Automatic Segmentation of Anatomical Structures from CT Scans of Thorax for RTP

Figure 9

Segmentation of the spinal canal: (a) original CT slice in which the vertebra encloses the spinal canal completely, (b) original CT slice in which the vertebra does not enclose the spinal canal completely, (c, d) segmented spinal canals of (a, b) in white, and (e, f) spinal canal contours in red superimposed on the original slices.

(a)

(b)

(c)

(d)

(e)

(f)