Comprehensive and Detailed Explanation From Exact Extract:
A larger sample volume collects Doppler signals from a wider region, which can include multiple velocities and noise. This leads to a broader spectrum (spectral broadening) and may introduce additional noise into the signal.
According to sonography instrumentation reference:
“Increasing the sample volume size increases the likelihood of including multiple velocity components and noise, resulting in spectral broadening and reduced spectral clarity.”
Therefore, the correct answer is B: Increased noise.
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