What PET-CT Does — and Doesn't Do
Positron emission tomography combined with CT (PET-CT) detects metabolically active tissue. Cancer cells consume more glucose than normal cells, so a fluorinated glucose tracer (FDG) lights up tumors on the scan.
PET-CT is excellent for:
- Staging known cancers (NSCLC, lymphoma, head/neck, esophageal, colorectal)
- Restaging after treatment
- Evaluating suspicious findings on conventional imaging
PET-CT is NOT a great first-line screening tool for asymptomatic adults — false positives lead to unnecessary biopsies. The American College of Preventive Medicine and most Chinese expert panels do not recommend PET-CT for general screening in low-risk patients.
When It Makes Sense as Screening
- Strong family history of cancer (Lynch syndrome, BRCA, Li-Fraumeni)
- Prior cancer survivor wanting whole-body restaging
- Smokers over age 50 with abnormal chest CT
- Workplace or environmental high-risk exposure
For everyone else, a tiered approach (chest low-dose CT, abdominal ultrasound, age-appropriate colonoscopy and gastroscopy, Pap smear, mammogram) is more cost-effective. See our executive health checkup guide for tiered packages.
Cost in China
- Whole-body PET-CT (with FDG tracer): ¥7,500–12,000 (USD 1,050–1,680)
- PET-MRI (specialized centers): ¥12,000–18,000 (USD 1,680–2,500)
- Compare US: $3,500–7,000 typically
The Procedure Day
- 4–6 hour pre-scan fast (water OK)
- FDG tracer IV injection
- 60-minute uptake period (you sit quietly in a private room)
- 30-minute scan
- Same-day preliminary read; full report within 24 hours
You can resume normal activity immediately. Avoid close contact with pregnant women or young children for 6 hours due to residual radioactivity.
Reading the Report
PET-CT reports include SUV (Standardized Uptake Value) measurements. SUVmax above 2.5 in soft tissue is suspicious; above 5.0 is highly suspicious. Always have findings reviewed by an oncologist — not just a radiologist — for clinical context. Our coordination service includes a follow-up consultation with the partner hospital's oncology team.
Combining with Other Imaging
Many patients combine PET-CT with brain MRI (PET-CT's sensitivity in the brain is limited due to background uptake). Total package cost ¥10,000–14,000 (USD 1,400–1,960). Hospital stay: outpatient, 1 day.
