Dynamic X-ray Imaging Frequency for Radiation Targeting
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Solution Overview
Problem
Current radiation treatment systems face challenges in accurately tracking the movement of targets, such as tumors, during radiation delivery, leading to less than desired accuracy and increased radiation exposure to healthy tissues due to infrequent diagnostic x-ray imaging.
Innovation Solution
An image-guided radiation treatment system that dynamically adjusts the frequency of diagnostic x-ray imaging based on real-time target motion, using a combination of x-ray sources and motion detection devices to ensure precise targeting while minimizing radiation exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If diagnostic x-ray imaging is performed frequently to track target motion, then measurement precision of target position is improved, but radiation exposure to healthy tissue increases
Solution Approach 1:
The system dynamically adjusts the imaging frequency based on real-time target motion characteristics. When target motion is detected to be within acceptable thresholds, imaging frequency is reduced to minimize radiation exposure. When motion exceeds thresholds, imaging frequency is increased to maintain measurement precision. This dynamic adaptation resolves the contradiction by making the imaging frequency responsive to actual target behavior rather than fixed.
Solution Approach 2:
The system changes the parameter of imaging frequency based on measured target motion parameters. By continuously monitoring target position and adjusting the imaging interval parameter accordingly, the system optimizes the balance between measurement precision and radiation dose. The imaging frequency parameter is modified in real-time to match target motion characteristics.
2Object-affected harmful factors
If diagnostic x-ray imaging is performed infrequently to reduce radiation exposure, then radiation exposure to healthy tissue is reduced, but manufacturing precision of treatment delivery deteriorates
Solution Approach 1:
The system implements feedback control by continuously monitoring target motion and using this information to determine optimal imaging timing. The feedback loop adjusts imaging frequency based on actual target behavior, ensuring treatment delivery precision is maintained only when necessary. This feedback mechanism resolves the contradiction by preventing unnecessary imaging while ensuring adequate imaging when target motion affects treatment accuracy.
Solution Approach 2:
The imaging frequency is made dynamic rather than static, adapting to the actual target motion patterns observed during treatment. This dynamic approach ensures treatment precision is maintained by imaging only when target motion exceeds acceptable thresholds, rather than using fixed frequent imaging schedules that unnecessarily increase radiation exposure.
3Ease of operation
If fixed interval imaging is used to simplify system operation, then ease of operation is improved, but measurement precision of target motion deteriorates
Solution Approach 1:
The system performs self-service by automatically determining optimal imaging timing based on measured target motion, eliminating the need for manual scheduling decisions. The system autonomously adjusts imaging frequency according to target behavior, maintaining measurement precision without requiring operator intervention. This self-service capability resolves the contradiction by making the system operationally simple while preserving tracking accuracy.
Solution Approach 2:
The imaging schedule transitions from a fixed static interval to a dynamic adaptive schedule that responds to target motion characteristics. This dynamic scheduling maintains measurement precision by adjusting imaging frequency based on actual target behavior, while the automation preserves ease of operation by eliminating manual scheduling complexity.
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
The system enhances the accuracy of radiation delivery by adjusting imaging frequency according to target movement, reducing radiation exposure to healthy tissues and maintaining high precision in targeting.
Implementation Method 1
a diagnostic x-ray imaging device to image the patient's body
Implementation Method 2
measurement data indicative of target motion
Data Source
AI summary
An image guided treatment is performed to treat a target. To perform the image guided treatment, measurement data indicative of target motion is acquired. A timing of one or more x-ray images is determined based on the measurement data. Treatment may be performed on the target using the position of the target.