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The reconstructed sphere resolution dependence on the off-center location of spheres (X value) for 2.5 mm diameter (bottom curves) and 4.0 mm diameter (top curves) spheres. The panel separation is 4 cm. (a) For the in-plane resolution, X = 0, 1.0 and 1.5 cm were studied. (b) For the orthogonal-plane resolution, only X = 0 and 1.0 cm were studied (b) (the tails of the 4.0 spheres sphere overlap the panel for X = 1.5 cm along the X direction).
