Application value of stress dynamic CT myocardial perfusion imaging combined with coronary CT angiography in diagnosis of ischemic coronary artery disease
WANG Su-yan
Department of Radiology,the First People's Hospital of Shenyang City,Liaoning Province,Shenyang 110041,China
Abstract：Objective To investigate the application value of stress dynamic CT myocardial perfusion imaging (CTMPI)combined with coronary CT angiography (CCTA)in diagnosing myocardial ischemia of coronary heart disease.Methods Forty patients with ischemic coronary artery diseases who were admitted to our hospital from January to December 2017 were selected as the study subjects.They were examined by CCTA alone and stress dynamic CT-MPI combined with CCTA.The former was classified into control group,and the latter was categorized into observation group,20 cases in each group.The dosage of contrast agent and radiation dose,the proportion of luminal stenosis due to plaque,plaque length,and the diagnostic rates of the two groups were compared.Results Compared with the control group,the dosage of contrast agent in the observation group was lesser with a significant difference(P＜0.05）.The radiation dose was lower(P＜0.05）.The proportion of luminal stenosis due to plaque was higher than that in the control group with a significant difference (P＜0.05）.The plaque in the observation group was greatly longer than that of the control group (P＜0.05）.The diagnostic rate of the observation group was significantly higher than that of the control group with a statistical difference (P＜0.05）.Conclusion For patients with myocardial ischemia of coronary heart disease,application of stress dynamic CT-MPI and CCTA can effectively confirm the coronary artery stenosis and plaque lesions in a small dosage of contrast agent,a low radiation dose,and greatly increase the clinical diagnosis rate.
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