Every patient aged 30-100 referred for abdominal CT examination with IV contrast injection will be included in this study (total 300 patients.Prior to the examination relevant clinical data including history of hypertension and predisposing conditions for atherosclerotic disease, will be investigated. The patient will undergo conventional CT with no special procedures. The images will be review by the radiologist for the presence of renal arteries calcifications, renal arteries stenosis,plaque location, plaque burden and characterization and secondary renal pathology.