FDA Acoustic Output Data
LOGIQ 500 Advanced Reference Manual
2276614–100 Rev. 0
6–107
Measurement Precision and Uncertainty
Precision and measurement uncertainty of the system used to
measure the acoustic output is provided in the following table.
These values are determined in accordance with Section 6.4 of
the
Standard for Real-Time Display of Thermal and Mechanical
Acoustic Output Indices on Diagnostic Ultrasound Equipment,
AIUM/NEMA 1992 and the
Acoustic Output Measurement
Standard for Diagnostic Ultrasound Equipment, NEMA 1992.
Center
Frequency
Acoustic
Power
Peak
Rarefactional
Pressure
Acoustic
Intensity
Precision
4.4%
1.5%
2.6%
5.1%
Measurement
Uncertainty
10.0%
3.4%
6.0%
11.6%
Table 6–143. Measurement Precision and Uncertainty
Acoustic Output Display Operation and Accuracy
The Acoustic Output display shows MI (Mechanical Index) while
in B-Mode. When other modes are selected TIS, TIB or TIC are
displayed. The Setup/Custom Display menu page 9 will
determine which value (TIS, TIB or TIC) is displayed.
Display increments are 0.2 for values of one or less and 1.0 for
values greater than one. Display accuracy for MI is –15% to
+38%. Display accuracy for TI is –37% to +95%. Index values
less than 0.4 are not displayed.
Summary of Contents for Logiq 500
Page 1: ......
