GE Vscan Air, Manual

Page: 386 / 407

Appendix
8-4
Vscan Air
–
User Manual
Direction GP092020-1EN Rev 18
Thermal index display selection
The system provides the ability to select the display of any of the
TI categories regardless of the current application while
scanning. To switch in between the different thermal indices
touch the MI/TI display in the lower left corner of the screen (see
‘Black/white imaging mode (B-mode)’ on
page 3-15 ). Touching
the indices display will circle through displaying the thermal
index categories in the following order TIS – TIC – TIB, starting
out from the factory selected TI category for the selected preset.
Figure 8-1. Thermal Index display
NOTE: Be aware that Figure 8-1 is illustrating the TI value display
utilizing the Curved - Abdominal - Factory default setting.
Displayed values can vary dependent on software version/
revision.
Mechanical Index
MI is the estimated likelihood of tissue damage due to cavitation.
MI is defined as:
equivalent to Track3 MI when the depth ZMI=Zsp.
The MI will not exceed a value of 1.9 according to Track 3 in the
FDA 510(k) guidance of September 9, 2008.
The depth for p
r,
(z) is not limited by the breakpoint depth.
The MI according to IEC62359 Ed2 will not exceed 1.9.
a. TIS
b. TIC
c. TIB