Production model of the abdominal and vaginal A-mode scanner from Aloka, model SSD-IIC.
The vaginal probe is the one next to the abdominal probe.

Diagramatic representation of the vaginal A-scanner in use to delineate the thickness and regularity of the uterus and cavity. Gestational sacs are assessed in a similar manner.

Source of pictures:
"Ultrasonic diagnosis in Gynecology and Obstetrics" -- by S Mizuno. In Vol 19, no.2, Nippon Sanka Fujinka Gakkai Zasshi pp.171-175, 1967. (in Japanese).

Back to History of Ultrasound in Obstetrics and Gynecology.