Table 2.
Summary of maximum standardised uptake value (SUVmax), signal-to-noise (SNR), signal-to-background (SBR) and percentage difference in SUVmax across the entire cohort and classified according to histopathology
| All (n=112) | Positive (n=25) | Negative (n=87) | ||||
|---|---|---|---|---|---|---|
| OSEM | BPL | OSEM | BPL | OSEM | BPL | |
| SUVmax | ||||||
| Mean | 3.2 | 4.0 | 5.2 | 7.0 | 2.6 | 3.1 |
| Median | 2.4 | 2.9 | 3.4 | 4.4 | 2.3 | 2.8 |
| Range | 1.0 – 17.0 | 1.0 – 25.3 | 1.3 – 17.0 | 1.3 – 25.3 | 1.0 – 6.9 | 1.0 – 8.3 |
| Wilcoxon p value | <0.0001 | <0.0001 | <0.0001 | |||
| SNR | ||||||
| Mean | 27.7 | 40.9 | 43.4 | 73.7 | 23.2 | 31.5 |
| Median | 21.2 | 27.4 | 36.0 | 38.4 | 20.7 | 25.8 |
| Range | 6.0 – 131.0 | 5.2 – 281.4 | 9.1 – 131.0 | 16.1 – 281.4 | 6.0 – 67.5 | 5.2 – 106.5 |
| Wilcoxon p value | <0.0001 | <0.0001 | <0.0001 | |||
| SBR | ||||||
| Mean | 2.2 | 2.6 | 3.6 | 4.5 | 1.8 | 2.0 |
| Median | 1.8 | 1.9 | 2.9 | 3.0 | 1.7 | 1.9 |
| Range | 0.6 – 10.2 | 0.6 – 18.1 | 0.8 – 10.2 | 0.8 – 18.1 | 0.6 – 4.1 | 0.6 – 5.4 |
| Wilcoxon p value | <0.0001 | <0.001 | <0.0001 | |||
| %ΔSUVmax | ||||||
| Mean | 16.4 % | 23.7 % | 14.3% | |||
| Median | 14.6 % | 24.2 % | 13.4% | |||
| Range | -11.8 – 87.0 % | -3.0 – 87.0 % | -11.8 – 48.4% | |||
| Spearman p value (correlation vs size) | 0.0001 | <0.0001 | 0.125 | |||
| Mann-Whitney U p value | - | 0.032 | ||||
BPL Bayesian penalised likelihood reconstruction, OSEM ordered subset expectation maximum