Table 3. Quantitative segmentation results on DSC (95% CI) of the improved DenseUnet for 3 structures in different groups.

Muscle type	Normal	POP2	POP3	POP4
LAM	0.767±0.170 (0.739, 0.796)	0.764±0.182 (0.687, 0.841)	0.748±0.106 (0.726, 0.769)	0.740±0.152 (0.679, 0.801)
EAS	0.736±0.160 (0.708, 0.763)	0.792±0.129 (0.732, 0.852)	0.705±0.177 (0.667, 0.743)	0.557±0.193 (0.464, 0.650)
IOM	0.818±0.159 (0.795, 0.840)	0.865±0.035 (0.848, 0.882)	0.790±0.148 (0.766, 0.814)	0.833±0.054 (0.811, 0.854)
Average	0.779±0.166 (0.764, 0.794)	0.802±0.141 (0.767, 0.838)	0.755±0.149 (0.739, 0.771)	0.727±0.175 (0.685, 0.768)

DSC values are described as means ± standard deviations. Numbers in parentheses are the 95% CIs. DSC, Dice similarity coefficient; CI, confidence interval; POP2, patients with stage 2 pelvic organ prolapse; POP3, patients with stage 3 pelvic organ prolapse; POP4, patients with stage 4 pelvic organ prolapse; LAM, levator ani muscle; EAS, external anal sphincter; IOM, internal obturator muscle.