Method for examining an object using an X-ray recording system for phase contrast imaging with stochastic phase scanning

摘要

A method, for examining an object using an X-ray recording system, includes during an X-ray image recording, moving components relative to one another with the lateral displacement by displacement distances. The method includes generating the X-ray image recording during the displacement from n partial images, so that the total exposure time of the X-ray image recording is made up from a sum of partial exposure times. In each of the partial images, the intensity is determined in each pixel. The position of the second component relative to the first component is determined for each recording of the partial images. Finally, the image information is determined from the partial images and the displacements.

主权项

1. A method for examining an object with an X-ray recording system for phase contrast imaging including at least one X-ray emitter for generating a quasi-coherent X-ray beam as a first component, an X-ray image detector including pixel elements arranged in a matrix, a diffraction or phase grating arranged between the object and the X-ray image detector, and an analyzer grating associated with the phase grating for generating an intensity pattern or interference pattern, at least two of the X-ray image detector, phase grating and analyzer grating being fixedly connected to one another and form a second component, the method comprising:
moving the first and second components, during an X-ray image recording of the object, relative to one another with a lateral displacement by displacement distances; generating the X-ray image recording during the displacement from n partial images, such that a total exposure time of the X-ray image recording is made up of a sum of partial exposure times; determining, in each of the partial images, an intensity in each pixel; determining a position of the second component relative to the first component for each recording of the partial images; and determining image information from the partial images and the displacements.