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Question 94/99

Which action would increase the frame rate?

A. Increasing the sector width

B. Increasing the number of lines per frame

C. Decreasing the logarithmic compression

D. Decreasing the number of focal zones

Correct Answer: D

The frame rate in ultrasound imaging is influenced by several factors, including the number of focal zones.
Each focal zone requires additional transmission and reception cycles, thus decreasing the frame rate. By decreasing the number of focal zones, the system requires fewer cycles per frame, which increases the frame rate. This enhances the temporal resolution, making it easier to capture fast-moving structures in real-time imaging.
References:
ARDMS Sonography Principles & Instrumentation Guidelines
Hagen-Ansert SL. Textbook of Diagnostic Ultrasonography. 8th ed. St. Louis, MO: Mosby; 2017.

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