The authors recall the indications for the medical imaging examinations most frequently used in adult urology, depending on the organ, syndrome or disease to be investigated. The indications for intravenous urography (IVU) are increasingly rare, but it remains the reference examination to study the pyelocaliceal cavities. Ultrasonography, combined with KUB, generally provides a diagnosis, especially in the emergency setting. Computed tomography (CT) is the reference examination for the investigation of all types of renal lesions, but also lesions of other organs, especially in the case of neoplastic disease.