Safety Biological Safety
50 Lumify Ultrasound System
Philips Healthcare 4535 618 58571_A/795 * MAY 2016
temperature elevations for fetal bone and tissue were computed based on calculation
procedures 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
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
).
PII.3: 3.2%
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