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《Modern Medical Imageology》 2013-01
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The Application Study of Coronary Angiography Imaging Using Propective ECG Gating Tecnology of Multi-slice Spiral CT

Jiang Yuzhi Duan Yuting Zhao Lixin Department of Emaging,Liaocheng City People's Hospital of shandoeng 252000  
Purpose:To evaluate the value in showing coronary artery stenosis degree,image quality and radiation dose using propective electrocardiogram(ECG) gating 256-slice spiral computed tomography coronary angiography(CTCA).Materials and Methods:104 patients with suspected or known coronary artery disease(CHD) were divided into two groups which underwent 256 CTCA with prospective or retrospective ECG gating computed tomography coronary angiography(CTCA).Maximum intensityprojection(MIP)、volume rendering(VR)、 Multiplanar reconstruction(MPR),and curved planar reconstruction(CPR)were made to diagnosis the coronary arteries.The image quality and individual radiation exposure dose were estimated.Results:Image quality was not inflused by age,body mass index(BMI).Segments of CTA images were consistent with the lumen evaluation,there were 95.6%(568/594) in prospective ECG gating group,96.5%(614/636) in retrospective ECG gating group,They were similar(P0.05).Segments of CTA images in showing severe stenosis(≥50%) were 69/594 in prospective ECG gating group and 61/636 segments as those of in retrospective ECG gating group.The mean effective radiation dose of prospective ECG-gating group(3.62±0.37) mSv was significantly lower than that of retrospective ECG-gating group(15.18±0.96)mSv,P0.001.Conclusion:Compared with retrospective CTA,prospective CTA has similar performance in showing coronary artery anatomy structure,stenosis degree and image quality,but lower effective radiation dose in patients.
【CateGory Index】: R816.2
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