Evaluation of segmentation performance in the test dataset
After training the model, we examined its performance in predicting the ROIs in the test dataset. Segmentation accuracy was evaluated using the DSC as follows. (1) A statistical measure of spatial overlap also defined as DSC was derived as 2TP/(FP+2TP+FN), where TP, FP and FN are the numbers of true positive, false positive and false negative detections, respectively. (2) Intersection of union (IOU) was defined as TP/(FP+TP+FN), which evaluates the numbers of TP and FN detections. (3) Average Symmetric Surface Distance (ASSD) was defined as ASSD(A,B) = 