaido, the northernmost island of Japan. To address this issue, the use of any type of Pb ammunition for hunting of large animals was prohibited in Hokkaido in 2004. However, Pb poisoning is still being reported in this area, and there are few regulations regarding the use of Pb ammunition in other parts of Japan, where it has been reported that eagles and water birds have been exposed to Pb. This study was performed to accurately determine the current level of Pb exposure of birds found dead in the field or dead in the wild bird centers in Japan (June 2015-May 2018) and to identify the sources of Pb. Pb exposure was found to still be occurring in raptors and water birds in various parts of Japan. Twenty-six point five % and 5.9% of the recorded deaths of Steller's sea eagles and white-tailed sea eagles, respectively, were found to have been poisoned by Pb. In addition, Pb isotope ratio analysis showed that both Pb rifle bullets and Pb shot pellets cause Pb exposure in birds, and these endangered eagles are also exposed to Pb in Hokkaido due to the illegal use of Pb ammunition. Changing to Pb-free ammunition, such as copper (Cu) rifle bullets, steel shot pellets, or bismuth shot pellets, will be essential for the conservation of avian species in Japan.
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Affiliation(s)
- Chihiro Ishii
- Laboratory of Toxicology, Department of Environmental Veterinary Sciences, School of Veterinary Medicine, Hokkaido University, Kita18, Nishi9, Kita-ku, Sapporo, Hokkaido 060-0818, Japan
| | - Yoshinori Ikenaka
- Laboratory of Toxicology, Department of Environmental Veterinary Sciences, School of Veterinary Medicine, Hokkaido University, Kita18, Nishi9, Kita-ku, Sapporo, Hokkaido 060-0818, Japan.,Water Research Group, Unit for Environmental Sciences and Management, North-West University, 11 Hoffman Street, Potchefstroom, 2531, South Africa
| | - Shouta M M Nakayama
- Laboratory of Toxicology, Department of Environmental Veterinary Sciences, School of Veterinary Medicine, Hokkaido University, Kita18, Nishi9, Kita-ku, Sapporo, Hokkaido 060-0818, Japan
| | - Takeshi Kuritani
- Graduate School of Science, Hokkaido University, Kita10, Nishi8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Mitsuhiro Nakagawa
- Graduate School of Science, Hokkaido University, Kita10, Nishi8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Keisuke Saito
- Institute for Raptor Biomedicine Japan, 2-2101 Hokuto, Kushiro-shi, Hokkaido 084-0922, Japan
| | - Yukiko Watanabe
- Institute for Raptor Biomedicine Japan, 2-2101 Hokuto, Kushiro-shi, Hokkaido 084-0922, Japan
| | - Kohei Ogasawara
- Institute for Raptor Biomedicine Japan, 2-2101 Hokuto, Kushiro-shi, Hokkaido 084-0922, Japan
| | - Manabu Onuma
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Atsushi Haga
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Mayumi Ishizuka
- Laboratory of Toxicology, Department of Environmental Veterinary Sciences, School of Veterinary Medicine, Hokkaido University, Kita18, Nishi9, Kita-ku, Sapporo, Hokkaido 060-0818, Japan
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Yamaguchi N, Kusunose K, Haga A, Morita S, Hirata Y, Torii Y, Nishio S, Ookushi Y, Takahashi T, Yamada N, Yamada H, Sata M. 540 Assessment of left ventricular ejection fraction from echocardiographic images using machine learning algorithm. Eur Heart J Cardiovasc Imaging 2020. [DOI: 10.1093/ehjci/jez319.274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Precise and reliable echocardiographic assessment of LVEF is needed for clinical decision-making. LVEF is currently determined through an observer dependent process that requires manual tracing. To remove this manual tracing step, which is both time-consuming and user dependent, automatic computer aided diagnosis systems may be useful in the clinical setting.
Purpose
The aim of this study was to evaluate whether a 3-dimensional convolutional neural networks (3DCNN) could estimate left ventricular ejection fraction (LVEF) and differentiate types of heart failure (preserved EF/reduced EF) using conventional 2-dimensional echocardiographic images.
