Brachytherapy Conduit Verification Using Optical Reference Markers
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Solution Overview
Problem
Current brachytherapy position verification systems are inadequate for accurately confirming the placement of conduits within patients, leading to potential misalignment and inaccurate radiation treatment due to reliance on indirect measurements and lack of integration with treatment delivery systems, which can result in inefficiencies and human errors.
Innovation Solution
A position verification system comprising an elongate control element with a verification element that detects reference markers along the conduit, transmitting signals to a controller for precise positioning verification, integrated with an afterloader to ensure accurate radiotherapy source placement and synchronization with imaging and tracking data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If indirect measurements are used to determine radiotherapy source positioning, then the system can determine source location based on available data, but measurement precision deteriorates due to snaking, bunching, or slack in wires creating inaccurate determinations
Solution Approach 1:
The patent replaces indirect mechanical measurements (wire insertion depth, transfer tube connections) with direct optical detection. The verification element uses optical sensors to detect reference markers on the conduit, providing direct visual confirmation of conduit position and orientation without relying on mechanical measurement assumptions that are affected by wire snaking or slack
Solution Approach 2:
The patent introduces reference markers as intermediary objects attached to the conduit. These markers serve as mediators between the verification system and the conduit, enabling direct optical detection of conduit position and orientation. The markers provide unambiguous spatial information that eliminates the inaccuracies inherent in indirect mechanical measurements
2Object-affected harmful factors
If treatment delivery is performed in a shielded room incompatible with imaging devices, then radiation safety is ensured, but the ability to verify conduit positioning deteriorates due to lack of imaging capability
Solution Approach 1:
The patent extracts the imaging function from the treatment delivery room environment. Instead of requiring advanced imaging devices in the shielded treatment room, the system uses a verification element that can detect reference markers with simple optical sensors, separating the complex imaging requirement from the basic verification function
Solution Approach 2:
The patent creates a simplified copy of the imaging function. Rather than using full medical imaging devices, the verification element uses optical sensors to detect reference markers, providing sufficient verification information through a simpler, more accessible sensing approach that works in the treatment delivery environment
3Adaptability or versatility
If multiple systems (imaging, tracking, treatment delivery) are used separately, then each system can perform its specific function, but loss of information occurs due to inability to synchronize positioning data across systems
Solution Approach 1:
The patent merges positioning verification into the treatment delivery system itself. The verification element is integrated with the afterloader, combining the treatment delivery function with conduit verification. This integration ensures that positioning data and treatment delivery data are synchronized within a single system, eliminating information loss between separate systems
Solution Approach 2:
The patent implements feedback by having the verification element continuously monitor conduit position during treatment delivery and provide real-time verification information to the control system. This feedback loop ensures synchronization between positioning data and treatment delivery data, preventing information loss that would occur with separate systems
Data Source
AI summary
In one embodiment, a verification system for confirming the position of a conduit inserted within a patient may include an elongate control element dimensioned for insertion within the conduit. The control element has a proximal end and a distal end, and a verification element coupled to a distal region. The verification element may be configured to detect the presence of a reference marker associated with the conduit and communicate a signal indicative of the position of the reference marker relative to the verification element. The control element may also be configured to maneuver the verification element along a length of the conduit. The system may also include a drive device coupled to a proximal region of the control element for controlling movement of the control element through the conduit, a controller associated with the verification element and configured to communicate with the verification element, and a signal conductor for conducting the signal between the verification element and the controller.