What is the most appropriate size soundhead to use when the target area is measured at 12 cm2?

When selecting the appropriate size soundhead for therapeutic ultrasound, a key consideration is to match the size of the soundhead to the treatment area for optimal effectiveness. The goal is to ensure that the soundhead covers the target area without being too large or too small, as both can affect treatment outcomes.

In this case, the target area is measured at 12 cm². The chosen soundhead size should ideally be about one-half to one-third the size of the treatment area to maintain effective energy density and ensure uniform ultrasound delivery.

Choosing a soundhead size of 5 cm² is most appropriate because it is well-suited for adequately covering a 12 cm² area. It allows for effective application of ultrasound energy while avoiding potential issues that may arise from using a soundhead that is too small, which might result in uneven energy distribution, or one that is too large, which could lead to ineffective treatment.

Soundheads smaller than 5 cm², such as 1 cm² or 3 cm², would not effectively cover the target area, possibly leading to inadequate treatment. A soundhead size of 8 cm² would be closer but is still slightly smaller than the ideal proportion. Hence, the selection of a 5 cm² soundhead