Method for Reducing Truncation Artifacts and X-ray Device

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This patent describes a method and system for reducing truncation artifacts that occur during the reconstruction of 3D image datasets (such as CT scans) from 2D X-ray projection images. The invention estimates missing image data where parts of the target area, like the head of a patient, are not fully captured in each projection due to truncation. It does this by considering information about the boundary of the patient in the truncated regions for more accurate image reconstruction.

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

• Improving image quality in medical CT scans, especially for head imaging when the patient does not fit entirely in the scanning field.
• Radiology departments looking to minimize image artifacts in 3D reconstruction from limited field-of-view scans.
• Manufacturers of X-ray or CT imaging systems aiming to enhance diagnostic accuracy and patient comfort by supporting partial scans.
• Research facilities processing 3D medical images with incomplete projection data.

BenefitsContent extracted from patent full text and abstract with AI.

• Reduces unwanted image artifacts, leading to clearer and more accurate 3D reconstructions.
• Enables reliable imaging when some anatomy extends beyond the detector's range, which is common in head or large body part scans.
• Can improve diagnostic accuracy by providing radiologists with more trustworthy images.
• Potentially reduces the need for additional scans, lowering radiation exposure and improving workflow efficiency.

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Patent Abstract

Verfahren zur Reduzierung von aufgrund einer Trunkierung entstehenden Artefakten bei der Rekonstruktion eines dreidimensionalen Bilddatensatzes eines Zielbereichs (18) eines Patienten, insbesondere eines Kopfes (4) eines Patienten, aus unter unterschiedlichen Projektionsrichtungen mit einer Röntgeneinrichtung (26) aufgenommenen, zweidimensionalen Projektionsbildern (17), wobei für jedes Projektionsbild (17) in aufgrund der Trunkierung nicht aufgenommenen Trunkierungsanteilen (20) des Projektionsbildes (17) für die Rekonstruktion benötigte Abschätzungsdaten ermittelt werden, wobei bei der Ermittlung der Abschätzungsdaten eine die Begrenzung (22) des Patienten wenigstens in den Trunkierungsanteilen (20) beschreibende Begrenzungsinformation berücksichtigt wird.