Can pelvic ultrasound detect tubo ovarian abscess?

Yes: Check out http://emedicine.Medscape.Com/article/404537-overview. Pelvic ultrasound is used to detect tubo-ovarian abscess and can also be useful for guiding interventional radiologic therapeutic options. In other words, we often use ultrasound to assist in draining pus.

Yes: In fact, pelvic ultrasound in the form of a transvaginal ultrasound (ultrasound probe placed in the vagina) is usually the study of choice to detect tubo-ovarian abscess. This study has a sensitivity (likelihood of detection) of very roughly 85%...But like any ultrasound study can vary based on the experience of the sonographer.