ACR clinical service accreditation Guidelines titled the Practice Parameters and Technical Standards help advance the science of radiology by improving the quality of imaging service to patients. Since the use of computed tomography (CT) has rapidly increased since its introduction in the 1970s, physicians see benefits of using computerized tomography (CT) scanning in their patient care management. It is possible nowadays to perform more examinations on time. However, extending the scope of some examinations, as well as introducing some new techniques occurs sometimes. The ease of acquisition of images results sometimes in unnecessary exposure of patients to radiation, particularly in developed countries. Furthermore, organ doses from CT scanning are considerably larger than those from corresponding conventional X-ray. The CT scan is the most appropriate modality of receive a traumatic patients. The CT scan is also very effective in diagnosis of traumatic cases with high resolution in real time mode and visualization of fine details with or without the use of contrast medium. CT is now a standard diagnostic tool for patient’s pathologies detection, trauma, renal calculi, appendicitis, and heart conditions. The speed, accuracy and availability of CT technology have rapidly raised the volume of CT scans performed in patients, despite the fact that CT scanning delivers a higher radiation dose to the patient than other available procedures.