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Fig. 30 An axial cross-section of a 3D MR image of a normal spine, obtained by a orthogonal
MPR, b oblique MPR and c orthogonal CPR
Fig. 31 An axial cross-section of a 3D CT image of a scoliotic spine, obtained by a orthogonal
MPR, b oblique MPR and c orthogonal CPR
vertebral anatomical structures at corresponding anatomical locations. Although
visualization at corresponding anatomical locations can be achieved by axial
oblique multi-planar cross-sections (Figs.
30
b and
31
b), it is difficult to determine
the correct angles of rotation so that the resulting cross-sections are orthogonal to
the spine curve.
The above mentioned problems with visualization are solved by applying CPR.
Sagittal and coronal orthogonal and oblique curved-planar cross-sections simulta-
neously display the anatomy of all vertebrae along the whole length of the spine,
both in the case of the normal spine (Figs.
26
c
f and
28
c
e) and scoliotic spine
-
-
(Figs.
27
c
e). In the case the spine curve is displayed as a straight line in
curved-planar cross-sections of both the normal spine (Figs.
26
c, e and
28
c, e) and
scoliotic spine (Figs.
27
c, e and
29
c, e), then anatomical deformations are present in
the resulting cross-sections due to the intersections of successive sagittal and
f and
29
c
-
-
