FujiFilm VisualSonics Vevo MD User Manual page 420

Terminology in acoustic output tables
A
aprt
d (z)
eq
d @PII
eq max
Dim. of A
aprt
fc
FL
I @MImax
pa.3
I
SPTA.3
I (z 1 )
SPTA.3
MI
PD
420 Glossary
Area of the active aperture measured in cm
Equivalent beam diameter as a function of axial distance
z, and is equal to
(z) is the temporal-average intensity as a function of z in
centimeters.
Equivalent beam diameter at the point where the free-field,
spatial-peak pulse intensity integral is a maximum in
centimeters.
Active aperture dimensions for the azimuthal (x) and
elevational (y) planes in centimeters.
Center frequency in MHz.
Focal length, or azimuthal (x) and elevational (y) lengths, if
different measured in centimeters.
Derated pulse average intensity at the maximum MI in
2
units of W/cm .
Derated spatial peak, temporal average intensity in units
2
of milliwatts/cm .
Derated spatial-peak temporal-average intensity at axial
distance z (milliwatts per square centimeter).
1
Mechanical index.
Pulse duration (microseconds) associated with the
transmit pattern giving rise to the reported value of MI.
2
.
, where I
TA