Nihon Hoshasen Gijutsu Gakkai zasshi最新文献_第5页

[Clinical Evaluation of AI-based Automatic Contouring for Thoracic Structures]. 基于人工智能的胸部结构自动轮廓的临床评价

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-1649

Hideharu Miura, Minoru Nakao, Masanori Ochi, Masahiro Kenjo, Shuichi Ozawa, Masayuki Kagemoto

{"title":"[Clinical Evaluation of AI-based Automatic Contouring for Thoracic Structures].","authors":"Hideharu Miura, Minoru Nakao, Masanori Ochi, Masahiro Kenjo, Shuichi Ozawa, Masayuki Kagemoto","doi":"10.6009/jjrt.26-1649","DOIUrl":"https://doi.org/10.6009/jjrt.26-1649","url":null,"abstract":"Purpose: This study aimed to verify the contouring accuracy of the artificial intelligence (AI)-based auto-segmentation software Contour+ (MVision AI Oy, Helsinki, Finland) both quantitatively and visually, and to evaluate its clinical validity for the thoracic region in Japanese patients.Methods: Ten thoracic radiotherapy cases with lung lesions were analyzed. Contour+ was used to automatically delineate both lungs, trachea, bronchus, esophagus, spinal cord, and heart. Three observers visually evaluated the auto-contours using a five-point scoring system, and the final manually corrected contours were used as the reference to calculate the dice similarity coefficient (DSC), Hausdorff distance (HD), and volume differences.Results: In all cases, the AI auto-contours were evaluated as \"clinically acceptable with minor modifications (score ≥3),\" with an average score of 4.4. The mean DSC values were 1.00 for the lungs, 0.99 for the trachea, 0.91 for the bronchi, 0.86 for the esophagus, 0.99 for the spinal cord, and 0.99 for the heart, indicating high agreement. The mean HD values were 5.68 mm, 8.72 mm, and 3.30 mm for the bronchi, esophagus, and heart, respectively. The mean volume changes after manual correction were 4.02 cc for the bronchi, 2.55 cc for the esophagus, and 2.58 cc for the heart.Conclusion: AI-based auto-segmentation software Contour+ demonstrated high geometric agreement and clinical validity for major thoracic organs in Japanese patients, suggesting its potential to reduce the contouring workload and promote standardization in radiotherapy treatment planning.","PeriodicalId":74309,"journal":{"name":"Nihon Hoshasen Gijutsu Gakkai zasshi","volume":"82 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147679248","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

[9. Data Analysis Methods (3): Bayesian Inference]. (9。数据分析方法(3)：贝叶斯推理。

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0903

Hayaru Shouno

引用次数: 0

[7. Clinical Significance and Imaging Techniques of Weight-Bearing Radiography]. (7。负重x线摄影的临床意义及影像学技术[j]。

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0907

Masashi Yamazaki

引用次数: 0

[The Report from the Task Group of Promoting Research Participation among Early-Career Members]. [促进早期职业成员参与研究任务小组的报告]。

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0808

Ayaka Hirosawa

引用次数: 0

[Simultaneous Acquisition of Vessel Wall Imaging and MR Angiography in Brain MRI]. [脑MRI血管壁成像和MR血管成像同时采集]。

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-1600

Hiroki Okada, Yuichi Uchiumi, Masayuki Sato, Natsumi Tanaka, Mizuki Kurosawa, Yoshiyuki Ishimori

