How long does a cat scan test takes?

A cat scan (computed tomography scan) exam usually takes between 15 and 20 minutes to complete. However, the total time required for a cat scan may vary depending on the size of the area being scanned, the complexity of the scan, and the type of scanner being used. For example, a head CT scan may take longer than a chest CT scan. Additionally, the time it takes to review and interpret the results of the scan may also add time to the overall procedure.