Coronary artery calcium measurement with multi-detector row CT: In vitro assessment of effect of radiation dose

被引：47
作者：
Hong, C
Bae, KT
Pilgram, TK
Suh, J
Bradley, D
机构：
[1] Washington Univ, Sch Med, Edward Mallinckrodt Inst Radiol, St Louis, MO 63110 USA
[2] Siemens Med Syst Inc, Iselin, NJ 08830 USA
来源：
RADIOLOGY | 2002年 / 225卷 / 03期
关键词：
computed tomography (CT); radiation exposure; coronary vessels; calcification; CT;
D O I：
10.1148/radiol.2253011871
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：
The authors assessed in vitro the effect of radiation dose on coronary artery calcium quantification with multi-detector row computed tomography. A cardiac phantom with calcified cylinders was scanned at various milliampere second settings (20-160 mAs). A clear tendency was found for image noise to decrease as tube current increased (P < .001). No tendency was found for the Agatson score or calcium volume and mass errors to vary with tube current. Calcium measurements were not significantly affected by the choice of tube current. Calcium mass error was strongly correlated with calcium volume error (P < .001). The calcium mass measurement was more accurate and less variable than the calcium volume measurement. (C) RSNA, 2002.
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收藏
页码：901 / 906
页数：6
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