Two phantom images obtained with maximum gain and power using two transducers suggest which conclusion?

Two phantom images obtained with maximum gain and power using two transducers suggest which conclusion?

• A. Transducer A has less penetration than transducer B
• B. Lateral resolution best with transducer B
• C. Axial resolution best with transducer B
• D. Both B and C

Answer: (A)

Penetration depth depends on the transducer’s frequency and design, not on how high you crank the gain or the power. When two transducers are tested on a phantom with maximum gain and power, you’re leveling the amplification so the image depth you see reflects the probe’s inherent ability to reach deeper tissues. If one transducer cannot reveal deeper phantom features that the other shows under the same settings, that transducer has less penetration. Lateral and axial resolution relate to beam geometry and frequency and aren’t directly determined by gain/power in this setup, so you can’t infer those from this comparison alone. Therefore, the transducer producing the shallower image has less penetration than the other.

Penetration depth depends on the transducer’s frequency and design, not on how high you crank the gain or the power. When two transducers are tested on a phantom with maximum gain and power, you’re leveling the amplification so the image depth you see reflects the probe’s inherent ability to reach deeper tissues. If one transducer cannot reveal deeper phantom features that the other shows under the same settings, that transducer has less penetration. Lateral and axial resolution relate to beam geometry and frequency and aren’t directly determined by gain/power in this setup, so you can’t infer those from this comparison alone. Therefore, the transducer producing the shallower image has less penetration than the other.