Methods
We developed a deep learning model to automatically estimate LVEF from echocardiographic data. The 3DCNN model was trained on a dataset of 340 patients. The dataset creation consisted of three main steps: firstly, for each exam, cine-loops showing the parasternal and apical views were manually selected; then, 10 sequential frames were extracted from each 1 beat and; finally, each frame was pre-processed to fit the learning model. Each patient has 2 views, resulting in a total of 6,800 images. Reference LVEF measurement was calculated by two highly experienced readers in each case.
Results
A good correlation was found between estimated LVEF based on apical 2 and 4 chamber views and reference LVEF (r =0.88, p <0.001) (Figure). For classification of heart failure types based on LVEF (LVEF ≥50% or <50%), the area under the receiver-operating characteristic curve by the 3DCNN algorithm was over 0.95.
Conclusions
The 3DCNN can be applied to estimate and classify the LVEF in the clinical setting. Furthermore, this work will serve as a driver for future research using million image databases.
Abstract 540 Figure.
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Affiliation(s)
- N Yamaguchi
- Tokushima University Hospital, Ultrasound Examination Center, Tokushima, Japan
| | - K Kusunose
- Tokushima University Hospital, Cardiovascular Medicine, Tokushima, Japan
| | - A Haga
- Graduate School of Biomedical Sciences, Radiology and Radiation Oncology, Tokushima, Japan
| | - S Morita
- Tokushima University Hospital, Ultrasound Examination Center, Tokushima, Japan
| | - Y Hirata
- Tokushima University Hospital, Ultrasound Examination Center, Tokushima, Japan
| | - Y Torii
- Tokushima University Hospital, Ultrasound Examination Center, Tokushima, Japan
| | - S Nishio
- Tokushima University Hospital, Ultrasound Examination Center, Tokushima, Japan
| | - Y Ookushi
- Tokushima University Hospital, Cardiovascular Medicine, Tokushima, Japan
| | - T Takahashi
- Tokushima University Hospital, Cardiovascular Medicine, Tokushima, Japan
| | - N Yamada
- Tokushima University Hospital, Cardiovascular Medicine, Tokushima, Japan
| | - H Yamada
- Tokushima University Graduate School of Biomedical Sciences, Community Medicine for Cardiology, Tokushima, Japan
| | - M Sata
- Tokushima University Hospital, Cardiovascular Medicine, Tokushima, Japan
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Kobayashi S, Kinjo T, Kuroda Y, Kinjo M, Okawara Y, Izawa M, Onuma M, Haga A, Nakaya Y, Nagamine T. Predation on Endangered Species by Cats in the Northern Forests of Okinawa-Jima Island, Japan. Mammal Study 2019. [DOI: 10.3106/ms2019-0017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Shun Kobayashi
- Faculty of Science, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa 903-0213, Japan
| | - Takaya Kinjo
- Okinawa Wildlife Federation, 308-7-205 Maehara, Uruma, Okinawa 904-2235, Japan
| | - Yubi Kuroda
- Okinawa Wildlife Federation, 308-7-205 Maehara, Uruma, Okinawa 904-2235, Japan
| | - Michio Kinjo
- Okinawa Wildlife Federation, 308-7-205 Maehara, Uruma, Okinawa 904-2235, Japan
| | - Yoko Okawara
- Graduate School of Engineering and Science, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa 903-0213, Japan
| | - Masako Izawa
- Faculty of Science, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa 903-0213, Japan
| | - Manabu Onuma
- Ecological Risk Assessment and Control Section, Center for Environmental Biology and Ecosystem Studies, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Atsushi Haga
- Ecological Risk Assessment and Control Section, Center for Environmental Biology and Ecosystem Studies, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Yumiko Nakaya
- Okinawa Wildlife Federation, 308-7-205 Maehara, Uruma, Okinawa 904-2235, Japan
| | - Takashi Nagamine
- Okinawa Wildlife Federation, 308-7-205 Maehara, Uruma, Okinawa 904-2235, Japan
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Okamatsu M, Ozawa M, Soda K, Takakuwa H, Haga A, Hiono T, Matsuu A, Uchida Y, Iwata R, Matsuno K, Kuwahara M, Yabuta T, Usui T, Ito H, Onuma M, Sakoda Y, Saito T, Otsuki K, Ito T, Kida H. Characterization of Highly Pathogenic Avian Influenza Virus A(H5N6), Japan, November 2016. Emerg Infect Dis 2018; 23:691-695. [PMID: 28322695 PMCID: PMC5367431 DOI: 10.3201/eid2304.161957] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Highly pathogenic avian influenza viruses (HPAIVs) A(H5N6) were concurrently introduced into several distant regions of Japan in November 2016. These viruses were classified into the genetic clade 2.3.4.4c and were genetically closely related to H5N6 HPAIVs recently isolated in South Korea and China. In addition, these HPAIVs showed further antigenic drift.
