M mode

M mode

[′em ‚mōd]

(acoustics)

A modification of the A mode of ultrasonic medical tomography used to display the movement of time-varying echo-producing structures by intensity-modulating the trace as it is swept slowly across the oscilloscope screen in a direction at right angles to the fast time-base sweep.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.