I
(z)
Time average sound intensity
ta
I
(z)
Decay time average sound intensity
ta, α
Spatial peak time average sound
I
(z)
zpta
intensity
Decay time space peak time average
I
(z)
zpta, α
sound intensity
MI
Mechanical index
P
output power
P
Output power after attenuation
α
P
Bounded output power
1
p
Pulse sound pressure square integral
i
p
Peak sparse sound pressure
r
p
Peak sparse sound pressure
r.a
Prr
Pulse repetition frequency
TI
Thermal index
TIS
Soft tissue thermal index
TIB
Bone thermal index
TIC
Skull thermal index
Distance from the sound source to the
Z
specified point
Distance from the sound source to the
z
b
specified point
z
Breakpoint depth
bp
z
Depth for TIS
s
68