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Nihon Hoshasen Gijutsu Gakkai zasshi最新文献

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[1. Key Points in Exposure Parameter Settings for Radiography]. (1。射线照相曝光参数设置的要点]。
Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0209
Mitsuhiro Nakamae
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引用次数: 0
[Preface]. (前言)。
Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0208
Mitsuhiro Nakamae, Masashi Seki, Yasuyuki Morita
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引用次数: 0
[The Challenge of an International Presentation]. [国际演讲的挑战]。
Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0104
Soichiro Yoshida
{"title":"[The Challenge of an International Presentation].","authors":"Soichiro Yoshida","doi":"10.6009/jjrt.26-0104","DOIUrl":"https://doi.org/10.6009/jjrt.26-0104","url":null,"abstract":"","PeriodicalId":74309,"journal":{"name":"Nihon Hoshasen Gijutsu Gakkai zasshi","volume":"82 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146020949","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
[13. Knowledge of Radiation Therapy Applicable to Nuclear Medicine Therapy]. (13。放射治疗知识（适用于核医学治疗）。
Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0504
Ryo Kakino
{"title":"[13. Knowledge of Radiation Therapy Applicable to Nuclear Medicine Therapy].","authors":"Ryo Kakino","doi":"10.6009/jjrt.26-0504","DOIUrl":"https://doi.org/10.6009/jjrt.26-0504","url":null,"abstract":"","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":"147984616","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
[3. Beam Delivery and Field-shaping Techniques in Particle Therapy-Passive Scattering and Scanning Methods]. (3。粒子治疗中的光束传输和场整形技术——被动散射和扫描方法[j]。
Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0507
Toshiyuki Ogata
{"title":"[3. Beam Delivery and Field-shaping Techniques in Particle Therapy-Passive Scattering and Scanning Methods].","authors":"Toshiyuki Ogata","doi":"10.6009/jjrt.26-0507","DOIUrl":"https://doi.org/10.6009/jjrt.26-0507","url":null,"abstract":"","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":"147984638","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
[Connecting Beyond Boundaries]. [超越界限的连接]。
Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0611
Seiichi Murakami
{"title":"[Connecting Beyond Boundaries].","authors":"Seiichi Murakami","doi":"10.6009/jjrt.26-0611","DOIUrl":"https://doi.org/10.6009/jjrt.26-0611","url":null,"abstract":"","PeriodicalId":74309,"journal":{"name":"Nihon Hoshasen Gijutsu Gakkai zasshi","volume":"82 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148297646","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
[Intracranial Hemorrhage Assessment Using Sequential Acquisition Dual-energy CT after Endovascular Thrombectomy]. [序贯采集双能CT评价血管内取栓术后颅内出血]。
Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-1589
Yu Hagiwara, Masato Kiriki, Wataru Jomoto, Yusuke Kawanaka
{"title":"[Intracranial Hemorrhage Assessment Using Sequential Acquisition Dual-energy CT after Endovascular Thrombectomy].","authors":"Yu Hagiwara, Masato Kiriki, Wataru Jomoto, Yusuke Kawanaka","doi":"10.6009/jjrt.26-1589","DOIUrl":"10.6009/jjrt.26-1589","url":null,"abstract":"<p><p>The usefulness of dual-source dual-energy computed tomography (DECT) in distinguishing contrast staining (CS) from intracranial hemorrhage (ICH) has been reported. In this study, we evaluated ICH after mechanical thrombectomy (MT) using sequential acquisition DECT (SADE) and examined its diagnostic accuracy. Of the 76 patients who underwent MT for acute ischemic stroke between August 2022 and August 2023, 56 were ultimately included in the study. Using virtual non-contrast images (VNC) and iodine map images obtained from DECT, high-attenuation (HA) areas on mixed images were classified into ICH and CS, and the accuracy of DECT was evaluated using follow-up images of CT or magnetic resonance imaging within 48 hours after DECT. A total of 129 foci of HA areas were identified on the mixed image. There were 20 HA regions that were judged to have both ICH and CS, 109 that were judged to have CS only, and no HA regions that were judged to have ICH only. The sensitivity, specificity, and accuracy for identifying hemorrhage were 20.9%, 91.9%, and 65.8%, respectively. Misregistration artifacts occurred in VNC (n=2, 3.6%). In the evaluation of ICH after MT, although the sensitivity of SADE for bleeding is low due to the influence of delayed hemorrhagic changes, it has high specificity and is highly reliable for distinguishing CS. In addition, SADE may cause misregistration artifacts due to slight body movement.</p>","PeriodicalId":74309,"journal":{"name":"Nihon Hoshasen Gijutsu Gakkai zasshi","volume":"82 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148152545","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
