Common Sources of Errors in Measurement of SUVs
| Error | Effect on tumor SUV |
|---|---|
| Paravenous 18F-FDG injection, residual activity in syringe | Incorrectly low SUV because area under plasma time–activity curve is smaller |
| No decay correction of injected activity | Incorrectly low SUV |
| Incorrect cross-calibration of scanner and dose calibrator | Incorrectly low or high SUV, depending on error of calibration factor |
| Variable uptake period (time between injection and imaging) | Higher SUV with longer uptake period |