The effort of this project is to identity by MRI intraindividual changes in pelvic region topography and to compare those changes with clinically described pelvic shape change calied fixed pelvic nutation, optionaliy to add certain facts. The trial sampie is made from two groups of female subjects. The group a) involves patients with dg. - coccygeal syndrom, shape change is induced by terapheutical input. Healthy women create group b). Fixed nutation is artificially evocated by surface electrostimulation of pelvic floor muscles. In the frame of pilot study (1 subject from each group) bone edge coordinates are achieved and imported into graphical software. Simple 3D models are created for better spatial image and also set of pelvimetry and distance measurements in statě „before" and „after" are doně. Evaluation of the pilot study shows certain congruence with clinical knowledge - in čase of group a) qualitative and in čase of group b) rather quantitative character

        Key words: magnetic resonance imaging, pelvis, pelvic floor muscles, electrostimulation, fixed pelvic nutation