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Prep Instructions for CT, MRI and Ultrasound

CT

CTYour exam may require both oral and intravenous contrast materials. If you have a history of iodine or contrast allergy, your referring physician should provide you with medication to take prior to your appointment.

If you are having an abdominal exam, avoid food and drink for 4 hours prior to your procedure. Necessary medications may be taken as prescribed with as little water as possible. If your exam requires oral contrast, please plan to arrive 90 minutes prior to your scheduled appointment. During this time a technologist will explain the entire examination process and answer any questions you may have.

If you are diabetic and taking Glucophage, please follow these instructions:

  • Take Glucophage on the day of the procedure
  • Do not take Glucophage for two days after the procedure

If you are having a CT with contrast, you must have a current creatinine level drawn within the last 30 days or at least 24 hours before your exam if any of the following criteria apply:

  • 70 years of age or older
  • Hypertension
  • Diabetes
  • Renal disease or renal problems
  • Family history of renal failure
  • Patient currently on dialysis or a history of being on dialysis
MRI

If you are having an abdominal exam, avoid food and drink for 4 hours prior to your procedure. Necessary medications may be taken as prescribed with as little water as possible.

Plan to arrive 30 minutes prior to your scheduled appoint-ment so a technologist can explain the entire process before the examination and answer any questions you may have. Wear comfortable, loose-fitting clothing although you may be asked to change into scrubs or a gown for your exam. Exams vary in length of time depending on the scope of the test.

Any metal objects will be stored in a safe and secure area while your exam is being performed. During your exam, a technologist will observe you at all times. An intercom system is built into the MRI so that you can communicate with the technologist throughout the exam.

If you are having a MRI with contrast, you must have a current creatinine level drawn within the last 30 days or at least 24 hours before your exam if any of the following criteria apply:

  • 70 years of age or older
  • Hypertension
  • Diabetes
  • Renal disease or renal problems
  • Family history of renal failure
  • Patient currently on dialysis or a history of being on dialysis
Ultrasound

Abdominal – Do not eat or drink anything 8 hours prior to your exam.
Pelvic and Fetal – Drink 32 ounces of water 1 hour before your exam and do not urinate until after the exam is complete.
Renal – Drink 16 ounces of water 30 minutes before your exam and do not urinate until after the exam is complete.