Construction of a nomogram model to predict technical difficulty in performing laparoscopic sphincter-preserving radical resection for rectal cancer

Figure 2 Diagram of three-dimensional reconstruction of the pelvis in a female patient. A: Midsagittal lateral view: anterior-posterior diameter of pelvic inlet (AB), anterior-posterior diameter of mid-pelvis (CD), anterior-posterior diameter of pelvic outlet (CE), superior-inferior diameter of the pubic symphysis (AC), sacrococcygeal distance (BE), superior-inferior diameter of sacrum (BD), superior pubococcygeal diameter (AE), anterior-posterior sacropubic distance (FG), sacrococcygeal-pubic angle (α), and sacropubic angle (β); B: Anterior-posterior view: transverse diameter of pelvic inlet (PQ), interischial spine diameter (LM); C: Posterior-anterior view: interischial spine diameter (LM), interischial tuberosity diameter (NO).