What is the recommended frequency range for therapeutic ultrasound?

The recommended frequency range for therapeutic ultrasound is 1 to 3 MHz. This frequency range is particularly effective for various therapeutic applications due to its ability to penetrate tissue effectively. Frequencies within this range are commonly used in physical therapy and rehabilitation to promote tissue healing, relieve pain, and improve mobility.

Using ultrasound at 1 to 3 MHz allows the sound waves to penetrate to effective depths where they can produce thermal effects, promoting blood flow and facilitating tissue repair processes. This range strikes a balance between penetration depth and therapeutic effects, making it ideal for targeting both superficial and some deeper tissues without excessive heat generation, which could occur with higher frequency ultrasound.

In contrast, frequencies below 1 MHz are typically used for deeper tissue applications, while those above 3 MHz may not penetrate deeply enough and can be more suitable for superficial treatments. Frequencies above 5 MHz are generally not recommended for therapeutic ultrasound as they are associated with higher risks of superficial tissue heating and can be less effective for therapeutic purposes.