percentage.
Measurement Uncertainty
Parameter
Description
Uncertainty
Pulse Intensity Integral (PII)
Energy density (mJoules/cm
2
) in an ultrasonic pressure wave.
+20.4%
Used in TI, Ispta.0, and Ispta.3 determination.
Peak Rarefactional Pressure (Pr)
Largest pressure amplitude (MPa) of the negative pressure.
Used in MI determination.
Acoustic Power (W)
Time-average acoustic power in an ultrasonic beam.
Influenced by pressure wave amplitude and length, as well
as pulse repetition frequency.
Used in TI determination.
+/-10%
Center Frequency (Fc) Center frequency (MHz) of an ultrasonic pressure wave.
Used in TI and MI determination.
+/- 2%
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