Table 1.

Visual lesion characteristics

Score	Pre‐contrast image	Post‐contrast image
1	No abnormality	No observable change from pre‐contrast
2	Small lesions (>10 pixels) on ≤2 slices	Change in SNR and increase in dark region size from pre‐contrast on ≤2 slices
3	>2 slices or medium‐sized lesion (10 < pixels < 20) on ≤2 slices	Medium change in SNR and increase in dark region size from pre‐contrast on ≤2 slices
4	Large lesion (>20 pixels) on >2 slices	Major change in SNR and increase in dark region size from pre‐contrast on >2 slices

Abbreviations: SNR, signal‐to‐noise ratio