The calibration of dosimetry instruments used in interventional radiology

被引：0
|
作者：
Rannikko, S [1 ]
机构：
[1] Univ Helsinki, Inst Biomed, FIN-00014 Helsinki, Finland
来源：
DOSE AND IMAGE QUALITY IN DIGITAL IMAGING AND INTERVENTIONAL RADIOLOGY (DIMOND) | 2001年
关键词：
D O I：
暂无
中图分类号：
R8 [特种医学]; R445 [影像诊断学];
学科分类号：
1002 ; 100207 ; 1009 ;
摘要：
No general agreement about the definition of the patient dose exists. As regards the radiation health risk, the doses to specific organs. H-i, are the ultimate measures for a patient dose. Values of the calibration measurand, H-i, are provided only by calculational means. Out of the whole process of patient dose determination, the instruments to measure X ray spectra, FSD, field dimensions and K-a can be calibrated. X ray quality is derived from the total filtration and kV value. The actual dynamic and X ray quality ranges shall be considered when air kerma and DAP meters are calibrated. A DAP meter measurement averages the uniform radiation field specific for the X ray tube assembly used and for the beam shaping technique performed. Therefore, a DAP meter calibrated on site is preferable for patient dosimetry in interventional radiology.
引用
收藏
页码：151 / 153
页数：3
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