Which frequency range is typically used for pediatric ultrasound?

• A. 2-5 MHz
• B. 5-14 MHz
• C. 10-20 MHz
• D. 1-3 MHz

Answer: (B)

In pediatric ultrasound, the frequency range of 5-14 MHz is indeed the most commonly utilized. This frequency range strikes a balance between adequate resolution and tissue penetration, which is particularly important when imaging smaller structures in children. Higher frequencies, such as those exceeding 14 MHz, can provide excellent resolution for superficial structures; however, they may not penetrate deeply enough for certain applications in pediatric patients.

On the lower end, frequencies like 2-5 MHz or 1-3 MHz are typically reserved for deeper tissue imaging or adult patients, as these lower frequencies tend to provide less resolution but greater penetration for thicker tissues. In the context of pediatric ultrasound, the frequency range of 5-14 MHz is generally preferred for its ability to clearly visualize anatomical details while still being effective for deeper structures in a child’s smaller body.