Polarization Imaging for Precise Cerenkov Dose Measurement
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Solution Overview
Problem
Existing Cerenkov-based dosimetry methods face challenges in providing precise, perturbation-free, real-time, and high-resolution dose measurements due to the anisotropic nature of Cerenkov radiation, which complicates dose calculations and requires additional secondary scintillators to bypass these issues.
Innovation Solution
A method and system utilizing polarization imaging to determine radiation dose by capturing polarized signals from radio-luminescent elements, such as Cerenkov radiation, through a polarization sensitive sensor, and applying correction factors based on the degree and angle of linear polarization, enabling accurate dose determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Cerenkov-based dosimetry is used for real-time dose measurements, then measurement speed is improved, but measurement precision deteriorates due to anisotropic radiation patterns
Solution Approach 1:
The patent applies parameter changes by utilizing the polarization state of Cerenkov radiation as an additional measurement parameter. By measuring both the intensity and polarization angle of Cerenkov light, the system transforms a single-parameter measurement (intensity only) into a multi-parameter measurement, enabling simultaneous determination of dose magnitude and anisotropic distribution characteristics. This resolves the contradiction by using parameter transformation to maintain precision while preserving real-time measurement capability.
Solution Approach 2:
The patent introduces polarization analysis as an intermediary measurement mechanism between the Cerenkov radiation source and the detector. Instead of directly measuring dose from anisotropic radiation, the system first measures the polarization state of the radiation, which serves as an intermediate parameter that encodes information about the anisotropic distribution. This intermediary measurement enables accurate dose reconstruction without compromising measurement speed.
2Measurement precision
If secondary scintillators are added to bypass anisotropic issues, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent extracts and utilizes the intrinsic polarization property of Cerenkov radiation itself to correct for anisotropic effects, rather than adding external correction mechanisms like secondary scintillators. By taking out and analyzing the polarization information already present in the Cerenkov signal, the system achieves precision improvement without increasing device complexity. This eliminates the need for additional components while maintaining measurement accuracy.
Solution Approach 2:
The patent implements self-service by using the Cerenkov radiation's own polarization characteristics to correct its own anisotropic measurement errors. The system measures the polarization state of the radiation and uses this information to reconstruct the true dose distribution, allowing the primary radiation signal to serve its own correction function. This self-correcting mechanism avoids the need for separate correction devices or additional scintillators.
3Measurement precision
If polarization imaging is implemented to correct anisotropic effects, then measurement precision is improved, but ease of operation deteriorates due to complex polarization analysis
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing the relationship between polarization angles and anisotropic correction factors. Before actual dose measurements, the system establishes lookup tables or calibration curves that map polarization states to correction parameters. During operation, the system simply queries these pre-computed values based on measured polarization angles, avoiding complex real-time calculations. This preliminary preparation maintains measurement precision while significantly simplifying operational 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 method achieves dose measurements with deviations within 5% of reference calculations, offering real-time, high-resolution, and perturbation-free dose measurements by leveraging the intrinsic polarization of Cerenkov and scintillation signals, improving precision and reducing errors in dose estimation.
Implementation Method 1
determining a degree of linear polarization and an angle of linear polarization of the at least one polarized signal based on at least one predetermined polarization transmission axis
Implementation Method 2
the radio-luminescent element comprises Cerenkov radiation
Implementation Method 3
Given the intrinsic polarization of Cerenkov and scintillation signals
Implementation Method 4
the radio-luminescent element is a scintillation element
Data Source
AI summary
A method and system for determining a radiation dose is provided. The method can include receiving at least one polarized signal from a radio-luminescent element and determining a degree of linear polarization and an angle of linear polarization of the at least one polarized signal based on at least one predetermined polarization transmission axis. The system can include a polarization sensitive sensor for capturing at least one polarized signal from a radio-luminescent element; and a processor. The processor can be configured to: receive the at least one polarized signal; and determine a degree of linear polarization and an angle of linear polarization of the at least one polarized signal based on at least one predetermined polarization transmission axis.