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①本，②特許，③投稿論文，④プロシーディングス，⑤解説・総説，⑥国際会議発表，⑦国内会議発表，⑧その他・研究会についての成果リストです． どの成果にも学生さんとの思い出が詰まっています．
01Books
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A novel algorithm to create quantitative X-ray images based on precise analysis of polychromatic X-ray attenuation
Natsumi KIMOTO, Hiroaki HAYASHI, Rina NISHIGAMI, Daiki KOBAYASHI, Tatsuya MAEDA, Akitoshi KATSUMATA
Emerging Radiation Detection: Technology and Applications (edited by Krzysztof Iniewski and Harish Gadey), Chapter **, pp.**-**, Springer, 2024
ISBN:(編集中)
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Impact of blurring correction method in quantitative image analysis using energy-resolving photon counting detector (ERPCD)
Hiroaki HAYASHI, Daiki KOBAYASHI, Rina NISHIGAMI, Natsumi KIMOTO, Tatsuya MAEDA, Takashi ASAHARA
CdTe and CdZnTe Materials: Material Properties and Applications (edited by Krzysztof Iniewski), Chapter **, pp.**-**, Springer, 2024
ISBN:(編集中)
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Quantitative Analysis Methodology of X-Ray Attenuation for Medical Diagnostic Imaging: Algorithm to Derive Effective Atomic Number and Soft Tissue and Bone Images
Natsumi KIMOTO, Hiroaki HAYASHI, Cheonghae LEE, Tatsuya MAEDA, Daiki Kobayashi, Rina Nishigami, Akitoshi KATSUMATA
Photon Counting Computed Tomography: Clinical Applications, Image Reconstruction and Material Discrimination (edited by Scott Hsieh and Kris Iniewski), Chapter 11, pp.219-245, Springer, 2023
ISBN:978-3-031-26061-2
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Algorithm for Generating Effective Atomic Number, Soft-Tissue, and Bone Images Based on Analysis Using an Energy-Resolving Photon-Counting Detector
Natsumi KIMOTO, Hiroaki HAYASHI, Cheonghae LEE, Tatsuya MAEDA, Akitoshi KATSUMATA
Advanced X-Ray Radiation Detection: Medical Imaging and Industrial Applications (edited by Kris Iniewski), Chapter 4, pp.75-106, Springer, 2022
ISBN:978-3-030-92988-6
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Photon Counting Detectors for X-ray Imaging: Physics and Applications
Hiroaki HAYASHI, Natsumi KIMOTO, Takashi ASAHARA, Takumi ASAKAWA, Cheonghae LEE, Akitoshi KATSUMATA
Chapter 1-5, pp.1-119, Springer, 2021
ISBN:978-3-030-62679-2
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Importance of Considering the Physics of a Multi-Pixel-Type Photon Counting Detector Towards the Development of a Novel Medical X-Ray Imaging Method Based on Material Identification
Hiroaki HAYASHI, Natsumi KIMOTO, Takumi ASAKAWA, Akitoshi KATSUMATA
Advances in Medicine and Biology. Volume 141: edited by Leon V. Berhardt, Chapter 1 (46 pages), Nova Science Publishers, Inc., 2019
ISBN: 978-1-53615-637-9
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Response function of two-dimensional CdTe detector
Hiroaki HAYASHI
Semiconductor Radiation Detectors, Technology, and Applications 1st edition : edited by Salim Reza, Chapter 4 (pp.85-108), CRC press, 2017
ISBN:9781138710344
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02Patents
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ＣＴ撮影に用いる放射線遮蔽体の性能評価方法
林裕晃，前田達哉，淺原孝，小林大空，西上莉奈，竹上和希，後藤聡汰，真木基允，小西武四，村上修一，森本真一
特願2024-000808
2024
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IMAGE PROCESSING METHOD AND IMAGE PROCESSING DEVICE
Shuichiro Yamamoto, Natsumi Kimoto, Hiroaki Hayashi, Daiki Kobayashi
No.18/536,424(米国特許出願)
2023
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画像処理方法および画像処理装置
山本修一郎，紀本夏実，林裕晃，小林大空
特願2023-188474
2023
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X線CT検査における被曝線量実測値をCT画像を援用して解析するシステム
林裕晃，竹上和希，前田達哉，淺原孝，後藤聡汰，西上莉奈，小林大空
国内優先権出願(特願2023-043229の修正)：特願2023-111491
2023
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X線CT検査における被曝線量実測値をCT画像を援用して解析するシステム
林裕晃，竹上和希，前田達哉，淺原孝，後藤聡汰
特願2023-043229
2023
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X線遮蔽シート
林裕晃，前田達哉，真木基允，小西武四，村上修一
実願2022-004007，実登3241118
2022
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放射線計測システム
林裕晃，淺原孝，前田達哉，小林大空
特願2022-123220，特開2024-020779
2022
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X線CT検査用の首巻き型甲状腺防護カバー
前田達哉，竹上和希，林裕晃，真木基允，村上修一，田中豊，森本真一
実願2021-3549，実録3234936
2021
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骨密度測定用X線遮蔽シート
林裕晃，前田達哉，安藤未来，真木基允，田中豊，小西武四
実願2021-002736，実登3234043
2021
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X射線屏蔽片
林裕晃，竹上和希，前田達哉，真木基允，小西武四，村上修一
第110202838号(台湾での実用新案)
2021
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X射线屏蔽片
林裕晃，竹上和希，前田達哉，真木基允，小西武四，村上修一
第ZL 2021 2 0589923.0号(中国での実用新案)
2021
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チェッキング素子の製造方法
山口英俊，清水森人，後藤聡汰，林裕晃，関口寛，秋野隆二
特願2021-055388，特開2022-152569
2021
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検出器の校正装置および校正方法
山本修一郎，岡田雅宏，山崎雅志，橋本大輔，林裕晃，紀本夏実
(国際出願), JP0-PAS i410, PCT/JP2021/010034(米国)
2021
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アーチファクトを低減可能なX線遮蔽シート
林裕晃，竹上和希，前田達哉，真木基允，小西武四，村上修一
特願2020-67902，特開2021-146162
2020
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X線遮蔽シート
林裕晃，前田達哉，真木基允，小西武四，村上修一
特願2020-105659，特開2021-135278
2020
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放射線線量計
林裕晃，淺原孝，前田達哉
特願2019-195607，特開2021-067650
2019
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放射線線量計
林裕晃，後藤聡汰，冨田恵美
特願2019-055791，特開2020-076729，特許7220907
2018
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03Papers
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A Blurring Correction Method Suitable to Analyze Quantitative X-ray Images Derived from Energy-Resolving Photon Counting Detector
Daiki Kobayashi, Hiroaki Hayashi, Rina Nishigami, Tatsuya Maeda, Takashi Asahara, Yuki Kanazawa, Akitoshi Katsumata, Natsumi Kimoto, Shuichiro Yamamoto
Physics in Medicine and Biology 69, 075023(16 pages), 2024.
