Wireless X-ray Detection in C-arm Tracker
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Solution Overview
Problem
Current C-arm tracking systems in computer-assisted surgery face challenges in accurately relating X-ray images to bodily parts due to movement errors between the C-arm tracker and the patient, requiring precise positional recording during image acquisition.
Innovation Solution
A novel X-ray detection device with an X-ray detector unit, transmitter, and receiver for wireless RF signaling, integrated with the C-arm tracker, which detects X-rays and transmits detection signals to the CAS processor system, including a processor to filter and synchronize signals with radiation intensity thresholds, and stores calibration data for tracker calibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If diodes are wired to the CAS processor system to detect and signal X-rays, then X-ray detection accuracy is improved, but device complexity and wiring requirements increase
Solution Approach 1:
The patent replaces the wired mechanical connection system with a wireless communication system. The C-arm tracker incorporates an X-ray detector that wirelessly transmits detection signals to the CAS processor system via radio frequency, eliminating the need for physical wiring between the tracker and processor while maintaining detection accuracy.
Solution Approach 2:
The patent extracts the X-ray detection function from the wired diode system and integrates it directly into the C-arm tracker. This allows the detection capability to be embedded within the tracking device itself, removing the need for separate wired connections to the processor system.
2Measurement precision
If positional relation is recorded at the time of image acquisition, then navigation accuracy is improved, but time sensitivity requirements increase
Solution Approach 1:
The patent implements a feedback mechanism where the X-ray detector on the C-arm tracker continuously monitors for X-ray emissions and immediately transmits detection signals with associated positional data to the processor system. This real-time feedback ensures that positional relations are recorded at the exact moment of image acquisition, maintaining navigation accuracy without time delays.
Solution Approach 2:
The patent prepares the system in advance by having the X-ray detector continuously ready and the wireless transmission system pre-configured. When an X-ray is emitted, the system is already prepared to immediately detect and transmit the signal, eliminating any time delay between image acquisition and positional recording.
3Productivity
If C-arm tracker is integrated with X-ray detector, then real-time detection capability is improved, but device complexity increases
Solution Approach 1:
The patent merges the X-ray detection function with the C-arm tracker by integrating an X-ray detector directly into the tracker device. This combination allows the tracker to simultaneously perform tracking and X-ray detection functions, enabling real-time detection capability while reducing the need for separate detection equipment.
Solution Approach 2:
The patent makes the C-arm tracker a multi-functional device that can perform both tracking operations and X-ray detection. By giving the tracker universal functionality, the system eliminates the need for separate dedicated X-ray detection equipment, and the overall system complexity is managed through integrated design.
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
Enhances accuracy in image-based navigation by eliminating the need for wired connections and providing real-time positional data, ensuring precise image conversion to navigation data without movement errors.
Implementation Method 1
an X-ray detector adapted to be positioned within a radiation field, the X-ray detector emitting a detection signal upon being excited by an X-ray
Implementation Method 2
a transmitter for outputting the detection signal in radio frequency
Data Source
AI summary
A detection device for detecting X rays and signaling the detection to a computer-assisted surgery processor system comprises an X ray detector unit having an X ray detector adapted to be positioned within a radiation field. The X ray detector emits a detection signal upon being excited by an X ray of a given intensity. A transmitter outputs the detection signal in radio frequency. A receiver receives the detection signal in radio frequency and forwards the detection signal to a computer-assisted surgery processor system to signal the detection of the X ray. A method is provided as well.