Table 1.

Reasons for performing a repeat CT.

Poor quality/unacceptable images, including CTs with poorly timed contrast, non-contrasted scans of the chest/abdomen/pelvis, no neck reconstructions, or blurry images from excessive motion artifact.

Possible missed injury, including patients with cervical spine fractures that needed a CT angiogram of the neck or those patients with pelvic fractures, lower rib fractures or spine fractures that needed CT imaging of their abdomen/pelvis.

Incompatible software, including images that could not be loaded, windowed, scrolled, or viewed satisfactorily due to software issues.

Additional studies were needed for patients who had incomplete imaging, including CTs of the upper abdomen that did not include the pelvis or a patient with an adequate CT chest, but also needed an abdomen/pelvis scan.

Progression of injury, including patients who arrived with a worse clinical picture, inconsistent with their imaging.

Physician preference/other served as a miscellaneous category to repeat a scan for an unclassified reason.