For a standard ultrasound session, treatment time per area is typically:

• A. 5–10 minutes
• B. 15–20 minutes
• C. 25–35 minutes
• D. 60–90 minutes

Answer: (A)

Therapeutic ultrasound delivers energy to a specific tissue area for a limited duration to achieve the desired heating or non-thermal effects without risking tissue damage. In standard practice, about five to ten minutes are allocated per treatment area. This window provides enough energy to produce a therapeutic effect while keeping safe limits for tissue heating given typical transducer sizes and intensities. If the target area is larger, clinicians cover it by treating adjacent areas within that same time frame or move the head to distribute energy efficiently; deeper tissues may use a lower frequency (1 MHz) but the per-area time remains within this 5–10 minute range. Shorter times may not achieve the needed heating, while much longer times offer little extra benefit and can increase discomfort or risk.