Movable Detector Array for Radiotherapy Imaging Under Radiation Exposure
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Solution Overview
Problem
Radiation detection systems in radiotherapy devices suffer from detector degradation due to exposure to high levels of radiation, leading to reduced image quality and increased maintenance costs, as traditional radiation-resistant detectors are expensive and non-resistant detectors fail quickly.
Innovation Solution
A radiation detection system using a carousel, belt, or bank of interchangeable detectors that move in and out of the radiation path based on triggers such as time intervals, radiation dosage, or image quality deterioration, allowing cheaper, non-radiation-resistant detectors to be used while minimizing exposure and extending their lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radiation-resistant detectors are used, then detector reliability is improved, but device cost increases
Solution Approach 1:
The patent implements a dynamic detector system where detectors can be moved between an imaging position (in the radiation path) and a protected position (out of the radiation path). This dynamic positioning allows the use of cheaper, non-radiation-resistant detectors while maintaining system reliability by periodically removing them from harmful radiation exposure.
Solution Approach 2:
The system employs periodic action by alternating detectors between imaging and protected positions at scheduled intervals or based on accumulated radiation dose thresholds. This periodic repositioning prevents detector degradation while allowing cost-effective detectors to be used, resolving the contradiction between reliability and cost.
2Productivity
If detectors are continuously exposed to radiation, then imaging productivity is improved, but detector lifespan decreases
Solution Approach 1:
The movable detector positioning system dynamically adjusts detector exposure to radiation by transitioning between imaging and protected positions. This allows the system to maintain high imaging productivity when needed while extending detector lifespan by periodically removing them from the radiation path, preventing continuous degradation.
Solution Approach 2:
The system performs preliminary action by proactively moving detectors out of the radiation path before significant degradation occurs, based on predetermined time intervals or accumulated dose thresholds. This prevents detector failure while maintaining imaging productivity during operational periods.
3Reliability
If detectors are frequently replaced, then detector reliability is maintained, but maintenance time increases
Solution Approach 1:
The system implements periodic action by automatically managing detector rotation and replacement on a scheduled basis, rather than waiting for failure. This maintains detector reliability through systematic renewal while minimizing maintenance time by planning replacements in advance and using automated positioning mechanisms.
Solution Approach 2:
The dynamic detector positioning and replacement system automatically manages detector lifecycle by moving detectors between active and standby positions. This maintains reliability without frequent manual interventions, as the system handles detector rotation and replacement automatically based on usage criteria.
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
This approach extends detector lifespan, reduces maintenance downtime, and enables high-quality imaging with cost-effective detectors by alternating their exposure to radiation, thus balancing performance and cost effectively.
Implementation Method 1
a scintillator used to convert X-rays into light
Data Source
Figure 1a
Figure 1b
Figure 2
AI summary
There is provided a radiation detection system for a radiotherapy device comprising: a plurality of detectors moveable to position each detector in turn in an imaging position to detect radiation.