Publications by authors named "Ryusuke Hara"

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Multi-institutional study on the commissioning and clinical implementation of the TrueBeam enhanced leaf model in the Eclipse treatment planning system.
Ryohei Miyasaka, Ryuta Hirai, Yuhi Suda, Ryohei Yamauchi, Norifumi Mizuno, Ryusuke Hara

J Appl Clin Med Phys· December 2025

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Commissioning of Halcyon enhanced leaf model in the Eclipse treatment planning system: Focus on simple slit fields and VMAT dose calculation.
Ryohei Miyasaka, Mari Shirai, Mitsunobu Igari, Yume Kojima, Yuki Kozawa, Ryusuke Hara

J Appl Clin Med Phys· June 2025

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A Japanese multi-institutional phase II study of moderate hypofractionated intensity-modulated radiotherapy with image-guided technique for prostate cancer.
Katsumasa Nakamura, Keiji Nihei, Yoshihiro Saito, Naoto Shikama, Shin-Ei Noda, Ryusuke Hara

Int J Clin Oncol· June 2024

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Utility of a skin marker-less setup procedure using surface-guided imaging: a comparison with the traditional laser-based setup in extremity irradiation.
Kei Yamashita, Takayuki Shimizu, Kanae Miyabayashi, Tsutomu Iwase, Gentaro Togasaki, Ryusuke Hara

Radiol Phys Technol· June 2024

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Investigation of Halcyon multi-leaf collimator model in Eclipse treatment planning system: A focus on the VMAT dose calculation with the Acuros XB algorithm.
Ryohei Miyasaka, SangYong Cho, Takuya Hiraoka, Kohei Chiba, Toru Kawachi, Ryusuke Hara

J Appl Clin Med Phys· March 2022

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Effect of ICRU report 90 recommendations on Monte Carlo calculated k for ionization chambers listed in the Addendum to AAPM's TG-51 protocol.
Toru Kawachi, Hidetoshi Saitoh, Tetsurou Katayose, Naoki Tohyama, Ryohei Miyasaka, Ryusuke Hara

Med Phys· November 2019

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Gemcitabine plus nab-paclitaxel for locally advanced or borderline resectable pancreatic cancer.
Akiko Tsujimoto, Kentaro Sudo, Kazuyoshi Nakamura, Emiri Kita, Ryusuke Hara

Sci Rep· November 2019

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Evaluation of gantry angle during respiratory-gated VMAT using triggered kilovoltage x-ray image.
Ryohei Miyasaka, Hidetoshi Saitoh, Toru Kawachi, Tetsurou Katayose, SangYong Cho, Ryusuke Hara

J Appl Clin Med Phys· August 2019

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A multi-institutional observational study on the effects of three-dimensional radiotherapy and weekly 40-mg/m cisplatin on postoperative uterine cervical cancer patients with high-risk prognostic factors.
Fumiaki Isohashi, Tadao Takano, Mamiko Onuki, Takahide Arimoto, Naoki Kawamura, Ryusuke Hara

Int J Clin Oncol· May 2019

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Phase II study of induction gemcitabine and S-1 followed by chemoradiotherapy and systemic chemotherapy using S-1 for locally advanced pancreatic cancer.
Kentaro Sudo, Ryusuke Hara, Kazuyoshi Nakamura, Emiri Kita, Akiko Tsujimoto

Cancer Chemother Pharmacol· July 2017

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Clinical Results of Carbon Ion Radiotherapy at NIRS.
Hirohiko Tsujii, Junetsu Mizoe, Tadashi Kamada, Masayuki Baba, Hiroshi Tsuji, Ryusuke Hara

J Radiat Res· April 2016

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Methionine Uptake and Required Radiation Dose to Control Glioblastoma.
Toshihiko Iuchi, Kazuo Hatano, Yoshio Uchino, Makiko Itami, Yuzo Hasegawa, Ryusuke Hara

