Figure 14.

Representative slice of a completeness map for a triple-source helical scan mode with rotation angle $t\in [-2\pi ,2\pi ]$, planar detector W × H = 323.2 × 40 mm, and pitch length h = 92.7 mm. While the left image is in a display window [0, 1], the right image indicates the exact reconstruction region. The square boxes indicate the VOI, which is covered by the exact reconstruction region.