Method and devices for outputting x-ray information stored in a memory phosphor layer

Abstract

The invention relates to a method and corresponding devices for output of x-ray information stored in a memory phosphor layer (1), wherein a stimulation light beam, which can excite the memory phosphor layer (1) to emit emission light, is deflected by a deflecting element and thus moved alternately across the memory phosphor layer (1) in a first direction (V) and in a second direction (R), opposite the first direction (V), and, during the movements of the stimulation light beam in the first and second direction (V and R), emission light emitted from the memory phosphor layer (1) is detected by means of a detector and converted into correspondingly first or second detector signals. In order to eliminate or at least to reduce any image artefacts in as simple and reliable a manner as possible, first and second detector signals, which were received during the movements of the stimulation light beam across the memory phosphor layer (1) or a reference object in the first and second direction (V and R), are compared to one another. The first and / or second detector signals, which were received during the movements of the stimulation light beam over the memory phosphor layer (1) in the first and second direction (V and R), are corrected on the basis of the result of said comparison.

Description

Technical field [0001] The invention relates to a method and a corresponding device for reading X-ray information stored in a luminescent material layer of a memory according to the preamble of the independent claim. Background technique [0002] One possibility for recording X-ray images is to store the X-ray radiation passing through an object, for example a patient, as a latent image in a so-called memory phosphor layer. In order to read the latent image, the memory luminescent material layer is irradiated with excitation light and is excited here to emit emission light. [0003] The emitted light whose intensity corresponds to the image stored in the luminescent material layer of the memory is detected by the optical detector and converted into an electrical signal. The electrical signal is further processed as required, and finally provided for analysis, especially for medical diagnostic purposes, by outputting the electrical signal at a corresponding output device such as a ...

AI Technical Summary

Problems solved by technology

Here, disturbing artifacts can appear in the image composed of the separately acquired detector signals

Images