Which change improves temporal resolution during color flow imaging?

Which change improves temporal resolution during color flow imaging?
A . Increase field of view
B . Decrease transmit frequency
C . Decrease packet size
D . Increase line density

View Answer

Answer: C

Explanation:

Temporal resolution is improved by increasing the frame rate. One way to increase the frame rate is by decreasing the packet size (also known as ensemble length) in color Doppler imaging. The packet size refers to the number of pulses used to determine the Doppler shift at each location. A smaller packet size means fewer pulses are required, which allows for quicker data acquisition and thus a higher frame rate. Increasing the field of view, decreasing transmit frequency, and increasing line density would all decrease the frame rate and thus degrade temporal resolution.

Reference: American Registry for Diagnostic Medical Sonography (ARDMS) Sonography Principles and Instrumentation guidelines.