Table 4. Volume comparison between the manual and the improved DenseUnet segmentation.

Muscle type	Volume of ground truth	Predicted volume	P value*
LAM	30,560 [5,961]	26,781 [7,188]	0.247
EAS	11,179 [4,679]	10,928 [2,571]	0.853
IOM	86,154 [27,199]	81,605 [24,474]	0.739

Values are reported in medians with interquartile ranges. Numbers in the parentheses are the interquartile ranges. The unit of volume is mm³. *, the Mann-Whitney test was used for the P value computation. P<0.05 is considered statistically significant. LAM, levator ani muscle; EAS, external anal sphincter; IOM, internal obturator muscle.