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Mizutani T, Magome T, Igaki H, Haga A, Nawa K, Sekiya N, Nakagawa K. Survival Time Prediction after Radiotherapy for Malignant Glioma Patients Based on Clinical and DVH Features Using Support Vector Machine. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.2285] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Takahashi W, Aoki S, Yamashita H, Ogita M, Nakagawa K, Haga A. CT-Based Radiomics Histology Analysis of Stereotactic Ablative Radiation Therapy Patients with Early-Stage Non–small Cell Lung Cancer. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.2349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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Hiono T, Okamatsu M, Matsuno K, Haga A, Iwata R, Nguyen LT, Suzuki M, Kikutani Y, Kida H, Onuma M, Sakoda Y. Characterization of H5N6 highly pathogenic avian influenza viruses isolated from wild and captive birds in the winter season of 2016-2017 in Northern Japan. Microbiol Immunol 2017; 61:387-397. [DOI: 10.1111/1348-0421.12506] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Revised: 07/20/2017] [Accepted: 08/12/2017] [Indexed: 11/29/2022]
Affiliation(s)
- Takahiro Hiono
- Laboratory of Microbiology; Department of Disease Control; Faculty of Veterinary Medicine; Japan
| | - Masatoshi Okamatsu
- Laboratory of Microbiology; Department of Disease Control; Faculty of Veterinary Medicine; Japan
| | - Keita Matsuno
- Laboratory of Microbiology; Department of Disease Control; Faculty of Veterinary Medicine; Japan
- Global Station for Zoonosis Control; Global Institution for Collaborative Research and Education (GI-CoRE); Japan
| | - Atsushi Haga
- National Institute for Environmental Studies; Tsukuba; Ibaraki 305-8506 Japan
| | - Ritsuko Iwata
- National Institute for Environmental Studies; Tsukuba; Ibaraki 305-8506 Japan
| | - Lam Thanh Nguyen
- Laboratory of Microbiology; Department of Disease Control; Faculty of Veterinary Medicine; Japan
| | - Mizuho Suzuki
- Laboratory of Microbiology; Department of Disease Control; Faculty of Veterinary Medicine; Japan
| | - Yuto Kikutani
- Laboratory of Microbiology; Department of Disease Control; Faculty of Veterinary Medicine; Japan
| | - Hiroshi Kida
- Global Station for Zoonosis Control; Global Institution for Collaborative Research and Education (GI-CoRE); Japan
- Research Center for Zoonosis Control; Hokkaido University; Sapporo Hokkaido 001-0020 Japan
| | - Manabu Onuma
- National Institute for Environmental Studies; Tsukuba; Ibaraki 305-8506 Japan
| | - Yoshihiro Sakoda
- Laboratory of Microbiology; Department of Disease Control; Faculty of Veterinary Medicine; Japan
- Global Station for Zoonosis Control; Global Institution for Collaborative Research and Education (GI-CoRE); Japan
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Onuma M, Kakogawa M, Yanagisawa M, Haga A, Okano T, Neagari Y, Okano T, Goka K, Asakawa M. Characterizing the temporal patterns of avian influenza virus introduction into Japan by migratory birds. J Vet Med Sci 2017; 79:943-951. [PMID: 28484128 PMCID: PMC5447987 DOI: 10.1292/jvms.16-0604] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
The objectives of the present study were to observe the temporal pattern of avian influenza virus (AIV) introduction into Japan and to determine which migratory birds play an important role in introducing AIV. In total, 19,407
fecal samples from migratory birds were collected at 52 sites between October 2008 and May 2015. Total nucleic acids extracted from the fecal samples were subjected to reverse transcription loop–mediated isothermal amplification
to detect viral RNA. Species identification of host migratory birds was conducted by DNA barcoding for positive fecal samples. The total number of positive samples was 352 (prevalence, 1.8%). The highest prevalence was observed in
autumn migration, and a decrease in prevalence was observed. During autumn migration, central to southern Japan showed a prevalence higher than the overall prevalence. Thus, the main AIV entry routes may involve crossing the Sea
of Japan and entry through the Korean Peninsula. Species identification was successful in 221 of the 352 positive samples. Two major species sequences were identified: the Mallard/Eastern Spot-billed duck group (115 samples;
52.0%) and the Northern pintail (61 samples; 27.6%). To gain a better understanding of the ecology of AIV in Japan and the introduction pattern of highly pathogenic avian influenza viruses, information regarding AIV prevalence by
species, the prevalence of hatch-year migratory birds, migration patterns and viral subtypes in fecal samples using egg inoculation and molecular-based methods in combination is required.
