FujiFilm SonoSite X-Porte User Manual page 333

TIS (Soft tissue thermal index) is a thermal index related to soft tissues. TIS scan is the soft
tissue thermal index in an auto-scanning mode. TIS non-scan is the soft tissue thermal
index in the non-autoscanning mode.
W (z ) Derated ultrasonic power at axial distance z
3 1
Wo Ultrasonic power, except for TIS
through a one centimeter window in units of milliwatts.
z
Axial distance corresponding to the location of maximum min(W
1
where z ≥ zbp in centimeters.
z 1.69 (A
bp
z For MI, the axial distance at which p
sp
TIB is a global maximum (for example, z
Acoustic output
) in centimeters.
apr t
in units of milliwatts.
1
, in which case it is the ultrasonic power passing
scan
is measured. For TIB, the axial distance at which
r.3
= z ) in centimeters.
sp b.3
2
(z ), I (z) x 1 cm )],
3 1 TA.3
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