A patient is being treated with ultrasound for muscle guarding in the upper trapezius. The athletic trainer wishes to achieve a mild heating effect by increasing the temperature by 30° C. If 1 MHz...

A patient is being treated with ultrasound for muscle guarding in the upper trapezius. The athletic trainer wishes to achieve a mild heating effect by increasing the temperature by 30° C. If 1 MHz ultrasound at an intensity of 1.5 W/cm2 is being used, how long must the treatment be to achieve this temperature increase?