Transducer diameter and focal depth are ____ related.

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Multiple Choice

Transducer diameter and focal depth are ____ related.

Explanation:
In ultrasound focusing, focal depth scales with the transducer’s diameter when the f-number is fixed. The f-number is the ratio of focal length to diameter (f-number = focal length / diameter). If you keep that ratio constant and increase the diameter, the focal length must increase proportionally, so the focus lies deeper. Conversely, reducing the diameter moves the focus closer. So, as diameter grows, focal depth grows in direct proportion.

In ultrasound focusing, focal depth scales with the transducer’s diameter when the f-number is fixed. The f-number is the ratio of focal length to diameter (f-number = focal length / diameter). If you keep that ratio constant and increase the diameter, the focal length must increase proportionally, so the focus lies deeper. Conversely, reducing the diameter moves the focus closer. So, as diameter grows, focal depth grows in direct proportion.

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