Intraoperative CT Trajectory Navigation System
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Solution Overview
Problem
There is a need for more accurate implementations of a surgical trajectory during surgical interventions, such as in the brain, to minimize deviations from the original surgical plan and reduce the number of brain penetrations and procedure time.
Innovation Solution
The use of intraoperative computerized tomography (iCT) scans to accurately project and adjust the surgical trajectory prior to inserting an interventional device into the brain, leveraging a precision trajectory aiming system with a CT-visible device and an XY stage for continuous adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical navigation is used for trajectory guidance, then the procedure can be performed with standard equipment, but the accuracy of surgical trajectory placement is insufficient leading to deviations from the original surgical plan
Solution Approach 1:
The patent introduces an intraoperative CT scanner as an intermediary verification tool between trajectory planning and device insertion. The CT scanner provides actual imaging of the patient's anatomy during surgery, allowing real-time verification and adjustment of the trajectory before final device insertion, thereby eliminating reliance on potentially inaccurate optical navigation alone
Solution Approach 2:
The system implements a feedback loop where intraoperative CT images are acquired, processed to generate trajectory verification information, and used to adjust the surgical trajectory before final device insertion. This closed-loop feedback mechanism ensures high placement accuracy by continuously verifying the trajectory against the original surgical plan
2Measurement precision
If multiple brain penetrations are performed to ensure accurate placement, then the final placement accuracy improves, but the procedure time increases and patient risk increases
Solution Approach 1:
The patent performs preliminary verification of the surgical trajectory using intraoperative CT scanning before the final device insertion. By verifying the trajectory in advance with actual imaging data and making adjustments if needed, the system ensures accurate placement on the first attempt, eliminating the need for multiple corrective brain penetrations and reducing overall procedure time
3Productivity
If traditional optical navigation is used without intraoperative CT verification, then the procedure is faster to set up, but the number of brain penetrations increases to compensate for accuracy issues
Solution Approach 1:
The patent replaces reliance on mechanical optical navigation systems with actual intraoperative CT imaging for trajectory verification. The CT-based verification system provides direct visual confirmation of trajectory accuracy, substituting the indirect optical tracking method and eliminating the need for multiple corrective penetrations, thereby improving both accuracy and overall procedure efficiency
Data Source
AI summary
Systems and methods are configured to adjust a surgical trajectory pursuant to a surgical intervention. The systems and methods are configured to grossly align an aiming device to the target surgical trajectory wherein the aiming device is coupled to a patient. An intraoperative computerized tomography (iCT) scan is used to obtain an image of a surgical field. An actual trajectory of a CT-visible element is obtained and extended forward down to a surgical plan's target depth for comparison to the target surgical trajectory. The actual trajectory is adjusted to obtain an adjusted trajectory prior to insertion of a device via the aiming device into the patient.