X-Ray Image Geometry Measurement Using Adapted Object Models
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Solution Overview
Problem
Existing 2D X-ray images lack accurate geometric measurements due to reduced spatial information, limiting quantitative analysis, and additional imaging for 3D information increases radiation dose and workflow complexity.
Innovation Solution
A device and method that utilize shape-related information to adapt a generic object model into an individual model, applying an image processing modificator for improved geometry measurements and scatter correction in X-ray images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional X-ray images are acquired from different viewpoints to achieve 3D image information, then measurement accuracy is improved, but radiation dose increases and workflow becomes more complex
Solution Approach 1:
The patent applies 3D information from CT scans to correct 2D X-ray measurements by introducing depth dimension data. The system overlays 3D anatomical information onto 2D radiographs, enabling accurate geometric measurements without acquiring additional 2D images from multiple viewpoints, thus avoiding increased radiation exposure.
Solution Approach 2:
The patent creates a digital copy of the patient's anatomy from a single CT scan that can be repeatedly used to correct multiple 2D X-ray measurements. This single 3D dataset serves as a reference model for correcting various measurements across different 2D projections without requiring additional imaging.
2Measurement precision
If additional X-ray images are acquired from different viewpoints to achieve 3D image information, then measurement accuracy is improved, but workflow complexity increases
Solution Approach 1:
The patent performs 3D scanning and model creation in advance during the CT scan, storing the anatomical data for later use. When 2D X-ray measurements are needed, the pre-created 3D model is automatically retrieved and applied for correction, eliminating the need for complex real-time multi-viewpoint imaging workflows.
Solution Approach 2:
The patent creates a universal 3D anatomical model from a CT scan that can be used to correct multiple different 2D measurements and serve various diagnostic purposes. This single 3D dataset provides comprehensive geometric information that replaces the need for multiple specialized 2D imaging protocols.
3Object-affected harmful factors
If 2D X-ray images are used for geometric measurements, then radiation dose is reduced and workflow is simplified, but measurement accuracy deteriorates due to lost spatial information
Solution Approach 1:
The patent introduces a 3D anatomical model as an intermediary between the 2D X-ray image and the measurement process. This 3D model provides the missing depth information that cannot be obtained from 2D projections alone, enabling accurate measurements while maintaining the simplicity and low radiation dose of 2D imaging.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances accuracy of bone length measurements and provides improved image processing, including scatter correction, without increasing radiation dose or workflow complexity.
Implementation Method 1
an X-ray source and an X-ray detector, wherein the X-ray source is provided to emit X-ray radiation
Implementation Method 2
For example, the accuracy of bone length measurements is affected by uncertainties about the magnification factor which is due to the cone-beam geometry of the X-ray beam
Implementation Method 3
The processing unit is configured to adapt the generic object model based on the shape related information in order to generate an individual object model
Data Source
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AI summary
The present invention relates to processing X-ray images of an object. In order to improve the accuracy for interactive geometrical measurements, a device (10) for processing of an X-ray image of an object (30) is provided. The device comprises an input unit (12) and a processing unit (14). The input unit is configured to provide a shape related information (16) from an object (30) to be irradiated. The input unit is also configured to provide a generic object model (20), and to provide an actual X-ray image (18) of the object. The processing unit is configured to adapt the generic object model based on the shape related information in order to generate an individual object model (22). The processing unit is also configured to determine, based on the individual object model, an individual image processing modificator (24) for processing at least one part of the X-ray image, and to apply the individual image processing modificator for further processing of the X-ray image.