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臼井桂介（ウスイケイスケ）

研究テーマ	画像処理技術を用いた放射線治療の高精度化、AIを用いた放射線技術学
研究業績（論文）	【2023年】 “Evaluation of motion artefact reduction depending on the artefacts’ directions in head MRI using conditional generative adversarial networks, K Usui, I Muro, S Shibukawa, M Goto, K Ogawa, Y Sakano, S Kyogoku, H Daida. Sci Rep 13, 8526, 2023. “シミュレーションデータを用いた条件付き敵対生成ネットワークによるスパース投影CTの画質改善” 神山彩絵、臼井桂介、有田晃大、後藤政実、坂野康昌、京極伸介、代田浩之. 順天堂保健医療学雑誌, in press 2023. “条件つき敵対生成ネットワークによる頭部MRIのモーションアーチファクトの低減” 有田晃大、臼井桂介、神山彩絵、室伊三男、後藤政実、坂野康昌、京極伸介、代田浩之. 順天堂保健医療学雑誌, in press 2023. 【2022年】 “Development of deep-inspiration breath-hold system that monitors the position of the chest wall using infrared rangefinder, M Oshima, N Shimaka, K Usui, et.al. Journal of Radiation Research, 64:P. 171-179, 2022. “Development and Evaluation of Jaw Position Detection Method in Jaw-tracking Delivery Using an Electronic Portal Imaging Device Cine Mode" T Kawabata, K Sasai, K Usui, K Sasai. Juntendo Medical Journal, 68:P. 590-598, 2022. “Multi-Institutional Study of End-to-End Dose Delivery Quality Assurance Testing for Image-Guided Brachytherapy Using a Gel Dosimeter”H Tachibana, Y Watanabe, K Usui, et.al. Brachytherapy, 21:P.956-967, 2022. “A cycle generative adversarial network for improving the quality of four‑dimensional cone‑beam computed tomography images”Usui K, Ogawa K, Goto M, Sakano Y, Kyougoku S, Daida H. Radiat Oncol 17, 69, 2022, https://doi.org/10.1186/s13014-022-02042-1 “Improving the accuracy of motion quantification using area detector computed tomography for real-time tumor-tracking irradiation in stereotactic ablative radiotherapy” K Suzuki, K Usui, K Sasai. Med Dosim., 2:P.166-172, 2022. “Semiautomatic Treatment Planning for the Field-in-field Technique in Whole Brain Irradiation," H Watanabe, K Sasai, K Usui, K Sasai. Juntendo Medical Journal, 68:P.375-386, 2022. “Image Quality Improvement for Chest Four-Dimensional Cone-Beam Computed Tomography by Cycle-Generative Adversarial Network”K. Usui, K. Ogawa, M. Goto, Y. Sakano, S. Kyogoku, H. Daida., Med Imag Tech., 40:P.37-47, 2022. 【2021年】 “Comparison of Moderate Hypofractionated Volumetric-Modulated Arc Therapy Plans With and Without Flattening Filter for Localized Prostate Cancer”Yosuke Takakusagi, Keisuke Usui, Nobutaka Mizoguchi, Jun Nagatsuka, Takeshi Hikage, Yasuhiko Kodama, Takatomo Ezura, Terufumi Kusunoki, Yukio Oizumi. Cureus. 2021 Sep 16;13(9):e18034. doi:10.7759/cureus.18034. eCollection 2021 “Quantitative evaluation of deep convolutional neural network-based image denoising for low-dose computed tomography”K. Usui, K. Ogawa, M. Goto, Y. Sakano, S. Kyogoku, H. Daida. Vis Comput Ind Biomed Art, Jul 25;4(1):21. doi: 10.1186/s42492-021-00087-9. 