Needle Trajectory Planning in Rotational X-Ray Imaging
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Solution Overview
Problem
Current needle-guided percutaneous interventions face challenges with poor visualization of bony structures and soft tissue in ultrasonic imaging, and limited patient access and sterility issues in CT-guided procedures, requiring a tedious trial-and-error method for defining needle trajectories in rotational X-ray imaging.
Innovation Solution
A targeting method using C-arm based X-ray devices that allows users to select a two-dimensional image from a three-dimensional data volume, determine a target point, and generate a suitable path for needle insertion by scrolling and rotating the image, with graphical representations to ensure accurate needle trajectory planning and visibility of targets and clinical regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If ultrasonic imaging is used for needle-guided interventions, then real-time visualization of soft tissue structures is improved, but visualization of bony structures and air-filled structures deteriorates
Solution Approach 1:
The patent combines ultrasonic imaging data with CT or MRI data to create a fused image that displays both soft tissue structures (visible in ultrasound) and bony structures (visible in CT/MRI) in a single comprehensive view, eliminating the need to switch between different imaging modalities
2Illumination intensity
If CT-guided interventions are used, then contrast resolution and visualization of anatomical structures is improved, but patient access and room sterility deteriorate
Solution Approach 1:
The patent merges the high contrast resolution capability of CT/MRI with the ease of patient access and sterility maintenance of ultrasonic imaging by using fused images that can be displayed on portable ultrasonic systems, allowing procedures to be performed at the patient's bedside without requiring a dedicated CT room
3Measurement precision
If trial and error method is used to define needle trajectory in cross-sectional slices, then entry point and target definition is achieved, but procedure time and complexity increase
Solution Approach 1:
The patent performs preliminary planning by displaying the three-dimensional data volume with the target point and allowing scrolling and rotating to visualize the suitable path of approach before the actual needle insertion, enabling the operator to define the entry point and trajectory in advance rather than through trial and error during the procedure
Solution Approach 2:
The patent transitions from two-dimensional cross-sectional slice navigation to three-dimensional volume visualization, allowing operators to rotate and scroll through the 3D data to intuitively understand the spatial relationship between entry point, path, and target, thereby simplifying trajectory definition
Data Source
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AI summary
This invention will introduce a fast and effective target approach planning method preferably for needle guided percutanuous interventions using a rotational X-ray device. According to an exemplary embodiment A targeting method for targeting a first object in an object under examination is provided, wherein the method comprises selecting a first two-dimensional image of an three-dimensional data volume representing the object under examination, determining a target point in the first two- dimensional image, displaying an image of the three-dimensional data volume with the selected target point. Furthermore, the method comprises positioning the said image of the three-dimensional data volume by scrolling and/or rotating such that a suitable path of approach crossing the target point has a first direction parallel to an actual viewing direction of the said image of the three-dimensional data volume and generating a second two-dimensional image out of the three-dimensional data volume, wherein a normal of the plane of the second two-dimensional image is oriented parallel to the first direction and crosses the target point.