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Affiliation(s)
- Manabu Onuma
- Ecological Risk Assessment and Control Section, Center for Environmental Biology and Ecosystem, National Institute for Environmental Studies, 16-2, Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Masayoshi Kakogawa
- Kobe Animal Kingdom, Kobe, Hyogo 650-0047, Japan.,Department of Pathobiology, Graduate School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido 069-8501, Japan
| | - Masae Yanagisawa
- Pathological and Physiochemical Examination Division, Laboratory Department, Animal Quarantine Service, 11-1, Haramachi, Isogoku, Yokohama, Kanagawa 235-0008, Japan
| | - Atsushi Haga
- Ecological Risk Assessment and Control Section, Center for Environmental Biology and Ecosystem, National Institute for Environmental Studies, 16-2, Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Tomomi Okano
- Ecological Genetics Analysis Section, Center for Environmental Biology and Ecosystem, National Institute for Environmental Studies, 16-2, Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Yasuko Neagari
- Biological Resource Laboratory, Laboratory for Intellectual Fundamentals for Environmental Studies, National Institute for Environmental Studies, 16-2, Onogawa, Tuskuba, Ibaraki 305-8506, Japan
| | - Tsukasa Okano
- Ecological Genetics Analysis Section, Center for Environmental Biology and Ecosystem, National Institute for Environmental Studies, 16-2, Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Koichi Goka
- Ecological Risk Assessment and Control Section, Center for Environmental Biology and Ecosystem, National Institute for Environmental Studies, 16-2, Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Mitsuhiko Asakawa
- Department of Pathobiology, Graduate School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido 069-8501, Japan
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Okuma K, Haga A, Imae Y, Takahashi W, Nakagawa K. EP-1136: Technical results of total skin irradiation using helical TomoTherapy. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)31572-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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13
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Nakano M, Haga A, Kotoku J, Magome T, Masutani Y, Hanaoka S, Nakagawa K. MO-DE-207A-08: Four-Dimensional Cone-Beam CT Iterative Reconstruction with Time-Ordered Chain Graph Model for Non-Periodic Organ Motion and Deformation. Med Phys 2016. [DOI: 10.1118/1.4957236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Magome T, Haga A, Takahashi Y, Nakagawa K, Dusenbery K, Hui S. WE-DE-BRA-09: Fast Megavoltage CT Imaging with Rapid Scan Time and Low Imaging Dose in Helical Tomotherapy. Med Phys 2016. [DOI: 10.1118/1.4957838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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15
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Haga A, Magome T, Nakano M, Kotoku J, Nakagawa K. SU-F-J-23: Field-Of-View Expansion in Cone-Beam CT Reconstruction by Use of Prior Information. Med Phys 2016. [DOI: 10.1118/1.4955931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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16
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Kotoku J, Kumagai S, Nakabayashi S, Haga A, Kobayashi T. SU-G-JeP4-03: Anomaly Detection of Respiratory Motion by Use of Singular Spectrum Analysis. Med Phys 2016. [DOI: 10.1118/1.4957113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Okuma K, Haga A, Imae T, Takenaka R, Sugaya M, Nakagawa K. EP-1391: Total skin irradiation using helical tomotherapy: a novel experience and report of three cases. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)32641-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Kotoku J, Kumagai S, Haga A, Nakabayashi S, Arai N, Kobayashi T. TU-F-CAMPUS-J-03: Prediction of Respiratory Motion Using State Space Models. Med Phys 2015. [DOI: 10.1118/1.4925793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Haga A, Kotoku J, Horikawa Y, Nakagawa K. SU-E-I-43: Photoelectric Cross Section Revisited. Med Phys 2015. [DOI: 10.1118/1.4924040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Kon D, Nakano M, Nawa K, Haga A, Nakagawa K. SU-E-T-517: Investigation of Factors Contributing to Extracranial Radiation Doses From Leksell Gamma Knife. Med Phys 2015. [DOI: 10.1118/1.4924879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Shiraishi K, Sakumi A, Haga A, Yamamoto K, Okuma K, Yoda K, Nakagawa K. EP-1607: Impact of brachytherapy seeds on dose distributions for prostate VMAT: a phantom study. Radiother Oncol 2015. [DOI: 10.1016/s0167-8140(15)41599-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Takahashi W, Yamashita H, Imae T, Futaguchi M, Sakuramachi M, Sakumi A, Ohtomo K, Nakagawa K, Haga A. EP-1488: Updated verification system for VMAT for SBRT using intreatment 4-dimensional cone beam CT. Radiother Oncol 2015. [DOI: 10.1016/s0167-8140(15)41480-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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23
