Test OverviewA pelvic ultrasound uses sound waves to make a picture of the organs and structures in the lower belly (pelvis). A pelvic ultrasound looks at: Organs and structures that are solid and uniform, like the uterus, ovaries, or prostate gland, or are fluid-filled, like the bladder, show up clearly on a pelvic ultrasound. Bones or air-filled organs, like the intestines, do not show up well on an ultrasound and may keep other organs from being seen clearly. Pelvic ultrasound can be done three ways: transabdominal, transrectal, and transvaginal. - Transabdominal ultrasound. A small handheld device called a transducer is passed back and forth over the lower belly. A transabdominal ultrasound is commonly done in women to look for large uterine fibroids or other problems.
- Transrectal ultrasound. The transducer is shaped to fit into the rectum. A transrectal ultrasound is the most common test to look at the male pelvic organs, such as the prostate and seminal vesicles. Sometimes, a small sample of tissue (biopsy) may be taken with small tools inserted through the rectum during a transrectal ultrasound.
- Transvaginal ultrasound. The transducer is shaped to fit into a woman's vagina. A woman may have both transabdominal and transvaginal ultrasounds to look at the whole pelvic area. A transvaginal ultrasound is done to look for problems with fertility. In rare cases, a hysterosonogram is done to look at the inside of the uterus by filling the uterus with fluid during a transvaginal ultrasound. Sometimes, a small sample of tissue (biopsy) may be taken with small tools inserted through the vagina during a transvaginal ultrasound. See ultrasound images of ovarian cysts
 .
In all three types of pelvic ultrasound, the transducer sends the reflected sound waves to a computer, which makes them into a picture that is shown on a video screen. Ultrasound pictures or videos may be saved as a permanent record. |