2021 “Cycle-Generative Adversarial Network-Based Image Correction of 4-Dimensional Cone-Beam Computed Tomography for Lung Cancer Adaptive Radiation Therapy” K. Usui, K. Ogawa, M. Goto, Y. Sakano, N. Shikama, S. Kyogoku, K. Sasai, H. Daida. International Journal of Radiation Oncology • Biology • Physics, Vol. 111, Issue 3, E129, 2021 “The effect of rotational setup errors in total body irradiation using helical tomotherapy on dose distribution” A. Isobe, K. Usui, N. Hara, K. Sasai. J Appl Clin Med Phys, pp.1-10, DOI: 10.1002/acm2.13271, 2021 “Low dose CT denoising using a pre-trained convolutional neural network” K. Usui, A. Isobe, K. Ogawa, Juntendo Health Science Journal, 2(1): 13-18, 2021 【2020年】 “Dosimetric evaluation of the uncorrectable rotational setup error in total body irradiation using helical tomotherapy system” Akira Isobe, Keisuke Usui, Haruka Katou, Junpei Ohbuchi, Naoya Hara, Keisuke Sasai、Proceedings of 20thAsia-Oceania Congress on Medical Physics (AOCMP), pp.356-359, 2020 “Quantitative evaluation of deep convolutional neural network based denoising for ultra-low-dose CT” Keisuke Usui, Kentarou Suzuki, Akira Isobe, Kazumi Murata, Koichi Ogawa、Proceedings of 20thAsia-Oceania Congress on Medical Physics (AOCMP), pp.315-318, 2020 “Analysis of Correlation Between Breast Surface Position and Internal Organ Deformation Using Deep-Inspiration Breath Holding for Left-Sided Breast Irradiation” K. Usui, M. Oshima, A. Isobe, T. Kawamoto, N. Shikama, K. Sasai. International Journal of Radiation Oncology • Biology • Physics, Vol. 108, Issue 3, e287, 2020 “Reducing contrast dose using virtual monoenergetic imaging for aortic CTA” R. Yoshida, K. Usui, Y. Katsunuma, H. Honda, K. Hatakeyama. J Appl Clin Med Phys, 21(8):272-277, 2020 “Improving the imaging of thoracic tumors using four-dimensional cone-beam CT with combined shared projection data” K. Usui, K. Ogawa. Juntendo Health Science Journal, 1(1):9-16, 2020 【2019年】 “Clinical Evaluation of a Rotational Set-up Correction Device for Multiple Brain Metastases Using Single-Isocenter Stereotactic Radiation Therapy” K. Usui, A.Isobe, N.Hara, T.Kawamoto, M. Oshima, N. Shikama, K. Sasai. International Journal of Radiation Oncology • Biology • Physics, Vol. 105, Issue 1, e775, 2019 “待ち伏せ体幹部定位照射における治療計画時と照射時の金マーカ位置の相違に関する検討” 大島理規, 鹿間直人, 川本晃史, 宮澤一成, 杉本聡, 臼井桂介, 高津淳, 笹井啓資. 臨床放射線, 2019; 64巻: pp.1057-1061. “Development of a rotational set-up correction device for stereotactic head radiation therapy: A performance evaluation” K Usui, A Isobe, N Hara, T Muroi, O Sajiki, K Ogawa, N Shikama, K Sasai. J Appl Clin Med Phys, vol.20, Issue 6, pp 206-212, 2019 “Patient organ doses from megavoltage computed tomography delivery with a helical tomotherapy unit using a general treatment planning system” Nagata H, Sugimoto S, Hongo H, Hashimoto H, Sato Y, Kawabata T, Watanabe H, Inoue T, Usui K, Kurokawa C, Sasai K. J Radiat Res. pp. 1-11, 2019 【2018年】 “Appropriate treatment planning method for field joint dose in total body irradiation using helical tomotherapy” K Usui, A Isobe, N Hara, N Shikama, K Sasai, K Ogawa. Med Dosim, 44(4):344-353, 2018 “Dosimetric and Radiobiological Evaluation of Delivered Dose Distribution with Intra-Fractional Motion in Prostate Stereotactic Radiation Therapy Treatments Using VMAT and Helical Tomotherapy” K. Usui, J. Takatsu, K. Ogawa, N. Shikama, K. Sasai. International Journal of Radiation Oncology • Biology • Physics, Vol. 