16
Acoustic
MI
I
SPTA.3
I
SPPA.3
Output
(mW/cm
2
)
(W/cm
2
)
Global
Maximum
Value
p
r.3
(MPa)
W
0
(mW)
Associated
f
c
(MHz)
Acoustic
Z
sp
(cm)
Parameter
Beam dimensions
x
-6
(cm)
y
-6
(cm)
EBD
Az. (cm)
Ele. (cm)
I
SPTA.3
-
The derated spatial-peak, temporal-average intensity
(milliwatts per square centimeter).
I
SPPA.3
-
The derated spatial-peak, pulse-average intensity
(milliwatts per square centimeter).
MI
-
The Mechanical Index.
p
r.3
-
The peak rarefactional pressure
(megapascals) associated with the transmit pattern giving rise to the value reported under
MI.
W
0
-
The total time-average
ultrasonic power
(milliwatts).
f
c
-
The probe
center frequency
(MHz).
z
sp
-
The axial distance at which the reported parameter is measured (centimeters).
x
-6
& y
-6
-
The -6dB beam dimensions in the x-y plane where z
sp
is found (centimeters).
EBD
-
the
entrance beam dimensions
(centimeters). These dimensions are the same as the dimensions of the transmit crystal.
Operating Conditions:
There are no user controls which affect the ultrasound output.
Measurement Uncertainties:
Power:
+29%, -42%
Pressure:
+17%, -23%
Intensity:
+18%, -29%
Frequency:
+1%, -1%
Additional Information for IEC-1157
The output beam intensity I
ob
=48 mW/cm
2
This transducer is intended for direct patient contact.
The probe face has a liquid ingress level of IPX4.
When in the presence of audible interference the heart rate display may be inaccurate.
.033
348
.348
.074
5.2
5.2
7.8
7.8
7.8
0.52
0.52
0.52
0.32
0.32
0.17
0.17
0.20
0.46
Acoustic Output Reporting Table
Transducer Model:
Elite
™ 8MHz
Operating Mode:
Continuous Wave (cw)
Application(s):
Peripheral Vascular