Objective To evaluate the value of clinical application of coronary artery angiography and the influencing factors on image quality with 64-slice spiral CT. Methods 64-slice spiral CT angiography was performed in 77 patients of suspected coronary heart disease(CHD) and stenting.All patients were examined in ordinary scanning with the technique of retrospective electrocardiography gating,and maximum intensity projection(MIP),curved planar reconstruction(CPR)and volume reconstruction technology(VR) were done.The showing rate of coronary artery,the detecting rate of CHD and the influencing factors on image quality were evaluated by CT.Results 64-slice spiral CT could show every branch of coronary artery clearly.Many factors were affected image quality.Conclusion 64- slice spiral CT had significant value in diagnosing coronary artery disease.The image quality was affected by psychological factors ,heart rate and heart rate fluctuation,breath movement,scanning parameter settings,good reconstruction algorithms choiceing. |