Cone-Beam CT Lung Navigation Pathways for CT-to-Body Divergence
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Solution Overview
Problem
Existing navigation systems for medical devices within a patient's anatomy suffer from inaccuracies due to CT-to-body divergence, leading to increased surgical times and radiation exposure from fluoroscopic corrections.
Innovation Solution
Utilizing cone beam computed tomography (CBCT) machines to obtain intra-procedural images for real-time navigation, generating 3D models, and registering the location of medical devices like catheters to these images, thereby reducing the need for additional imaging and enhancing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fluoroscopic navigation is used to correct medical device location in real-time, then navigation accuracy is improved, but surgical time increases and radiation exposure increases
Solution Approach 1:
The system performs preliminary actions by acquiring comprehensive 3D anatomical images and creating accurate 3D models before the surgical procedure begins. This pre-procedural planning and modeling allows the medical device location to be tracked and corrected within the pre-established 3D model without requiring additional real-time fluoroscopic imaging, thus maintaining navigation accuracy while reducing surgical time and radiation exposure.
2Measurement precision
If fluoroscopic navigation is used to correct medical device location in real-time, then navigation accuracy is improved, but radiation exposure increases
Solution Approach 1:
The system creates a detailed 3D copy or model of the patient's anatomy using pre-acquired imaging data. This 3D model serves as a virtual representation that can be used for navigation and device tracking without requiring repeated exposure to ionizing radiation from fluoroscopy. The medical device location is tracked and displayed within this 3D copy, eliminating the need for continuous fluoroscopic imaging.
3Loss of time
If CT-to-body divergence is not corrected, then setup time is reduced, but navigation accuracy deteriorates
Solution Approach 1:
The system performs preliminary actions by acquiring comprehensive 3D anatomical images and creating accurate 3D models before the surgical procedure begins. This pre-procedural planning and modeling allows the medical device location to be tracked and corrected within the pre-established 3D model without requiring additional real-time fluoroscopic imaging, thus maintaining navigation accuracy while reducing surgical time and radiation exposure.
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
Improves navigation accuracy and reduces the number of imaging procedures, minimizing surgical time and radiation exposure by using CBCT for real-time updates and registrations.
Implementation Method 1
obtain images of a patient's anatomy using a cone beam computed tomography machine
Implementation Method 2
cone beam computed tomography (CBCT) or fluoroscopy (including 3D fluoroscopy) are employed by clinicians to identify and navigate to areas of interest
Data Source
AI summary
A method of performing a surgical procedure includes obtaining images of a patient's anatomy using a cone beam computed tomography machine while the patient is sedated, identifying an area of interest in the images obtained by the cone beam computed tomography machine, identifying a pathway to the identified area of interest using the images obtained by the cone beam computed tomography machine, and navigating a catheter within the patient's airways to the identified area of interest using the identified pathway.