title: Simple and fast method for the presentation of the two-dimensional modulation transfer function of x-ray systems.
abstract: A method for the evaluation of the two-dimensional MTF of x-ray systems is described. In a first step a statistical distribution of lead grains is imaged by the x-ray systems. In the second step this image is Fourier transformed in a coherent optical processor giving the two-dimensional display of the MTF. A demonstration of the method is given by showing the dependence of the MTF on shape and size of the focal spot of the x-ray tube and the nonshift invariance of a system using a rotating anode tube. Furthermore the application of the method in tomographic x-ray systems is tested.
authors.forename: G
authors.initials: G
authors.lastname: Groh
authors.forename: E
authors.initials: E
authors.lastname: Klotz
authors.forename: H
authors.initials: H
authors.lastname: Weiss