Gynecologic ultrasonography

Gynecologic ultrasonography or gynecologic sonography refers to the application of medical ultrasonography to the female pelvic organs (specifically the uterus, the ovaries, and the fallopian tubes) as well as the bladder, the adnexa, and the recto-uterine pouch. The procedure may lead to other medically relevant findings in the pelvis.This technique is useful to detect myomas or mullerian malformations.

Routes

The examination can be performed by transabdominal ultrasonography, generally with a full bladder which acts as an acoustic window to achieve better visualization of pelvis organs, or by transvaginal ultrasonography with a specifically designed vaginal transducer. Transvaginal imaging utilizes a higher frequency imaging, which gives better resolution of the ovaries, uterus and endometrium (the fallopian tubes are generally not seen unless distended), but is limited to depth of image penetration, whereas larger lesions reaching into the abdomen are better seen transabdominally. Having a full bladder for the transabdominal portion of the exam is helpful because sound travels through fluid with less attenuation to better visualize the uterus and ovaries which lies posteriorly to the bladder. The procedure is by definition invasive when performed transvaginally. Scans are performed by health care professionals called sonographers, or gynecologists trained in ultrasound.

Applications

Gynecologic sonography is used extensively:

to assess pelvic organs,

to diagnose acute appendicitis

to diagnose and manage gynecologic problems including endometriosis, leiomyoma, adenomyosis, ovarian cysts and lesions,

to identify adnexal masses, including ectopic pregnancy,

to diagnose gynecologic cancer

in infertility treatments to track the response of ovarian follicles to fertility medication (i.e. Pergonal). However, it often underestimates the true ovarian volume.