FIG. 10.

Lung segmentation accuracy comparison: contour updating every 1 reconstruction iteration vs every 5 reconstruction iterations. (a) with updating by every 1 reconstruction iteration, the contour obtained after 5 reconstruction iterations; (b) with updating by every 5 reconstruction iterations, the contour obtained after 5 reconstruction iterations; (c) contour difference between (a) and (b); (d) with updating by every 1 reconstruction iteration, the contour obtained after 10 reconstruction iterations; (e) with updating by every 5 reconstruction iteration, the contour obtained after 10 reconstruction iterations; (f) contour difference between (d) and (e).