DOI:10.1088/1361-6560/ad3119
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Conversion Map from Quantitative Parameter Mapping to Myelin Water Fraction: Comparison with R1·R2* and Myelin Water Fraction in White Matter
Shyun Kitano, Yuki Kanazawa, Masafumi Harada, Yo Taniguchi, Hiroaki Hayashi, Yuki Matsumoto, Kosuke Ito, Yoshitaka Bito, Akihiro Haga
Magnetic Resonance Materials in Physics, Biology and Medicine, 1155(12 pages), 2024
DOI:10.1007/s10334-024-01155-w
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Differences of white matter structure for diffusion kurtosis imaging using voxel-based morphometry and connectivity analysis
Yuki Kanazawa, Natsuki Ikemitsu, Yuki Kinjyo, Masafumi Harada, Hiroaki Hayashi, Yo Taniguchi, Kosuke Ito, Yoshitaka Bito, Yuki Matsumoto, Akihiro Haga
BJR Open 6(1), 1–7, 2024
DOI:10.1093/bjro/tzad003
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Determination of Alzheimer's disease based on morphology and atrophy using machine learning combined with automated segmentation
Natsuki Ikemitsu, Yuki Kanazawa, Akihiro Haga, Hiroaki Hayashi, Yuki Matsumoto, and Masafumi Harada
Acta Radiologica, 1-8, 2024
DOI:10.1177/02841851231218384
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Simplified assessment for chemical exchanged saturation transfer (CEST) imaging: local offset frequency and CEST effect
Daiki Chiba, Yuki Kanazawa, Tosiaki Miyati, Masafumi Harada, Mitsuharu Miyoshi, Hiroaki Hayashi, Akihiro Haga
Radiological Physics and Technology, 17, 93-102, 2024
DOI:10.1007/s12194-023-00752-z
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Performance of elastic X-ray shield made by embedding Bi2O3 particles in porous polyurethane
Tatsuya MAEDA, Hiroaki HAYASHI, Miku ANDO, Daiki KOBAYASHI, Rina NISHIGAMI, Takashi ASAHARA, Sota GOTO, Cheonghae LEE, Kazuta YAMASHITA, Kosaku HIGASHINO, Takeshi KONISHI, Shuichi MURAKAMI, Motochika MAKI
Medical Physics 51(2), 1061-1073, 2023
DOI:10.1002/mp.16889
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Radiation exposure doses to the surgical team during hip surgery is significantly higher during lateral imaging than posteroanterior imaging: a cadaveric simulation study
Yasuaki Tamaki, Kazuta Yamashita, Daiki Nakajima,Yasuyuki Omichi, Yoshinori Takahashi, Michihiro Takai, Shunsuke Tamaki, Tomohiro Goto, Hiroaki Hayashi, Kosaku Higashino, Yoshihiro Tsuruo, Koichi Sairyo
Journal of Occupational Medicine and Toxicology, 18:27(6 pages), 2023
DOI:10.1186/s12995-023-00396-0
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A wearable active-type X-ray dosimeter having novel functions to derive both incident direction and absolute exposure dose
Takashi ASAHARA, Hiroaki HAYASHI, Tatsuya MAEDA, Sota GOTO, Daiki KOBAYASHI, Rina NISHIGAMI, Cheonghae LEE, Miku ANDO, Yuki KANAZAWA, Satoshi IMAJO, Kazuta YAMASHITA, Kosaku HIGASHINO
Radiation Physics and Chemistry, 208, 110932(11 pages), 2023
DOI:10.1016/j.radphyschem.2023.110932
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Signal-stabilized Al2O3:C-OSL dosimeter "checking chip" for correcting OSL reader sensitivity variation
Sota GOTO, Hiroaki HAYASHI, Hidetoshi YAMAGUCHI, Ryuji AKINO, Morihito SHIMIZU
Radiation Measurements, 160, 106893 (8 pages), 2023
DOI:10.1016/j.radmeas.2022.106893
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A cadaveric simulation study of radiation exposure to the surgical team during fluoroscopic spinal surgery: How much are we exposed?
