Application value of automatic tube current modulation with noise reduc-tion in low dose CT with 64-slices spiral dual-source CT
- VernacularTitle:64层双源CT管电流自动调节技术配合降噪处理在胸部低剂量CT中的应用价值
- Author:
Shujun CHEN
1
;
Yujin XU
;
Weijun WANG
;
Xianxing LI
;
Haitao JIANG
Author Information
1. 浙江省肿瘤医院放射科
- Keywords:
Low-dose;
Tomography;
X-ray computed;
Automatic tube current modulation;
Image quality
- From:
China Modern Doctor
2015;(10):113-116
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the application value of automatic tube current modulation (ATCM) in low dose chest scaning with 64-slices spiral dual-resource CT. Methods Randomly selected healthy people to participate in our hospital from March 2014 to July 2014 in subjects with chest CT examination were 200, 100,received low dose spiral CT examination,as the A group;the other 100 underwent routine CT plain scan,as the B group,All CT images were analyzed by two radiologists with double blind method.Image quality scores (IQS)of lung apex,middle lung and lower lung were made,the image standard deviation(SD)was measured,and the CTDIvol was also recorded,and the statistical analysis was performed. Results SD values in lung apex,middle and lower lungs was (34.34±2.17),(30.63±0.74),(30.74±1.21)in group A,and (36.82±2.51)、(34.15±1.98),(31.69±1.93 )in group B,as well as the corresponding IQS of these three sites were(1.83±0.36),(1.59±0.38),(1.64±0.34)in group A,and(2.31±0.47),(1.68±0.42),(1.73±0.48)in group B,respectively. SD value and IQS of group A were lower than those of group B in lung apex(P<0.05). Conclu-sion The application of ATCM in low dose chest CT scanning plus noise suppression can provide more homogeneous images with better image quality.
