Table 2.
Selected radiomics features in A, V and A + V models
| Model | Selected features (Total features) |
Individual features | Coefficients |
|---|---|---|---|
| A | 4 (180) | Intercept | −0.269 |
| A_Max Intensity | −0.581 | ||
| A_LongRunLowGrayLevelEmphasis_angle135_offset1 | −0.440 | ||
| A_Maximum3DDiameter | 0.236 | ||
| A_SurfaceVolumeRatio | −0.648 | ||
| V | 8 (180) | Intercept | −0.335 |
| V_Percentile5 | 4.855 | ||
| V_Quantile0.5 | −0.838 | ||
| V_Quantile0.975 | 0.215 | ||
| V_StdDeviation | 1.925 | ||
| V_Uniformity | 0.599 | ||
| V_LongRunHighGrayLevelEmphasis_angle0_offset1 | −0.287 | ||
| V_ShortRunEmphasis_angle45_offset1 | 0.110 | ||
| V_IntensityVariability | 0.316 | ||
| A + V | 7 (360) | Intercept | −0.257 |
| A_MaxIntensity | −0.566 | ||
| A_Quantile0.975 | −0.206 | ||
| A_LongRunLowGrayLevelEmphasis_angle135_offset1 | −0.412 | ||
| A_Maximum3DDiameter | 0.213 | ||
| A_SurfaceVolumeRatio | −0.731 | ||
| V_Quantile0.975 | 0.612 | ||
| V_LongRunHighGrayLevelEmphasis_angle0_offset1 | −0.154 |
Note: A, V and A + V indicate the predicted model based on arterial phase images, venous phase images and the combination of arterial phase and venous phase images, respectively. The prefix “A_” and “V_” represent the features from arterial phase images and venous phase images. For the suffix of “_angle(n)_offset(m)”, n means the rotation angle (i.e., 0 or 45) and m represent the displacement vectors (distance to the neighbor pixel, i.e., 7)