Fig. 8From: Ra-223 SPECT for semi-quantitative analysis in comparison with Tc-99m HMDP SPECT: phantom study and initial clinical experienceCoexistence of bowel uptake and bone metastasis in the lumbar spine revealed with Ra-223 SPECT (patient no. 6). SPECT (a) and SPECT/CT fused images (b) show that uptake in a bone metastasis at the fourth lumbar vertebra (arrow) is weak compared to adjacent bowel uptake. The corresponding Tc-99m HMDP SPECT/CT image (c) shows no bowel uptake. HMDP hydroxymethylene diphosphonateBack to article page