Fig. 3
From: Pelvic floor parameters predict postpartum stress urinary incontinence: a prospective MRI study
Schematic diagram of pelvic floor measurements. a Axial T2-weighted images. LHA, levator hiatus area. b–f Median sagittal T2-weighted images. H line, puborectal hiatus line; M line, muscular pelvic floor relaxation line; B-PCL, bladder-pubococcygeal line; U-PCL, uterus-pubococcygeal line; FUL, functional urethral length; LPA, levator plate angle; AUA, anterior angle of the urethra; RVA, retrovesicourethral angle; all the parameters were measured at rest and straining respectively; h, i bladder neck descent is defined as the difference in distance from the bladder neck to the PCL line at rest and straining. Negative value was taken if the bladder neck was located below PCL. j, incomplete bladder neck closure in a primiparous incontinent woman manifested as bladder neck funnel (arrows)