Nihon Hoshasen Gijutsu Gakkai zasshi最新文献_第3页

[Development of an Information Aggregation System for a Multidisciplinary Team in Medical Education]. [医学教育多学科团队信息聚合系统的开发]。

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2025-01-01 DOI: 10.6009/jjrt.25-1517

Hayato Tsuno, Koji Sasaki, Hiroshi Igarashi

{"title":"[Development of an Information Aggregation System for a Multidisciplinary Team in Medical Education].","authors":"Hayato Tsuno, Koji Sasaki, Hiroshi Igarashi","doi":"10.6009/jjrt.25-1517","DOIUrl":"10.6009/jjrt.25-1517","url":null,"abstract":"Purpose: Typically, grades are compiled using spreadsheet software, and the file is then emailed with the password sent in a separate email. The government has pointed out that this method does not provide robust security. Introducing a new system is difficult due to the psychological factor of status quo bias. Therefore, we devised a new grade compilation system that uses spreadsheet software that can be easily implemented. The research aims to develop an automatic grade compilation system that implements RSA encryption.Methods: As Excel's specifications do not allow for the display of more than 16 significant digits, we devised a method of applying modular exponentiation to modular arithmetic. The time required for encryption was measured five times and the average value was calculated.Results: The time required for encryption was approximately 2.3 seconds, and RSA encryption is highly secure, it has the advantage of being able to distribute files with e-mail, and a paperless workflow could be established.Conclusion: The developed system is highly secure and can be sent via email, and its automation is effective as a means of preventing disputes caused by human error.","PeriodicalId":74309,"journal":{"name":"Nihon Hoshasen Gijutsu Gakkai zasshi","volume":"81 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143461039","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

[Comparison of CT-like Images Using MRI]. [ct样图像与MRI的比较]。

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2025-01-01 DOI: 10.6009/jjrt.25-1467

Ryosuke Fujii, Masayoshi Sugimura, Masakazu Kurita

引用次数: 0

[National Survey on System Settings of Angiography for Endovascular Treatment for Lower Extremity Arterial Disease]. 全国下肢动脉疾病血管内治疗血管造影系统设置调查

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2025-01-01 DOI: 10.6009/jjrt.25-1530

Yuji Sakai, Tomomichi Ishibashi, Yoshinori Takao, Toru Ishibashi, Yudai Fujimoto, Mitsuharu Osawa, Akihiro Shinobu, Kenji Hasegawa, Hajime Sakamoto

{"title":"[National Survey on System Settings of Angiography for Endovascular Treatment for Lower Extremity Arterial Disease].","authors":"Yuji Sakai, Tomomichi Ishibashi, Yoshinori Takao, Toru Ishibashi, Yudai Fujimoto, Mitsuharu Osawa, Akihiro Shinobu, Kenji Hasegawa, Hajime Sakamoto","doi":"10.6009/jjrt.25-1530","DOIUrl":"https://doi.org/10.6009/jjrt.25-1530","url":null,"abstract":"Purpose: The objective of this study was to determine the standard settings of the angiography system during EVT in Japan.Methods: Survey requests were mailed to 493 facilities across Japan. The survey items included in the survey were system display dose setting of fluoroscopy dose (FL dose)/digital angiography dose (DA dose)/digital subtraction angiography dose (DSA dose), detector size, fluoroscopy pulse rate, DA/DSA frame rate, and standard additional filter settings. The number of valid responses for each item was system display dose setting: 187 systems (128 institutions), detector size: 187 systems (128 institutions), fluoroscopy pulse rate and DA/DSA frame rate: 185 systems (127 institutions), standard additional filter settings: 182 systems (125 institutions).Results: Median (interquartile range) of each system display dose setting was FL: 5.9 (4.2-7.8) mGy/min, DA: 0.10 (0.06-0.16) mGy/frame, DSA: 0.82 (0.64-1.40) mGy/frame. The detector size for dose measurements was 103 systems (55%) with a diagonal of 35 cm or less and 84 systems (45%) with a diagonal of more than 35 cm. The most used FL pulse rate was 7.5 pulse/s (132 systems: 71%), DA frame rate was 7.5 frame/s (72 systems: 39%), and DSA frame rate was 3 frame/s (97 systems: 52%). More than 90% of the institutions used some kind of additional filter for imaging.Conclusion: This survey showed the standard setting of the angiography system during EVT in Japan.","PeriodicalId":74309,"journal":{"name":"Nihon Hoshasen Gijutsu Gakkai zasshi","volume":"81 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144061525","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

