Information for St. Dominic’s CT Patients

The St. Dominic CT department strives to provide the best quality images at the lowest radiation dose possible. All of the diagnostic CT scanners at St. Dominic Hospital are accredited every three years by the American College of Radiology (ACR). This ensures our CT scan protocols are reviewed by highly trained physicists, physicians and technologists. We have also been part of the ACR Dose Index Registry since 2011; this registry allows us to benchmark our radiation doses against other leading hospitals and clinics in the nation. We also strive to reduce radiation exposure by yearly pledging to the Image Wisely and Image Gently campaigns. This ensures we are offering our adult and pediatric patient’s radiation doses that are As Low As Reasonable Achievable (ALARA). Patient safety, quality imaging, and the patient experience is not only important to you, it is important to us as well.

What is a CT scan?

CT Prep Instructions for patients:

Nothing to eat or drink after midnight for any IV contrasted study.  Assume that most studies are going to use IV contrast.

If you are having a CT of the abdomen and/or pelvis, pick up oral prep at least one day prior to your exam unless you are having an enterography exam. If you are having a routine abdomen pelvis drink the first bottle before going to bed the night before the exam.  Drink the second bottle 1   hour before your exam. If you are having an enterography study you will drink volumen when you arrive for your scan.

If you can’t pick up the oral prep, you need to come to your exam one hour early.  You will have to drink the prep and wait at least one hour for the drink to digest before having your exam.

If your test is after 12 p.m., you may have something to eat before and no later than 9a.m.

Please inform your doctor of any allergies to IVP dye, IV contrast, X-Ray dye or any type of injectable dyes prior to exam.

Please inform your doctor if you are allergic to barium products as well.

After you CT scan

If you have any side effects after your CT scan please let the technologist know or contact your physician. A radiologist, a doctor specifically trained to read radiologic exams, will read your CT and send the results to your doctor. You will receive the results from your doctor that ordered the CT.

If you have any questions or concerns please call CT 601-200-6154.

Guidelines Prior to Study:

Cardiac CTA cannot be performed simultaneously with another CT exam

For Cardiac CTA, it is preferred that patients have a heart rate that is

Contraindications for cardiac CTA include:

  • Inability to hold breath or cooperate
  • Increased cardiac enzymes
  • Currently in atrial fibrillation
  • Currently heart rhythm with frequent PACs or PVCs
  • Permanent pacemaker/ICD/biventricular device
  • Mechanical valve
  • Creatinine>2.0mg/dL with a GFR
  • History of severe contrast allergy (i.e., difficulty breathing, vomiting, hives, etc.)

Before the Study:

Please follow these instructions in preparation for your exam:

  • Inform RT/RN if you have a pacemaker or defibrillator.
  • Do not take any erectile dysfunction medication (Viagra, Cialis, Levitra,Etc.) for 72 hours prior to your CT scan.
  • Do not consume any form of caffeine (coffee, tea, soda, etc.) or nicotine 8 hoursprior to your study.
  • Do not take any decongestants/antihistamines 8 hours prior to your study.
  • Take the first prescribed 50 mg Metoprolol (Lopressor) pill with 16 ounces of water at bedtime the night prior to your exam and the other 50 mg Metoprolol pill the morning of your exam. (2 doses of 50 mg total)(Inform your physician if you have COPD or asthma prior to taking any beta blockers, such as Metoprolol)
  • Do not eat for 4 hours prior to your exam, but you may drink clear liquids.

During the Study:

  • You will have your blood pressure, heart rate, and oxygen level checked before the CT.
  • A nurse may give you an additional dose of Metoprolol (Lopressor) prior to the scan.
  • To ensure a high quality exam you will need to be perfectly still and hold your breath a few times for a short time (up to 20 seconds).
  • You will have EKG leads attached to your chest to monitor your heart rate.
  • You may have oxygen (via small tubing placed in your nostrils) to help you hold your breath.
  • You may receive one small dissolving nitroglycerine pill or spray under your tongue during the study. This dilates (enlarges) your arteries for a better study.
  • You will have contrast (x-ray dye) injected. A needle will be placed in your right arm inside the elbow area. If you have been told not to have an IV in your right arm (ex. You have had a right mastectomy), inform the technologist and the left arm will be used.

After the study:

  • The radiologist will evaluate your study and issue a report to your doctor.
  • Drink plenty of fluids, and resume your normal diet
  • Do not take the following diabetic medications for 48 hours after your

CT exam: Glucophage, Glucovance, Avandamet, Metaglip, Actoplus  Met,Metformin, Fortamet, Diofen, Riomet, Glumetza, and any other Metformin containingDiabetic medication

  • Metroprolol slows your heart rate and possibly lowers your blood pressure. It is advisable to rest for the remainder of the day, or until

yourheart rate returns to its normal level.

  • If you have trouble breathing, swelling of your tongue, itching, or hives this is most likely related to the contrast dye used for the scan. You will need to be evaluated and treated for allergic reaction.
  • If you are given nitroglycerin, you may experience a temporary headache. This will go away on its own, but if you wish you may take whatever you normally take for a headache.


CT Calcium Score