Výsledky vyhledávání - "Toru Takakura"

Survey on utilization of flattening filter-free photon beams in Japan

Autor: Takumi Kodama, Tetsurou Katayose, Kazunori Miyaura, Toru Takakura, Shie Nishioka, Mitsuhiro Nakamura, Keisuke Yasui

Publikováno v: Journal of Radiation Research

To understand the current state of flattening filter-free (FFF) beam implementation in C-arm linear accelerators (LINAC) in Japan, the quality assurance (QA)/quality control (QC) 2018–2019 Committee of the Japan Society of Medical Physics (JSMP) co

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::02d6f489e79ebfa31cdd2059768f1c67
https://pubmed.ncbi.nlm.nih.gov/34036361

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Evaluation of differences and dosimetric influences of beam models using golden and multi-institutional measured beam datasets in radiation treatment planning systems

Autor: Naoki Hayashi, Kensuke Tani, N Tohyama, Ryohei Miyasaka, Satoshi Kito, Yoshitaka Oka, Shunsuke Miyake, Hideki Kojima, Akihisa Wakita, Toru Takakura, Ryuzo Uehara, Yukio Fujita, Kazuya Shinoda, Norifumi Mizuno, Saito Yasunori

Publikováno v: Medical physicsREFERENCES. 47(11)

PURPOSE The beam model in radiation treatment planning systems (RTPSs) plays a crucial role in determining the accuracy of calculated dose distributions. The purpose of this study was to ascertain differences in beam models and their dosimetric influ

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e6fc8a714035382e1af5c1089dccb8c1
https://pubmed.ncbi.nlm.nih.gov/32969046

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Evaluation of beam-on time and number of breath-holds using a flattening-filter-free beam with the deep inspiration breath-hold method in left-sided breast cancer

Autor: Toru Takakura, Masahiko Koizumi, Aiki Uehara, Ayano Tashima, Satoshi Koubuchi, Tomoyo Hirose, Hiroto Kimura, Seiji Tachiiri

Publikováno v: Medical dosimetry : official journal of the American Association of Medical Dosimetrists. 45(4)

We performed a dosimetric study to evaluate the benefits of using a flattening-filter-free (FFF) beam with the deep inspiration breath-hold (DIBH) method for left-breast cancer. We used data from 30 previous patients with treatment plans that include

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4f710536602ac7cc693ccb80c58b5b11
https://pubmed.ncbi.nlm.nih.gov/32546372

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Questionnaire survey on treatment planning techniques for lung stereotactic body radiotherapy in Japan

Autor: Mitsuhiro Nakamura, Shinsuke Yano, Seiichi Ota, Yoshihiro Ueda, Toru Takakura, Satoshi Kito, Hidetoshi Shimizu, Koji Sasaki, Daisaku Tatsumi

Publikováno v: Journal of Radiation Research

This study aimed to obtain details regarding treatment planning techniques for lung stereotactic body radiation therapy (SBRT) employed at each institution in Japan by using a questionnaire survey. An Internet questionnaire survey on SBRT procedures

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5847ed50de7c6c7aabb6e88128d74f2d
https://pubmed.ncbi.nlm.nih.gov/31845998

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Dosimetric shield evaluation with tungsten sheet in 4, 6, and 9MeV electron beams

Autor: Toru Takakura, Hajime Monzen, Kyoji Higashimura, Shinsuke Yano, Takashi Okada, Junichi Kuwahara, Manabu Nakata, Makoto Sasaki, Takahiro Fujimoto, Masahiro Hiraoka

Publikováno v: Physica Medica. 30:838-842

In electron radiotherapy, shielding material is required to attenuate beam and scatter. A newly introduced shielding material, tungsten functional paper (TFP), has been anticipated to become a very useful device that is lead-free, light, flexible, an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bda6230027ab9f19f10ba739634c50d1
https://doi.org/10.1016/j.ejmp.2014.05.009

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Effects of interportal error on dose distribution in patients undergoing breath‐holding intensity‐modulated radiotherapy for pancreatic cancer: evaluation of a new treatment planning method

Autor: Toru Takakura, Akira Nakamura, Mitsuhiro Nakamura, Teruki Teshima, Manabu Nakata, Kyoji Higashimura, Takehiro Shiinoki, Masahiro Hiraoka, Keiko Shibuya, Yukinori Matsuo

Publikováno v: Journal of Applied Clinical Medical Physics
Scopus-Elsevier

In patients with pancreatic cancer, intensity‐modulated radiotherapy (IMRT) under breath holding facilitates concentration of the radiation dose in the tumor, while sparing the neighboring organs at risk and minimizing interplay effects between mov

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::14eb40d77bad4dd0d0e23cae1141e5ca
http://europepmc.org/articles/PMC5714573

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Simulation for improvement of system sensitivity of radiochromic film dosimetry with different band-pass filters and scanner light intensities

Autor: Takeshi Kamomae, Takashi Mizowaki, Yuki Miyabe, Akio Itoh, Osamu Matoba, Shinsuke Yano, Akira Sawada, Manabu Nakata, Toru Takakura, Masahiro Hiraoka

Publikováno v: Radiological Physics and Technology. 4:140-147

The delivered dose of high-energy photon beams is measured with radiochromic film. Previous studies sought to improve the system sensitivity of radiochromic film dosimetry by use of band-pass filters. However, band-pass filters reduce the scanning li

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed2892d607a91df638b689126afea7d4
https://doi.org/10.1007/s12194-011-0113-6

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The geometric accuracy of frameless stereotactic radiosurgery using a 6D robotic couch system

Autor: Yuki Miyabe, Manabu Nakata, S. Yano, Toru Takakura, Masahiro Hiraoka, Takashi Mizowaki, Mitsuhiro Nakamura, Takahiro Fujimoto

Publikováno v: Physics in Medicine and Biology. 55:1-10

The aim of this paper is to assess the overall geometric accuracy of the Novalis system using the Robotic Tilt Module in terms of the uncertainty in frameless stereotactic radiotherapy. We analyzed the following three metrics: (1) the correction accu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::11b6232dc598be00699d1225381c8612
https://doi.org/10.1088/0031-9155/55/1/001

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Verification of the dose attenuation of a newly developed vacuum cushion for intensity-modulated radiation therapy of prostate cancer

Autor: Yoshiyuki Ito, Takashi Sakamoto, Akinori Higashikawa, Toru Takakura, Tomohiro Nishiyama

Publikováno v: Radiological physics and technology. 9(2)

This study measured the dose attenuation of a newly developed vacuum cushion for intensity-modulated radiation therapy (IMRT) of prostate cancer, and verified the effect of dose-correction accuracy in a radiation treatment planning system (RTPS). The

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4cdaf26d2a5d8d740abc0ae55ea5856f
https://pubmed.ncbi.nlm.nih.gov/27260347

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Evaluation of Setup Error and Adequate Setup Margins in Patients with Prostate Cancer Treated by IMRT and Fixed in the Prone Position Using a Set of Immobilization Devices

Autor: Yoshinori Norihisa, Shinsuke Yano, Toru Takakura, Takahiro Fujimoto, Kana Matsubara, Takashi Mizowaki, Kenji Takayama, Manabu Nakata, Takashi Okada

Publikováno v: Japanese Journal of Radiological Technology. 62:130-135

Purpose: Positional reproducibility in patients with prostate cancer fixed in the prone position with a set of immobilization devices for external-beam intensity-modulated radiation therapy (IMRT) was evaluated. In addition, the adequacy of our posit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d22b8ffcfd1edc22c5f98dc08381c9ee
https://doi.org/10.6009/jjrt.62.130

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