What frequency is recommended for deeper penetration during ultrasound treatments?

In ultrasound treatments, the frequency of the sound waves plays a critical role in determining the depth of penetration and the associated therapeutic effects. A frequency of 1 MHz is typically used for deeper penetration, as sound waves at this frequency can travel further into the tissue, reaching deeper layers such as muscles and connective tissues. It is particularly effective for therapeutic applications that require deeper tissue heating and penetration.

In contrast, frequencies higher than 1 MHz, such as 2 MHz or 3 MHz, are more suitable for targeting more superficial tissues like the dermis and epidermis. As the frequency increases, the penetration depth decreases due to the higher energy absorption by the superficial layers, which may not be optimal for deeper treatments.

Therefore, while 2 MHz and 3 MHz are indeed used in ultrasound treatments, they primarily facilitate effects on more superficial layers rather than those deeper in the body. A frequency of 1 MHz is the appropriate choice when the objective is deeper penetration during ultrasound treatments.