Method, data carrier and device for recording x-ray images for determining the current distribution of an x-ray tube

Abstract

The invention relates to a method for determining a tube current distribution for recording at least one X-ray image of a body region of a patient with an X-ray image recording device, a corresponding computer program, a machine-readable data carrier and an X-ray image recording device. The method comprises the steps of: -acquiring an image recorded by means of an optical sensor, wherein the image has a field of view comprising at least a body region of the patient to be delineated by means of the X-ray image, -determining from the image at least one strip for the patient patient-specific body-related information, - with reference to the at least one piece of patient-specific body-related information to determine at least an X-ray attenuation assignment of the patient for the body region to be delineated by means of the X-ray image, and - with reference to the determined X-ray The ray attenuation distribution is used to determine the tube current distribution.

Description

technical field [0001] The invention relates to a method for determining a tube current profile, a corresponding computer program, a data carrier and an X-ray image recording device. Background technique [0002] Imaging X-ray devices such as, for example, C-arm X-ray devices or computed tomography devices are increasingly used to clarify medical questions. The use of X-rays exposes patients to increasing amounts of radiation such that appropriate and dose-optimized use, as defined by ("reasonably acceptably low"), is necessary in each examination. Therefore, the aim of medical imaging is to generate one or more x-ray images by applying the lowest possible x-ray dose to the patient. [0003] Different measures are used to achieve this. One approach to dose optimization is to adapt the X-ray tube current to the individual X-ray attenuation characteristics of the patient. [0004] For this purpose, modern X-ray image recording devices have automatic dose control systems for...

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Problems solved by technology

[0007] The disadvantage of this known dose optimization program is that, in addition to the actual x-ray image recorded with the x-ray image recording device, the recording of the positional representation of the internal storage information produces an additional, non-negligible proportion of the overall dose for the patient.

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