[Paper Review: Compton Imaging for Medical Applications]. [论文综述：康普顿成像的医学应用]。

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2025-01-01 DOI: 10.6009/jjrt.25-0401

Makoto Sakai

引用次数: 0

[Simulation Image Generation Used to Produce Contrast-detail Diagram in X-ray CT]. [用于制作 X 射线 CT 对比细节图的模拟图像生成]。

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2025-01-01 DOI: 10.6009/jjrt.25-1443

Kenichi Sakai, Masaki Ohkubo, Akihiro Narita, Naoya Takahashi, Yoshiyuki Noto

{"title":"[Simulation Image Generation Used to Produce Contrast-detail Diagram in X-ray CT].","authors":"Kenichi Sakai, Masaki Ohkubo, Akihiro Narita, Naoya Takahashi, Yoshiyuki Noto","doi":"10.6009/jjrt.25-1443","DOIUrl":"10.6009/jjrt.25-1443","url":null,"abstract":"Purpose: To propose a method for generating simulated images that are used to produce a contrast detail (C-D) diagram in X-ray computed tomography (CT).Methods: We numerically generated object functions assuming ideal spheres of 7 diameters and 9 contrasts between sphere density and background density. Sphere images were calculated from the object functions by the simulation technique of image blurring based on the 3-dimensional spatial resolution measured in the CT system. The calculated sphere images were added in images of the uniform water-equivalent section of a phantom acquired at different tube currents. Obtained images were arranged according to the sphere diameter and contrast and were applied to produce the C-D diagram. For each tube current, the C-D diagram was created by a board-certified diagnostic radiologist.Results: The calculated sphere images showed good agreements with actually acquired sphere images of the phantom. Standard deviations (SDs) in subtraction images of them were equivalent to the SD in the background region of the actual image, suggesting the accuracy of the calculated sphere images. The obtained C-D diagram showed that smaller spheres and spheres with lower contrast tended to be detected as the tube current increased.Conclusion: The proposed method was suggested to be feasible for producing the C-D diagram for CT.","PeriodicalId":74309,"journal":{"name":"Nihon Hoshasen Gijutsu Gakkai zasshi","volume":"81 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143797361","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

[Global Business Solution Using WTO/TBT Agreement]. [使用WTO/TBT协议的全球商业解决方案]。

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

Yuji Yanagida

引用次数: 0

[Radioproteomics for Discriminating the Activity and Inactivity of Immune Checkpoint Molecules in Breast Cancer]. 放射蛋白质组学用于鉴别乳腺癌免疫检查点分子的活性和不活性。

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2025-01-01 DOI: 10.6009/jjrt.25-0301

Fuyu Harada

引用次数: 0

[Introduction]. (介绍)。

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2025-01-01 DOI: 10.6009/jjrt.25-0403

Kenta Miwa

引用次数: 0

[Application of the IR Method Using a Normal Database Created by FBP Method with No Correction in ^99mTc Myocardial Perfusion SPECT]. [无校正FBP法建立正常数据库的IR方法在99mTc心肌灌注SPECT中的应用]。

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2025-01-01 DOI: 10.6009/jjrt.25-1524

Keiko Segawa, Takayuki Shibutani, Yusuke Yamaguchi, Hajime Ichikawa, Takahiro Konishi, Hiroto Yoneyama, Kenichi Nakajima

