Nihon Hoshasen Gijutsu Gakkai zasshi最新文献_第7页

[ECR2026 Participation Report]. [ECR2026参与报告]。

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0706

Ryotaro Inui

引用次数: 0

[6. Imaging Techniques for Reducing Total Examination Dose: The Pre-shot Approach]. (6。降低总检查剂量的成像技术：注射前方法]。

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0802

Yasuyuki Morita

引用次数: 0

[Comparison of Procedural Parameters and Efficiency between Angio FFR and Wire-based FFR for Functional Severity Assessment]. [血管FFR与导线FFR用于功能严重程度评估的程序参数和效率比较]。

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-1665

Hirotaka Itai, Daichi Ideguchi, Toshihisa Kawasaki

{"title":"[Comparison of Procedural Parameters and Efficiency between Angio FFR and Wire-based FFR for Functional Severity Assessment].","authors":"Hirotaka Itai, Daichi Ideguchi, Toshihisa Kawasaki","doi":"10.6009/jjrt.26-1665","DOIUrl":"https://doi.org/10.6009/jjrt.26-1665","url":null,"abstract":"Purpose: Angio FFR has attracted attention as a method for assessing the functional severity of intermediate coronary artery stenosis. However, detailed comparisons with wire-based FFR in terms of radiation dose and procedural efficiency remain limited. This study aimed to compare examination-related parameters and procedural efficiency between the two methods and to evaluate the clinical utility of angio FFR.Methods: This retrospective clinical study included patients who underwent functional assessment of coronary artery stenosis using either angio FFR or wire-based FFR during cardiac catheterization. The evaluated parameters were reference-point air kerma at the patient entrance reference point (Ka,r), air kerma-area product (PKA), fluoroscopy time, contrast volume, number of images, and angiography room stay time. Continuous variables were compared using median values and interquartile ranges.Results: Compared with the wire-based FFR group, the angio FFR group showed significantly lower Ka,r, fluoroscopy time, contrast volume, and angiography room stay time (p<0.05). No significant differences were observed in PKA (p=0.95) or the number of images (p=0.27).Conclusion: Angio FFR was associated with lower Ka,r and improved procedural efficiency compared with wire-based FFR, suggesting its potential utility in functional assessment of coronary artery stenosis.","PeriodicalId":74309,"journal":{"name":"Nihon Hoshasen Gijutsu Gakkai zasshi","volume":"82 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149032251","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

[Measurement of Defect Areas in Lead Aprons Using Click-prompt-based Semi-automatic Region Extraction with the Segment Anything Model]. [使用分段任意模型的基于点击提示的半自动区域提取引线围裙缺陷区域的测量]。

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-1705

Masato Takahashi, Hiraku Fuse, Koichi Hanada, Manamu Kimura, Kenji Yasue, Shin Miyakawa, Hiroki Nosaka, Norikazu Koori

{"title":"[Measurement of Defect Areas in Lead Aprons Using Click-prompt-based Semi-automatic Region Extraction with the Segment Anything Model].","authors":"Masato Takahashi, Hiraku Fuse, Koichi Hanada, Manamu Kimura, Kenji Yasue, Shin Miyakawa, Hiroki Nosaka, Norikazu Koori","doi":"10.6009/jjrt.26-1705","DOIUrl":"https://doi.org/10.6009/jjrt.26-1705","url":null,"abstract":"Purpose: To develop a click-prompt-style semi-automatic defect segmentation method using Segment Anything Model 2 (SAM2) with Low-Rank Adaptation (LoRA) for fluoroscopic images of lead aprons and to evaluate its quantitative performance and usefulness.Methods: Twenty-four fluoroscopic images acquired from 19 lead aprons were divided into training/validation (n=14) and test datasets (n=10). Two radiological technologists independently annotated the test images and established Consensus GT masks after reviewing discrepancies. Four radiological technologists performed manual and click-prompt-based segmentation using SAM2 Original and SAM2-LoRA (r=8, 16, and 32). All methods were evaluated against the Consensus GT.Results: Inter-annotator agreement between the two independent GT masks was ICC(2,1)=0.982 for area, with a Dice coefficient of 0.802 and IoU of 0.674. Mean Dice coefficients against the Consensus GT were 0.708 for manual segmentation, 0.426 for SAM2 Original, and 0.752, 0.774, and 0.759 for SAM2-LoRA with r=8, 16, and 32, respectively. The r=16 setting showed the smallest mean absolute area error among the models (69.7 mm2).Conclusion: Under the conditions of this small single-center study, click-prompt-based SAM2-LoRA may support measurement of candidate defect areas in fluoroscopic images of lead aprons. External validation is required before use for automated rejection decisions.","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":"149221273","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

[Dr. Takaharu Hongo].

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0906

Yasuo Takatsu

引用次数: 0

[8. Basics and Recent Advances in Absorbed Dose-to-Water Measurement]. (8。吸收剂量-水测量的基础和最新进展]。

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-1003

Toshiyuki Toshito

引用次数: 0

[Next-Generation Radiological Technology and Science through Global Collaboration]. [通过全球合作的下一代放射技术和科学]。

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0102

Hiroyuki Takashima, Hiroko Yamashina, Toshikazu Imae, Rie Tanaka, Shigeyoshi Saito, Toshioh Fujibuchi, Kenta Miwa

引用次数: 0

[9. High-sensitivity in vivo Imaging of ²¹¹At using XCam-CdTe]. (9。XCam-CdTe在2111at体内的高灵敏度成像。

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0108

Shin'ichiro Takeda

引用次数: 0

[10. Expectations on Dosimetry in Radiopharmaceutical Therapy]. (10。放射药物治疗中剂量学的展望[j]。

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0205

Naoyuki Ukon

引用次数: 0

[The Current State of PACS and the Future of Medical Digital Transformation Using the Cloud]. [PACS的现状和使用云的医疗数字化转型的未来]。

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0501

Masahito Uesugi

引用次数: 0