Abstract: Objective To investigate the effectiveness of different cardiovascular imaging techniques in detecting ventricular volume and cardiac function in patients with diabetic cardiomyopathy(DCM). 
Methods A total of 120 patients with DCM diagnosed in our hospital were collected. Echocardiography, cardiac computed tomography(CCT) and cardiac magnetic resonance(CMR) were used to detect the left and right ventricular end diastolic volume(EDV), end systolic volume(ESV), stroke volume(SV) and ejection fraction(EF). Statistical analysis was used to detect the difference of the results of the three detection methods. 
Results After comparing the patient′s cardiac function parameters, there was no significant difference in the left ventricular volume of DCM patients detected by echocardiography, but the ESV of the right ventricle was significantly smaller than that of CMR(P＜0.05). For all of the patients, the EF detected by echocardiography was generally higher than that of CMR(P＜0.05). When EF＞50%, there was no significant difference between the results of echocardiography and CMR, but when EF＜50%, the results of echocardiography were significantly higher than those of CMR(P＜0.05). CCT and CMR showed good consistency in the detection of ventricular volume and cardiac function in patients with DCM; When EF＜35%, the detection result of CCT was significantly higher than that of CMR(P＜0.05). The three methods showed good consistency between and within observers. 
Conclusion Echocardiography, CCT imaging and CMR have certain differences in the detection results of patients′ cardiac function, which, therefore, should be used by clinicians according to the actual situation.

Key words: diabetic cardiomyopathies, echocardiography, magnetic resonance imaging