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AssigneeGE Homeland Protection, Inc.
InventorGeoffrey Harding
Estimating the term…
The invention relates to an x-ray computer tomograph, having an x-ray source 1 that generates a fan beam of x radiation and having a two-dimensional energy-resolving detector array 5, both of which are situated on opposite sides of a gantry so that the x radiation passes completely through a test region; a row of detector elements 6 is situated in the plane of the fan beam 2 and is adjoined in at least one direction perpendicular to the fan beam 2 in at least one direction perpendicular to the fan beam 2 by several additional rows of detector etements 7; during the measurement, no secondary collimator is positioned between the test region and the detector array 5 and the following equation applies for the width (B) of the detector elements: B=Zp*arcsin (qmax*λ), where qmax is the pulse transmission, λ is the wavelength of the x radiation. and Zp is the distance of the measurement point from the detector.
An x-ray computer tomographs having an x-ray source (1) that generates a fan beam (2) of x radiation and having a two-dimensional energy-resolving detector array (5), both of which are situated on opposite sides of a gantry so that the x radiation passes completely through a test region;
A method for examining a test piece (4), in particular a piece of tuggage, by means of an x-ray computer tomograph as recited in one of the preceding claims, in which a locally resolved measurement of coherent x radiation scattered forward by the test piece (4) is performed without a secondary collimator being positioned between the test piece (4) and the detector array (5), wherein the main component of the scattered signal is obtained based on data from detector elements that lie in an angular range of
Dependencies are inferred from the claim text.