Kazuta YAMASHITA, Yasuaki TAMAKI, Daiki NAKAJIMA, Yasuyuki OMICHI, Yoshinori TAKAHASHI, Michihiro TAKAI, Tomohiro GOTO, Hiroaki HAYASHI, Kosaku HIGASHINO, Yoshihiro TSURUNO, Koichi SAIRYO
Spine Surgery and Related Research, Volume 7, pp.341-349, 2023
DOI:10.22603/ssrr.2022-0184
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Thyroid dose reduction shield with the generation of less artifacts used for fast chest CT examination
Kazuki TAKEGAMI, Hiroaki HAYASHI, Tatsuya MAEDA, Cheonghae LEE, Rina NISHIGAMI, Takashi ASAHARA, Sota GOTO, Daiki KOBAYASHI, Miku ANDO, Yuki KANAZAWA, Kazuta YAMASHITA, Kosaku HIGASHINO, Shuichi MURAKAMI, Takeshi KONISHI, Motochika MAKI
Radiation Physics and Chemistry, 203, 110635(12 pages), 2023
DOI:10.1016/j.radphyschem.2022.110635
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Myelin-weighted imaging derived from quantitative parameter mapping
Yuki Kanazawa, Masafumi Harada, Yo Taniguchi, Hiroaki Hayashi, Takeshi Abe, Maki Otomo, Yuki Matsumoto, Masaharu Ono, Yoshitaka Bito, Akihiro Haga
European Journal of Radiology, 156, pp.110525 (9 pages), 2022
DOI:10.1016/j.ejrad.2022.110525
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Experimental study of X-ray dose reduction factor when using various size bismuth and lead particles
Tatsuya Maeda, Hiroaki Hayashi, Cheonghae Lee, Miku Ando, Kazuki Takegami, Natsumi Kimoto, Takeshi Konishi, Shuichi Murakami, Motochika Maki, Kazuta Yamashita, Kosaku Higashino
Radiation Physics and Chemistry, 195, 110049(11 pages), 2022
DOI:10.1016/j.radphyschem.2022.110049
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Author Correction: Direct measurement of radiation exposure dose to individual organs during diagnostic computed tomography examination
Kazuta Yamashita, Kosaku Higashino, Hiroaki Hayashi, Kazuki Takegami, Fumio Hayashi, Yoshihiro Tsuruo, Koichi Sairyo
Scientific Report, 12, 5035(3 pages), 2022
DOI:10.1038/s41598-022-08891-w
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Influence of distant scatterer on air kerma measurement in the evaluation of diagnostic X-rays using Monte Carlo simulation
Masahide Tominaga, Yukari Nagayasu, Motoharu Sasaki, Takuya Furuta, Hiroaki Hayashi, Masataka Oita, Yuichi Nishiyama, Akihiro Haga
Radiological Physics and Technology, 14, 381-389, 2021
DOI:10.1007/s12194-021-00641-3
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A novel algorithm for extracting soft-tissue and bone images measured using a photon-counting type X-ray imaging detector with the help of effective atomic number analysis
Natsumi KIMOTO, Hiroaki HAYASHI, Cheonghae LEE, Tatsuya MAEDA, Miku ANDO, Yuki KANAZAWA, Akitoshi KATSUMATA, Shuichiro YAMAMOTO, Masahiro OKADA
Applied Radiation and Isotopes, 176, 109822(12 pages), 2021
DOI:10.1016/j.apradiso.2021.109822
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A disposable OSL dosimeter for in-vivo measurement of rectum dose during brachytherapy
Hiroaki HAYASHI, Natsumi KIMOTO, Tatsuya MAEDA, Emi TOMITA, Takashi ASAHARA, Sota GOTO, Yuki KANAZAWA, Yasufumi SHITAKUBO, Kanako SAKURAGAWA, Hitoshi IKUSHIMA, Tohru OKAZAKI, Takuya HASHIZUME
Medical Physics, 48(8), 4621-4635, 2021
DOI:10.1002/mp.14857
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Direct measurement of radiation exposure dose to individual organs during diagnostic computed tomography examination: A cadaveric study
Kazuta Yamashita, Kosaku Higashino, Hiroaki Hayashi, Kazuki Takegami, Fumio Hayashi, Yoshihiro Tsuruo, Koichi Sairyo
Scientific Report, 11(1):5435(10 pages), 2021
DOI:10.1038/s41598-021-85060-5
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Effective atomic number image determination with an energy-resolving photon-counting detector using polychromatic X-ray attenuation by correcting for the beam hardening effect and detector response
Natsumi Kimoto, Hiroaki Hayashi, Takumi Asakawa, Cheonghae Lee, Takashi Asahara, Tatsuya Maeda, Sota Goto, Yuki Kanazawa, Akitoshi Katsumata, Shuichiro Yamamoto, Masahiro Okada
Applied Radiation and Isotopes, 170, 109617(14 pages), 2021
DOI:10.1016/j.apradiso.2021.109617
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Evaluation of calibration factor of OSLD toward eye lens exposure dose measurement of medical staff during IVR
Takashi ASAHARA, Hiroaki HAYASHI, Sota GOTO, Natsumi KIMOTO, Kazuki TAKEGAMI, Tatsuya MAEDA, Yuki KANAZAWA, Tohru OKAZAKI, Takuya HASHIZUME
