{"title":"[日本血管造影术和静脉造影术模型入口表面气孔多中心调查]。","authors":"Ryota Hasegawa, Kazuki Noguchi, Kazuya Takeda, Koushi Sakiyama, Masakazu Sato, Kazuki Maekawa, Toshihiro Hayashi, Osamu Tajima, Hajime Sakamoto, Hisaya Sato, Eiji Ishikawa","doi":"10.6009/jjrt.2024-1483","DOIUrl":null,"url":null,"abstract":"<p><strong>Purpose: </strong>In DRLs 2020, the entrance surface air kerma (Ka,e) was set to 17 mGy/min as the reference dose rate in fluoroscopy. But, Ka,e in fluoroscopy for different regions and Ka,e in exposure was not set. A multicenter survey was conducted to evaluate Ka,e by each area.</p><p><strong>Methods: </strong>Ka,e for each area was analyzed for 79 facilities attending this survey (274 machines and 461 protocols). When the protocols were changed by the difference in disease, angiography, or IVR, the difference rate of Ka,e was evaluated. Ka,e before and after modifying the incident air kerma at the patient entrance reference point (Ka,r) and air kerma area product (P<sub>KA</sub>) difference rate were calculated when protocols were changed, considering the DRLs 2020.</p><p><strong>Results: </strong>There were dose differences in Ka,e by each area. Compared to DRLs 2020, 36 protocols from 13 facilities modified their protocols, all of which reduced Ka,e.</p><p><strong>Conclusion: </strong>Although reducing Ka,e does not necessarily reduce Ka,r, and P<sub>KA</sub>, comparison of Ka,e by each area is expected to optimize medical exposure protection, including evaluation of quality control.</p>","PeriodicalId":74309,"journal":{"name":"Nihon Hoshasen Gijutsu Gakkai zasshi","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"[Multicenter Survey on Phantom Entrance Surface Air Kerma of Angiography and IVR in Japan].\",\"authors\":\"Ryota Hasegawa, Kazuki Noguchi, Kazuya Takeda, Koushi Sakiyama, Masakazu Sato, Kazuki Maekawa, Toshihiro Hayashi, Osamu Tajima, Hajime Sakamoto, Hisaya Sato, Eiji Ishikawa\",\"doi\":\"10.6009/jjrt.2024-1483\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Purpose: </strong>In DRLs 2020, the entrance surface air kerma (Ka,e) was set to 17 mGy/min as the reference dose rate in fluoroscopy. But, Ka,e in fluoroscopy for different regions and Ka,e in exposure was not set. A multicenter survey was conducted to evaluate Ka,e by each area.</p><p><strong>Methods: </strong>Ka,e for each area was analyzed for 79 facilities attending this survey (274 machines and 461 protocols). When the protocols were changed by the difference in disease, angiography, or IVR, the difference rate of Ka,e was evaluated. Ka,e before and after modifying the incident air kerma at the patient entrance reference point (Ka,r) and air kerma area product (P<sub>KA</sub>) difference rate were calculated when protocols were changed, considering the DRLs 2020.</p><p><strong>Results: </strong>There were dose differences in Ka,e by each area. Compared to DRLs 2020, 36 protocols from 13 facilities modified their protocols, all of which reduced Ka,e.</p><p><strong>Conclusion: </strong>Although reducing Ka,e does not necessarily reduce Ka,r, and P<sub>KA</sub>, comparison of Ka,e by each area is expected to optimize medical exposure protection, including evaluation of quality control.</p>\",\"PeriodicalId\":74309,\"journal\":{\"name\":\"Nihon Hoshasen Gijutsu Gakkai zasshi\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-10-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Nihon Hoshasen Gijutsu Gakkai zasshi\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.6009/jjrt.2024-1483\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2024/9/12 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nihon Hoshasen Gijutsu Gakkai zasshi","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.6009/jjrt.2024-1483","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/9/12 0:00:00","PubModel":"Epub","JCR":"","JCRName":"","Score":null,"Total":0}
[Multicenter Survey on Phantom Entrance Surface Air Kerma of Angiography and IVR in Japan].
Purpose: In DRLs 2020, the entrance surface air kerma (Ka,e) was set to 17 mGy/min as the reference dose rate in fluoroscopy. But, Ka,e in fluoroscopy for different regions and Ka,e in exposure was not set. A multicenter survey was conducted to evaluate Ka,e by each area.
Methods: Ka,e for each area was analyzed for 79 facilities attending this survey (274 machines and 461 protocols). When the protocols were changed by the difference in disease, angiography, or IVR, the difference rate of Ka,e was evaluated. Ka,e before and after modifying the incident air kerma at the patient entrance reference point (Ka,r) and air kerma area product (PKA) difference rate were calculated when protocols were changed, considering the DRLs 2020.
Results: There were dose differences in Ka,e by each area. Compared to DRLs 2020, 36 protocols from 13 facilities modified their protocols, all of which reduced Ka,e.
Conclusion: Although reducing Ka,e does not necessarily reduce Ka,r, and PKA, comparison of Ka,e by each area is expected to optimize medical exposure protection, including evaluation of quality control.
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