102, Issue 3, e559, 2018 “Development of a Rotational Set-Up Correction Device for Head Stereotactic Radiation Therapy” K Usui, N Hara, A Isobe, T Muroi, O Sajiki, K Ogawa, N Shikama, K Sasai, Medical physics, Vol.45, e413, 2018 "Effect of region extraction and assigned mass-density values on the accuracy of dose calculation with magnetic resonance-based volumetric arc therapy planning” K. Usui, K. Sasai, K. Ogawa, Radiol Phys　Technol., vol.11, Issue 2, pp 174-183, 2018 【2017年】 "Improvement of Dose Calculation with Scattered Photon-Corrected kV Cone-Beam CT Image Using the Kernel Deconvolution Method" K. Usui, S. Kubota, K. Sasai, K. Ogawa. International journal of radiation oncology・ biology・physics, Vol.99, Issue 2, E730, 2017 “A Layered Collimator for Radiographic Imaging” I Kusakari, K Ogawa, Usui K, IEEE Nuclear Science Symposium and Medical Imaging Conference, CD-ROM, 2017. "Analysis of Dose Calculation Accuracy in Cone Beam Computed Tomography with Various Amount of Scattered Photon Contamination" Usui, K., Ogawa, K. and Sasai, K. (2017) International Journal of Medical Physics, Clinical Engineering and Radiation Oncology, 6, 233-251. doi: 10.4236/ijmpcero.2017.63022. "呼吸同期PET/CTを用いた横隔膜境界における肉眼的腫瘍体積の算出能の評価" 中澤脩人、梅田拓郎、宮司典明、三輪健太、我妻慧、茂木一樹、滝口智洋、寺内隆司、小泉満、臼井桂介、笹井啓資. 日放技学誌 2017; 73(8): 617-625. 【2016年】 “Effect of region extraction and assigned electron density value on the accuracy of dose calculation with MRI-based VMAT planning” Usui K, Inoue T, Kurokawa C, Sugimoto S, Sasai K, Ogawa K, Medical physics international journal, Vol.4, pp.206, 2016 “Analyzing the effect of scattered photons on cone beam computed tomography-based adaptive radiation therapy” K. Usui, T. Inoue, C. Kurokawa, S. Sugimoto, K. Sasai, K. Ogawa. International journal of radiation oncology・biology・physics, Vol.96, Issue 2, E635, 2016 "Monte carlo study on a cone-beam computed tomography using a cross-type carbon fiber antiscatter grid”K Usui,T Inoue,C Kurokawa,S Sugimoto,K Sasai,K Ogawa,Medical physics, Vol.43,3422,2016 “モンテカルロ法によるコーンビームCTへのクロス型カーボングリッドの有効性の検証” 臼井桂介,笹井啓資,尾川浩一,他.8名中1番目,第35回日本医用画像工学会大会,CD-ROM,7pages,2016. “Limited impact of setup and range uncertainties,breathing motion and interplay effects in robustly optimized intensity mofdulated proton therapy for stage III non-small cell lung cancer” T Inoue,J Widder,K Usui et al.International journal of radiation oncology,biology,physics,Vol.96,pp.661-669,2016 "赤外線モニタの信号波形が四次元コーンビームCTの標的画像へ与える影響" 臼井桂介，原直哉，礒邉哲，井上達也，黒河千恵，杉本聡，笹井啓資，尾川浩一，日放技学誌 2016; 72(6): 469-479. 【2015年】 “Visualization of a Target Positions Using the 4 Dimensional Cone-beam CT Image Reconstruction with the Extracorporeal Infrared Monitor，” Keisuke Usui, Naoya Hara, Tatsuya Inoue, Toru Kawabata, Hironori Nagata, Chie Kurokawa, Satoru Sugimoto, Keisuke Sasai, Koichi Ogawa,IEEE Nuclear Science Symposium and Medical Imaging Conference, CD-ROM, 2015. “体外式赤外線モニタを利用した放射線治療用コーンビームCTの4次元画像再構成，” 臼井桂介，原直哉，礒邉哲，井上達也，黒河千恵，杉本聡，笹井啓資，尾川浩一，第34回日本医用画像工学会大会,CD-ROM,9 pages,2015. 