Feasibility of tube current modulation based on the chest circumference in coronary CT angiography
10.3760/cma.j.issn.0254-5098.2014.10.017
- VernacularTitle:基于胸围的管电流调制技术在冠状动脉CT造影应用的可行性探讨
- Author:
Yanhai CUI
;
Meiping HUANG
;
Jinglei LI
;
Hui LIU
;
Changhong LIANG
;
Junhui ZHENG
- Publication Type:Journal Article
- Keywords:
Coronary artery disease;
Radiation dose;
Computed tomography;
X-ray tomography
- From:
Chinese Journal of Radiological Medicine and Protection
2014;34(10):783-786
- CountryChina
- Language:Chinese
-
Abstract:
Objective To establish a function model to modulate the tube current according to the chest circumference at Coronary CTA scan,and to evaluate the feasibility of using the function model individually.Methods Sixty-eight consecutive patients who underwent thoracic scan with automatic current modulation were studied to establish a function model of tube current and chest circumference.The other 64 consecutive patients underwent coronary CTA scan using the new function model.The image quality was scored,and the noise,tube current and radiation dose were recorded and statistically evaluated.Results The POW function model was the best one to adjust tuber current to the chest circumference (R2 =0.691,P ＜ 0.05).The mean image quality score,noise,tube current,radiation dose (CTDIvol) and dose-length product (DLP) were (3.38±0.72) scores,(31.02 ±3.97) HU,(390.63± 89.30) mA,(34.83±10.72) mGy,(751.67 ±175.16) mGy·cm,respectively.Conclusions Tube current modulation based on the chest circumference would be feasible to reduce the radiation dose individually in coronary CT angiography.
