Which parameter is determined by the source?

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Multiple Choice

Which parameter is determined by the source?

Explanation:
The frequency is determined by the source. The transducer and its driving electronics set how many cycles per second are emitted, so changing probes or drive settings changes the transmitted frequency. In contrast, the speed of sound is a property of the tissue itself (depends on compressibility and density), not something the source can alter. Imaging depth results from how long the system listens after each pulse (time window) and the actual speed of sound in the tissue, along with the operator’s depth setting. So the parameter set by the source is the frequency.

The frequency is determined by the source. The transducer and its driving electronics set how many cycles per second are emitted, so changing probes or drive settings changes the transmitted frequency. In contrast, the speed of sound is a property of the tissue itself (depends on compressibility and density), not something the source can alter. Imaging depth results from how long the system listens after each pulse (time window) and the actual speed of sound in the tissue, along with the operator’s depth setting. So the parameter set by the source is the frequency.

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