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Sakumi A, Yamamoto K, Haga A, Okuma K, Igaki H, Iwai Y, Yoda K, Nakagawa K. Impact of a Low Transmission Multileaf Collimator on the Parotid Grand Dose in Head and Neck Volumetric Modulated Arc Therapy Planning: A Dose-Volume Histogram Comparison Between 2-Step Adaptive and Simultaneously Integrated Boost Techniques. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.2499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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24
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Igaki H, Magome T, Sakuramachi M, Nomoto A, Sakumi A, Kitaguchi M, Haga A, Itami J, Nakagawa K. Patterns of Recurrence in Malignant Glioma Patients: Association With Neurogenic Niche and Radiation Therapy Dose. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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25
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Kotoku J, Nakabayashi S, Haga A, Kumagai S, Ishibashi T, Arai N, Saotome N, Kobayashi T. SU-E-J-128: 3D Surface Reconstruction of a Patient Using Epipolar Geometry. Med Phys 2014. [DOI: 10.1118/1.4888180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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26
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Haga A, Nakagawa K, Maurer C, Ruchala K, Chao E, Casey D, Ida S, Sakata D, Magome T, Nakano M, Masutani Y. SU-E-J-203: Reconstruction of the Treatment Area by Use of Sinogram in Helical Tomotherapy. Med Phys 2014. [DOI: 10.1118/1.4888256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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27
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Hashimoto M, Nishio T, Haga A, Hanada T, Kabuki S, Kozuka T, Oguchi M. SU-E-CAMPUS-T-03: Four-Dimensional Dose Distribution Measurement Using Plastic Scintillator. Med Phys 2014. [DOI: 10.1118/1.4889004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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28
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Nakano M, Kida S, Masutani Y, Shiraki T, Yamamoto K, Shiraishi K, Nakagawa K, Haga A. SU-E-J-167: Improvement of Time-Ordered Four Dimensional Cone-Beam CT; Image Mosaicing with Real and Virtual Projections. Med Phys 2014. [DOI: 10.1118/1.4888220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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29
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Imae T, Haga A, Saotome N, Kida S, Nakano M, Takeuchi Y, Shiraki T, Yano K, Yamashita H, Nakagawa K, Ohtomo K. SU-E-T-113: Dose Distribution Using Respiratory Signals and Machine Parameters During Treatment. Med Phys 2014. [DOI: 10.1118/1.4888443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Saotome N, Haga A, Imae T, Kida S, Nakano M, Yamashita H, Nakagawa K, Ohtomo K. SU-C-BRF-04: Delivered 4D Dose Calculation for Lung-VMAT Patients Using In- Treatment CBCT and LINAC Log Data. Med Phys 2014. [DOI: 10.1118/1.4889724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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31
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Sakata D, Kida S, Nakano M, Masutani Y, Nakagawa K, Haga A. SU-E-I-99: Estimation of Effective Charge Distribution by Dual-Energy CT Reconstruction. Med Phys 2014. [DOI: 10.1118/1.4888049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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32
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Magome T, Haga A, Igaki H, Sekiya N, Masutani Y, Sakumi A, Mukasa A, Nakagawa K. TH-E-BRF-05: Comparison of Survival-Time Prediction Models After Radiotherapy for High-Grade Glioma Patients Based On Clinical and DVH Features. Med Phys 2014. [DOI: 10.1118/1.4889669] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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33
