Mobile C-arm 3D Imaging Trajectory Adaptation
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Solution Overview
Problem
Mobile C-arm imaging systems face challenges in comparing 3D volumetric reconstructions due to potential misalignment during second acquisitions, as the device can be moved freely and may not be in the same position as the first acquisition, making it cumbersome to achieve sufficient overlap for diagnostic purposes.
Innovation Solution
A device comprising a location information receiver, processor, and trajectory adaptor that calculates and adapts a second X-ray imaging trajectory to improve the comparability of first and second reconstruction volumes by determining location information and calculating an adapted trajectory for acquiring X-ray images in a second position, ensuring increased overlap and comparability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a mobile C-arm is moved freely by an operator for a second acquisition, then the device can be repositioned to a different location, but the comparability of the reconstructed 3D volumes deteriorates due to misalignment and insufficient overlap
Solution Approach 1:
The system performs preliminary actions by receiving location information of the first reconstruction volume and the planned second trajectory before the second acquisition is executed. It calculates the resulting second reconstruction volume and determines its location information in advance, allowing the system to predict and correct potential misalignment issues before they occur.
Solution Approach 2:
The system implements feedback by determining the degree of comparability between the first and second reconstruction volumes based on their location information. This feedback mechanism allows the system to evaluate the expected overlap and comparability, and use this information to calculate an adapted second trajectory that improves the degree of comparability.
2Ease of operation
If an operator manually repositions the mobile C-arm for a second acquisition, then the device can be moved to a new position, but the complexity of achieving sufficient overlap increases due to the need for precise manual positioning
Solution Approach 1:
The system performs self-service by automatically calculating the adapted second trajectory based on location information and comparability assessment. The trajectory adaptor component enables the system to self-adjust the imaging trajectory without requiring manual intervention from the operator, thereby simplifying the operation while maintaining high precision.
Solution Approach 2:
The system introduces an intermediary computational process that mediates between the planned second trajectory and the actual imaging execution. By calculating the degree of comparability and determining an adapted trajectory through computational analysis of location information, the system acts as an intermediary that simplifies the operator's task while ensuring precise alignment.
3Measurement precision
If the X-ray imaging device remains in the same position for both acquisitions, then the comparability of reconstruction volumes is improved, but the adaptability of the mobile system is reduced
Solution Approach 1:
The system applies dynamics by enabling the imaging trajectory to adapt based on the device's actual position. Rather than requiring the device to remain static, the system dynamically calculates an adapted second trajectory that accounts for the device's mobility and repositioning, thereby maintaining volume comparability while preserving the system's adaptive capabilities.
Data Source
AI summary
The present invention relates to matching a field of view for mobile 3D imaging, for example mobile C-arm 3D imaging In order to provide image data that is improved for comparing purposes, for example when using a mobile X-ray imaging system, first location information of a first reconstruction volume based on a first sequence of X-ray images of a region of interest of a subject acquired along a first trajectory in a first position of an X-ray imaging device is received. Further, a planned second trajectory for acquiring a second sequence of X-ray images in a second position of the X-ray imaging device is received and a resulting second reconstruction volume for the second sequence of X-ray images is calculated. Then, second location information for the second reconstruction volume is determined. Further, a degree of comparability for the first reconstruction volume and the second reconstruction volume is determined based on the first location information and the second location information. An adapted second trajectory is calculated that results in an increased degree of comparability of the first reconstruction volume and the second reconstruction volume. The adapted second trajectory is provided for acquiring the second sequence of X-ray images in the second position of the X-ray imaging device.