GE Medical Systems LOGIQ 7 Reference Manual page 11

List of Acoustic Output Parameters
FDA IEC
α
a
A A
aprt arpt
C
MI
D D
eq eq
d d
-6 -6
d d
eq eq
f ƒ
c awf
I I
pa pa
I I
pa.3 pa,α
PII I
pi
PII I
.3 pi,α
I I (z)
TA ta
I (Z) I (z)
TA.3 ta,α
I (Z) I (z)
SPTA zpta
I (Z) I (z)
SPTA.3 zpta,α
MI MI
W P
o
W (Z) P
α
.3
W P
o1 1
PII p
i
p p
r r
p p
r.3 rα
PRF prr
TI TI
TIB TIB
TIC TIC
TIS TIS
PD t
d
x ,y X, Y
-12 -12
Z Z
Z Z
sp b
Z Z
bp bp
Z Z
sp s
LOGIQ 7/LOGIQ 7 Pro Advanced Reference Manual
Direction 5116269-100 Rev. 2
Table 1-3: List of Acoustic Output Parameters
Meaning—IEC 60601-2-37 / FDA & NEMA UD2, UD3
Acoustic Attenuation Coefficient / Derating factor (usually 0.3 dB/cm-MHz)
-12db Output Beam Area / Active aperture area
Normalizing Coefficient
Equivalent Aperture Diameter / (same)
Pulse Beam Width / Beam diameter at –6 dB
Equivalent Beam Diameter
Acoustic Working Frequency / Center frequency
Pulse-Average Intensity
Attenuated Pulse-Average Intensity
Pulse-Intensity Integral
Attenuated Pulse-Intensity Integral
Temporal-Average Intensity
Attenuated Temporal-Average Intensity / (at depth z)
Spatial-Peak Temporal-Average Intensity
Attenuated Spatial-Peak Temporal-Average Intensity
Mechanical Index
Output Power / Time average acoustic power at the source
Attenuated Output Power / Time average acoustic power derated to depth z
Bounded Output Power / Power emitted from the central 1cm of aperture
Pulse Pressure Squared Integral / Pulse intensity integral
Peak-Rarefactional Acoustic Pressure / (same)
Attenuated Peak-Rarefactional Acoustic Pressure / (same)
Pulse Repetition Rate / Pulse repetition frequency
Thermal Index / (same)
Bone Thermal Index / (same)
Cranial-Bone Thermal Index / (same)
Soft-Tissue Thermal Index / (same)
Pulse Duration / (same)
-12 dB Output Beam Dimensions / (same)
Distance from the Source to a Specified Point / (same)
Depth for TIB / Depth at which the relevant index is maximum
Break-Point Depth / (same)
Depth for TIS / Depth at whcih the relevant index is maximum
Acoustic Output Data
1 5
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