Directions for all patients:
If you are over 60 years old, or a diabetic patient and will be receiving an iodine injections, we MUST have a recent BUN/Creatinine level from your physician’s office drawn within the past three months.
Allergy preparation for iodine allergy (seafood/Shellfish Allergy)
Consult your physician
Take 40 mg tablet of prednisone at bedtime the evening before your exam
Take 40 mg tablet of prednisone and 50 mg diphenhydramine (Benadryl) 2 hours prior to your appointment.
You must have someone drive you
Preparation for diabetic patients:
Do not take any form of metformin the morning of your test (this includes Glucophage, Glucovane, Glumetza, Metalip, Pradimet, Januvamet, Adandamet, Fortamet, Riomet, etc.) 2 days (48 hours) following your exam you may resume your metformin. If you have had any renal issues in the past, you may want to contact your physician.
Dressing for your exam:
Please remove all metal objects, including jewelry, belts, zippers, buckles, etc.
What to expect during your exam:
CT scans are painless and, with newer machines, typically take only a 30-60 minutes.
During the CT scan:
CT scanners are shaped like a large doughnut standing on its side. You lie on a narrow table that slides into the “doughnut hole,” which is called a gantry. Straps and pillows may help you stay in position. During a CT scan of the head, the table may be fitted with a special cradle that holds your head still.
The table will move slowly through the gantry during the CT scan, as the gantry rotates in a circle around you. Each rotation yields several images of thin slices of your body. You may hear buzzing, clicking and whirring noises.
A technologist will be nearby, in a separate room. You will be able to communicate with the technologist. The technologist may ask you to hold your breath at certain points to avoid blurring the images.
After the CT scan:
After the exam you can return to your normal routine. If you were given a contrast material, you may receive special instructions. In some cases, you may be asked to wait for a short time before leaving to ensure that you feel well after the exam. After the scan, you’ll likely be told to drink lots of fluids to help your kidneys remove the contrast material from your body.
Previous images if available will help the radiologist determine if any changes have occurred since your last x-ray.