Sonication Stages
65°C
60°C
60°C
55°C
55°C
50°C
50°C
45 °C
Verify
42°C
40 °C
Align
First three (or more as
needed) sonications
35 °C
One or two
sonications to
make sure we
see tremor relief
and no side
effects
Physiological
Physiologic
Verification
Verification
Anatomical
Localization
Fully reversible
Making sure spot is
aligned in all three
planes and not
spreading
Transition zone
Checking for
tremor relief, side
effects to ensure
target location is
effective
Treat Low
Treat High
See next slide
for lesioning
info.
Treatment
Ablative
Treatment
Lesion
Creating a
permanent lesion
 At 43°c – 240 minutes
To create a lesion
 At 54°c – 3 seconds
 At 57°c – 1 second