MUGA Scan Preparation
For a MUGA scan, minimal patient preparation is required—you should be able to lie still for approximately 20-30 minutes, and if you have a history of cardiac disease or prior cardiotoxic drug exposure, ensure your physician has evaluated your cardiac function beforehand.
Essential Pre-Scan Requirements
Patient Positioning and Comfort
- Ability to remain motionless for the duration of the scan (typically 20-30 minutes) is critical for image quality 1
- Empty your bladder immediately before the scan to maximize comfort during the procedure 2
- If you have claustrophobia, inform the scheduling staff in advance so appropriate accommodations or premedication can be arranged 3
Items to Remove
Remove all metallic objects before scanning 2:
- Jewelry
- Dental prostheses (if removable)
- Clothing with metal zippers or buttons
- You will typically be provided with cotton hospital clothing
Medical History Documentation
Your physician should have documented 4:
- Height and weight (measured accurately for standardized calculations)
- Current medications
- History of cardiac disease or symptoms
- Prior exposure to cardiotoxic chemotherapy or chest radiation
- Any allergies or contrast reactions (if contrast CT is planned)
Specific Clinical Contexts
For Cancer Patients on Cardiotoxic Therapy
If you're undergoing chemotherapy (particularly anthracyclines like doxorubicin or trastuzumab), the MUGA scan is being used to monitor your heart function 1. Your oncologist should have:
- Established baseline cardiac function before starting treatment
- Determined the appropriate surveillance schedule based on your cumulative drug doses and risk factors
No Fasting Required
Unlike FDG-PET scans, MUGA scans do not require fasting since they use technetium-99m labeled red blood cells rather than glucose-based tracers 5, 6.
Day of Procedure Expectations
Intravenous Access
- A small IV line will be placed for radiotracer injection
- The radiotracer (technetium-99m labeled red blood cells) will be administered
- The actual imaging begins shortly after injection
Scan Duration
- Total time in the department: approximately 1-2 hours
- Actual imaging time: 20-30 minutes of lying still
- No delayed imaging is required (unlike some other nuclear medicine studies)
Important Caveats
If you have any of the following, inform your physician:
- Severe bone pain or fractures that would make lying still difficult 3
- Active cardiac symptoms (chest pain, severe shortness of breath) that may require urgent evaluation before elective imaging
- Pregnancy or possibility of pregnancy (radiation exposure consideration)
The scan itself is non-invasive and involves significantly less radiation than many CT scans, making it suitable even for serial monitoring in patients requiring repeated assessments 6, 7.