【2014年】 “放射線治療用イメージングシステムにおける動きを伴う標的に対するCBCT画像再構成，”臼井桂介，黒河千恵，杉本聡，株木重人，国枝悦夫，笹井啓資，尾川浩一，Med Imag Tech.,vol.32,no.2,pp.132-142,2014. “動く標的のモーションアーチファクトに対するkV-CBCTのデータ取得条件の最適化,”臼井桂介，黒河千恵，杉本聡，石倉聡，笹井啓資，尾川浩一，第33回日本医用画像工学会大会,CD-ROM,6pages,2014. "An effect of the data acquisition conditions for the moving tumor affecting to the reconstruction image with the kilo-voltage-CBCT” Usui K, Kurokawa C, Sugimoto S, Sasai K, Ogawa K, Japanese Journal of Medical Physics, vol.34, pp.46,2014. 【2013年】 “適応的放射線治療のためのCBCT画像を用いた放射線治療計画の評価，”　臼井桂介，国枝悦夫，尾川浩一，Med Imag Tech.,vol.31,no.4,　pp.231-239,2013. "Dose calculation with a cone beam CT image in image-guided radiation therapy,” Usui K, Ichimaru Y, Okumura Y, Murakami K, Seo M, Kunieda E, Ogawa K, Radiol Phys　Technol.,vol.6,pp.107-114,2013. "CBCT image reconstruction of a moving target with an on-board imaging system for radiation therapy,” Usui K, Kabuki S, Kurokawa C, Sugimoto S, Sasai K, Kunieda E, Ogawa K, Conf. Record on IEEE Nuclear Science Symposium and Medical Imaging Conference, doi:10.1109/NSSMIC.2013.6829337,2013. "A study of 4D CBCT image reconstruction using detection of the target position from 2D projection images,” Usui K, Hiroki T, Fujita K, Kabuki S, Kunieda E, Ogawa K, International Journal of Radiation Oncology Biology Physics,vol.87,no.25,S702,2013. "The effect of region extraction accuracy on the dose calculation with CBCT images combined with MSCT images,” Usui K, Kunieda E, Ogawa K, Annual Meeting on European Congress of Radiology,doi:10.1594/ecr2013/C-0648,2013. “動態位置の時相情報に基づいた4D CBCT画像再構成の基礎検討，”臼井桂介，黒河千恵，杉本聡，株木重人，国枝悦夫，笹井啓資，尾川浩一，第32回日本医用画像工学会大会,CD-ROM,7pages,2013. "Basic study of 4D CBCT reconstruction using the detection of the target position from 2D projection images,” Usui K, Hiroki T, Fujita K, Kabuki S, Kunieda E, Ogawa K, Japanese Journal of Medical Physics,vol.33,pp.47,2013. 【2012年】 "Motion detection system with GPU acceleration for stereotactic radiosurgery,” Yamakawa T, Ogawa K, Iyatomi H, Kunieda K, Usui K, Shigematsu N, Med Imag Tech.,vol.30, no.5,pp.268-2278,2012. "Feasibility of dose calculation using combined information of cone-beam and multi-slice CT images,” Usui K, Kunieda E, Ogawa K, Medical Physics,vol.39,3675,2012. "Evaluation on pixel value conversion methods for dose calculation with kilo-voltage cone beam CT images,” Usui K, Kihara A, Ichimaru Y, Okumura Y, Murakami M, Seo M, Kunieda E, Ogawa K, World Congress on Medical Physics and Biomedical Engineering, IFMBE Proceedings,vol.39,pp.1783-1786,2012. “CBCTとMSCTの合成画像に対する領域抽出精度が線量計算に与える影響について，”臼井桂介，広木智之，藤田健太，一丸恭伸，奥村康弘，国枝悦夫，尾川浩一，医学物理,vol.33,pp.71-72,2012. “CBCT画像による線量計算を目的とした画素値変換法の検討,”臼井桂介, 木原彩佳, 国枝悦夫, 尾川浩一, 医学物理,vol.32,pp.144,2012. “前立腺IMRTにおける治療計画線量指標の最適化に関する検討,” 木原彩佳，臼井桂介，村上克己，瀬尾誠，国枝悦夫，医学物理,vol.32, pp.147,2012. 【2011年】 "Feasibility of kV-CBCT images for the dose calculation in image-guided radiotherapy,” Usui K, Kihara A, Ichimaru Y, Okumura Y, Murakami K, Kunieda E, Ogawa K, Japanese Journal of Medical Physics,vol.31,no.4,213,CD-R(D8-1),2011. “東海大学におけるIMRT線量検証のまとめ Map CHECKによるγ解析結果の傾向,”臼井桂介，国枝悦夫，臨床放射線,vol.56,pp.1164-1165,2011. “前立腺IMRTにおける位置照合方法の違いによるPTVマージンの検討,”　臼井桂介，木原彩佳，一丸恭伸，宗像浩二，余語克紀，秋庭健志，国枝悦夫, 医学物理,vol.31,pp.126,2011.

