In all cases, your physician should be consulted prior to CT examination, as CT examinations should only be performed on medical advice due to radiation exposure.
The native examination does not require special preparation on the part of the patient, however, in justified cases, a contrast-enhanced examination may be performed. Kidney function laboratory results showing creatinine and urea values are also required to perform a contrast-enhanced studies. In the case of a contrast-enhanced examination, you should not eat for 6 hours before the examination.
Prior to a contrast-enhanced CT scan, metformin medications for diabetes should be discontinued 48 hours prior to the examination and resumed 48 hours after the examination.