To compare the accuracy of volume rendering (VRT) and maximumintensity projection (MIP) techniques in sixteen-row multidetector computed tomography angiography (MDCTA) and correlate with per operative findings.Sixteen-row MDCTA scans were performed in 85 renal and 15 hepatic transplant patients between 10th October, 2004 and 30th July, 2006. 80 – 100 cc of Injection Iohexol (300 mgI/mL) was injected for renal studies and in dose of 2ml./Kg. body weight for hepatic studies. Saline bolus chase was used in all the studies. Ultrathin 1.25 mm contiguous axial sections were acquired and submillimeter sections reconstructed with 50% overlap. Postprocessing ncluded VRT, MIP and multiplanar reconstruction techniques. The raw-data set was anonymized for the two blinded trained radiologists in all the patients and they performed VRT and MIP reconstructions independently, which were compared with surgical findings. Interobserver agreement between the two reviewers and between MDCTA post-processing techniques and surgical findings was quantified by using weighted K statistics. MDCTA scans were technically satisfactory in all the patients and showed clear delineation of the renal and hepatic arteries. Discordance between the two post-processing techniques was seen in 62% patients and especially for thin accessory arteries. Correlation between MIP and operative findings was excellent for renal and hepatic arteries (K = 0.843). Agreement between VRT and surgical findings was good (K = 0.710). MIP is superior to VRT in delineating the vascular anatomy accurately and should be the standard first post-processing technique in MDCTA study.