Scintillating Fiber Radiation Dose Mapping
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Solution Overview
Problem
Current external beam radiation therapy lacks real-time multi-dimensional tissue dose distribution measurement, relying on simulations that do not provide actual dose distribution, leading to potential over or under exposure of tissues during cancer treatment.
Innovation Solution
The use of scintillating materials in radiation detectors, such as scintillating fibers, embedded in catheters or balloons, to measure and characterize radiation sources and beams in vivo and ex vivo, allowing for real-time detection and adjustment of radiation dosage during treatments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If Monte Carlo simulations are used to calculate dose distribution, then tissue density mapping can be obtained, but actual measured dose distribution is not provided
Solution Approach 1:
The patent introduces scintillating materials as intermediary substances that convert radiation energy into light signals, which are then detected by photodetectors. This intermediary conversion process enables direct measurement of radiation dose distribution in tissue, bridging the gap between simulation-based estimates and actual dose delivery verification.
Solution Approach 2:
The patent replaces computational Monte Carlo simulation methods with a physical detection system using scintillating materials and photodetectors. This substitution transitions from indirect calculation to direct physical measurement, providing real-time feedback on actual radiation dose distribution in the treatment field.
2Loss of time
If post-irradiation techniques are used to assess dose, then crude assessment can be obtained, but real-time measurement is not possible
Solution Approach 1:
The patent implements continuous real-time dose measurement during radiation therapy delivery using implantable scintillating materials. The system continuously converts radiation exposure into optical signals that are immediately detected and processed, enabling uninterrupted monitoring of dose accumulation throughout the treatment session rather than waiting for post-irradiation assessment.
Solution Approach 2:
The patent employs preliminary implantation of scintillating materials into the treatment field before radiation delivery begins. This preliminary placement ensures that the detection system is already in position to capture dose distribution data from the moment radiation exposure starts, enabling real-time measurement rather than delayed post-treatment assessment.
3Ease of operation
If treatment plan adjustments are made without real-time data, then workflow simplicity is maintained, but dosage accuracy cannot be optimized
Solution Approach 1:
The patent establishes a closed-loop feedback system where scintillating materials continuously monitor radiation dose distribution and provide real-time data to the treatment planning system. This feedback enables dynamic adjustment of treatment parameters during delivery to optimize dosage accuracy while maintaining workflow efficiency through automated data processing and analysis.
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
Enables accurate measurement and adjustment of radiation dosage distribution during treatments, improving tumor targeting and minimizing healthy tissue irradiation by providing actual, real-time data for more precise radiation delivery.
Implementation Method 1
at least one radiation detector, including scintillating material, emitting a light level in proportion to sensed incident levels of radiation
Data Source
AI summary
An apparatus and method for in vivo and ex vivo control, detection and measurement of radiation in therapy, diagnostics, and related applications accomplished through scintillating fiber detection. One example includes scintillating fibers placed along a delivery guide such as a catheter for measuring applied radiation levels during radiotherapy treatments, sensing locations of a radiation source, or providing feedback of sensed radiation. Another option is to place the fibers into a positioning device such as a balloon, or otherwise in the field of the radiation delivery. The scintillating fibers provide light output levels correlating to the levels of radiation striking the fibers and comparative measurement between fibers can be used for more extensive dose mapping. Adjustments to a radiation treatment may be made as needed based on actual and measured applied dosages as determined by the fiber detectors. Characteristics of a radiation source may also be measured using scintillating materials.