What is effected by increasing the color scale?

What is effected by increasing the color scale?
A . The Nyquist limit is increased
B . More colors are displayed
C . The color box width decreases
D . The color priority decreases

View Answer

Answer: A

Explanation:

The Nyquist limit, which is the maximum detectable velocity before aliasing occurs, is directly related to the pulse repetition frequency (PRF). Increasing the color scale on the ultrasound machine effectively increases the PRF. When the PRF is increased, the Nyquist limit is also increased, allowing for the measurement of higher velocities without aliasing.

Reference: ARDMS Sonography Principles and Instrumentation guidelines Kremkau, F. W. (2015). Diagnostic Ultrasound: Principles and Instruments. Elsevier.