64-slice spirl CT scanning dose study in different lumbar acquisition pat-terns
- VernacularTitle:腰椎64排螺旋CT不同采集模式的剂量研究
- Author:
Qicai JIN
1
;
Quanming ZHAO
Author Information
1. 浙江省义乌市中心医院放射科
- Keywords:
64-MDCT;
Acquisition pattern;
CT dose index;
Effective dose
- From:
China Modern Doctor
2014;(14):56-58
- CountryChina
- Language:Chinese
-
Abstract:
Objective Compared the scan doses of the 64 multidetector CT (64-MDCT) in three different lumbar ac-quisition patterns, to determine the optimized one. Methods The water phantom was scanned by the 64-MDCT, and three groups were divided according to acquisition patterns: group A (128 ×0.625 mm), group B (48 ×0.625 mm), and group C (40×0.625 mm). For every group, the water phantom was scanned for 40 times. The volume of CT dose index (CTDIvol), the DLP and the effective dose were calculated and recorded. One-way ANOVA test was used to compare mean values. Results According to the values of CTDIvol, DLP, and effective dose, the three groups were ordered as follows, group A (128×0.625mm)>group B (48×0.625mm)>group C (40×0.625mm). In group C, the values of effective dose were reduced 17.45%and 10.32%, respectively, in comparison with that in group A and group B. Conclusion The 40×0.625 mm is the optimized pattern which had minimum radiation dose.
