given in Sections 4.3.2.1 through 4.3.2.6 in "Bioeffects and Safety of
Diagnostic Ultrasound" (AIUM Report, January 28, 1993).
Acoustic Output Tables
Acoustic output tables are in Acoustic Output Tables, on your user information
CD.
Acoustic Measurement Precision and Uncertainty
All table entries have been obtained at the same operating conditions that give
rise to the maximum index value in the first column of the tables. Measurement
precision and uncertainty for power, pressure, intensity, and center frequency
are listed in the following tables.
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
Precision (Percentage
Standard Deviation)Quantity
Pr: 5.4%Pr is the underated peak rarefactional
pressure measured in MPa.
6.2%Wo is the ultrasonic power in mW.
<1%f
c
is the center frequency in MHz (NEMA
UD-2 definition).
P11.3: 3.2%PII.3 is the derated spatial-peak pulse
intensity integral in J/cm
2
.
63
iU22 User Manual
4535 614 45861
2
Safety
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