引用次数: 0

[The Importance of Continuous Radiation Education for Nurses]. 护士持续放射教育的重要性

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-1613

Yoshiaki Morishima, Michiaki Ito

{"title":"[The Importance of Continuous Radiation Education for Nurses].","authors":"Yoshiaki Morishima, Michiaki Ito","doi":"10.6009/jjrt.26-1613","DOIUrl":"10.6009/jjrt.26-1613","url":null,"abstract":"Purpose: Nurses are frequently involved in radiologic imaging procedures; however, opportunities to learn about radiology in clinical practice are limited. This study aimed to assess the current level of radiology-related knowledge among newly hired nurses at Tohoku Medical and Pharmaceutical University Hospital (hereafter referred to as our hospital) and to clarify the need for radiology education.Methods: A questionnaire survey was conducted among 77 nurses who started working at our hospital in April 2022. The survey included items related to radiology education, knowledge of radiation exposure, and interest in working in radiology departments.Results: Although 58.4% of respondents had attended radiation-related classes during their studies, 93.5% were unable to distinguish between radioactivity and radiation. Misunderstandings were also observed regarding the safe distance required during portable X-ray imaging and the hereditary effects of radiation exposure. In contrast, 62.3% of the nurses expressed interest in working in radiology departments in the future.Conclusion: Newly hired nurses surveyed in this study demonstrated insufficient fundamental knowledge and several misconceptions regarding radiology, yet showed interest in working in radiology, highlighting the need for structured educational programs.","PeriodicalId":74309,"journal":{"name":"Nihon Hoshasen Gijutsu Gakkai zasshi","volume":"82 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147517297","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

[Subject Thickness Measurement and Entrance Surface Dose Estimation Using an RGB-D Camera in Chest Radiography]. [胸片中使用RGB-D相机测量受试者厚度和入口表面剂量估算]。

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-1692

Kenji Yasue, Atsushi Urikura, Koichi Hanada, Hiraku Fuse

{"title":"[Subject Thickness Measurement and Entrance Surface Dose Estimation Using an RGB-D Camera in Chest Radiography].","authors":"Kenji Yasue, Atsushi Urikura, Koichi Hanada, Hiraku Fuse","doi":"10.6009/jjrt.26-1692","DOIUrl":"https://doi.org/10.6009/jjrt.26-1692","url":null,"abstract":"Purpose: This study aimed to quantify the effect of measurement duration on subject thickness accuracy using an RGB-D camera at a source-to-image distance (SID) of 200 cm for chest radiography and to evaluate the accuracy of entrance surface dose (ESD) estimation based on 1-s measurements.Methods: A chest radiography phantom was evaluated at subject thicknesses of 20, 25, 30, and 35 cm. Subject thickness was measured five times at measurement durations of 1, 5, and 10 s and compared with caliper measurements. ESD estimated from the mean subject thickness obtained over 1 s was compared with the reference ESD calculated from the caliper-based thickness.Results: The maximum subject thickness error was 0.48 cm, the maximum relative error was +1.4%, and the maximum standard deviation was 0.12 cm. No significant differences among measurement durations were found at 20, 25, or 30 cm. At 35 cm, an overall difference was found, but no pairwise difference was significant after adjustment for multiple comparisons. The maximum relative error in ESD estimation was +0.6% at 35 cm.Conclusion: Under static phantom conditions at an SID of 200 cm, subject thickness measurements obtained over 1 s and the resulting ESD estimates were close to the reference values. These findings support further evaluation of short-duration RGB-D measurements for chest radiography.","PeriodicalId":74309,"journal":{"name":"Nihon Hoshasen Gijutsu Gakkai zasshi","volume":"82 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149221281","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

[Pioneering a New Era for JSRT through Academic Integration and the Development of Next-Generation Talent]. [通过学术整合和下一代人才培养开创JSRT新时代]。

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0103

Takayuki Ishida

引用次数: 0

[Participation/Dispatch Reports on the 53rd Autumn Meeting]. [第53次秋季会议的出席/派遣报告]。

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0201

Kaori Hayakawa, Ryuto Shuto, Yoshiki Sunada, Naochika Akiya, Tatsuya Choji, Yuina Tamai, Koh Maezawa, Yoshito Kobayashi

引用次数: 0

[Dr. Yoshiharu Higashida]. [东田义春博士]。

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0303

Seiichi Murakami

引用次数: 0