{"title":"利用重金属滤光片优化腰椎成像的光束质量：一项幻影模型研究。","authors":"Chihiro Koide, Seiichi Murakami","doi":"10.1093/rpd/ncaf100","DOIUrl":null,"url":null,"abstract":"<p><p>In radiological imaging, much research has been conducted on tube voltage and additional filters to reduce radiation exposure. In this study, the usefulness of heavy metal filters in lumbar spine imaging to maintain image quality and reduce radiation dose was investigated. A human-body phantom was irradiated with various combinations of tube voltages (70, 75, 80, 85, and 90 kV) and filters (Cu, Gd, Ho, Yb, W). For all beam qualities, the mAs value was adjusted so that the amount of CsI fluorescence at each dose after passing through the phantom was the same, and the contrast-to-noise ratio (CNR) and entrance-surface air dose (ESD) were measured. At 80 kV-Gd, the ESD was reduced by 34% while maintaining the CNR. The results showed that 80 kV-Gd gave the optimal beam quality for anterior-posterior lumbar spine imaging of patients with a standard body type.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":""},"PeriodicalIF":0.7000,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Optimization of beam quality for lumbar spine imaging with heavy metal filters: a phantom model study.\",\"authors\":\"Chihiro Koide, Seiichi Murakami\",\"doi\":\"10.1093/rpd/ncaf100\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>In radiological imaging, much research has been conducted on tube voltage and additional filters to reduce radiation exposure. In this study, the usefulness of heavy metal filters in lumbar spine imaging to maintain image quality and reduce radiation dose was investigated. A human-body phantom was irradiated with various combinations of tube voltages (70, 75, 80, 85, and 90 kV) and filters (Cu, Gd, Ho, Yb, W). For all beam qualities, the mAs value was adjusted so that the amount of CsI fluorescence at each dose after passing through the phantom was the same, and the contrast-to-noise ratio (CNR) and entrance-surface air dose (ESD) were measured. At 80 kV-Gd, the ESD was reduced by 34% while maintaining the CNR. The results showed that 80 kV-Gd gave the optimal beam quality for anterior-posterior lumbar spine imaging of patients with a standard body type.</p>\",\"PeriodicalId\":20795,\"journal\":{\"name\":\"Radiation protection dosimetry\",\"volume\":\" \",\"pages\":\"\"},\"PeriodicalIF\":0.7000,\"publicationDate\":\"2025-09-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Radiation protection dosimetry\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://doi.org/10.1093/rpd/ncaf100\",\"RegionNum\":4,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Radiation protection dosimetry","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1093/rpd/ncaf100","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
Optimization of beam quality for lumbar spine imaging with heavy metal filters: a phantom model study.
In radiological imaging, much research has been conducted on tube voltage and additional filters to reduce radiation exposure. In this study, the usefulness of heavy metal filters in lumbar spine imaging to maintain image quality and reduce radiation dose was investigated. A human-body phantom was irradiated with various combinations of tube voltages (70, 75, 80, 85, and 90 kV) and filters (Cu, Gd, Ho, Yb, W). For all beam qualities, the mAs value was adjusted so that the amount of CsI fluorescence at each dose after passing through the phantom was the same, and the contrast-to-noise ratio (CNR) and entrance-surface air dose (ESD) were measured. At 80 kV-Gd, the ESD was reduced by 34% while maintaining the CNR. The results showed that 80 kV-Gd gave the optimal beam quality for anterior-posterior lumbar spine imaging of patients with a standard body type.
期刊介绍：
Radiation Protection Dosimetry covers all aspects of personal and environmental dosimetry and monitoring, for both ionising and non-ionising radiations. This includes biological aspects, physical concepts, biophysical dosimetry, external and internal personal dosimetry and monitoring, environmental and workplace monitoring, accident dosimetry, and dosimetry related to the protection of patients. Particular emphasis is placed on papers covering the fundamentals of dosimetry; units, radiation quantities and conversion factors. Papers covering archaeological dating are included only if the fundamental measurement method or technique, such as thermoluminescence, has direct application to personal dosimetry measurements. Papers covering the dosimetric aspects of radon or other naturally occurring radioactive materials and low level radiation are included. Animal experiments and ecological sample measurements are not included unless there is a significant relevant content reason.
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