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The following information is provided to help patients prepare for specific diagnostic imaging tests and procedures:

  • X-Ray: No preparation needed
  • Cardiac Echo or Vascular Ultrasound: No preparation needed
  • Abdominal Ultrasound: Do not eat 6-8 hours prior to your appointment
  • Cardiac Stress Echo / Stress Tests:
    • Take medicines as normal
    • No food for 4 hours prior to your appointment
    • No caffeine for minimum 12 hours prior to your appointment
    • Wear loose comfortable clothing
  • CT Scan:
    • Calcium Scores: No preparation needed
    • Low dose chest CT screening: No preparation needed
    • Is the patient allergic to iodine? If yes, it is recommended that the patient be pre-medicated by their physician
    • Any CT Angiogram or CT with contrast:
      • No food for 4 hours prior to your appointment time
      • Recommended: drink plenty of water the day prior to your appointment
      • May drink some water the day of the appointment
    • Diabetic instructions:
      • Do not take Metformin the day of the appointment
      • Do not take any medications with Metformin (Glucophage) for 48 hours after the intravenous contrast injection
      • Contact your physician prior to resuming this medication
  • Nuclear Medicine:
    • MUGA scan: No preparation needed
    • Viability scan: No food for a minimum of 4 hours prior to appointment
    • Nuclear Stress Test:
      • Patient should continue cardiac medications unless otherwise directed by their physician
      • No food for a minimum of 4-6 hours prior to the appointment
      • No caffeine for a minimum of 12 hours prior to appointment
  • Pulmonary Function Test:
    • Can have a light meal (breakfast/lunch) prior to the appointment
    • No caffeine 4 hours prior to the appointment
    • No breathing medication 4 hours prior to the appointment. If breathing becomes too difficult, please use an inhaler

Patient Stories

Diane Membreno

Diane Membreno was recovering from bunion surgery when a neighbor suggested ice for the swelling. When Diane removed her ice packs the following day, her foot was frostbitten. "I didn't feel it because of the numbing cream," she explains, "but when I saw the purple flesh, I knew something was wrong." 

Read about Diane's story »


Call 469.814.3480 
to refer patients to
the CACC in Plano or McKinney.

Call 1.855.220.0887
to refer patients to the
Comprehensive Wound & Vascular
Center in Denton