Journal of Applied Clinical Medical Physics, 21(11), 263-271, 2020
DOI:10.1002/acm2.13042
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Quantitative analysis of vibration waves based on Fourier transform in magnetic resonance elastography
Ikuho KOSAKA, Yuki KANAZAWA, Kotaro BABA, Hiroaki HAYASHI, Masafumi HARADA
Radiological Physics and Technology, 13, 268-275, 2020
DOI:10.1007/s12194-020-00579-y
An idea to reduce angular dependence of dosimeter having a disk-shaped detection region
Sota GOTO, Hiroaki HAYASHI, Takashi ASAHARA, Natsumi KIMOTO, Emi TOMITA, Kazuki TAKEGAMI, Takumi ASAKAWA, Yuki KANAZAWA, Tohru OKAZAKI, Takuya HASHIZUME
Radiation Measurements, 137, 106323(9pages), 2020
DOI:10.1016/j.radmeas.2020.106323
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Appropriate echo time selection for quantitative susceptibility mapping
Yuki KANAZAWA, Yuki MATSUMOTO, Masafumi HARADA, Hiroaki HAYASHI, Tsuyoshi MATSUDA, Hideki Otsuka
Radiological Physics and Technology, 12(2), pp.185–193, 2019
DOI:10.1007/s12194-019-00513-x
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Evaluation of gamma-ray disturbing effect on readout of charged particle tracks using fluorescent nuclear track detector (FNTD)
Takuya Hashizume, Tohru Okazaki, Toshiya Sanami, Masayuki Hagiwara, Hideaki Monjushiro, Hiroaki Hayashi, Ikuo Kobayashi
Radiation Measurements, 122, pp.22-28, 2019
DOI:10.1016/j.radmeas.2018.12.001
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口内法撮影における受像体周囲の線量の推定-手指および撮影補助具による受像体保持方法の比較-
西山航，林裕晃，岩田哲成，泉雅浩，横谷隆二，有地榮一郎，岡崎徹，勝又明敏
歯科放射線; 58(2), pp.66-72, 2019
DOI:10.11242/dentalradiology.58.66
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Applicability of a Practical Calibration for the Small-type OSL Dosimeter for Measuring Doses from Direct X-rays and Penetrating X-rays Affected by Scattered Radiation
Tohru Okazaki, Hiroaki Hayashi, Yoshiki Mihara, Takashi Asahara, Natsumi Kimoto, Yuki Kanazawa, Kosaku Higashino, Kazuta Yamashita, Sumi Yokoyama, Kazuki Takegami, Takuya Hashizume, Vergil LE Cruz, Ikuo Kobayashi
Progress in Nuclear Science and Technology, 6, pp.22-25, 2019
DOI:10.15669/pnst.6.22
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Development of Novel Rectum Dosimeter using OSL sheet with the aim of Direct Dose Measurement of Organ Dose during Brachytherapy
Takashi Asahara, Hiroaki Hayashi, Emi Tomita, Kanako Sakuragawa, Hiroshi Saegusa, Yasufumi Shitakubo, Hitoshi Ikushima, Yuki Kanazawa, Yoshiki Mihara, Yoshinori Miyahara, Tohru Okazaki, Takuya Hashizume, Vergil LE Cruz
Progress in Nuclear Science and Technology, 6, pp.30-33, 2019
DOI:10.15669/pnst.6.30
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Direct Dose Measurement of Patients during Pediatric Computed Tomography Examination
Hiroaki Hayashi, Emi Tomita, Sota Goto, Natsumi Kimoto, Keiji Tada, Ryosuke Kasai, Yuki Kanazawa, Yoshiki Mihara, Takashi Asahara, Tohru Okazaki, Takuya Hashizume, Vergil LE Cruz
Progress in Nuclear Science and Technology, 6, pp.18-21, 2019
DOI:10.15669/pnst.6.18
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Energy and Angular Dependence of the Small-Type OSL Dosimeter in Nuclear Medicine Regions using Monte Carlo Simulation
Vergil Lorenzo E. Cruz, Tohru Okazaki, Hiroaki Hayashi, Yoshiki Mihara, Takashi Asahara, Natsumi Kimoto, Hiroki Okino, Yuki Kanazawa, Takuya Hashizume, Ikuo Kobayashi
Progress in Nuclear Science and Technology, 6, pp.34-38, 2019
DOI:10.15669/pnst.6.34
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Direct Radiation Dose Measurement of Rectum during High-Dose-Rate 192Ir Brachytherapy for Cervical Cancer Treatment
Emi Tomita, Hiroaki Hayashi, Takashi Asahara, Kanako Sakuragawa, Yasufumi Shitakubo, Hiroshi Saegusa, Hitoshi Ikushima, Yuki Kanazawa, Sota Goto, Tohru Okazaki, Takuya Hashizume, Vergil LE Cruz
Progress in Nuclear Science and Technology, 6, pp.39-42, 2019
DOI:10.15669/pnst.6.39
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Exposure dose measurement during diagnostic pediatric X-ray examination using an optically stimulated luminescence (OSL) dosimeter based on precise dose calibration taking into consideration variation of X-ray spectra
Takashi ASAHARA, Hiroaki HAYASHI, Sota GOTO, Emi TOMITA, Natsumi KIMOTO, Yoshiki MIHARA, Takumi ASAKAWA, Yuki KANAZAWA, Akitoshi KATSUMATA, Kosaku HIGASHINO, Kazuta YAMASHITA, Tohru OKAZAKI, Takuya HASHIZUME
Radiation Measurements, 119, pp.209-219, 2018
DOI: 10.1016/j.radmeas.2018.10.007
