Endometrial thickness is a key topic in ultrasound. A lot of sonograms are done to look at the endometrial thickness, particularly of post-menopausal women who are bleeding.
The measurement techniques that are used are endovaginal. This is not absolutely mandatory, but I personally would be very reluctant to draw professional conclusions without actually looking at an endovaginal scan.
In that measurement, you want to be sure that you identify this lucent band of tissue which represents the inner layer of myometrium.
So you want to measure from the edge of the bright reflector, to the opposite edge of the bright reflector that will constitute the endometrial thickness.
Evaluating Endometrial Thickness in Premenopausal Women
In normal premenopausal women, at the time around their menses or after their menses or after their menses is completed, their endometrium is thin usually in the 1 to 4 mm range.
As they work their way up towards ovulation and the proliferative phase, it generally measures from 4 to 8 mm.
Eight millimeters and after, they have ovulated and the endometrium becomes secretory, and it is up to 16 mm, it is still normal. So premenopausal women can have quite a thick endometrium without being abnormal
In part II we will look at evaluating endometrial thickness with ultrasound in further detail.
Author: Roy A. Filly, MD
Diagnostic Imaging Review: For Residents, Fellows and Radiologists
Female Pelvis Section
Tags: ALL, CT, CTA, diagnosing endometriosis, diagnostic, Diagnostic Imaging, Endometrial Thickness, endometriosis, female pelvis, imaging, MI, PE, rad, radiologist, scan, scanning, sonogram, ultrasound