What frequency is characterized as having a more superficial effect in ultrasound therapy?

In ultrasound therapy, the frequency of the sound waves used plays a significant role in determining the depth of tissue penetration and the therapeutic effects produced. Higher frequencies are associated with more superficial effects on tissues.

A frequency of 3 MHz is known for its capability to target tissues that are close to the surface, typically within the first 1-2 centimeters of the skin. This makes it ideal for treating conditions in areas like the tendons, ligaments, and superficial muscles, where localized heating and increased circulation are desired. The use of this higher frequency can lead to effective therapeutic outcomes in superficial layers by elevating tissue temperature without impacting deeper structures significantly.

In contrast, lower frequencies like 1 MHz are more effective for deeper tissue penetration, making them better suited for conditions that require treatment beyond the superficial layers. Frequencies such as 2 MHz and others fall somewhere in between. Thus, the choice of frequency is crucial based on the therapeutic goals and the anatomy of the target tissue.