Imaging Kit Registration Phantom for X-Ray Stitching Accuracy
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Solution Overview
Problem
Current methods for stitching together multiple small X-ray images to create large-scale images in orthopedic and trauma surgery are hindered by image distortions and the complex path of the C-arm, leading to inaccuracies and reduced clarity in the reproduction of patient features.
Innovation Solution
An imaging kit comprising a base and a registration phantom with radiopaque fiducials, allowing for the registration of 2D or 3D images acquired with an X-ray imaging system. The kit enables precise positioning of the registration phantom over a region of interest, while the base is fixed to a patient's bone outside the surgical field, maintaining a clear surgical site.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple small X-ray images are stitched together to create large-scale images, then the coverage area is increased, but the image distortion and clarity are reduced
Solution Approach 1:
The imaging system divides the large-area imaging task into multiple small-field images captured at different positions, then stitches them together using fiducial markers as reference points for alignment, achieving both large coverage and maintained image quality
Solution Approach 2:
Radiopaque fiducial markers are introduced as intermediary reference objects that appear in multiple images, enabling precise alignment and registration during the stitching process to minimize distortion while maintaining large-area coverage
2Measurement precision
If the base is fixed inside the surgical field, then the registration accuracy is improved, but the surgical accessibility is reduced
Solution Approach 1:
The base is repositioned from the two-dimensional surgical field plane to the three-dimensional space outside the surgical field, allowing the fiducial markers to extend over the surgical site without the base itself obstructing the surgical area
Solution Approach 2:
The fiducial markers serve as intermediaries that connect the base (positioned outside the surgical field) to the region of interest (inside the surgical field), enabling accurate registration without requiring the base to be physically present in the surgical area
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
The imaging kit enhances the accuracy and clarity of large-scale image reconstruction by minimizing distortion and allowing for greater variability in surgical procedures, while maintaining a clear surgical site.
Implementation Method 1
at least one registration phantom having a fiducials support of substantially radiotransparent material comprising a plurality of radiopaque fiducials
Data Source
AI summary
The present invention relates to a method for registration of 2D images of a region of interest of a patient, wherein the images are acquired using an X-ray imaging system and an imaging kit (1) comprising abase (2) and a registration phantom (3), wherein the method comprises the following steps: receiving a first (respectively second) set of 2D X-ray images of at least one first (respectively second) portion of a region of interest, said first and second sets of images comprising each at least two 2D images containing each at least one detectable radiopaque fiducial of the registration phantom (3); registering the first (respectively second) set of images in the coordinate system of the registration phantom in the first (respectively second) phantom fixation position; registering the first and second sets of 2D images in the coordinate system of the base.