Int J Radiat Oncol Biol Phys· September 2015

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Therapeutic outcomes of neoadjuvant and concurrent androgen-deprivation therapy and intensity-modulated radiation therapy with gold marker implantation for intermediate-risk and high-risk prostate cancer.
Masayuki Kobayashi, Kazuo Hatano, Satoshi Fukasawa, Atsushi Komaru, Takeshi Namekawa, Ryusuke Hara

Int J Urol· May 2015

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Phase 2 trial of hypofractionated high-dose intensity modulated radiation therapy with concurrent and adjuvant temozolomide for newly diagnosed glioblastoma.
Toshihiko Iuchi, Kazuo Hatano, Takashi Kodama, Tsukasa Sakaida, Sana Yokoi, Ryusuke Hara

Int J Radiat Oncol Biol Phys· March 2014

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Stereotactic body radiotherapy (SBRT) for operable stage I non-small-cell lung cancer: can SBRT be comparable to surgery?
Hiroshi Onishi, Hiroki Shirato, Yasushi Nagata, Masahiro Hiraoka, Masaharu Fujino, Ryusuke Hara

Int J Radiat Oncol Biol Phys· December 2011

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Compensatory enlargement of the liver after treatment of hepatocellular carcinoma with carbon ion radiotherapy - relation to prognosis and liver function.
Hiroshi Imada, Hirotoshi Kato, Shigeo Yasuda, Shigeru Yamada, Takeshi Yanagi, Ryusuke Hara, Shinichi Minohara

Radiother Oncol· August 2010

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Stereotactic body radiotherapy for lung tumors at the pulmonary hilum.
Yoshiko Oshiro, Takashi Aruga, Koji Tsuboi, Kan Marino, Ryusuke Hara

Strahlenther Onkol· May 2010

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Comparison of respiratory-gated and respiratory-ungated planning in scattered carbon ion beam treatment of the pancreas using four-dimensional computed tomography.
Shinichiro Mori, Takeshi Yanagi, Ryusuke Hara, Gregory C Sharp, Hiroshi Asakura

Int J Radiat Oncol Biol Phys· January 2010

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Long-term control of disseminated pleomorphic xanthoastrocytoma with anaplastic features by means of stereotactic irradiation.
Tomoyuki Koga, Akio Morita, Keisuke Maruyama, Minoru Tanaka, Yasushi Ino, Junji Shibahara, Ryusuke Hara

Neuro Oncol· August 2009

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Four-dimensional measurement of intrafractional respiratory motion of pancreatic tumors using a 256 multi-slice CT scanner.
Shinichiro Mori, Ryusuke Hara, Takeshi Yanagi, Gregory C Sharp, Motoki Kumagai

Radiother Oncol· August 2009

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Impact of intrafractional bowel gas movement on carbon ion beam dose distribution in pancreatic radiotherapy.
Motoki Kumagai, Ryusuke Hara, Shinichiro Mori, Takeshi Yanagi, Hiroshi Asakura

Int J Radiat Oncol Biol Phys· March 2009

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Water-equivalent pathlength reproducibility due to respiratory pattern variation in charged-particle pancreatic radiotherapy.
Motoki Kumagai, Shinichiro Mori, Ryusuke Hara, Hiroshi Asakura, Riwa Kishimoto

Radiol Phys Technol· January 2009

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11C-methionine-PET for evaluation of carbon ion radiotherapy in patients with pelvic recurrence of rectal cancer.
Mitsuru Koizumi, Tsuneo Saga, Kyosan Yoshikawa, Kazutoshi Suzuki, Shigeru Yamada, Ryusuke Hara

Mol Imaging Biol· December 2008

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Hypofractionated stereotactic radiotherapy (HypoFXSRT) for stage I non-small cell lung cancer: updated results of 257 patients in a Japanese multi-institutional study.
Hiroshi Onishi, Hiroki Shirato, Yasushi Nagata, Masahiro Hiraoka, Masaharu Fujino, Ryusuke Hara

J Thorac Oncol· July 2007

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Clinical outcomes of single-fraction stereotactic radiation therapy of lung tumors.
Ryusuke Hara, Jun Itami, Tatsuya Kondo, Takashi Aruga, Takashi Uno

Cancer· March 2006

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