Schematics of Quantum®'s first color doppler scanner:
Abstracted from :
Alfred V. Persson, Raymond L. Powis in: "Recent Advances in Imaging and Evaluation of Blood Flow using Ultrasound" - Medical Clinics of North America, vol. 70. no.6, November 1986, 1241-1252.
Back to History of Ultrasound in Obstetrics and Gynecology.