ultra-, ult-

(Latin: beyond, on the other side; excessive, to an extreme degree)

ultrasonographer
Anyone who performs and interprets ultrasonographic examinations.
ultrasonography
1. A technique that makes use of echoes of ultrasound pulses to delineate objects or areas of different density within the body, especially, for diagnostic purposes.
2. The location, measurement, or delineation of deep structures by measuring the reflection or transmission of high frequency or ultrasonic waves.

Computer calculation of the distance to the sound-reflecting or absorbing surface plus the known orientation of the sound beam gives a two-dimensional image. Also: sonography.

ultrasound
ultratechnical
ultratherm
A short-wave diathermy machine.
ultrathin
ultraviolet
ultravirtuous