Early Denver compound contact scanner produced by the Joseph Holmes, William Wright and Ralph Meyerdirk team. This has a similar design to the one in Glasgow built by Brown and Donald. Howry was at an exhibition in London in 1959 and met up with Brown and Donald to look at their automatic compound contact scanner.

The transducer carriage moved horizontally across the abdomen while the transducer moved mechanically 30 degrees to each side of the perpendicuar. This design soon give way to a new design - the articulated-arm compound contact mechanism with wires and electronic position transducing potentiometers.

Image of the Denver scanner reproduced with permission from Mr. Gerald Posakony.

Back to History of Ultrasound in Obstetrics and Gynecology.