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Development of correction for signal-to-noise ratio using a T2* with improved Phase method
Natsuki Ikemitsu, Yuki Kanazawa, Yuki Matsumoto, Hiroaki Hayashi, Toshiaki Sasaki, Mitsuharu Miyoshi and Masafumi Harada
Journal of Computer Assisted Tomography, Vol.42, No.1, pp.117-123, 2018
DOI:10.1097/RCT.0000000000000644
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Pulsation and collimation during fluoroscopy to decrease radiation: a cadaver study
Kazuta Yamashita, Kosaku Higashino, Hiroaki Hayashi, Fumio Hayashi, Yoshihiro Fukui, Koichi Sairyo
JBJS Open Access, Vol.2, No.4, p.e0039, 2017
DOI:10.2106/JBJS.OA.17.00039
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Internal evaluation of impregnation treatment of waterlogged wood; relation between concentration of internal materials and relaxation time using magnetic resonance imaging
Yuki Kanazawa, Tetsuya Yamada, Aki Kido, Koji Fujimoto, Kyoko Takakura, Hiroaki Hayashi, Yasutaka Fushimi, Satoshi Kozawa, Koji Koizumi, Makiko Okuni, Naomi Ueda and Kaori Togashi
Magnetic Resonance Imaging, Vol.38, pp.196-201, 2017
DOI:10.1016/j.mri.2017.01.010
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Precise material identification method based on a photon counting technique with correction of the beam hardening effect in X-ray spectra
Kimoto Natsumi, Hiroaki Hayashi, Asahara Takashi, Mihara Yoshiki, Yuki Kanazawa, Tsutomu Yamakawa, Shuichiro Yamamoto, Masashi Yamasaki and Masahiro Okada
Applied Radiation and Isotopes, Vol.124, pp.16-26, 2017
DOI:10.1016/j.apradiso.2017.01.049
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Entrance surface dose measurements using a small OSL dosimeter with a computed tomography scanner having 320 rows of detectors
Kazuki Takegami, Hiroaki Hayashi, Kenji Yamada, Yoshiki Mihara, Natsumi Kimoto, Yuki Kanazawa, Kousaku Higashino, Kazuta Yamashita, Fumio Hayashi, Tohru Okazaki, Takuya Hashizume and Ikuo Kobayashi
Radiological Physics and Technology, Vol.10, No.1, pp.49-59, 2017
DOI:10.1007/s12194-016-0366-1
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Necessity of Direct Dose Measurement during Current X-ray Diagnosis, --- Our Approach Using a Small-type OSL Dosimeter ---
Hiroaki Hayashi, Yoshiki Mihara, Yuki Kanazawa, Emi Tomita, Sota Goto, Kazuki Takegami, Tohru Okazaki, Takuya Hashizume and Vergil Estacio Lorenzo Cruz
Medical Research Archives, Vol.5, No.2, pp.1-20, 2017
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Visualization of magnetic transfer effect in polyethylene glycol impregnated waterlogged wood
Yuki Kanazawa, Tetsuya Yamada, Aki Kido, Koji Fujimoto, Kyoko Takakura, Hiroaki Hayashi, Yasutaka Fushimi, Satoshi Kozawa, Koji Koizumi, Makiko Okuni, Naomi Ueda and Kaori Togashi
Applied Magnetic Resonance, Vol.48, No.2, pp.125-134, 2017
DOI:10.1007/s00723-016-0850-0
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Uncertainty evaluation of fluorescent nuclear track detectors (FNTDs) for neutron dose measurements
Takuya Hashizume, Tohru Okazaki, Toshiya Sanami, Masayuki Hagiwara, Hideaki Monjushiro, Hiroaki Hayashi and Ikuo Kobayashi
Radiation Measurements, 106, pp.602-606, 2017
DOI:10.1016/j.radmeas.2017.03.044
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Uncertainty evaluation of absorbed dose measurements by means of small-type OSL dosimeter for radiotherapeutic X-ray region
Masahide Tominaga, Hiroaki Hayashi, Akinori Matsumoto, Natsumi Kimoto, Tohru Okazaki, Takuya Hashizume and Ikuo Kobayashi
Medical Imaging and Information Sciences, Vol.33, No.2, pp.32-37, 2016
DOI:10.11318/mii.33.32
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Estimation of identification limit for a small-type OSL dosimeter on the medical images by measurement of X-ray spectra
Kazuki Takegami, Hiroaki Hayashi, Hiroki Okino, Natsumi Kimoto, Itsumi Maehata, Yuki Kanazawa, Tohru Okazaki, Takuya Hashizume and Ikuo Kobayashi
Radiological Physics and Technology, Vol.9, No.2, pp.282-292, 2016
DOI:10.1007/s12194-016-0362-5
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Basic characteristics of nanoDot OSL dosimeter for diagnostic X-ray
Tohru Okazaki, Hiroaki Hayashi, Kazuki Takegami, Hiroki Okino, Natsumi Kimoto, Itsumi Maehata and Ikuo Kobayashi
Journal of Radiation Protection and Research, Vol.41, No.3, pp.229-236, 2016
DOI:10.14407/jrpr.2016.41.3.229
