Figure 16.2
MRI scan of a patient with a surgical excision in the right HG; illustrated are planes of section oriented horizontally (
A), sagittally (
B), and coronally
(C
). The left side of panels
A
,B
, and
C
show the patient’s scan alone, with an
arrow
indicating the region of excision/undercutting. The images on the
right side
of
panels
A,
B, and
C
show the patient’s scan coregistered with an anatomical probabilistic map of
HG derived from normal individuals (Ref. 44). The
crosshairs
indi-
cate the same position in the standardized space as the
arrow
. Note the correspondence between the position of HG as determined from the map and the patient’s
partially excised HG region. The
yellow box
in panel
C
indicates the region of the removal pictured in close-up in panel
D
, which illustrates the transition from intact,
to undercut, to fully excised tissue (coronal sections taken at 3-mm int
ervals, posterior to anterior).
Arrows
again correspond to the
crosshairs
in the other panels and
indicate the location of the HG region. (See Plate 4A–D in colour section.)
D