研究テーマ

画像処理技術を用いた放射線治療の高精度化、AIを用いた放射線技術学

研究業績（論文）

【2023年】
“Evaluation of motion artefact reduction depending on the artefacts’ directions in head MRI using conditional generative adversarial networks, K Usui, I Muro, S Shibukawa, M Goto, K Ogawa, Y Sakano, S Kyogoku, H Daida. Sci Rep 13, 8526, 2023.

“シミュレーションデータを用いた条件付き敵対生成ネットワークによるスパース投影CTの画質改善” 神山彩絵、臼井桂介、有田晃大、後藤政実、坂野康昌、京極伸介、代田浩之. 順天堂保健医療学雑誌, in press 2023.

“条件つき敵対生成ネットワークによる頭部MRIのモーションアーチファクトの低減” 有田晃大、臼井桂介、神山彩絵、室伊三男、後藤政実、坂野康昌、京極伸介、代田浩之. 順天堂保健医療学雑誌, in press 2023.

【2022年】
“Development of deep-inspiration breath-hold system that monitors the position of the chest wall using infrared rangefinder, M Oshima, N Shimaka, K Usui, et.al. Journal of Radiation Research, 64:P. 171-179, 2022.

“Development and Evaluation of Jaw Position Detection Method in Jaw-tracking Delivery Using an Electronic Portal Imaging Device Cine Mode" T Kawabata, K Sasai, K Usui, K Sasai. Juntendo Medical Journal, 68:P. 590-598, 2022.

“Multi-Institutional Study of End-to-End Dose Delivery Quality Assurance Testing for Image-Guided Brachytherapy Using a Gel Dosimeter”H Tachibana, Y Watanabe, K Usui, et.al. Brachytherapy, 21:P.956-967, 2022.

“A cycle generative adversarial network for improving the quality of four‑dimensional cone‑beam computed tomography images”Usui K, Ogawa K, Goto M, Sakano Y, Kyougoku S, Daida H. Radiat Oncol 17, 69, 2022, https://doi.org/10.1186/s13014-022-02042-1

“Improving the accuracy of motion quantification using area detector computed tomography for real-time tumor-tracking irradiation in stereotactic ablative radiotherapy” K Suzuki, K Usui, K Sasai. Med Dosim., 2:P.166-172, 2022.

“Semiautomatic Treatment Planning for the Field-in-field Technique in Whole Brain Irradiation," H Watanabe, K Sasai, K Usui, K Sasai. Juntendo Medical Journal, 68:P.375-386, 2022.

“Image Quality Improvement for Chest Four-Dimensional Cone-Beam Computed Tomography by Cycle-Generative Adversarial Network”K. Usui, K. Ogawa, M. Goto, Y. Sakano, S. Kyogoku, H. Daida., Med Imag Tech., 40:P.37-47, 2022.

【2021年】
“Comparison of Moderate Hypofractionated Volumetric-Modulated Arc Therapy Plans With and Without Flattening Filter for Localized Prostate Cancer”Yosuke Takakusagi, Keisuke Usui, Nobutaka Mizoguchi, Jun Nagatsuka, Takeshi Hikage, Yasuhiko Kodama, Takatomo Ezura, Terufumi Kusunoki, Yukio Oizumi. Cureus. 2021 Sep 16;13(9):e18034. doi:10.7759/cureus.18034. eCollection 2021

“Quantitative evaluation of deep convolutional neural network-based image denoising for low-dose computed tomography”K. Usui, K. Ogawa, M. Goto, Y. Sakano, S. Kyogoku, H. Daida. Vis Comput Ind Biomed Art, Jul 25;4(1):21. doi: 10.1186/s42492-021-00087-9. 2021

“Cycle-Generative Adversarial Network-Based Image Correction of 4-Dimensional Cone-Beam Computed Tomography for Lung Cancer Adaptive Radiation Therapy” K. Usui, K. Ogawa, M. Goto, Y. Sakano, N. Shikama, S. Kyogoku, K. Sasai, H. Daida. International Journal of Radiation Oncology • Biology • Physics, Vol. 111, Issue 3, E129, 2021

“The effect of rotational setup errors in total body irradiation using helical tomotherapy on dose distribution” A. Isobe, K. Usui, N. Hara, K. Sasai. J Appl Clin Med Phys, pp.1-10, DOI: 10.1002/acm2.13271, 2021

