Virtual Trajectory Planning for Intracorporeal Needle Positioning
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Solution Overview
Problem
Current medical needle positioning methods require multiple corrections, causing patient stress and exposing healthcare professionals to radiation, especially when using imaging-assisted techniques with complex needle guides and close needle perforation openings.
Innovation Solution
A method involving a spatially fixed needle guide with cross-sectional imaging and virtual trajectory planning, allowing doctors to predetermine and visualize the ideal puncture channel on a patient's skin, avoiding radiation exposure and reducing procedural complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If imaging-assisted techniques with complex needle guides are used, then measurement precision is improved, but device complexity increases and radiation exposure occurs
Solution Approach 1:
The patent creates a virtual copy of the needle guide and needle trajectories in the planning software, allowing precise measurement and visualization without physical complexity. The virtual model enables accurate planning of needle paths through 3D imaging data while avoiding the need for complex physical guidance devices during the procedure.
Solution Approach 2:
All needle positioning planning is performed in advance using imaging data and virtual trajectory calculation. The optimal puncture channels are determined before the actual procedure, allowing precise needle placement without requiring complex real-time guidance devices during the intervention itself.
2Manufacturing precision
If multiple puncture corrections are performed, then manufacturing precision is improved, but loss of time increases and patient stress increases
Solution Approach 1:
The system performs comprehensive planning of all needle trajectories and puncture channels before the actual procedure. By calculating optimal paths in advance using 3D imaging and virtual simulation, the system ensures high placement accuracy on the first attempt, eliminating the need for time-consuming corrections during the procedure.
Solution Approach 2:
The planning software provides visual feedback through virtual trajectory display and intersection point calculation, allowing the operator to verify needle paths before execution. This pre-procedure feedback mechanism ensures accuracy is confirmed before the actual puncture, preventing the need for corrective actions.
3Measurement precision
If imaging-assisted techniques are used, then measurement precision is improved, but object-affected harmful factors increase due to radiation exposure
Solution Approach 1:
The system uses pre-acquired 3D imaging data to create a virtual model for planning, eliminating the need for continuous real-time imaging during the procedure. This approach maintains precise positioning capability while avoiding repeated radiation exposure that would occur with intra-procedural imaging guidance.
Solution Approach 2:
All positioning planning is completed beforehand using static imaging data. The virtual trajectory calculation and needle path optimization are performed in advance, allowing precise needle placement without requiring additional imaging procedures during the actual intervention, thereby minimizing radiation exposure.
Data Source
AI summary
A method is described for planning intracorporeal positioning of a puncture needle to be introduced percutaneously into a patient on the basis of a puncture plan, said method comprising the following steps: a) arranging a needle guide means in a spatially fixed manner on the patient; b) generating and storing a series of cross-sectional images, each containing spatially resolved image information of the patient and of the needle guide means attached in a spatially fixed manner to the patient in a first coordinate system, using an imaging diagnostic method; c) selecting and visually displaying at least one cross-sectional image or a numerically generated cross-sectional image from the series of stored cross-sectional images; d) superimposing a virtual, positionally variable linear trajectory on the basis of the selected cross-sectional image; e) positioning the virtual linear trajectory on the basis of the puncture plan to obtain a target linear trajectory, in which the virtual linear trajectory traverses the needle guide means; f) numerically determining spatial coordinates of two separate spatial points, or traverse points, within the first coordinate system, at which traverse points the target linear trajectory traverses the needle guide means; g) transforming the spatial coordinates relating to the needle guide means and to the traverse points to a second coordinate system; and h) visually displaying the needle guide means within the second coordinate system in such a manner that the traverse points are shown visibly marked on the needle guide means.