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Simple noise reduction for diffusion weighted images
Yuto Konishi, Yuki Kanazawa, Takatoshi Usuda, Yuki Matsumoto, Hiroaki Hayashi, Tsuyoshi Matsuda, Junji Ueno and Masafumi Harada
Radiological Physics and Technology, Vol.9, No.2, pp.221-226, 2016
DOI:10.1007/s12194-016-0350-9
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On the iteration of coincidence summing correction for determination of gamma-ray intensities
Yosuke Shima, Hiroaki Hayashi, Yasuaki Kojima, Ryouta Jyousyou and Michihiro Shibata
Applied Radiation and Isotopes, Vol.109, pp.535-538, 2016
DOI:10.1016/j.apradiso.2015.11.035
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Energy dependence measurement of small-type optically stimulated luminescence (OSL) dosimeter by means of characteristic X-rays induced with general diagnostic X-ray equipment
Kazuki Takegami, Hiroaki Hayashi, Hiroki Okino, Natsumi Kimoto, Itsumi Maehata, Yuki Kanazawa, Tohru Okazaki, Takuya Hashizume and Ikuo Kobayashi
Radiological Physics and Technology, Vol.9, No.1, pp.99-108, 2016
DOI:10.1007/s12194-015-0339-9
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Practical method for determination of air-kerma by using an ionization chamber toward the construction of secondary X-ray field to be used in clinical examination rooms
Itsumi Maehata, Hiroaki Hayashi, Natsumi Kimoto, Kazuki Takegami, Hiroki Okino, Yuki Kanazawa and Masahide Tominaga
Radiological Physics and Technology, Vol.9, No.2, pp.193-201, 2016
DOI:10.1007/s12194-016-0352-7
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Clinical Approach of T1-mapping for Hemodynamic Analysis
Yuki Kanazawa, Hiroaki Hayashi and Masafumi Harada
Medical Imaging and Information Sciences, Vol.32, No.4, pp.xxvi-xxix, 2015
DOI:10.11318/mii.32.xxvi
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Practical calibration curve of small-type optically stimulated luminescence (OSL) dosimeter for evaluation of entrance-skin dose in the diagnostic X-ray region
Kazuki Takegami, Hiroaki Hayashi, Hiroki Okino, Natsumi Kimoto, Itsumi Maehata, Yuki Kanazawa, Tohru Okazaki and Ikuo Kobayashi
Radiological Physics and Technology, Vol.8, No.2, pp.286-294, 2015
DOI:10.1007/s12194-015-0318-1
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β- Decay of 150Ce to Odd Odd 150Pr
Yasuaki KOJIMA, Kazuto KOSUGA, Yosuke SHIMA, Akihiro TANIGUCHI, Hiroaki Hayashi and Michihiro SHIBATA :
Journal of the Physical Society of Japan, Vol.84, pp.054201-1-8, 2015
DOI:10.7566/JPSJ.84.054201
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Procedure to measure angular dependences of personal dosimeters by means of diagnostic X-ray equipment
Hiroaki Hayashi, Kazuki Takegami, Hiroki Okino, Kohei Nakagawa, Tohru Okazaki and Ikuo Kobayashi
Medical Imaging and Information Sciences, Vol.32, No.1, pp.8-14, 2015
DOI:10.11318/mii.32.8
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診断用X線撮影装置を用いたCdTe検出器の応答関数の実測とモンテカルロシミュレーションコードの評価
沖野 啓樹, 林 裕晃, 中川 滉平, 竹上 和希
日本放射線技術学会雑誌, Vol.70, No.12, 1381-1391頁, 2014年
DOI:10.6009/jjrt.2014_JSRT_70.12.1381
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Optically Stimulated Luminescence (OSL)線量計のアニーリング装置の製作
中川 滉平, 林 裕晃, 沖野 啓樹, 竹上 和希, 岡崎 徹, 小林 育夫
日本放射線技術学会雑誌, Vol.70, No.10, 1135-1142頁, 2014年
DOI:10.6009/jjrt.2014_JSRT_70.10.1135
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Computed radiographyシステムの入出力特性を取得するための改良型マルチスリット装置の製作, --- ヒール効果の影響の補正と高管電圧実験への適用 ---
前畑 伊採, 林 裕晃, 竹上 和希, 氏田 将平, 紀本 夏実, 小西 有貴, 福田 郁磨
日本放射線技術学会雑誌, Vol.70, No.9, 867-876頁, 2014年
DOI:10.6009/jjrt.2014_JSRT_70.9.867
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Determination of full-energy peak efficiency at the center position of a through-hole-type clover detector between 0.05 and 3.2 MeV by source measurements and Monte Carlo simulations
Y Shima, Hiroaki Hayashi, Y Kojima and M Shibata
Applied Radiation and Isotopes, Vol.91, pp.97-103, 2014
DOI:10.1016/j.apradiso.2014.05.008
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診断領域における散乱X線含有率のコリメータを用いた間接測定法
林 裕晃, 竹上 和希, 小西 有貴, 福田 郁磨
日本放射線技術学会雑誌, Vol.70, No.3, 213-222頁, 2014年
DOI:10.6009/jjrt.2014_JSRT_70.3.213
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薄膜の入射窓を有する霧箱の開発とX線撮影装置及び非密封放射性同位元素を用いた初学者に対する実習の提案
小西 有貴, 林 裕晃, 竹上 和希, 福田 郁磨, 上野 淳二
日本放射線技術学会雑誌, Vol.70, No.1, 26-33頁, 2014年
DOI:10.6009/jjrt.2014_JSRT_70.1.26
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Measurements of High-energy Excited States and Gamma-rays of Fission Products with a 4-Pai Clover Detector
