Fig. 5From: Ra-223 SPECT for semi-quantitative analysis in comparison with Tc-99m HMDP SPECT: phantom study and initial clinical experience a–c Comparison of background count (patient-based), lesion count and lesion-to-background ratio between the MEGP and HEGP collimators. MEGP medium-energy general purpose, HEGP high-energy general purposeBack to article page