{"title":"[Application of the IR Method Using a Normal Database Created by FBP Method with No Correction in 99mTc Myocardial Perfusion SPECT].","authors":"Keiko Segawa, Takayuki Shibutani, Yusuke Yamaguchi, Hajime Ichikawa, Takahiro Konishi, Hiroto Yoneyama, Kenichi Nakajima","doi":"10.6009/jjrt.25-1524","DOIUrl":"10.6009/jjrt.25-1524","url":null,"abstract":"Purpose: Japanese normal databases (NDB) for quantitative evaluation of 99mTc myocardial perfusion SPECT have traditionally been created by the filtered back projection (FBP) method but are also applied to the iterative reconstruction (IR) method in some institutions. Although creating the NDB specifically for the IR method is desirable, it has not been done partly due to the ethical aspects of creating an institution-specific database. This study investigated the impact of using NDBs created by the FBP method on quantitative evaluations performed with the IR method.Methods: We analyzed single-photon emission computed tomography (SPECT) images from patients undergoing myocardial perfusion study in two hospitals with three SPECT vendors. Images were processed with and without various corrections, and a polar map was created by QPS software using a 17-segment model to obtain %uptake and scores. The effects of the reconstruction and correction methods were evaluated to determine the difference in the number of local segmental analyses by coronary artery territories.Results: In most segments, quantitative values showed no significant difference across device types, with or without corrections. However, both choices of the SPECT device and correction methods influenced the scores in specific coronary artery regions. Application of attenuation correction resulted in lower defect scores in the right coronary artery region.Conclusion: Applying FBP-derived NDB to the IR method generally yielded a consistent patient diagnosis in terms of defect score analysis. However, since the quantitative evaluation was partly affected by various correction methods and devices, recognizing these characteristics is crucial for enhancing diagnostic accuracy.","PeriodicalId":74309,"journal":{"name":"Nihon Hoshasen Gijutsu Gakkai zasshi","volume":"81 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495051","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

[Evaluation of Exposure Dose Reduction Effect for Cone-beam Computed Tomography with Bismuth Sheet in Image-guided Radiation Therapy of Prostate Cancer]. [图像引导前列腺癌放射治疗中锥形束ct加铋片照射剂量降低效果评价]。

Nihon Hoshasen Gijutsu Gakkai zasshi Pub Date : 2025-01-01 DOI: 10.6009/jjrt.25-1531

Tatsuya Yoshida, Koji Sasaki, Tomoki Hayakawa, Toshiyuki Kawadai, Takako Shibasaki, Yoshiyuki Kawasaki

{"title":"[Evaluation of Exposure Dose Reduction Effect for Cone-beam Computed Tomography with Bismuth Sheet in Image-guided Radiation Therapy of Prostate Cancer].","authors":"Tatsuya Yoshida, Koji Sasaki, Tomoki Hayakawa, Toshiyuki Kawadai, Takako Shibasaki, Yoshiyuki Kawasaki","doi":"10.6009/jjrt.25-1531","DOIUrl":"10.6009/jjrt.25-1531","url":null,"abstract":"Purpose: Image-guided radiation therapy using cone-beam computed tomography (CBCT) for prostate cancer is problematic due to the increasing exposure dose at each treatment session. This study aimed to evaluate the effect of exposure dose reduction using bismuth sheets for pelvic CBCT.Methods: Using a radiophotoluminescence dosimeter (GD-352M) and CBCT imaging conditions with three X-ray tube rotation angles (292°-88°, 92°-248°, and 92°-88°), absorbed doses were measured in the rectum, anterior and posterior bladder walls, right and left pelvic subcutaneous at 5 cm superior the prostate center of the pelvic phantom and in a testis. Next, the same measurements were performed when these measurement points were covered with a bismuth sheet.Results: The absorbed doses at 92°-248° with the bismuth sheets were reduced by 31.3% from 16.3±0.2 mGy to 11.2±0.2 mGy for the rectum and by 57.1% from 45.0±2.7 mGy to 19.3±1.0 mGy for the testis, which were the lowest among the imaging conditions. Although the anterior and posterior bladder walls were the highest dose at 48.7±11.5 and 20.2±0.4 mGy, the high reduction rates of 42.0% and 36.9%, respectively.Conclusion: From the viewpoint of the exposure risk to the bladder, rectum, and testis, using bismuth sheets and the X-ray tube rotation angle of 92°-248° effectively reduced the exposure dose.","PeriodicalId":74309,"journal":{"name":"Nihon Hoshasen Gijutsu Gakkai zasshi","volume":"81 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143538192","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