Diagnostic imaging, also called medical imaging, is the technique and process of imaging the interior of a body for clinical intervention. It is also used to visually represent the function of organs and tissues. Diagnostic imaging reveals the internal structures hidden by the skin and the bones using technologies like electromagnetic radiation, ultrasonic waves, radiopharmaceuticals, etc. Other technologies which are used in diagnostic imaging include endoscopy, elastography and thermography. Imaging procedures like computed tomography (CT) of the abdomen and pelvis is used to detect diseases of the small bowel, colon and other internal organs and is often used to determine the cause of unexplained pain. This book outlines the processes and applications of diagnostic imaging of the abdomen and the pelvis in detail. It traces the progress in this field and highlights some of its key concepts and applications. This book includes contributions of experts and scientists which will provide innovative insights into this field.