“Low dose CT denoising using a pre-trained convolutional neural network” K. Usui, A. Isobe, K. Ogawa, Juntendo Health Science Journal, 2(1): 13-18, 2021

【2020年】
“Dosimetric evaluation of the uncorrectable rotational setup error in total body irradiation using helical tomotherapy system” Akira Isobe, Keisuke Usui, Haruka Katou, Junpei Ohbuchi, Naoya Hara, Keisuke Sasai、Proceedings of 20thAsia-Oceania Congress on Medical Physics (AOCMP), pp.356-359, 2020

“Quantitative evaluation of deep convolutional neural network based denoising for ultra-low-dose CT” Keisuke Usui, Kentarou Suzuki, Akira Isobe, Kazumi Murata, Koichi Ogawa、Proceedings of 20thAsia-Oceania Congress on Medical Physics (AOCMP), pp.315-318, 2020

“Analysis of Correlation Between Breast Surface Position and Internal Organ Deformation Using Deep-Inspiration Breath Holding for Left-Sided Breast Irradiation” K. Usui, M. Oshima, A. Isobe, T. Kawamoto, N. Shikama, K. Sasai. International Journal of Radiation Oncology • Biology • Physics, Vol. 108, Issue 3, e287, 2020

“Reducing contrast dose using virtual monoenergetic imaging for aortic CTA” R. Yoshida, K. Usui, Y. Katsunuma, H. Honda, K. Hatakeyama. J Appl Clin Med Phys, 21(8):272-277, 2020

“Improving the imaging of thoracic tumors using four-dimensional cone-beam CT with combined shared projection data” K. Usui, K. Ogawa. Juntendo Health Science Journal, 1(1):9-16, 2020

【2019年】
“Clinical Evaluation of a Rotational Set-up Correction Device for Multiple Brain Metastases Using Single-Isocenter Stereotactic Radiation Therapy” K. Usui, A.Isobe, N.Hara, T.Kawamoto, M. Oshima, N. Shikama, K. Sasai. International Journal of Radiation Oncology • Biology • Physics, Vol. 105, Issue 1, e775, 2019

“待ち伏せ体幹部定位照射における治療計画時と照射時の金マーカ位置の相違に関する検討” 大島理規, 鹿間直人, 川本晃史, 宮澤一成, 杉本聡, 臼井桂介, 高津淳, 笹井啓資. 臨床放射線, 2019; 64巻: pp.1057-1061.

“Development of a rotational set-up correction device for stereotactic head radiation therapy: A performance evaluation” K Usui, A Isobe, N Hara, T Muroi, O Sajiki, K Ogawa, N Shikama, K Sasai. J Appl Clin Med Phys, vol.20, Issue 6, pp 206-212, 2019

“Patient organ doses from megavoltage computed tomography delivery with a helical tomotherapy unit using a general treatment planning system” Nagata H, Sugimoto S, Hongo H, Hashimoto H, Sato Y, Kawabata T, Watanabe H, Inoue T, Usui K, Kurokawa C, Sasai K. J Radiat Res. pp. 1-11, 2019

【2018年】
“Appropriate treatment planning method for field joint dose in total body irradiation using helical tomotherapy” K Usui, A Isobe, N Hara, N Shikama, K Sasai, K Ogawa. Med Dosim, 44(4):344-353, 2018

“Dosimetric and Radiobiological Evaluation of Delivered Dose Distribution with Intra-Fractional Motion in Prostate Stereotactic Radiation Therapy Treatments Using VMAT and Helical Tomotherapy” K. Usui, J. Takatsu, K. Ogawa, N. Shikama, K. Sasai. International Journal of Radiation Oncology • Biology • Physics, Vol. 102, Issue 3, e559, 2018

“Development of a Rotational Set-Up Correction Device for Head Stereotactic Radiation Therapy” K Usui, N Hara, A Isobe, T Muroi, O Sajiki, K Ogawa, N Shikama, K Sasai, Medical physics, Vol.45, e413, 2018

"Effect of region extraction and assigned mass-density values on the accuracy of dose calculation with magnetic resonance-based volumetric arc therapy planning” K. Usui, K. Sasai, K. Ogawa, Radiol Phys　Technol., vol.11, Issue 2, pp 174-183, 2018

【2017年】
"Improvement of Dose Calculation with Scattered Photon-Corrected kV Cone-Beam CT Image Using the Kernel Deconvolution Method" K. Usui, S. Kubota, K. Sasai, K. Ogawa. International journal of radiation oncology・ biology・physics, Vol.99, Issue 2, E730, 2017

“A Layered Collimator for Radiographic Imaging” I Kusakari, K Ogawa, Usui K, IEEE Nuclear Science Symposium and Medical Imaging Conference, CD-ROM, 2017.

