Bronchial Biopsy Planning System for Lesion Targeting Accuracy
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Solution Overview
Problem
Current bronchial biopsy methods face challenges in accurately targeting lesions, especially small or distant ones from the bronchial wall, leading to uncertainties in hitting the lesion or determining its benignity, resulting in low hit rates and increased patient risk.
Innovation Solution
A method that calculates the maximum biopsy depth based on lesion extent and position, using imaging techniques like CT, MRI, or X-ray, to determine if the lesion can be reliably hit, and produces a biopsy plan to ensure accurate targeting by comparing calculated and actual biopsy depths, and selecting suitable bronchial branches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If percutaneous biopsy is used to examine pulmonary foci or mediastinal lesions, then tissue can be removed for diagnosis, but the hit rate for centrally positioned lesions is low and the procedure is time-consuming with increased patient risk
Solution Approach 1:
The system performs preliminary 3D reconstruction of the bronchial tree and pre-planning of the biopsy path before the actual procedure. This allows the operator to identify the optimal bronchial branch and insertion point in advance, ensuring the lesion is within reach and can be reliably hit during the biopsy procedure.
Solution Approach 2:
The patent introduces a computer-based planning system as an intermediary between the operator and the biopsy procedure. This system processes imaging data, reconstructs 3D models, calculates reachability, and provides guidance, thereby improving the hit rate while reducing procedure time and patient risk.
2Reliability
If transbronchial biopsy is used for lesions on the inner bronchial wall, then good results can be obtained, but uncertainty arises as to whether the lesion has really been hit
Solution Approach 1:
The system provides feedback by comparing the planned biopsy path with the actual bronchial tree structure. It calculates whether the lesion is within the reachable distance from the selected bronchial branch and provides this information to the operator, reducing uncertainty about whether the lesion can be reliably hit.
Solution Approach 2:
The patent replaces the mechanical trial-and-error approach of traditional bronchoscopy with a computer-based calculation system. This system uses 3D reconstruction and mathematical calculations to determine reachability, substituting physical exploration with computational analysis to reduce uncertainty.
3Measurement precision
If imaging methods are used to create a three-dimensional virtual image of the bronchi and insert the lesion position, then the hit probability during bronchoscopy is raised, but a reliable biopsy is not yielded for small lesions or those far from the bronchial wall
Solution Approach 1:
The system performs preliminary 3D reconstruction and reachability analysis before the biopsy procedure. It calculates the maximum reachable distance from each bronchial branch and determines in advance whether small or distant lesions can be reliably hit, allowing the operator to select appropriate targets or adjust the plan accordingly.
Solution Approach 2:
The patent changes the parameter of lesion selection criteria by incorporating reachability calculations based on 3D reconstruction. Instead of relying solely on visual identification, the system evaluates additional parameters such as distance from bronchial wall, lesion size, and accessibility, thereby improving biopsy reliability for small or distant lesions.
Data Source
AI summary
A method is disclosed for improving the accuracy of a bronchial biopsy. In at least one embodiment, the method includes detecting the position and extent of a lesion to be biopsied by way of imaging methods, calculating the maximum biopsy depth with a known biopsy inaccuracy as a function of the extent of the lesion, and producing a biopsy plan on the basis of the calculated maximum biopsy depth and the position of the lesion. A device is also disclosed for carrying out the method.