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MTFs obtained from wire and bead phantoms. Wire phantom image (a) reconstructed with the kernel FC52. Two ROIs (30 and 50 pixels) were placed on the image. Twenty‐one MTF results (b) were obtained by changing the ROI size from 30 to 50 pixels on the wire image reconstructed with the kernel FC10. Twenty‐one MTF results (c) for the kernel FC50. Twenty‐one MTF results (d) for the kernel FC52. Results (e)–(h) for the bead method are as for (a)–(d).
