how to prepare for a CT scan

The preparation depends on which part of the body is being scanned.
For examinations of the chest, abdomen and pelvis you may be asked to undress and put on a dressing gown.
If you wear clothes that have no metallic buttons, zips, fasteners etc then you will not need to change into a gown.
For examinations of the head you will be asked to remove earrings, hairclips and glasses.
For some scans you will be asked not to eat for 4 hours prior to the scan.
For other scans you can eat and drink normally.
The instructions will be described clearly in your appointment letter.
For examinations of the abdomen and pelvis you will be asked to drink up to a litre of fluid in the hour prior to the scan.
This helps to identify the stomach and bowel on the CT images.
For CT scans of the pelvis you may need to have a full bladder.