Figure 1

Parameters on mid-sagittal magnetic resonance imaging before (A, C) and 10 days after (B, D) robot-assisted radical prostatectomy. (A, B) The pelvic outlet (PO) (dashed red line) is defined as the line between the lowest end of the pubic bone and the tip of the coccyx. DMU-PO (red bidirectional arrowheads) is the distance from the distal end of the membranous urethra (DMU) to the midline of the PO. (C, D) Bladder attachment (BA) is defined as the upper edge of the attachment between the anterior bladder wall and abdominal wall. Pubic symphysis (PS) is defined as the upper edge of the PS. BA-PS (blue line) is the distance from the BA to the PS. Prostate length (PL) (yellow line). PS-to-prostate apex length (PAL) (orange bidirectional arrowheads) is defined as the distance between the extension lines of the suprapubic ridge line (dashed blue line) and the prostate apically. Membranous urethral length (MUL) (green line). Bladder neck to PS (BN-PS) (brown bidirectional arrowheads) is defined as the distance between the extension lines of the suprapubic ridge line and the lowest end of the bladder neck.