User Manual

Acoustic Output Reporting Tables
Vscan Extend – User Manual 7-3
5721203-100 Rev. D
Acoustic Output Reporting Tables
Definitions, symbols and abbreviations
The following definitions, symbols and abbreviations are used in
the acoustic output reporting tables in this chapter:
Table 7-1: Definitions, symbols and abbreviations
IEC FDA Meaning—IEC 60601-2-37 / FDA & NEMA UD2, UD3
Acoustic Attenuation Coefficient / Derating factor (usually 0.3 dB/cm-MHz)
-12db Output Beam Area / Active aperture area
Normalizing Coefficient
Equivalent Aperture Diameter / (same)
Pulse Beam Width / Beam diameter at –6 dB
Equivalent Beam Diameter
Acoustic Working Frequency / Center frequency
Pulse-Average Intensity
Attenuated Pulse-Average Intensity
Pulse-Intensity Integral
Attenuated Pulse-Intensity Integral
Temporal-Average Intensity
Attenuated Temporal-Average Intensity / (at depth z)
Spatial-Peak Temporal-Average Intensity
Attenuated Spatial-Peak Temporal-Average Intensity
Mechanical Index
Output Power / Time average acoustic power at the source
Attenuated Output Power / Time average acoustic power derated to depth z