The time marker system uses an oscillator as a clock to provide spikes at specified time intervals either on the trace baseline or on a separate trace immediately adjacent to ... This selected velocity is usually that of water (1, 500 m/ sec) or of saline (1, 530 m/sec). ... The equipment instruction manual should be read carefully to determine the calibration velocity used, as it varies with different manufacturers.
|Title||:||Ultrasonography of the Eye and Orbit|
|Author||:||D. Jackson Coleman, Frederic L. Lizzi, Robert Lionel Jack|