Arrangement for the reversible change in the focal distance of a scattered radiation grid and method for adjusting the focal distance of a scattered radiation grid

摘要

Arrangement for the reversible change in the focal distance of a scattered radiation grid (1) for an x-ray radiation (8), wherein the antiscatter grid is formed from– alternately stacked for the x-ray radiation (8) transparent first lamellae (29) and– the x-ray radiation (8) absorbing second lamellae (3),– a for the x-ray radiation (8) transparent cover plate (4), on which the first and second plates (2, 3) perpendicular to the direction of the stack (9) arranged and are fixedly connected with it,– a for the x-ray radiation (8) a transparent, flat, reversibly expandable, the cover plate (4) parallel opposite focusing means (5) on which the first and second plates (2, 3) with the focusing means (5) are arranged upright in operative connection, and– at least one mechanical adjusting element (6), which is formed, at least one tensile force (f) only to the focusing means (5), wherein the focusing means (5) only parallel to the cover plate (4) is stretched in a plane, and– the first and second plates (2, 3) its focus orientation can be changed, so that the focal distance (12) is changeable.