RIU 320 Lecture Notes - Lecture 25: Sound, Medical Ultrasound, Ultrasonic Transducer

• School: GVSU
• Department: Radiation and Imaging - Ultrasound
• Course: RIU 320
• Professor: Angela Malone

Document Summary

Intensity: the concentration of energy in a sound beam. To calculate intensity, divide the beam"s power by the beam"s cross sectional area. Intensity, like power and amplitude, describes the bigness of a wave. Intensity relates to how the power in a wave spreads or is distributed in space. Therefore, intensity depends on both the power in the beam and the area over which the power is applied: units: watts/square centimeter, or w/cm^2, typical values: in clinical imaging, intensity ranges from 0. 01 to. 300 w/cm^2: intensity (w/cm^2)= power(w)/ area(cm^2, determined by: just like amplitude and power, initial intensity is determined by only the sound source, the ultrasound system. Intensity changes as sound propagates through the body. The rate at which intensity changes as sound propagates depends on the characteristics of both the sound wave and the medium: adjustable: yes. Initial intensity, like power and amplitude, can be changed.