Patent Number: 
Section: claims

1. A radiation detector, comprising:an array of 2D collimators configured to collimate in at least two collimation directions, each of the 2D collimators of the array including 2D collimator modules arranged in series, adjacent ones of the 2D collimator modules being glued together via a layer of adhesive, to establish a fixed mechanical connection to facing module sides of the 2D collimator modules, relatively outer ones of the 2D collimator modules including at least one retaining element on at least one remaining side, the retaining element including a screw mechanism for mounting each of the 2D collimators of the array opposite a detector mechanism, whereineach of the 2D collimators of the array is replaceable independently of the remaining ones of the 2D collimators of the array. 2. The 2D collimator as claimed in claim 1, wherein the facing module sides are implemented such that an absorber surface of an absorber element of one of the 2D collimator modules, running parallel to the module side, is glued to edges of absorber elements of other adjacent ones of the 2D collimator modules. 3. The 2D collimator as claimed in claim 1, wherein the facing module sides are implemented such that absorber surfaces, running parallel to the module sides, of an absorber element of the adjacent 2D collimator modules are glued together. 4. The 2D collimator as claimed in claim 1, wherein, for mutual alignment of the adjacent 2D collimator modules, there is provided on one facing module side, at least one projection to engage in at least one recess in the corresponding other module side. 5. The 2D collimator as claimed in claim 1, wherein the at least one retaining element includes,at least one fastening device to fasten the respective 2D collimator to the detector mechanism; andat least one adjustment device to position the 2D collimator in the collimation direction with respect to the detector mechanism. 6. The 2D collimator as claimed in claim 5, wherein the at least one adjustment device for positioning the 2D collimator with respect to the detector mechanism in a radiation incidence direction includes a bearing surface which, when the 2D collimator is incorporated in the detector mechanism in the radiation incidence direction, comes to rest against a support surface of the detector mechanism. 7. The 2D collimator as claimed in claim 1, wherein at least the outer 2D collimator modules are manufactured in one piece with the at least one retaining element. 8. The 2D collimator as claimed in claim 7, wherein the 2D collimator modules are produced using selective laser sintering. 9. A method for manufacturing an array of 2D collimators collimating in at least two collimation directions with 2D collimator modules disposed in at least one collimation direction of each of the 2D collimators, the method comprising:preparing a plurality of 2D collimator modules;applying a layer of adhesive to at least one module side of adjacent ones of the 2D collimator modules;forming each of the 2D collimators of the array from a given number of the plurality of 2D modules, each of the 2D collimators of the array being replaceable independently of the remaining ones of the 2D collimators of the array;mounting each of the 2D collimators opposite a detector mechanism via at least one retaining element including a screw mechanism; andplacing the 2D collimators in a precision tool at a position provided for respective 2D collimator modules. 10. The method as claimed in claim 9, further comprising:gluing the at least one retaining element to at least one free side of relatively outer ones of the 2D collimator modules. 11. The method as claimed in claim 9, wherein the preparing includes producing the 2D collimator modules using selective laser sintering. 12. A radiation detector, comprising:an array of 2D collimators, the 2D collimators of the array comprising 2D collimator modules arranged in series, adjacent ones of the 2D collimator modules being glued together to establish a fixed mechanical connection to facing module sides of the 2D collimator modules, relatively outer ones of the 2D collimator modules including at least one retaining element on at least one remaining side, the retaining element including a screw mechanism for mounting each of the 2D collimators of the array opposite a detector mechanism, whereineach of the 2D collimators of the array is replaceable independently of the remaining ones of the 2D collimators of the array, andeach of outer ones of the 2D collimators being formed as one piece and including one 2D collimator module.