What is the effect of low-frequency ultrasound transducers?

• A. Higher image resolution
• B. Greater depth of tissue penetration
• C. Improved visualization of superficial structures
• D. Shorter imaging times

Answer: (B)

Low-frequency ultrasound transducers are designed to transmit sound waves at lower frequencies, which allows them to penetrate deeper into tissues. This characteristic is especially beneficial when imaging deeper structures within the body. The trade-off, however, is that while low-frequency ultrasound can reach greater depths, it does not provide the same level of detail or resolution as higher frequency transducers. Higher frequency ultrasound offers better image resolution but is limited to superficial structures due to its reduced penetration capability. Therefore, the ability to achieve greater depth of tissue penetration is the defining feature of low-frequency transducers, making it the correct answer.