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Shiraishi K, Yamamoto K, Haga A, Sakumi A, Futaguchi M, Nomoto A, Onoe T, Nakagawa K. Volumetric Modulated Arc Therapy (VMAT) in the Treatment of Localized Prostate Cancer: Initial Experience in 200 Patients. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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34
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Haga A, Saegusa S, Kotoku J, Yamashita H, Sakumi A, Nakagawa K. What Respiratory-Phase CT Is Optimal in Treatment Planning of Lung Cancer? Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.1404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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35
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Nakagawa K, Haga A, Takahashi W, Yamashita H, Imae T, Kida S, Masutani Y, Kotoku J, Sakumi A, Ohtomo K. Accuracy Verification of 4D Cone Beam CT (CBCT)-Based Lung Tumor Registration by Way of In-Treatment 4D CBCT Analysis. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.1993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Saotome N, Kida S, Imae T, Sasaki K, Sakumi A, Masutani Y, Haga A, Gawa KN. SU-E-J-219: The Performance Test of EPID for In-Vivo Dosimetry. Med Phys 2013. [DOI: 10.1118/1.4814431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Kotoku J, Haga A, Kumagai S, Saotome N, Kobayashi T. MO-D-108-03: Energy Spectrum Inference of Clinical Photon Beam by Use of PDD. Med Phys 2013. [DOI: 10.1118/1.4815237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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38
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Kida S, Nakano M, Masutani Y, Nakagawa K, Haga A. SU-E-I-14: Improvement of Four Dimensional Cone Beam CT Image Quality with Iterative Reconstruction. Med Phys 2013. [DOI: 10.1118/1.4814122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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39
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Futaguchi M, Haga A, Sakumi A, Okamoto H, Hamada M, Fuse M, Abe Y, Murakami N, Itami J, Nakagawa K. SU-E-T-338: Calculation of Dose Distributions From 106 Ruthenium COC-Type Eye Applicator. Med Phys 2013. [DOI: 10.1118/1.4814772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Haga A, Kotoku J, Kida S, Masutani Y, Yamashita H, Takahashi W, Imae T, Nakagawa K. SU-C-141-06: Registration Accuracy with Four-Dimensional Cone-Beam CT for Lung Cancer Treatment. Med Phys 2013. [DOI: 10.1118/1.4813966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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41
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Nakano M, Kida S, Masutani Y, Shiraki T, Shiraishi K, Yamamoto K, Nakagawa K, Haga A. SU-E-J-122: Time-Ordered Four Dimensional Cone-Beam CT. Med Phys 2013. [DOI: 10.1118/1.4814334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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42
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Haga A, Okamoto T, Yamada S, Kubota T, Sanpei A, Takahashi S, Nakayama M, Nagai M, Otaka M, Miyazaki T, Nunomura W, Grave E, Itoh H. Zinc-L-carnosine binds to molecular chaperone HSP70 and inhibits the chaperone activity of the protein. J Biochem 2013; 154:249-56. [DOI: 10.1093/jb/mvt041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
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43
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Nakagawa K, Haga A, Takahashi W, Yamashita H, Imae T, Kida S, Masutani Y, Sakumi A, Ohtomo K. PD-0043: Accuracy comparison of 3D and 4D CBCT based lung tumor registrations by way of in-treatment 4D CBCT analysis. Radiother Oncol 2013. [DOI: 10.1016/s0167-8140(15)32349-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Sakumi A, Mizuno K, Nishijima Y, Uesaka M, Haga A, Iwai Y, Yoda K, Nakagawa K. PO-0873: Evaluation of an intrafraction 4D cone-beam CT (CBCT) imaging system. Radiother Oncol 2013. [DOI: 10.1016/s0167-8140(15)33179-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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45
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Takahashi W, Haga A, Yamamoto N, Yamashita H, Imae T, Kida S, Sakumi A, Ohtomo K, Kamada T, Nakagawa K. PO-0676: Verification system for image-guided radiation therapy by using in-treatment 4D CBCT. Radiother Oncol 2013. [DOI: 10.1016/s0167-8140(15)32982-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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46
