Chattanooga Intelect Mobile Ultrasound - Description of Ultrasonic Field

9
Intelect
®
Mobile Ultrasound
OVERVIEW OF ULTRASOUND THERAPY - COMMON TERMS (CONTINUED)
Ultrasound Intensity – Ultrasound power delivered to the patient expressed in total power as watts (W) or in terms of the sound
head’s effective radiating area, watts per centimeter squared (W/cm
2
).
Description of Ultrasonic Field
The spatial distribution of the radiated field is essentially a collimated beam of the ultrasonic energy having a cross-sectional area of
8.5 cm
2
for the 10 cm
2
sound head when measured at a point 5 mm from the transducer face.
The energy distribution within the radiated field is 3.0 W/cm
2
maximum and it takes a generally conic shape, having decreasing
intensity at progressively increasing distance from the face of the transducer. This field distribution applies for the radiation emitted
into the equivalent of an infinite medium of distilled, degassed water at 30 °C and with the line voltage variations in the range of 10%
of the rated line voltage.
ABOUT ULTRASOUND THERAPY