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Table 2 Differences in the total bone uptake (TBU) between B-SAC and CTAC

From: Bone SPECT-based segmented attenuation correction for quantitative analysis of bone metastasis (B-SAC): comparison with CT-based attenuation correction

  TBU [g] (range) Ratio of TBUs between B-SAC and CTAC
Threshold for metabolic tumor volume B-SAC CTAC Same threshold* 50% in CTAC**
50% 902 ± 375 (359–1617) 821 ± 434 (299–1665) 1.17 ± 0.22 1.17 ± 0.22
55% 743 ± 304 (287–1186) 676 ± 351 (242–1241) 1.17 ± 0.22 0.96 ± 0.19
60% 591 ± 241 (228–838) 537 ± 276 (189–869) 1.17 ± 0.21 0.77 ± 0.17
  1. *Same threshold for metabolic tumor volume in both B-SAC and CTAC
  2. **Threshold for metabolic tumor volume was set at 50% in CTAC