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Yamamoto K, Shiraishi K, Nomoto A, Haga A, Sakumi A, Nakagawa K. PO-0729: Development of late toxicity treated with image-guided volumetric modulated arc therapy for prostate cancer. Radiother Oncol 2013. [DOI: 10.1016/s0167-8140(15)33035-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Hashimoto M, Haga A, Takahashi R, Nakajima M, Hashimoto T, Saotome S, Sato T, Nakagawa K, Kozuka T, Oguchi M. Verification of MLC Position Using Electric Portal Imaging Device During VMAT Delivery. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.2057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Saotome N, Kida S, Haga A, Masutani Y, Ohtomo K, Nakagawa K. SU-E-J-33: Geometric Agreement Check for Imaging System with Radiation Beam by KV and MV-CBCT. Med Phys 2012; 39:3659. [DOI: 10.1118/1.4734866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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49
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Haga A, Nakagawa K, Yamashita H, Takahashi W, Sakumi A, Masutani Y, Kida S, Saotome N, Itoh S, Shiraki T, Ohtomo K. SU-E-J-203: Determination of PTV Margin for Lung Tumor Using In-Treatment 4D CBCT. Med Phys 2012; 39:3699. [PMID: 28519043 DOI: 10.1118/1.4735043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
PURPOSE To determine a planning target volume (PTV) margin for lung cancer patients using a four-dimensional cone-beam CT (4D CBCT) acquired during volumetric modulated arc therapy (VMAT) treatment. METHODS A VMAT plan for lung cancer patients was created by Pinnacle v9.0 (Philips) treatment planning system (TPS), where the gross target volume (GTVs) in each breathing phase was delineated by using 4D-planning CT scan (TOSHIBA and ANZAI). The VMAT treatment was performed with a stereotactic body frame after the registration using Elekta X-ray volume imaging (XVI) unit. Simultaneous cone-beam projection images were acquired for 3 or 4 fractions of 10 patients. The in-treatment 4D CBCT was reconstructed by dividing into four breathing phase bins. A total of 38 in-treatment 4D-CBCT sets were exported to Pinnacle TPS. The isocenter of in-treatment 4D CBCT was matched with that of 4D-planning CT. The tumor motion during treatment was manually tracked on in-treatment 4D CBCT, and the center-of-mass (COM) location of the tumor was estimated. Analyzing the tumor regions observed by in-treatment 4D CBCT, a PTV margin in our system was derived. RESULTS The average difference in COM location of the tumor was less than 1mm for all directions, while the standard deviations (SD's) were about 1.3mm, 1.6mm, and 2.1mm for the lateral, the vertical, and the longitudinal directions, respectively. The large discrepancy more than 3mm was observed for one patient. The required PTV margin was about 3-4mm for the lateral and the vertical directions, whereas it was about 5mm for the longitudinal direction. CONCLUSIONS The uncertainties of the tumor motion caused by respiration were observed by in-treatment 4D CBCT images. It was feasible to determine the PTV margin from 4D volume images. K. Nakagawa receives research funding from Elekta.
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Affiliation(s)
- A Haga
- The University of Tokyo Hospital, Tokyo, Japan
| | - K Nakagawa
- The University of Tokyo Hospital, Tokyo, Japan
| | - H Yamashita
- The University of Tokyo Hospital, Tokyo, Japan
| | - W Takahashi
- The University of Tokyo Hospital, Tokyo, Japan
| | - A Sakumi
- The University of Tokyo Hospital, Tokyo, Japan
| | - Y Masutani
- The University of Tokyo Hospital, Tokyo, Japan
| | - S Kida
- The University of Tokyo Hospital, Tokyo, Japan
| | - N Saotome
- The University of Tokyo Hospital, Tokyo, Japan
| | - S Itoh
- The University of Tokyo Hospital, Tokyo, Japan
| | - T Shiraki
- The University of Tokyo Hospital, Tokyo, Japan
| | - K Ohtomo
- The University of Tokyo Hospital, Tokyo, Japan
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Kotoku J, Kobayashi T, Arai N, Hatakeyama T, Kumagai S, Haga A. SU-E-T-56: Energy Spectrum Inference of X-Rays from a Linac. Med Phys 2012. [DOI: 10.1118/1.4735112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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