Patient preparation for medical imaging depends on many factors, including which test will be given and which parts of the body will be scanned.
For mammography — There is no particular preparation required for mammography. You will be asked to wear a special hospital gown for the exam.
For ultrasound — Some ultrasound exams require no preparation. Others require that you stop eating or drinking for up to 12 hours before the exam. Some require that your bladder be full. When your ultrasound is scheduled, ask your doctor for instructions for your particular situation.
For CT scan — Many CT scans can be conducted while you are fully dressed. Others require you to wear a hospital gown. You will be asked to remove jewelry or other objects that might interfere with the scan. Depending on the purpose of the scan and the part of the body being addressed, you may be asked to refrain from eating and drinking for a period of time before the exam, especially if a contrast solution is being used. This will help to eliminate any nausea you might feel. Ask your doctor for details.
For MRI — Prior to an MRI, you will be asked to remove jewelry or other metal objects that might interfere with the scan. If a contrast solution is being used, your doctor may ask you to fast for a few hours before the exam. Please tell your doctor if you have any metal implants, such as a pacemaker, dental implants or pins to repair broken bones. Also tell your doctor if you are claustrophobic and he or she can prescribe something to lessen your anxiety.