To keep therapy within comfortable limits, intensity should be kept around which range?

To keep therapy within comfortable limits, intensity should be kept around which range?

• A. 0.5-1.0 W/cm2
• B. 1-1.25 W/cm2
• C. 2-3 W/cm2
• D. 3-4 W/cm2

Answer: (B)

The main idea is choosing an ultrasound intensity that provides a therapeutic heating effect without causing discomfort. 1-1.25 W/cm2 is a mid-range value that typically yields mild-to-moderate tissue heating at common treatment depths while keeping patient comfort and safety in check. Lower ranges like 0.5-1.0 W/cm2 may be too mild for effective heating in many cases, especially at deeper targets, whereas higher ranges such as 2-3 or 3-4 W/cm2 increase the risk of overheating and discomfort, particularly if duration is long or coupling isn’t ideal. In practice, clinicians start around the 1-1.25 W/cm2 range and adjust based on tissue depth, frequency, and patient feedback.

The main idea is choosing an ultrasound intensity that provides a therapeutic heating effect without causing discomfort. 1-1.25 W/cm2 is a mid-range value that typically yields mild-to-moderate tissue heating at common treatment depths while keeping patient comfort and safety in check. Lower ranges like 0.5-1.0 W/cm2 may be too mild for effective heating in many cases, especially at deeper targets, whereas higher ranges such as 2-3 or 3-4 W/cm2 increase the risk of overheating and discomfort, particularly if duration is long or coupling isn’t ideal. In practice, clinicians start around the 1-1.25 W/cm2 range and adjust based on tissue depth, frequency, and patient feedback.