Method, Computing Unit, CT System and C-Arm System for Reduction of Metal Artifacts in CT Image Datasets

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This invention presents a method and an associated system for reducing metal artifacts in computed tomography (CT) image datasets. It combines various filtered CT images, adjusting their weighting based on how close image areas are to metal objects, resulting in clearer CT images even when metal (such as implants) is present. The approach can be implemented in both standard CT and C-arm imaging systems.

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

• Improving diagnostic accuracy in patients with metal implants (e.g., dental fillings, joint replacements) during CT scans.
• Enhancing image quality in interventional radiology where C-arm imaging is used and metallic tools or devices are present.
• Facilitating better planning and evaluation of surgeries by providing clearer images around metallic objects.
• Reducing artifacts in research studies involving animal models with implanted devices.

BenefitsContent extracted from patent full text and abstract with AI.

• Provides clearer and more accurate CT images in the presence of metal, minimizing diagnostic errors.
• Improves the capability of existing CT and C-arm systems to handle cases with metallic implants without extensive hardware modifications.
• Leads to more reliable treatment planning and follow-up for patients with metal-based medical devices.
• Can be implemented as a software-based solution, potentially reducing costs compared to hardware alternatives.

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Patent Abstract

A method is disclosed for reducing metal artifacts in CT image datasets. An embodiment of the method includes reconstructing a first CT image dataset with and a second CT image dataset without metal artifact correction, weighted summation of a high-pass-filtered first and a high-pass-filtered second CT image dataset plus a low-pass-filtered second CT image dataset, wherein the weightings are dependent on the proximity to metal in the CT image datasets. A computing unit, a CT system and a C-arm system designed to execute the method are also disclosed.