Y. Shima, Y. Kojima, Hiroaki Hayashi, A. Taniguchi and M. Shibata
Nuclear Data Sheets, Vol.120, pp.30-32, 2014
DOI:10.1016/j.nds.2014.06.133
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Half-life Measurement of Excited Levels in Fission Products around Mass Number 150
Y. Kojima, Y. Shima, Hiroaki Hayashi, A. Taniguchi and M. Shibata
Nuclear Data Sheets, Vol.120, pp.52-55, 2014
DOI:10.1016/j.nds.2014.07.004
-
OSL線量計の繰り返し読み取りによる高精度測定
林 裕晃, 中川 滉平, 沖野 啓樹, 竹上 和希, 岡崎 徹, 小林 育夫
医用画像情報学会雑誌, Vol.31, No.2, 28-34頁, 2014年
DOI:10.11318/mii.31.28
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Performance of a total absorption clover detector for Qbeta measurements of neutron-rich nuclei far from the beta-stability line
Hiroaki Hayashi, Michihiro Shibata, Masato Asai, Akihiko Osa, Tukada K Sato, Mitsuo Koizumi, Atsushi Kimura and Masumi Oshima
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol.747, pp.41-51, 2014
DOI:10.1016/j.nima.2014.02.012
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診断用X線撮影装置のフィルタ用ガイドを利用したナロウビーム発生用多段コリメータの開発と実習装置の改良
竹上 和希, 林 裕晃, 小西 有貴, 福田 郁磨
医用画像情報学会雑誌, Vol.30, No.4, 101-107頁, 2013年
DOI:10.11318/mii.30.101
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輝尽性蛍光体プレートに対する入出力特性の測定のための一体型マルチスリット装置の製作
紀本 夏実, 林 裕晃, 前畑 伊採, 野々宮 泉, 竹上 和希, 小西 有貴, 氏田 将平, 福田 郁磨
日本放射線技術学会雑誌, Vol.69, No.10, 1165-1171頁, 2013年
DOI:10.6009/jjrt.2013_JSRT_69.10.1165
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診断用X線撮影装置を用いたCdTe検出器のエネルギー校正のための実験装置の開発
福田 郁磨, 林 裕晃, 竹上 和希, 小西 有貴
日本放射線技術学会雑誌, Vol.69, No.9, 952-959頁, 2013年
DOI:10.6009/jjrt.2013_JSRT_69.9.952
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診断領域における散乱X線の可視化装置の製作と実習の提案
岸田 弥奈, 林 裕晃, 窪薮 友美, 竹上 和希, 井上 直, 花光 宏樹, 西原 貞光
日本放射線技術学会雑誌, Vol.69, No.5, 500-507頁, 2013年
DOI:10.6009/jjrt.2013_JSRT_69.5.500
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診断用X線装置を用いた霧箱実験の提案とシミュレーションコードを援用した解析
林 裕晃, 花光 宏樹, 西原 貞光, 上野 淳二, 三好 弘一
日本放射線技術学会雑誌, Vol.69, No.4, 386-392頁, 2013年
DOI:10.6009/jjrt.2013_JSRT_69.4.386
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セパレータを有する箔検電器の製作と診断用X線装置を用いた実験の提案
松浦 貴明, 林 裕晃, 花光 宏樹, 西原 貞光
日本放射線技術学会雑誌, Vol.69, No.3, 239-243頁, 2013年
DOI:10.6009/jjrt.2013_JSRT_69.3.239
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Relative intensities of prompt γ-rays from the 35Cl(n,γ)36Cl reaction with thermal neutrons as secondary γ-ray intensity standards
Michihiro Shibata, Akinori Tojo, Itaru Miyazaki, Masataka Furuta, Hiroaki Hayashi, Yasuaki Kojima, Yosuke Shima and Akihiro Taniguchi
Applied Radiation and Isotopes, Vol.73, pp.60-67, 2013
DOI:10.1016/j.apradiso.2012.11.008
-
GM計数管を用いたピンホールカメラの開発に向けた基礎研究
竹上 和希, 林 裕晃, 福田 郁磨, 小西 有貴, 花光 宏樹, 橋詰 拓弥, 村上 淳, 三谷 聡
日本放射線技術学会雑誌, Vol.69, No.9, 994-951頁, 2013年
DOI:10.6009/jjrt.2013_JSRT_69.9.944
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動的マルチスリットを用いたコンピューティッドラジオグラフィシステムの特性曲線の取得
竹上 和希, 林 裕晃, 紀本 夏実, 前畑 伊採, 野々宮 泉, 福田 郁磨, 小西 有貴
医用画像情報学会雑誌, Vol.30, No.3, 53-56頁, 2013年
DOI:10.11318/mii.30.53
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Ground-state configuration of the N = 157 nucleus 259No
M. Asai, K. Tsukada, Minoru Sakama, H. Haba, T. Ichikawa, Y. Ishii, A. Toyoshima, T. Ishii, I. Nishinaka, Y. Nagame, Y. Kasamatsu, M. Shibata, Y. Kojima and Hiroaki Hayashi
Physical Review C, Nuclear Physics, Vol.87, No.1, pp.014332-1-6, 2013
DOI:10.1103/PhysRevC.87.014332
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Digital radiographyシステムで発生した黒点の放射能の推定, --- 輝尽性蛍光体板表面に直接付着した低濃度放射性同位元素起源の黒点の解析 ---
林 裕晃, 西原 貞光, 高志 智, 花光 宏樹, 森 美智子, 三好 弘一, 小沼 洋治
日本放射線技術学会雑誌, Vol.68, No.11, 1467-1473頁, 2012年
DOI:10.6009/jjrt.2012_JSRT_68.11.1467
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診療画像中に発生した黒点の原因となる放射性同位元素の付着部位に関する推定実験
西原 貞光, 林 裕晃, 花光 宏樹, 森 美智子
日本放射線技術学会雑誌, Vol.68, No.10, 1307-1313頁, 2012年
DOI:10.6009/jjrt.2012_JSRT_68.10.1307
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X線漏洩源の特定のための円環状コリメータカメラの開発
林 裕晃, 花光 宏樹, 西原 貞光, 村上 淳
日本放射線安全管理学会誌, Vol.11, No.1, 44-50頁, 2012年
DOI:10.11269/jjrsm.11.44
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X線用のピンホールカメラに用いるコリメータ径の最適化と画像周辺部での検出効率低下の補正手法の提案
林 裕晃, 谷内 翔, 神谷 尚武, 西原 貞光
日本放射線安全管理学会誌, Vol.11, No.1, 51-59頁, 2012年
DOI:10.11269/jjrsm.11.51
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イメージングプレートの放射能汚染による黒点計数法の開発
林 裕晃, 西原 貞光, 小沼 洋治
日本放射線技術学会雑誌, Vol.68, No.5, 545-553頁, 2012年
DOI:10.6009/jjrt.2012_JSRT_68.5.545
