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Table 2 Mean ± SD and 95% CI of TBR value and LME range indicated by PET/CT and MSS

From: Quantitative evaluation of range and metabolic activity of hepatic alveolar echinococcosis lesion microenvironment using PET/CT and multi-site sampling method

Group Description TBR value PET/CT indicated LME range (mm) MSS indicated LME range (mm)
Calcification degree Necrosis degree Mean±SD 95% CI Mean±SD 95% CI Mean±SD 95% CI
A (-) (-) 5.1±1.9 3.9~6.4 14.9±3.9 12.5~17.4 17.9±4.9 13.3~22.4
B (++) (-) 2.7±1.2 2.0~3.4 10.6±1.5 9.7~11.4 13.0±2.7 9.6~16.4
C (+) (+) 4.2±1.2 3.6~4.9 12.3±1.1 11.7~12.9 11.9±2.6 9.7~14.0
D (++) (+) 2.7±0.7 2.3~3.2 7.8±1.6 6.8~8.8 6.0±2.2 3.2~8.8
E (+) (++) 4.6±1.2 3.8~5.3 11.1±2.3 9.6~12.6 11.0±4.1 5.8~16.2
F (++) (++) 2.9±1.1 2.1~3.8 7.0±0.4 6.7~7.3 6.0±2.2 3.2~8.8
C+E (+) Not specified 4.4±1.2 3.9~4.8 11.8±1.8 11.1~12.5 11.5±3.2 9.6~13.4
B+D+F (++) Not specified 2.8±1.0 2.4~3.1 8.7±2.0 8.0~9.4 8.3±4.1 6.1~10.6
A+B Not specified (-) 3.8±1.9 3.0~4.6 12.6±3.6 11.1~14.0 15.8±4.7 12.9~18.8
C+D Not specified (+) 3.6±1.2 3.1~4.1 10.4±2.6 9.4~11.4 9.6±3.8 7.3~11.9
Sum (A~F) 3.7±1.6 3.4~4.1 10.8±3.2 10.1~11.6 11.4±5.2 9.6~13.2
  1. TBR tumor-to-background ratio of maximum standard uptake value of LME and background liver, LME lesion microenvironment, MSS multi-stie sampling method, SD standard division, 95% CI 95% confidence interval of the mean