______ frequency transducers produce shorter wavelength sound, which in turn creates images of superior quality.

• A. Lower
• B. Mid
• C. Ultra
• D. Higher

Answer: (D)

The amount of detail in an ultrasound image is tied to the wavelength of the sound. In tissue, the speed of sound is fairly constant, so wavelength equals speed divided by frequency. Increasing the frequency makes the wavelength shorter. A shorter wavelength lets the system distinguish finer features along the beam path, which improves axial resolution and yields sharper, more detailed images. This is especially noticeable for shallow structures, where higher-frequency probes can provide clearer detail. The trade-off is that higher frequency attenuates more quickly, reducing how deep the sound can penetrate, so higher-frequency transducers are best for superficial imaging.