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輝尽性蛍光体プレートを用いて取得したX線画像上の黒点発生の解明に向けたモンテカルロシミュレーション, --- 原子力発電所事故で飛散した核分裂収率の大きい放射性同位元素の影響 ---
林 裕晃, 西原 貞光, 谷内 翔, 神谷 尚武
医用画像情報学会雑誌, Vol.29, No.1, 7-11頁, 2012年
DOI:10.11318/mii.29.7
-
輝尽性蛍光体プレートを用いた多数点取得実験におけるフェーディング補正手法の提案
林 裕晃, 神谷 尚武, 谷内 翔, 西原 貞光, 高志 智
医用画像情報学会雑誌, Vol.29, No.1, 1-6頁, 2012年
DOI:10.11318/mii.29.1
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X線検出器(イメージングプレート:IP)に付着した放射性同位元素の除染
小沼 洋治, 林 美智子, 林 裕晃, 西原 貞光
日本放射線技術学会雑誌, Vol.68, No.3, 277-282頁, 2012年
DOI:10.6009/jjrt.2012_JSRT_68.3.277
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輝尽性蛍光体プレートを用いたピンホールカメラの開発と散乱X線分布および可視光画像の撮影
林 裕晃, 谷内 翔, 神谷 尚武, 西原 貞光, 富永 正英
日本放射線技術学会雑誌, Vol.68, No.3, 307-311頁, 2012年
DOI:10.6009/jjrt.2012_JSRT_68.3.307
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円環コリメータカメラを用いた漏洩X線源の同定手法
林 裕晃, 村上 淳, 花光 宏樹, 西原 貞光, 武田 俊一
日本放射線安全管理学会誌, Vol.12, No.1, 30-35頁, 2012年
DOI:10.11269/jjrsm.12.30
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EGS5コードを用いた診断用X線スペクトルの実用的な計算手法
林 裕晃, 福本 晃, 花光 宏樹, 西原 貞光, 神谷 尚武
医用画像情報学会雑誌, Vol.29, No.3, 62-67頁, 2012年
DOI:10.11318/mii.29.62
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Emission probabilities of some intense prompt γ rays of 24Na, 28Al, 52V, 56Mn, 60Co, 142Pr, 187W and 198Au with thermal neutron capture determined using γ rays following β decay
Michihiro Shibata, Itaru Miyazaki, Hiroaki Hayashi, Akinori Tojo, Masataka Furuta, Yasuaki Kojima, Akihiro Taniguchi and Kiyoshi Kawade
Annals of Nuclear Energy, Vol.43, pp.106-113, 2012
DOI:10.1016/j.anucene.2012.01.005
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X線検出器(イメージングプレート)の放射能汚染に対する効果的な除染方法の提案
西原 貞光, 林 裕晃
日本放射線技術学会雑誌, Vol.67, No.8, 912-915頁, 2011年
DOI:10.6009/jjrt.67.912
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A spectrometer for lifetime determination by β-γ-γ delayed coincidence technique at KUR-ISOL
Y. Kojima, Hiroaki Hayashi, M. Shibata, S. Endo, K. Shizuma and A. Taniguchi
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol.659, No.1, pp.193--197, 2011
DOI:10.1016/j.nima.2011.08.005
-
Systematics for (n,2n) excitation functions in the neutron energy between 13.4 and 14.9 MeV
Hiroaki Hayashi, Hitoshi Sakane, Michihiro Shibata, Kiyoshi Kawade, Yoshimi Kasugai, Yujiro Ikeda and Toshiyuki Iida
Annals of Nuclear Energy, Vol.38, No.2-3, pp.637-646, 2010
DOI:10.1016/j.anucene.2010.09.005
-
Practical Qβ analysis method based on the Fermi-Kurie plot for spectra measured with total absorption BGO detector
Hiroaki Hayashi, Yasuaki Kojima, Michihiro Shibata and Kiyoshi Kawade
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol.613, No.1, pp.79-89, 2009
DOI:10.1016/j.nima.2009.10.155
-
Qβ-measurements with a total absorption detector composed of through-hole HPGe detector and anti-Compton BGO detector
Hiroaki Hayashi, Michihiro Shibata, Itaru Miyazaki, Osamu Suematsu, Yasuaki Kojima, Kiyoshi Kawade and Akihiro Taniguchi
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol.606, No.3, pp.484-489, 2009
DOI:10.1016/j.nima.2009.04.047
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Measurements of activation cross section of (n,p) and (n,α) reactions in the energy range of 3.5-5.9 MeV using a deuterium gas target
Masataka Furuta, Toshiaki Shimizu, Hiroaki Hayashi, Itaru Miyazaki, Hiroshi Yamamoto, Michihiro Shibata and Kiyoshi Kawade
Annals of Nuclear Energy, Vol.35, No.9, pp.1652-1662, 2008
DOI:10.1016/j.anucene.2008.02.010
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Qβ measurements of 158,159Pm, 159,161Sm, 160-165Eu, 163Gd and 166Tb using a total absorption BGO detector
Hiroaki Hayashi, Y. Akita, O. Suematsu, M. Shibata, M. Asai, T. K. Sato, S. Ichikawa, I. Nishinaka, Y. Nagame, A. Osa, K. Tsukada, T. Ishii, Y. Kojima and A. Taniguchi
The European Physical Journal A - Hadrons and Nuclei, Vol.34, No.4, pp.363-370, 2008
DOI:10.1140/epja/i2006-10522-9
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Precise Intensity Measurements in the 14N(n,γ)15N Reaction as a γ-Ray Intensity Standard up to 11 MeV
Itaru Miyazaki, Hitoshi Sakane, Hirokazu Takayama, Masafumi Kasaishi, Akinori Tojo, Masataka FURUTA, Hiroaki Hayashi, Osamu Suematsu, Hiromichi Narasaki, Toshiaki Shimizu, Michihiro Shibata, Kiyoshi Kawade, Akihiro Taniguchi and Hideo Harada
Journal of Nuclear Science and Technology, Vol.45, No.6, pp.481-486, 2007
DOI:10.1080/18811248.2008.9711871
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