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(a) Numerical phantom with a single object located at the center of the domain, and a 10:1 contrast in phosphor between the object and background. The X-ray source irradiates the domain along the long-axis of the phantom at a position of X=10, Y=−60:60. (b) The emission fluence field of (a). (c) Numerical phantom with the X-ray source irradiating at a position of X=40, Y=−60:60. (d) The emission fluence field of (c).
