Cherenkov Radiation Monitoring for Beam Profile Verification
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Solution Overview
Problem
Current radiation therapy technologies face challenges in accurately monitoring and controlling radiation beam shape and dosage distribution within tissues to maximize tumor dose while minimizing exposure to surrounding normal tissues, particularly in complex beam shaping procedures.
Innovation Solution
A system that utilizes high energy radiation sources, light collection and spectral analysis to determine tissue oxygenation and metabolic functions, employing a phantom for beam profile calibration and imaging to construct a three-dimensional model of radiation emissions, thereby verifying beam shape and dosage profiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If high energy radiation beams are used to treat deep-seated tumors, then tumor penetration and therapeutic ratio are improved, but accurate monitoring of beam shape and dosage distribution becomes more difficult
Solution Approach 1:
The patent uses Cherenkov radiation as an intermediary signal to indirectly monitor beam profile and dosage distribution. Instead of directly measuring the radiation beam properties, the system detects the optical signal (Cherenkov light) generated by the beam's interaction with tissue, which serves as a mediator that carries information about beam characteristics without being directly exposed to the high energy radiation.
Solution Approach 2:
The patent replaces direct mechanical or electronic detection systems with an optical detection system. By converting the radiation beam's energy into optical signals through Cherenkov radiation, the system substitutes complex radiation detection mechanisms with simpler optical sensors (cameras, photodetectors) that can non-invasively monitor beam properties through tissue.
2Manufacturing precision
If complex beam shaping procedures are implemented to deliver precise dosage, then treatment precision is improved, but verification of beam shape and dosage profile becomes more complex
Solution Approach 1:
The patent implements a feedback mechanism where Cherenkov radiation detection provides real-time information about beam shape and dosage distribution. The system captures optical signals during beam delivery and processes them to verify that the beam profile matches the planned prescription, enabling immediate feedback and verification of treatment accuracy without requiring complex additional verification equipment.
Solution Approach 2:
The patent makes the Cherenkov radiation detection system multi-functional, serving both as a monitoring tool for beam profile verification and as a diagnostic tool for tissue oxygenation assessment. This single optical detection system performs multiple verification functions that would otherwise require separate specialized equipment, thereby reducing overall system complexity.
3Reliability
If real-time monitoring of tissue oxygenation and metabolic function is added to radiation therapy, then treatment safety and efficacy are improved, but system complexity increases
Solution Approach 1:
The patent makes the Cherenkov radiation detection system multi-functional, serving both as a monitoring tool for beam profile verification and as a diagnostic tool for tissue oxygenation assessment. This single optical detection system performs multiple verification functions that would otherwise require separate specialized equipment, thereby reducing overall system complexity.
Solution Approach 2:
The system uses the radiation beam's own interaction with tissue (generating Cherenkov radiation) to provide self-diagnostic information about both beam delivery and tissue properties. The beam itself serves as both the treatment agent and the excitation source for optical sensing, eliminating the need for separate monitoring beams or external diagnostic equipment.
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 system effectively monitors and documents radiation therapy by providing precise beam profile verification and tissue oxygenation analysis, enhancing treatment efficacy and safety by ensuring accurate dosage delivery to tumors while minimizing normal tissue exposure.
Implementation Method 1
Charged particles, such us electrons, positrons, protons, or alpha particles, moving at greater than the effective speed of light in a medium tend to slow down while releasing Cherenkov radiation
Implementation Method 2
This light emitted in tissue is attenuated by absorbers in the tissue, and can also excite other molecular species in tissue, inducing their photo-luminescence (fluorescence or phosphorescence)
Data Source
AI summary
A system for providing monitored radiation therapy has a high energy radiation source, apparatus for excluding uncontrolled ambient light, and apparatus for collecting light emitted from a subject. The system has apparatus for spectrally analyzing the collected light, and a processor for determining oxygenation or other metabolic function of tissue within the subject from spectral analysis of the collected light. The system monitors radiation therapy by providing a beam of high energy radiation; collecting Cherenkov and/or photoluminescent light from the subject, the light generated along the beam; spectrally analyzing the light; and determining oxygenation or metabolic function of tissue from the spectral analysis. Beam profile of the system is calibrated by imaging from multiple angles Cherenkov and/or photoluminescent light emitted by a phantom placed in the beam in lieu of a subject, captured images are analyzed to determine beam profile.