J4 ›› 2011, Vol. 37 ›› Issue (5): 931-934.

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Clinical application of ECG-gated 256-slice CT angiography for diagnosis of congenital heart disease

TIAN Xin-hua1,LIU Jian-hua1,GONG Ting-ting1,GENG Li-li2,SUN Yong3   

  1. 1.Department of Radiology,Second Hospital,Jilin University,Changchun 130041,China;2.Department of Radiology,Second Central Hospital,Jilin 132001,China;3.Department of Radiology,Affiliated Hospital,Kunming Medical College,Kunming 650101,China
  • Received:2011-05-08 Online:2011-09-28 Published:2011-09-28

Abstract:

Objective To investigate the clinical application of ECG-gated 256-slice CT angiography for diagnosis of congenital heart disease,and to evaluate the relationship of the image quality and radiation dose between prospective ECG-gated and retrospective ECG-gated cardiac CT angiography (CTA). Methods Sixty patients who doubt congenital heart disease underwent cardiac CTA,and they were randomly divided into two groups. Thirty patients in group A underwent prospective ECG-gated cardiac CTA,and thirty patients in group B underwent retrospective ECG-gated cardiac CTA. Then the homogeneous enhancement of vascular structures,stair-step artifact,overall image quality and radiation dose were evaluated. Results The homogeneous enhancement of vascular structures were 2.8±0.3 and 2.7±0.6,respectively,in two groups;and there was no  statistical significance (P>0.05). The stair-step artifact were 3.0±0.9 and 3.1±0.9, respectively,in two groups;and there was also no  statistical significance (P>0.05). The overall image quality were 3.0±0.8 and 3.1±0.9,respectively,i n two groups;and there was  statistical significance (P>0.05). However,the effective dose were (5.24±0.52) mSv and (16.68±1.49) mSv, respectively, in  two groups;and there was  statistical significance (P<0.001). Conclusion Compared with retrospective ECG-gated cardiac CTA,prospective ECG-gated cardiac CTA can reduce radiation dose about 68.6%,while maintaining the image quality which could be made diagnosis.

Key words: tomography;radiation dose;congenital heart disease

CLC Number: 

  • R541.1