Table 4 Quality assessment of lesion conspicuity of 8 FLLs at polychromatic and VMIs with variable DRI value in large phantom
|  | High contrast FLLs (n = 160) | Low contrast FLLs (n = 160) | ||||||
|---|---|---|---|---|---|---|---|---|
DRI 16 (n = 40) | DRI 19 (n = 40) | DRI 22 (n = 40) | DRI 25 (n = 40) | DRI 16 (n = 40) | DRI 19 (n = 40) | DRI 22 (n = 40) | DRI 25 (n = 40) | |
|  | Overall (n = 320) | |||||||
Polychromatic | 4.5 (0.76) | 4.4 (0.82) | 4.4 (0.82) | 4.55 (0.76) | 2.5 (0.89) | 2.8 (0.95) | 2.85 (1.0) | 3.15 (1.14) |
VMI†| 4.6 (0.68) | 4.6 (0.76) | 4.6 (0.68) | 4.6 (0.68) | 3.0 (1.00) | 3.3 (1.16) | 3.2 (1.3) | 3.4 (1.23) |
P-value | 0.08 | 0.18 | 0.04* | 0.56 | 0.01* | 0.02* | 0.05 | 0.06 |
Hyper-attenuating (n = 160) | ||||||||
Polychromatic | 4.4 (0.84) | 4.5 (0.85) | 4.5 (0.85) | 4.6 (0.84) | 2.4 (1.1) | 2.7 (1.06) | 2.8 (1.23) | 3.2 (1.14) |
VMI†| 4.6 (0.7) | 4.6 (0.7) | 4.6 (0.7) | 4.6 (0.7) | 2.9 (1.1) | 3.2 (1.14) | 3.2 (1.31) | 3.4 (1.27) |
P-value | 0.16 | 0.32 | 0.32 | 1 | 0.59 | 0.06 | 0.04* | 0.31 |
Hypo-attenuating (n = 160) | ||||||||
Polychromatic | 4.5 (0.71) | 4.3 (0.82) | 4.3 (0.82) | 4.5 (0.71) | 2.6 (0.7) | 2.7 (0.88) | 2.9 (0.88) | 3.2 (1.35) |
VMI†| 4.6 (0.7) | 4.5 (0.85) | 4.6 (0.7) | 4.6 (0.69) | 3.1 (0.99) | 3.3 (1.25) | 3.2 (1.4) | 3.4 (1.27) |
P-value | 0.32 | 0.32 | 0.08 | 0.32 | 0.06 | 0.16 | 0.28 | 0.16 |