The aim of this study is to evaluate the clinical usefulness of 64-slice multidetector coronary CT angiography (MDCTA) in renal transplant recipients who had no previous coronary artery disease (CAD). Primary endpoint is to assess the prevalence and severity of coronary artery disease in patients post-transplant 6 to 12 months. CAD can be diagnosed noninvasively with similar accuracy of coronary angiography using MDCTA. Early detection and intervention of CAD may provide survival benefit in renal transplant recipients.

Inclusion Criteria:

1. age ≥ 40 yrs
2. renal transplant recipient at post-transplant 6 to 12 months
3. stable graft renal function: CKD-EPI (Chronic Kidney Disease Epidemiology Collaboration) equation ≥45 mL/min/1.75m2
4. patients who had no previous CAD

Exclusion Criteria:

1. unstable graft renal function
2. History of acute kidney injury within 3 months
3. Allergic history to contrast agent
4. Irregular heart beat
5. Multiorgan transplant recipients
6. Pregnancy
7. Patients who do not consent to this study