[Initial experiences in the study of the pelvis using nuclear magnetic resonance imaging with 6.36 MHz radiofrequency].

Twenty-four patients with pelvic disease were examined using a resistive magnet operating at a field strength of 0.15 T. and a R.F. frequency of 6.36 MHz. Spin-echo, multiecho (TR = 0.5-2 s; TE = 50-100 ms) and Inversion Recovery techniques (TR = 1.4 s; TI = 0.4 s) were employed. The proliferative processes of the pelvic organs were subdivided into: prostate (adenoma 5 cases, carcinoma 5); bladder (carcinoma 3, lymphoma 1); uterus (fibroma 1, cervical carcinoma 6, endometrial carcinoma 3). All patients were evaluated with conventional methods and had histological diagnosis. The little respiratory motion of pelvic organs allowed to obtain good coronal, sagittal and axial images. The main aspects of normal anatomy and pathology are analized and described. The tissue characterization of normal structures provides good anatomic details; multiplanar images depict the extent of the lesions properly. N.M.R. is an interesting method in evaluating the extension of pelvic masses and staging pelvic tumors.