EDAN F9 Express - Page 199

F9, F9 Express Fetal & Maternal Monitor User Manual Ultrasound Intensity and Safety
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parameter specified in TRACK1 of FDA Guidance
TRACK1 parameter
NOTE
p
r.3
Derated Peak-rare-factional Acoustic Pressure
W
0
Output Power
z
sp
z
sp
=z
B.3
, Depth for Bone Thermal Index
f
c
Center Frequency, Acoustic
x
-6
-6dB Beamwidth
y
-6
PD
Pulse Duration
PRF
Pulse Repetition Frequency
MI
Mechanical Index
I
SPTA.3
Derated Spatial-peak Temporal-average Intensity
I
SPPA.3
Derated Spatial-peak Pulse-average Intensity
Az.
Aperture X width
Y Dimeter
Ele.
EDS
Entrance Dimensions Of The Scan
EBD
Entrance Beam Dimensions