Spiral CT scan is a non-invasive, easy access exam that uses x-rays moving rotationally and multiple detectors for fast data acquisition. Subsequently, fine and multiplanar reconstructions are obtained through computer processing. CT scan has many indications. It allows investigation of the brain, lumbar spine, facial bones, sinus, neck/ORL, thorax, abdomen, pelvis, osteoarticular issues, circulatory system (angio-CT of the carotids, detection of cerebral or aortic aneurysm and pulmonary angio-CT, namely to detect a pulmonary embolism).A CT scan may also help evaluate maxillary bones for pre-dental implant study.

In investigations of the spine, CT scans hold a prominent place in post-traumatic evaluation and detection of cervical, dorsal and lumbar fractures. It can also help characterize a bone lesion. As for discal pathologies, CT scans are useful mainly for investigating uncomplicated lumbar pain.