Acoustic Output
Vscan Air
–
User Manual
8-7
Direction GP092020-1EN
Rev 18
Acoustic Parameters as Measured in Water
Definitions, symbols and abbreviations
The following definitions, symbols and abbreviations are used in
the acoustic output reporting tables in this chapter:
IEC
Meaning—IEC/EN62359 Ed.2
MI
Mechanical Index
TIS
Soft Tissue Thermal Index
TISas
Soft Tissue Index at-surface, scanning or non-scanning
TISbs
Soft Tissue Index below-surface, scanning or non-scanning
TIB
Bone Thermal Index
TIBas
Bone Thermal Index at surface, scanning or non-scanning
TIBbs
Bone Thermal Index below-surface, scanning or non-scanning
TIC
Cranial-bone Thermal Index
p
r,
Attenuated peak-rare-factional acoustic pressure
C
MI
Normalizing Coefficient 1MPa*MHz-1/2
P
Output power
P
1x1
Bounded square output power
z
s
Depth for TIS below surface
z
b
Depth for TIB below surface
z
MI
Depth for MI
Z
pii,
Depth
for
I
pa,
, and I
spta,
,
fawf
Acoustic working frequency
prr
Pulse repetition rate
srr
Scan repetition rate
n
pps
Number of pulses per scan line
I
pa,
,
Attenuated pulse average intensity
I
spta,
,
Attenuated speatial-peak temporal-average intensity
I
spta
Spatial-peak temporal-average intensity
pr
Peak-rare-factional acoustic pressure
α
α
α
α
α
α
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