Fig. 2.

Example femoral articular cartilage segmentation results using our modified U-Net in healthy volunteer knee ultrasound images. The original two-dimensional ultrasound images, manual segmentations, and algorithm segmentations are shown in the columns from left to right. Each row shows a different performance level based on Dice similarity coefficient (DSC), including mean plus one standard deviation (top row), mean (middle row), and mean minus one standard deviation (bottom row).