Adequate radiographic demonstraion of the extent of renal injury following blunt abdominal trauma is an important guide to therapy. The diagnostic evaluation of renal injuries usually begins with excretory urogrpahy, but not provide detailed information about the extent of injury. The need for a more accurate noninvasive modality led us to investigate the used of computed tomography. We evaluated with computed tomography and excretory urography 30 selected patients suspected of having major renal injury. Of these patients 11 were also underwent arteriography for assessment fo renal arterial injuries. In this paper, we wish to analyze the result of the above modalites, particulary angiogrpahy and computed tomogrphy. The brief results were as follow. 1. Among 30 patients, 21 cases were male and 9 cases were female. About one third of these occured between the age of 20-29. 2. All cases were nonpenetrating blunt traumas. 3. Renal injuries were categorized into 3 groups. Categor I is minor renal injuries(14 cases) II is major renal injuries (13 cases), and III is catastrophic renal injuries. (3 cases). 4. IVP is the most common inital diagnostic modality and good for screening of patients , but lack of specificity. In our study the specificity is about 33 %. 5. CT is more accurate in detecting hematoma, parenchymal laceration, fracture and extravasaion of urine, but agiography is more confirmative in diagnosis of vaacular injuries. 6. Conservative management was done in 19 cases, 13 cases of category I and 6 cases o fII, Operation was performed in 11 cases : 1 case of category 1, 7 cases of II and 3 cases of III. 7. Associated injuries were noted in 17 cases (57%).