"Analysis of Dose Calculation Accuracy in Cone Beam Computed Tomography with Various Amount of Scattered Photon Contamination" Usui, K., Ogawa, K. and Sasai, K. (2017) International Journal of Medical Physics, Clinical Engineering and Radiation Oncology, 6, 233-251. doi: 10.4236/ijmpcero.2017.63022.

"呼吸同期PET/CTを用いた横隔膜境界における肉眼的腫瘍体積の算出能の評価" 中澤脩人、梅田拓郎、宮司典明、三輪健太、我妻慧、茂木一樹、滝口智洋、寺内隆司、小泉満、臼井桂介、笹井啓資. 日放技学誌 2017; 73(8): 617-625.

【2016年】
“Effect of region extraction and assigned electron density value on the accuracy of dose calculation with MRI-based VMAT planning” Usui K, Inoue T, Kurokawa C, Sugimoto S, Sasai K, Ogawa K, Medical physics international journal, Vol.4, pp.206, 2016

“Analyzing the effect of scattered photons on cone beam computed tomography-based adaptive radiation therapy” K. Usui, T. Inoue, C. Kurokawa, S. Sugimoto, K. Sasai, K. Ogawa. International journal of radiation oncology・biology・physics, Vol.96, Issue 2, E635, 2016

"Monte carlo study on a cone-beam computed tomography using a cross-type carbon fiber antiscatter grid”K Usui,T Inoue,C Kurokawa,S Sugimoto,K Sasai,K Ogawa,Medical physics, Vol.43,3422,2016

“モンテカルロ法によるコーンビームCTへのクロス型カーボングリッドの有効性の検証” 臼井桂介,笹井啓資,尾川浩一,他.8名中1番目,第35回日本医用画像工学会大会,CD-ROM,7pages,2016.

“Limited impact of setup and range uncertainties,breathing motion and interplay effects in robustly optimized intensity mofdulated proton therapy for stage III non-small cell lung cancer” T Inoue,J Widder,K Usui et al.International journal of radiation oncology,biology,physics,Vol.96,pp.661-669,2016

"赤外線モニタの信号波形が四次元コーンビームCTの標的画像へ与える影響" 臼井桂介，原直哉，礒邉哲，井上達也，黒河千恵，杉本聡，笹井啓資，尾川浩一，日放技学誌 2016; 72(6): 469-479.

【2015年】
“Visualization of a Target Positions Using the 4 Dimensional Cone-beam CT Image Reconstruction with the Extracorporeal Infrared Monitor，” Keisuke Usui, Naoya Hara, Tatsuya Inoue, Toru Kawabata, Hironori Nagata, Chie Kurokawa, Satoru Sugimoto, Keisuke Sasai, Koichi Ogawa,IEEE Nuclear Science Symposium and Medical Imaging Conference, CD-ROM, 2015.

“体外式赤外線モニタを利用した放射線治療用コーンビームCTの4次元画像再構成，” 臼井桂介，原直哉，礒邉哲，井上達也，黒河千恵，杉本聡，笹井啓資，尾川浩一，第34回日本医用画像工学会大会,CD-ROM,9 pages,2015.

【2014年】
“放射線治療用イメージングシステムにおける動きを伴う標的に対するCBCT画像再構成，”臼井桂介，黒河千恵，杉本聡，株木重人，国枝悦夫，笹井啓資，尾川浩一，Med Imag Tech.,vol.32,no.2,pp.132-142,2014.

“動く標的のモーションアーチファクトに対するkV-CBCTのデータ取得条件の最適化,”臼井桂介，黒河千恵，杉本聡，石倉聡，笹井啓資，尾川浩一，第33回日本医用画像工学会大会,CD-ROM,6pages,2014.

"An effect of the data acquisition conditions for the moving tumor affecting to the reconstruction image with the kilo-voltage-CBCT” Usui K, Kurokawa C, Sugimoto S, Sasai K, Ogawa K, Japanese Journal of Medical Physics, vol.34, pp.46,2014.

