Method for Correction of Truncation Artifacts

Simple SummaryContent extracted from patent full text and abstract with AI.

This invention presents a method for correcting truncation artifacts in computed tomography (CT) images. By simulating an extended x-ray detector and extending the coverage area in both axial and transaxial directions, the method improves the accuracy of CT image reconstruction, especially at the edges of the image where data is usually missing. Different approaches are provided for adapting the correction to various orientations and positions of image filter lines.

Use CasesContent extracted from patent full text and abstract with AI.

• Improving the accuracy of medical CT scans in hospitals and diagnostic centers
• Enhancing image quality in dental, veterinary, or industrial CT imaging applications
• Supporting research in radiology by providing clearer images for analysis
• Assisting the development of advanced imaging software and algorithms for CT scan manufacturers

BenefitsContent extracted from patent full text and abstract with AI.

• Reduces or eliminates image artifacts caused by detector truncation, leading to clearer and more reliable CT scans
• Improves diagnostic accuracy by ensuring complete imaging data, especially at image peripheries
• Adaptable to different types of filter lines and imaging system configurations
• Enables better patient outcomes by supporting precise medical assessments
• Can be integrated into existing CT imaging workflows and equipment

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Patent Abstract

The invention relates to a method for correcting truncation artifacts in a reconstruction method for computed tomography recordings. The projection images are recorded by an x-ray image detector being extended by determining the attenuation of the radiation outside the projection image for pixels. Non-horizontal filter lines are extended by transaxial and axial artificial extension of the x-ray image detector for the purposes of truncation correction. The truncation correction for non-horizontal filter lines being carried out according to a method from at least one of the following groups: truncation correction takes place regardless of the specific location and orientation of the filter lines; truncation correction takes place as a function of the specific position and orientation of the filter lines, with the filter lines themselves being retained; and truncation correction takes place by introducing new modified filter lines, with filtering taking place along offset artificially extended filter lines.