Objective: In chronic renal failure patients under long-term hemodialysis, native(graft) arteriovenous fistulas (AVFs) are more favored than a hemodialysis catheter because of their lower morbidity and better prognosis. Even if the AVF successfully matures, late fistula failure and other complications might occur. Evaluation the entire AVF structure requires contrast medium and even multiple punctures. MDCT is a fast, noninvasive examination with comfirmed accuracy. The purpose of our study is to serve as a primer to familiarize radiologist and technician with the issues related to AVF evaluation and scanning at MDCT.