Figure 1. Magnetic resonance images
and 3D reconstruction (lower right) used for image-guided
surgery show the brain tumor and zones for 1 mm (green sphere/circle)
and 2 mm (yellow circle) accuracy. Blue circles surround
external skin markers used to register the image space with
the actual head of the patient, so that the images can be
used to guide the surgeon through the antomy of the brain
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Figure 2. Yellow areas in these
MRI brain images depict the region of the brain responsible
for hand movement. A tumor near this motor area of the brain
is also shown along with the trajectory of a surgical instrument
(green line) used during surgery. In addition, ultrasound
images (lower right) acquired during surgery were used to
update the position of the tumor and surrounding anatomy.
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