[Examination for Usefulness of Scatter Correction in Emergency Lateral Cervical Spine Radiography]. [急诊颈椎侧位片散射校正的有效性检验]。
Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-1602
Atsushi Ueno, Tsuyoshi Sakou
{"title":"[Examination for Usefulness of Scatter Correction in Emergency Lateral Cervical Spine Radiography].","authors":"Atsushi Ueno, Tsuyoshi Sakou","doi":"10.6009/jjrt.26-1602","DOIUrl":"10.6009/jjrt.26-1602","url":null,"abstract":"<p><strong>Purpose: </strong>This study aimed to investigate the usefulness of scatter correction in emergency lateral cervical spine radiography.</p><p><strong>Methods: </strong>A lead disc or an aluminum circular plate was placed on a water-equivalent phantom with a thickness of 13 cm, and radiographic images were acquired by varying the distances between the phantom and the flat panel detector (air gaps). The content rate of scattered radiation, signal-difference-to-noise ratio measured from image-processed images (SDNR<sub>IP</sub>), and contrast were evaluated for images with scatter correction technique (virtual grid images: VG images), images with a grid (real grid images: RG images), and images without a grid or scatter correction technique (WG images). Additionally, lateral cervical spine radiographs were obtained using a phantom, and paired comparison methods (contrast, granularity, sharpness, overall assessment) were performed by seven radiologic technologists.</p><p><strong>Results: </strong>The content rate of scattered radiations in VG images decreased with increasing air gap and became lower than in RG images at air gaps of 15 cm or more. SDNR<sub>IP</sub> and contrast for VG images were significantly higher than for RG images at air gaps of 15 cm and 20 cm (p<0.05). In the observer study, VG images were significantly superior to others in all evaluation items except granularity (p<0.05).</p><p><strong>Conclusion: </strong>The use of scatter correction in emergency lateral cervical spine radiography proves useful in achieving image quality superior to that of a grid.</p>","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":"147679174","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
[Examination of Non-saturation Pulse 3D TOF MRA in Acute Cerebral Infarction]. [急性脑梗死非饱和脉冲3D TOF MRA检查]。
Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-1579
Yuji Miyatake, Tatsuya Yamasaki, Takuya Kobata
{"title":"[Examination of Non-saturation Pulse 3D TOF MRA in Acute Cerebral Infarction].","authors":"Yuji Miyatake, Tatsuya Yamasaki, Takuya Kobata","doi":"10.6009/jjrt.26-1579","DOIUrl":"10.6009/jjrt.26-1579","url":null,"abstract":"<p><strong>Purpose: </strong>We investigated flip angle (FA) and cerebrovascular imaging performance in three-dimensional time-of-flight magnetic resonance angiography (3D TOF-MRA) without using a venous signal saturation pulse in the diagnosis of acute cerebral infarction.</p><p><strong>Methods: </strong>3D TOF-MRA was performed in healthy volunteers at FAs of 9°-21° without using a venous signal saturation pulse. The contrast of cerebral arteries, veins, and parenchyma was measured, and the visualization of blood vessels was compared by visual evaluation.</p><p><strong>Results: </strong>Cerebral artery contrast was highest at a 19° FA, and the visual evaluation also showed the highest rated results at a 19° FA. The cerebral venous contrast did not depend on the FA, and it was almost constant.</p><p><strong>Conclusion: </strong>A repetition time of 10 ms and a 19° FA are the optimal settings for 3D TOF-MRA without using a venous signal saturation pulse, which reduces the imaging time by approximately 60% compared to the conventional method.</p>","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":"146204076","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
[2. Utilization of Data and AI in Society (2): Utilization in Real-world Settings]. (2。数据和人工智能在社会中的应用(2)：在现实世界中的应用[j]。
Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0203
Satoshi Kasai
{"title":"[2. Utilization of Data and AI in Society (2): Utilization in Real-world Settings].","authors":"Satoshi Kasai","doi":"10.6009/jjrt.26-0203","DOIUrl":"https://doi.org/10.6009/jjrt.26-0203","url":null,"abstract":"","PeriodicalId":74309,"journal":{"name":"Nihon Hoshasen Gijutsu Gakkai zasshi","volume":"82 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147277706","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
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