Several imaging techniques can be used for visualization of the kidneys dependent on the indication. Ultrasound (US), computerized tomography (CT), and magnetic resonance imaging (MRI) are most commonly used. US is a safe, relatively inexpensive, noninvasive, and widely available imaging method. It is therefore often used as a screening tool, especially for nephrolithiasis, hydronephrosis, renal masses, and perirenal processes. Often, in case of an abnormal finding, a CT or MRI follows for more detailed information about the extent, the anatomical landmarks, and eventually surgical treatment planning.