Which parameter directly influences acoustic exposure?

Which parameter directly influences acoustic exposure?

• A. Transmit power
• B. Gain
• C. TGC
• D. Frame averaging

Answer: (A)

Acoustic exposure is determined by the energy actually emitted into the tissue. The transmit power sets how much energy the transducer sends with each pulse, so increasing transmit power directly increases the acoustic intensity and the exposure. Gain and TGC affect how echoes are amplified after reception, influencing image brightness but not the energy delivered to tissue. Frame averaging is a processing step that combines frames, which also doesn’t change emitted energy.

Acoustic exposure is determined by the energy actually emitted into the tissue. The transmit power sets how much energy the transducer sends with each pulse, so increasing transmit power directly increases the acoustic intensity and the exposure.

Gain and TGC affect how echoes are amplified after reception, influencing image brightness but not the energy delivered to tissue. Frame averaging is a processing step that combines frames, which also doesn’t change emitted energy.