10-4 Acoustic Output
Operations Affections on Acoustic Output
Changing frequency
Changing the operating frequency changes the focal characteristics of
the acoustic waves, thus changes the acoustic output power.
Line density
Changing the number of acoustic lines generated (line density) affects
the acoustic output power.
Preset
Since the system and user presets contain all of the above imaging
parameters, changing the preset will change the acoustic output power.
Reset or Power Off/On
Resetting or powering the system on or off causes the system to return
to the default status thus may change the acoustic output power.
10.9 References for Acoustic Power and Safety
1. “Bioeffects and Safety of Diagnostic Ultrasound” issued by AIUM in 1993
2. “Medical Ultrasound Safety” issued by AIUM in 1994
3. “Information for Manufacturers Seeking Marketing Clearance of Diagnostic Ultrasound
Systems and Transducers” issued by FDA in 2008.
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