Olympus EVIS EXERA II - Page 250

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Appendix E: Acoustic Output Information Accordance with IEC 60601-2-37
ULTRASOUND GASTROVIDEOSCOPE GF-UCT180
 Acoustic measurement uncertainty
Peak-rarefactional acoustic pressure
Attenuated peak-rarefactional acoustic pressure
Pulse repetition rate
Thermal index
Bone thermal index
Cranial-bone thermal index
Soft-tissue thermal index
Soft tissue thermal index in an auto-scanning mode
Soft tissue thermal index in a non-autoscanning mode
Pulse duration
–12 dB output beam dimensions
Distance from the source to a specified point
Depth for TIB
Break-point depth
Depth for TIS
Center frequency (MHz). For MI, f
c
is the center frequency
associated with the transmit pattern giving rise to the global
maximum reported value of MI. For TI, for combined modes
involving transmit patterns of unequal center frequency, f
c
is
defined as the overall ranges of center frequencies of the
respective transmit patterns
Pulse intensely integral
Quantity
Uncertainty
(95% confidence)
P 12.22%
PII 25.62%
P
r
13.19%
F
c
2.39%
r
p
r
p
, α
prr
TI
TIB
TIC
TIS
TIS
scan
TIS
non scan–
t
d
XY,
z
z
b
z
bp
z
s
f
c
PII