Terason t3000, Руководство пользователя

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Chapter 12 - System Safety and Maintenance Acoustic Output Tables
Terason t3000 / Echo Ultrasound System User Guide 280
Acoustic Output Tables
Terason tests all transducers it sells for use on humans, to determine their maximum
acoustic outputs in the scanning modes supported by the transducers. When the results of
those tests require reporting, a table is generated and included in Appendix F,
Acoustic
Output Reporting for Track 3 . The following table lists which combinations of transducer
and mode can produce acoustic outputs that exceed the reporting thresholds. There are
also tables for some combinations that do not produce outputs exceeding the thresholds.
3.5
4.0 14% to –11% 14% to –11% 14% to –11% 14% to –11% 14% to –11%
a. Display Accuracy is not defined for actual index values (x
Actual
) of zero.
b. x
Display
– x
Actual
is always greater than zero.
c. Mechanical Index (MI) values greater than 1.9 exceed FDA Guideline levels.
Track 3 Transducer/Mode Combination Summary
Mode
Transducer
Model
2D M PWD CWD
Color
Doppler
a
a. Includes Directional Power Doppler (DPD), Non-Directional Power Doppler (PD), and
Color Doppler (CD).
Combined
b
b. 2D+PWD: refer to acoustic output tables for PWD in Appendix F, Acoustic Output
Reporting for Track 3 .
Other
4V2A X X X X X X
4V2S X X X X X X
5C2A X X X
7L3V X X X
8BP4 X X X X
8EC4A X X X X X
8MC3 X X X X X
8TV4
(t3000 only) X X X X X
10V5S
(t3000 only) X X X X X
12HL7 X X X X X
12L5V X X X X X
PDOF X
Estimated Display Accuracy Values (Continued)
Display
Value
MI
TIS
scan
TIS
unsc-A<1
TIS
unscA>1
TIB
unsc
TIC