Nihon Hoshasen Gijutsu Gakkai zasshi最新文献_第2页

[Global Business Solution Using WTO/TBT Agreement].

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2025-01-01 DOI: 10.6009/jjrt.25-0203

Yuji Yanagida

引用次数: 0

[6. Commissioning and Dosimetry Standards for 0.35 Tesla MRI Linac].

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2025-01-01 DOI: 10.6009/jjrt.25-0200

Yu Kumazaki

引用次数: 0

[Dr. Taizo Sanada].

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2025-01-01 DOI: 10.6009/jjrt.25-0201

Yoshinori Tanabe

引用次数: 0

[4. Chubu Branch, Kinki Branch, Chugoku-Shikoku Branch, Kyushu Branch]. (4。中部分行，近畿分行，中部四国分行，九州分行]。

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2025-01-01 DOI: 10.6009/jjrt.25-0104

Naoki Nagasawa, Shigeyoshi Saito, Rie Ishii, Yasumasa Saigo

引用次数: 0

[Thinking about 10 Years from Now].

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2025-01-01 DOI: 10.6009/jjrt.25-0204

Satoshi Yanagita

引用次数: 0

[For the Future of the JSRT]. [为了JSRT的未来]。

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2025-01-01 DOI: 10.6009/jjrt.25-0103

Takayuki Ishida

引用次数: 0

[Assessment of Radiation Dose Reduction for Medical Staff at the Patient's Head Side in Structural Heart Disease Intervention Using Protective Equipment].

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2025-01-01 DOI: 10.6009/jjrt.25-1505

Hirotoshi Murakami, Naoki Hosoda, Natsuki Oyama, Ryoya Hatsuoka, Itaru Sudo

{"title":"[Assessment of Radiation Dose Reduction for Medical Staff at the Patient's Head Side in Structural Heart Disease Intervention Using Protective Equipment].","authors":"Hirotoshi Murakami, Naoki Hosoda, Natsuki Oyama, Ryoya Hatsuoka, Itaru Sudo","doi":"10.6009/jjrt.25-1505","DOIUrl":"https://doi.org/10.6009/jjrt.25-1505","url":null,"abstract":"In interventions for structural heart disease (SHD), an echocardiologist and an anesthesiologist are also present close to the side of the bed at the patient's head. The purpose of this study was to investigate the effectiveness of X-ray protective devices in reducing exposure to scatter radiation for medical staff at the side of the head end of the angiography system bed during interventions for structural heart disease. The ambient radiation dosage was measured, with and without X-ray protective equipment, to determine the rate of reduction of scatter radiation. The dosage tended to be higher at the working angle compared to the PA direction. When protective equipment was not used, the dosage tended to be higher at the side of the head end of the bed than at the operator's position. The dose was reduced by more than 90% compared to that without protective equipment by installing a protective device at the side of the head end of the bed. It is important to understand the spatial dose distribution at the working angle, and the installation of protective equipment at the side of the head end of the bed during SHD interventions can reduce the exposure of attending staff.","PeriodicalId":74309,"journal":{"name":"Nihon Hoshasen Gijutsu Gakkai zasshi","volume":"81 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143383702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

[Impact of Imaging and Reconstruction Parameters for Cone-beam Computed Tomography on Three-dimensional Star Shot Using an X-ray CT-based Gel Dosimeter].

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2025-01-01 DOI: 10.6009/jjrt.25-1465

Shinichi Takahashi, Hidenobu Tachibana, Riki Oshika, Rie Tachibana, Masashi Itou

{"title":"[Impact of Imaging and Reconstruction Parameters for Cone-beam Computed Tomography on Three-dimensional Star Shot Using an X-ray CT-based Gel Dosimeter].","authors":"Shinichi Takahashi, Hidenobu Tachibana, Riki Oshika, Rie Tachibana, Masashi Itou","doi":"10.6009/jjrt.25-1465","DOIUrl":"https://doi.org/10.6009/jjrt.25-1465","url":null,"abstract":"Previous studies have not demonstrated the influence of various imaging acquisition and reconstruction conditions on three-dimensional star shot analysis using an X-ray-based gel dosimeter. Therefore, we investigated the effects of image acquisition and reconstruction conditions on the method in this study and evaluated the robustness of the method. Firstly, we set a reference condition (80 kVp, 1080 mAs, full fan, full trajectory, 1800 projection number, iterative reconstruction) and nine other comparison conditions (80-125 kVp, 540-2160 mAs, half or full fan, full or half trajectory, 420-5400 projection number and iterative reconstruction or filtered back projection). Cone-beam computed tomography scans were performed under each condition before and after irradiation of the single gel dosimeter, and the position of the radiation isocenter relative to the image isocenter, beam isocentricity, and contrast-to-noise ratio (CNR) was measured. The differences compared to the reference were as follows: for isocenter distance, 0.0±0.1 mm on the X-axis, 0.0±0.2 mm on the Y-axis, and 0.1±0.3 mm on the Z-axis. The beam isocentricity was 0.0±0.2 mm. The CNR ranged from a maximum of 5.8 to a minimum of 2.6 in median comparisons. In contrast, compared to the results under the reference condition, the results under other conditions matched within a range of ±0.25 mm. This investigation showed that analysis is feasible within an uncertainty of 0.25 mm under imaging conditions where CNR is 3 or higher.","PeriodicalId":74309,"journal":{"name":"Nihon Hoshasen Gijutsu Gakkai zasshi","volume":"81 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143383793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

[5. History of Radiation Effects Research].

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2025-01-01 DOI: 10.6009/jjrt.25-0202

Yoshiaki Hirofuji

引用次数: 0

[Paper Review: PET Detectors with Depth-of-interaction and Time-of-flight Capabilities].

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2025-01-01 DOI: 10.6009/jjrt.25-0205

Hideo Murayama

引用次数: 0