You have been asked to perform an ultrasound study of a structure located about 3cm below the skin surface. Which transducer frequency range would be most appropriate for this study?

You have been asked to perform an ultrasound study of a structure located about 3cm below the skin surface. Which transducer frequency range would be most appropriate for this study?

• A. 10-12 MHz
• B. 2-5 MHz
• C. 4-8 MHz
• D. 8-10 MHz

Answer: (A)

When imaging, higher frequency transducers give better spatial resolution but don’t penetrate as deeply. A structure about 3 centimeters beneath the skin is relatively shallow, so you want the detail that a high-frequency probe provides while still reaching that depth. Among common options, the 10–12 MHz range offers the finest resolution suitable for roughly 3 cm depth. Lower frequencies such as 2–5 MHz penetrate deeper but sacrifice image detail, which is undesirable for a shallow target. So the best choice is the highest frequency range available for this depth, 10–12 MHz.

When imaging, higher frequency transducers give better spatial resolution but don’t penetrate as deeply. A structure about 3 centimeters beneath the skin is relatively shallow, so you want the detail that a high-frequency probe provides while still reaching that depth. Among common options, the 10–12 MHz range offers the finest resolution suitable for roughly 3 cm depth. Lower frequencies such as 2–5 MHz penetrate deeper but sacrifice image detail, which is undesirable for a shallow target. So the best choice is the highest frequency range available for this depth, 10–12 MHz.