The Value Of 640-slice Dynamic Volume CT In Vessel Density Ratio And Plaque Calcium Score

Objective:In this study,we investigated the value of 640-slice dynamic volume CT in vessel density ratio and plaque calcium score.Methods: We studied 50 patients with coronary CT angiography by 640-slice dynamic volume CT and coronary angiography. All the Patients were diagnosed as coronary heart disease. The patients of unqualified image quality were excluded, and eventually 28 patients were enrolled,of which 18 occurred ACS within 1 year. According to the CAG results, the subjects were divided into mild stenosis group, moderate stenosis group and severe stenosis group. According to the CAG results and clinical symptoms, the subjects were divided into ACS group and non-ACS group. Then the plaque calcium score and vessel density ratio were calculated to evaluate the coronary artery stenosis and plaque stability.Results:The Mild stenosis group had 21 patches. The moderate stenosis group had 15 patches. And the severe stenosis group had 18 patches. Statistical analysis revealed that the plaque calcium score had significant differences between mild stenosis group and severe stenosis group(p<0.01), and the plaque calcium score had significant differences between moderate stenosis group and severe stenosis group(p<0.01). The ACS group had 18 patches. And the non-ACS group had 40 patches. Statistical analysis revealed that vessel density ratio between the two groups showed significant differences(p<0.05).Conclusion:640-slice dynamic volume CT plaque calcium score and vessel density ratio are reliable in the evaluation of coronary artery stenosis and plaque stability.