Hi @camaro. The evaluation code will select 3 2D slices in the inline direction (x) and 3 slices in the xline direction (y). This will be done for each prediction volume in the test dataset. SSIM will be calculated for each of these 2D slices in the test dataset. The highest and lowest SSIM values will be dropped. The remaining values will be averaged for a final score.
Please review this post to understand the data shapes.
Onward Team