{"title":"用薄热释光剂量计测量空气腔中的累积效应。","authors":"B Nilsson, P O Schnell","doi":"10.3109/02841867609131777","DOIUrl":null,"url":null,"abstract":"<p><p>The build-up and build-down situation around air cavities of various size in a polystyrene phantom was evaluated by measurements with LiF-Teflon disks with a thickness of about 1.6 X 10(-2) kg/m2. The measurements demonstrate that when irradiating with two opposed beams the surface dose at the cavity (depth 39 mm) is 74% of the maximum dose for 60 Co, 77% for 6 MV and 87% for 42 MV roentgen radiation.</p>","PeriodicalId":7139,"journal":{"name":"Acta radiologica: therapy, physics, biology","volume":"15 5","pages":"427-32"},"PeriodicalIF":0.0000,"publicationDate":"1976-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3109/02841867609131777","citationCount":"22","resultStr":"{\"title\":\"Build-up effects at air cavities measured with thin thermoluminescent dosimeters.\",\"authors\":\"B Nilsson, P O Schnell\",\"doi\":\"10.3109/02841867609131777\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>The build-up and build-down situation around air cavities of various size in a polystyrene phantom was evaluated by measurements with LiF-Teflon disks with a thickness of about 1.6 X 10(-2) kg/m2. The measurements demonstrate that when irradiating with two opposed beams the surface dose at the cavity (depth 39 mm) is 74% of the maximum dose for 60 Co, 77% for 6 MV and 87% for 42 MV roentgen radiation.</p>\",\"PeriodicalId\":7139,\"journal\":{\"name\":\"Acta radiologica: therapy, physics, biology\",\"volume\":\"15 5\",\"pages\":\"427-32\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1976-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.3109/02841867609131777\",\"citationCount\":\"22\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Acta radiologica: therapy, physics, biology\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.3109/02841867609131777\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta radiologica: therapy, physics, biology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3109/02841867609131777","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 22
摘要
通过测量厚度约为1.6 X 10(-2) kg/m2的liff - teflon圆盘，评估了聚苯乙烯模体中不同尺寸的气腔周围的积聚和积聚情况。测量结果表明，当两束相对照射时，腔(深度39 mm)的表面剂量为60 Co最大剂量的74%，6 MV为77%，42 MV为87%。
Build-up effects at air cavities measured with thin thermoluminescent dosimeters.
The build-up and build-down situation around air cavities of various size in a polystyrene phantom was evaluated by measurements with LiF-Teflon disks with a thickness of about 1.6 X 10(-2) kg/m2. The measurements demonstrate that when irradiating with two opposed beams the surface dose at the cavity (depth 39 mm) is 74% of the maximum dose for 60 Co, 77% for 6 MV and 87% for 42 MV roentgen radiation.
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