A5036006179- Advanced Radiotherapy Techniques
- Medical Imaging Techniques and Applications
- Radiation Therapy and Dosimetry
- Radiation Dose and Imaging
- Advances in Oncology and Radiotherapy
- Advanced X-ray and CT Imaging
- Lung Cancer Diagnosis and Treatment
- Radiation Detection and Scintillator Technologies
- Prostate Cancer Treatment and Research
- Prostate Cancer Diagnosis and Treatment
- Glioma Diagnosis and Treatment
- Radiation Effects and Dosimetry
- Advanced MRI Techniques and Applications
- Radiopharmaceutical Chemistry and Applications
- Brain Metastases and Treatment
- Endometrial and Cervical Cancer Treatments
- Heavy Metals in Plants
- MRI in cancer diagnosis
- Medical Image Segmentation Techniques
- Clinical practice guidelines implementation
- Wireless Body Area Networks
- Phytochemicals and Antioxidant Activities
- IoT and Edge/Fog Computing
- Meningioma and schwannoma management
- Ultrasound and Hyperthermia Applications
Komazawa University
2024
Japan Clinical Cancer Research Organization
2020-2023
Advanced Imaging Research (United States)
2015-2020
Chiba Cancer Center
2007-2013
Tokyo Metropolitan University
2011
Kanagawa Cancer Center
2011
Nagoya City University
2011
Saitama Medical University
2011
Kanagawa Prefectural Hospital Organization
2011
Tokyo Metropolitan Komagome Hospital
2011
Although the antioxidant properties of green, oolong, and black teas have been well studied, activity has not examined in roasted tea. Therefore, current studies, we investigated tea comparison with those teas. Using water extracts various teas, total phenolic content as activities, including reducing power, 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity, inhibition hemolysis caused by 2,2'-azo-bis(2-amidinopropane) dihydrochloride (AAPH)-induced lipid oxidation erythrocyte...
Respiratory motion management (RMM) systems in external and stereotactic radiotherapies have been developed the past two decades. Japanese medical service fee regulations introduced reimbursement for RMM from April 2012. Based on thorough discussions among four academic societies concerned, these Guidelines to enable staff (radiation oncologists, radiological technologists, physicists, radiotherapy quality managers, radiation oncology nurses, others) apply therapy tumors subject respiratory...
Abstract The purpose of this study was to investigate the utilization and implementation stereotactic body radiotherapy (SBRT) intensity-modulated (IMRT) in Japan up 2023. survey conducted by Japanese Society for Radiation Oncology High-Precision External Beam Radiotherapy Group Subcommittee from December 2023 February 2024. targeted patients treated with IMRT or SBRT between January 2021 2022. A comprehensive web-based questionnaire distributed 880 facilities, separate sections radiation...
Abstract Several staffing models are used to determine the required medical physics staffing, including radiotherapy technologists, of radiation oncology departments. However, since Japanese facilities tend be smaller in scale than foreign ones, those might not apply Japan. Therefore, this study, we surveyed workloads Japan estimate optimal external beam radiotherapy. A total 837 were collect information regarding techniques and specialists (RTMPs). The survey covered facility information,...
Abstract Background Failure mode and effects analysis (FMEA), which is an effective tool for error prevention, has garnered considerable attention in radiotherapy. FMEA can be performed individually, by a group or committee, online. Purpose To meet the needs of various purposes improve its accessibility, we developed simple, self‐contained, versatile web‐based risk worksheet. Methods We worksheet using Google products, such as Sheets, Forms, Apps Script. The main sheet was created Sheets...
ENWEndNote BIBJabRef, Mendeley RISPapers, Reference Manager, RefWorks, Zotero AMA Okamoto H, Nakamura S, Nishioka et al. Independent assessment of source position for gynecological applicator in high-dose-rate brachytherapy. Journal Contemporary Brachytherapy. 2017;9(5):477-486. doi:10.5114/jcb.2017.70952. APA Okamoto, H., Nakamura, S., Nishioka, Iijima, K., Wakita, A., & Abe, Y. (2017). Brachytherapy, 9(5), 477-486. https://doi.org/10.5114/jcb.2017.70952 Chicago Hiroyuki, Satoshi Shie...
Deformable image registration (DIR) has recently become commercially available in the field of radiotherapy. However, there was no detailed information regarding use DIR software at each medical institution. Thus, this study, we surveyed status clinical for radiotherapy Japan. The Japan Society Medical Physics and Japanese Radiation Oncology mailing lists were used to announce survey. questionnaire created by investigators working under research grant (2017-2018) intended collection survey...
Abstract The first magnetic resonance (MR)-guided radiotherapy system in Japan was installed May 2017. Implementation of online MR-guided adaptive (MRgART) began February 2018. Online MRgART offers greater treatment accuracy owing to the high soft-tissue contrast MR-images (MRI), compared that X-ray imaging. Japanese Society for Magnetic Resonance Medicine (JSMRM), Medical Physics (JSMP), Radiological (JRS), Technology (JSRT), and Radiation Oncology (JASTRO) jointly established comprehensive...
Abstract The Japan Clinical Oncology Group–Radiation Therapy Study Group (JCOG-RTSG) has initiated several multicenter clinical trials for high-precision radiotherapy, which are presently ongoing. When conducting multi-center trials, a large difference in physical quantities, such as the absolute doses to target and organ at risk, well irradiation localization accuracy, affects treatment outcome. Therefore, differences various quantities used different institutions must be within an...
The Medical Physics Working Group of the Radiation Therapy Study at Japan Clinical Oncology is currently developing a virtual audit system for intensity-modulated radiation therapy dosimetry credentialing. target dosimeters include films and array detectors, such as ArcCHECK (Sun Nuclear Corporation, Melbourne, Florida, USA) Delta4 (ScandiDos, Uppsala, Sweden). This pilot study investigated feasibility our using previously acquired data.We analyzed 46 (32 14 in axial coronal planes,...
To reduce the uncertainty of absorbed dose for high energy photon beams, water has been chosen as a reference material by dosimetry protocols. However, solid phantoms are used media absolute verification intensity modulated radiotherapy (IMRT). For measurement, fluence scaling factor is converting an ionization chamber reading in phantom to water. Furthermore depth indispensable determining factor. IMRT spectrum varied transmitting through multileaf collimator and attenuating media. effects...
Abstract This study aimed to clarify the dosimetric impact of calibration beam quality for coefficients absorbed dose water an ionization chamber in on-site dosimetry audit. Institution-measured doses 200 photon and 184 electron beams were compared with measured using one year data before after used. For reference dosimetry, agreements institution-measured against two this audit evaluated determined 60Co (${N}_{D,\mathrm{w},{}^{60}\mathrm{Co}}$) linear accelerator (linac)...