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Fig. 15 A coronal orthogonal multi-planar cross-section M
y¼y
c
of a 3D CT image of a scoliotic
spine, shown in a 3D view, b left sagittal view, c posterior coronal view and d superior axial view
of the image-based coordinate system (Note The image-based coordinate system and the spine
curve correspond to Figs.
1
and
7
)
Coronal Orthogonal Multi-planar Cross-Sections
Coronal orthogonal multi-planar cross-sections are obtained by sampling the 3D
image on selected coronal planes that are orthogonal to axis y of the image-based
coordinate system. The coronal orthogonal multi-planar cross-section M
y¼y
c
is
therefore obtained by selecting a
y
c
, and sampling the 3D
image I along coordinates x and z in the image-based coordinate system:
fixed coordinate y
¼
M
y¼y
c
ð
x
;
z
Þ
¼
I
ð
x
;
y
c
;
z
Þ:
ð
50
Þ
