NOTE
Per Section 6.4 of the Output Display Standard, measurement precision on the following
quantities is determined by making repeated measurements and stating the standard deviation
as a percentage.
Acoustic Measurement Precision
Quantity Precision (Percentage Standard
Deviation)
Pr is the underated peak rarefactional pressure
measured in megapascals (MPa).
Pr: 5.4%
Wo is the ultrasonic power in milliwatts (mW). 6.2%
f
c
is the center frequency in megahertz (MHz)
(NEMA UD-2 definition).
<1%
PII.3 is the derated spatial-peak pulse intensity
integral in joules per square centimeter (J/cm
2
).
P11.3: 3.2%
Acoustic Measurement Uncertainty
Quantity Measurement Uncertainty
(Percentage, 95% Confidence Value)
Pr is the underated peak rarefactional pressure
measured in megapascals (MPa).
Pr: ±11.3%
Wo is the ultrasonic power in milliwatts (mW). ±10%
f
c
is the center frequency in megahertz (MHz)
(NEMA UD-2 definition).
±4.7%
PII.3 is the derated spatial-peak pulse intensity
integral in joules per square centimeter (J/cm
2
).
PII.3: +18% to -23%
Safety
Biological Safety
64 EPIQ 7 User Manual 4535 617 25341
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