When treating larger areas in ultrasound therapy using a 5 cm2 sound head for the upper back extending to the lateral border of the scapula, how is treatment time allocated?

• A. Each side is allotted 5 minutes for each section
• B. Each side is allotted 2 minutes for each section
• C. Time per section is 10 minutes
• D. Time per section is 1 minute

Answer: (A)

Treating with a 5 cm2 ultrasound head over a large area is done by dividing the area into sections about the size of the head and giving each section the same amount of time to deliver consistent energy. For the upper back extending to the lateral border of the scapula, you would allocate five minutes to each section on each side. This keeps energy delivery uniform across the region and mirrors how larger areas are managed in ultrasound therapy. Shorter times per section would underdeliver energy, while much longer times per section could overexpose tissue. So, treating each side in 5-minute sections ensures even coverage and appropriate dosing.