A technique is described which allows for the direct determination of the modulation transfer function (MTF) simultaneously in all orientations. This approach utilizes the point spread function and is similar to the better known line spread function approach. The advantages of the point spread function approach lie in the reduction in the amount of data collected while providing for the determination of significantly more information about the quality of the radiographic imaging system. The two dimensional MTF allows for the quantitation of information concerning directional dependence of image quality, experimentally verified utilizing anatomical phantoms. In addition, the results are correlated with images of the standard star phantoms.
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