Background: Kidneys are the third most common solid organ injury in blunt abdominal trauma. Objectives: to assess the impact of different MDCT phases in diagnosis and staging of renal trauma after either blunt or penetrating trauma and management of lesions. Methods: This study carried on 20 patients with renal trauma . The cases are attending to Al ahrar education hospital & referred to the radiology department from the Urology and General Surgery Departments .The patients' ages ranged between 8 and 64 years .The patients were presenting with hematuria after blunt or penetrating trauma . Renal injuries were graded according to the last modification of AAST grading system from grade I to grade V. Results: This study included 20 patients, among the 20 patients included in our study, As regard to grades of trauma there were (9) Patients (45%) had grade 4 and 6 patients had grade 3 (30%) each of grade one and two present (2) patients 10% ,and grade 5 were in only one patient (5%). Conclusion: CT become the imaging modality of choice for the evaluation of renal trauma and other associated injuries, providing the essential anatomic and functional information necessary to determine the type and extent of parenchymal, vascular, or collecting system injuries with high sensitivity (90–100%). Improvements in CT technology are advantageous for the patient selection for the best treatment and thus to prevent failure of non-operative management.