Ultrasound is the imaging method of choice for investigating pelvic organs (the uterus, ovaries and the prostate). It allows for an evaluation of the endometrium and the myometrium in detecting fibroma, and of ovarian lesions, which it is able to characterize (simple cystic or complex solid). The assessment of the prostatic parenchyma is performed using endorectal ultrasound. CT scans are used in evaluating a locoregional disease in neoplasia cases.
MRI is indicated when ultrasound results are ambiguous. It helps differentiate between an exophytic fibroma and an ovarian mass, and to characterize an atypical ovarian mass. MRI has proven to be the preferred method in the staging of cervical neoplasia.