Technical improvement for ultrasonic study of the endometrium.

Ultrasound imaging has evolved technically. Large-aperture, multielement array systems achieve improved spatial, contrast, and temporal resolutions. These advances are useful for detailed study of the endometrium, especially for early detection of neoplastic disease and premalignant risk factors, assessment and management of infertility, monitoring the course of early pregnancy at--and about--the time of implantation and, possibly, for increasing knowledge about symptomatic conditions, such as dysmenorrhea. Referring physicians should be aware of the level of study that instrumentation advances have now made possible.