Whole Body PET-CT Scan: Everything You Need to Know

What is a Whole Body PET-CT Scan?

A Whole Body PET-CT Scan is an advanced imaging technique that combines Positron Emission Tomography (PET) and Computed Tomography (CT) to detect diseases at a cellular level. It is primarily used for cancer detection, staging, and monitoring treatment response.

Why is a PET-CT Scan Done?

✔ Cancer Diagnosis & Staging – Identifies tumors and determines their spread.
✔ Treatment Response Monitoring – Evaluates effectiveness of chemotherapy or radiation.
✔ Neurological Disorders – Helps detect conditions like Alzheimer’s and epilepsy.
✔ Heart Disease Assessment – Identifies damaged heart tissue.

How Does it Work?

1. A small amount of radioactive tracer (FDG-18) is injected into the body.

2. The tracer highlights abnormal metabolic activity in cells.

3. The PET scanner captures images, and the CT scan provides anatomical details.

4. Combined results help doctors make precise diagnoses.

Preparation Guidelines

✅ Fasting: Avoid eating for 4-6 hours before the scan.
✅ Hydration: Drink plenty of water unless instructed otherwise.
✅ Medication: Inform your doctor about any medications you’re taking.
✅ Diabetic Patients: Special instructions may apply—consult your doctor.
✅ Avoid Strenuous Activity: No heavy exercise 24 hours before the scan.

Procedure Duration

⏳ The entire process takes 2-3 hours, including preparation and scanning.

Is It Safe?

Yes! The radiation exposure is minimal and generally safe. The tracer naturally exits the body within a few hours.

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