【2013年】
“適応的放射線治療のためのCBCT画像を用いた放射線治療計画の評価，”　臼井桂介，国枝悦夫，尾川浩一，Med Imag Tech.,vol.31,no.4,　pp.231-239,2013.

"Dose calculation with a cone beam CT image in image-guided radiation therapy,” Usui K, Ichimaru Y, Okumura Y, Murakami K, Seo M, Kunieda E, Ogawa K, Radiol Phys　Technol.,vol.6,pp.107-114,2013.

"CBCT image reconstruction of a moving target with an on-board imaging system for radiation therapy,” Usui K, Kabuki S, Kurokawa C, Sugimoto S, Sasai K, Kunieda E, Ogawa K, Conf. Record on IEEE Nuclear Science Symposium and Medical Imaging Conference, doi:10.1109/NSSMIC.2013.6829337,2013.

"A study of 4D CBCT image reconstruction using detection of the target position from 2D projection images,” Usui K, Hiroki T, Fujita K, Kabuki S, Kunieda E, Ogawa K, International Journal of Radiation Oncology Biology Physics,vol.87,no.25,S702,2013.

"The effect of region extraction accuracy on the dose calculation with CBCT images combined with MSCT images,” Usui K, Kunieda E, Ogawa K, Annual Meeting on European Congress of Radiology,doi:10.1594/ecr2013/C-0648,2013.

“動態位置の時相情報に基づいた4D CBCT画像再構成の基礎検討，”臼井桂介，黒河千恵，杉本聡，株木重人，国枝悦夫，笹井啓資，尾川浩一，第32回日本医用画像工学会大会,CD-ROM,7pages,2013.

"Basic study of 4D CBCT reconstruction using the detection of the target position from 2D projection images,” Usui K, Hiroki T, Fujita K, Kabuki S, Kunieda E, Ogawa K, Japanese Journal of Medical Physics,vol.33,pp.47,2013.

【2012年】
"Motion detection system with GPU acceleration for stereotactic radiosurgery,” Yamakawa T, Ogawa K, Iyatomi H, Kunieda K, Usui K, Shigematsu N, Med Imag Tech.,vol.30, no.5,pp.268-2278,2012.

"Feasibility of dose calculation using combined information of cone-beam and multi-slice CT images,” Usui K, Kunieda E, Ogawa K, Medical Physics,vol.39,3675,2012.

"Evaluation on pixel value conversion methods for dose calculation with kilo-voltage cone beam CT images,” Usui K, Kihara A, Ichimaru Y, Okumura Y, Murakami M, Seo M, Kunieda E, Ogawa K, World Congress on Medical Physics and Biomedical Engineering, IFMBE Proceedings,vol.39,pp.1783-1786,2012.

“CBCTとMSCTの合成画像に対する領域抽出精度が線量計算に与える影響について，”臼井桂介，広木智之，藤田健太，一丸恭伸，奥村康弘，国枝悦夫，尾川浩一，医学物理,vol.33,pp.71-72,2012.

“CBCT画像による線量計算を目的とした画素値変換法の検討,”臼井桂介, 木原彩佳, 国枝悦夫, 尾川浩一, 医学物理,vol.32,pp.144,2012.

“前立腺IMRTにおける治療計画線量指標の最適化に関する検討,” 木原彩佳，臼井桂介，村上克己，瀬尾誠，国枝悦夫，医学物理,vol.32, pp.147,2012.

【2011年】
"Feasibility of kV-CBCT images for the dose calculation in image-guided radiotherapy,” Usui K, Kihara A, Ichimaru Y, Okumura Y, Murakami K, Kunieda E, Ogawa K, Japanese Journal of Medical Physics,vol.31,no.4,213,CD-R(D8-1),2011.

“東海大学におけるIMRT線量検証のまとめ Map CHECKによるγ解析結果の傾向,”臼井桂介，国枝悦夫，臨床放射線,vol.56,pp.1164-1165,2011.

“前立腺IMRTにおける位置照合方法の違いによるPTVマージンの検討,”　臼井桂介，木原彩佳，一丸恭伸，宗像浩二，余語克紀，秋庭健志，国枝悦夫, 医学物理,vol.31,pp.126,2011.

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臼井 桂介（ウスイ ケイスケ）

臼井桂介（ウスイケイスケ）