When choosing a lower-frequency transducer to image a highly attenuating structure, what trade-off are you making?

When choosing a lower-frequency transducer to image a highly attenuating structure, what trade-off are you making?

• A. Decreased penetration for increased resolution
• B. Decreased beam intensity for longer wavelengths
• C. Decreased spatial resolution for improved penetration
• D. Increased beam refraction for higher sound speed

Answer: (C)

Lower frequency imaging gives you deeper penetration because attenuation grows with frequency, so signals pass through highly attenuating structures more effectively. The trade-off is in resolution: longer wavelengths associated with lower frequencies blur fine detail, reducing both axial and lateral resolution. So you gain the ability to image deeper, but you sacrifice image sharpness and detail.

Lower frequency imaging gives you deeper penetration because attenuation grows with frequency, so signals pass through highly attenuating structures more effectively. The trade-off is in resolution: longer wavelengths associated with lower frequencies blur fine detail, reducing both axial and lateral resolution. So you gain the ability to image deeper, but you sacrifice image sharpness and detail.