Radiological Physics and Technology

Công bố khoa học tiêu biểu

* Dữ liệu chỉ mang tính chất tham khảo

Sắp xếp:  
Comparison of volumetric-modulated arc therapy and intensity-modulated radiation therapy prostate cancer plans accounting for cold spots
Radiological Physics and Technology - Tập 12 - Trang 137-148 - 2019
Tran Thi Thao Nguyen, Hidetaka Arimura, Ryosuke Asamura, Taka-aki Hirose, Saiji Ohga, Jun-ichi Fukunaga
This study compared dosimetric indices of volumetric-modulated arc therapy (VMAT) with intensity-modulated radiation therapy (IMRT) accounting for cold spots in prostate cancer plans. IMRT plans were retrospectively generated from 30 prostate cancer patients with ten cases for each risk group, who received VMAT plans. The mean, maximum, and minimum doses, and conformity and homogeneity indexes wer...... hiện toàn bộ
Neutron dose from a 6-MV X-ray beam in radiotherapy
Radiological Physics and Technology - Tập 16 - Trang 186-194 - 2023
Hiroaki Matsubara
Although a 6-MV X-ray beam is employed clinically as a non-neutron-producing beam, no studies have reported how few neutrons are produced from a 6-MV beam. This study aimed to theoretically deduce the neutron dose from a 6-MV beam using Monte Carlo simulations for the notification of safety and risk in radiotherapy. Nuclei from a nuclear database with neutron separation energies below 6 MeV were s...... hiện toàn bộ
Improving image quality using the pause function combination to PROPELLER sequence in brain MRI: a phantom study
Radiological Physics and Technology -
Kousaku Saotome, Koji Matsumoto, Yoshiaki Kato, Yoshihiro Ozaki, Motohiro Nagai, Tomoyuki Hasegawa, Hiroyuki Tsuchiya, Tensho Yamao
Copper filtration in pediatric digital X-ray imaging: its impact on image quality and dose
Radiological Physics and Technology - - 2011
Philippe Brosi, Anja Stuessi, Francis R. Verdun, Peter Vock, Rainer Wolf
The effect of copper (Cu) filtration on image quality and dose in different digital X-ray systems was investigated. Two computed radiography systems and one digital radiography detector were used. Three different polymethylmethacrylate blocks simulated the pediatric body. The effect of Cu filters of 0.1, 0.2, and 0.3 mm thickness on the entrance surface dose (ESD) and the corresponding effective d...... hiện toàn bộ
Development of a device that remotely removes a mask in the head and neck immobilization system: a prototype and demonstration experiment
Radiological Physics and Technology - Tập 15 Số 3 - Trang 249-254 - 2022
Tomoo Aoyama, Hidetoshi Shimizu, Tomoki Kitagawa, Yasunori Ishiguro, Takeshi Kodaira
Photon-specific absorbed fraction estimates in stylized ORNL and voxelized ICRP adult male phantoms using a new developed Geant4-based code “DoseCalcs”: a validation study
Radiological Physics and Technology - Tập 15 Số 4 - Trang 323-339 - 2022
T. El Ghalbzouri, T. El Bardouni, Jaafar El Bakkali, Hicham Satti, A. Arectout, I. Berriban, A Nouayti, Randa Yerrou
Reduction of respiratory ghosting motion artifacts in conventional two-dimensional multi-slice Cartesian turbo spin-echo: which k-space filling order is the best?
Radiological Physics and Technology - - 2018
Yuuji Inoue, Masami Yoneyama, Masanobu Nakamura, Akihiro Takemura
Development and performance evaluation of the second model 256-detector row CT
Radiological Physics and Technology - Tập 1 - Trang 20-26 - 2007
Masahiro Endo, Shinichiro Mori, Susumu Kandatsu, Shuji Tanada, Chisato Kondo
Since our initial development of the 256-detector row CT scanner (256-row CT) for four-dimensional (4D) imaging of moving organs in 2003, the results of physical performance and those in animal and human studies have suggested that this scanner may be useful in the examination of moving organs such as the heart and lungs. We have now developed a second model of the 256-row CT with improved specifi...... hiện toàn bộ
Virtual clinical trial based on outcome modeling with iteratively redistributed extrapolation data
Radiological Physics and Technology - Tập 16 - Trang 262-271 - 2023
Kohei Oguma, Taiki Magome, Masanori Someya, Tomokazu Hasegawa, Koh-ichi Sakata
Virtual clinical trials (VCTs) can potentially simulate clinical trials on a computer, but their application with a limited number of past clinical cases is challenging due to the biased estimation of the statistical population. In this study, we developed ExMixup, a novel training technique based on machine learning, using iteratively redistributed extrapolated data. Information obtained from 100...... hiện toàn bộ
Adapting non-local means of de-noising in intraoperative magnetic resonance imaging for brain tumor surgery
Radiological Physics and Technology - Tập 7 - Trang 124-132 - 2013
Takashi Mizukuchi, Masazumi Fujii, Yuichiro Hayashi, Masatoshi Tsuzaka
In image-guided brain tumor surgery, intraoperative magnetic resonance imaging (iMRI) is a powerful tool for updating navigational information after brain shift, controlling the resection of brain tumors, and evaluating intraoperative complications. Low-field iMRI scans occasionally generate a lot of noise, the reason for which is yet to be determined. This noise adversely affects the neurosurgeon...... hiện toàn bộ
Tổng số: 522   
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 10