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. Author manuscript; available in PMC: 2007 Nov 13.

Published in final edited form as: Acad Radiol. 2006 Nov;13(11):1422–1430. doi: 10.1016/j.acra.2006.07.015

Fig. 1 — Comparison of the variances predicted using direct computation of the expansion coefficients (solid line) to empirical estimates of the variance computed using independent sampling (circles). In (a), N_r is varied from 1 to 50 with both N₀ and N₁ fixed at 100. In (b), N_r was fixed at 5 while both N₀ and N₁ were varied from 10 to 1000. For the independent sampling, 10,000 repetitions were used.

Fig. 1 — Comparison of the variances predicted using direct computation of the expansion coefficients (solid line) to empirical estimates of the variance computed using independent sampling (circles). In (a), N_r is varied from 1 to 50 with both N₀ and N₁ fixed at 100. In (b), N_r was fixed at 5 while both N₀ and N₁ were varied from 10 to 1000. For the independent sampling, 10,000 repetitions were used.