Figure 4: Anatomical preparation of the transcutaneous course of puncture to the seminal vesicles used for the CT- or MR- guided balloon dilation of the ejaculatory ducts. UB (urinary bladder), SN (sciatic nerve), U (ureter), VD (vas deferens), SV (seminal vesicle), R (rectum), LAM (levator ani muscle), STL (sacrotuberal ligament), PN (pudendal nerve), IAF (ischioanal fossa), EAS (external anal sphincter).