3D Volumetric Dose Detector for Stereotactic Radiosurgery
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Solution Overview
Problem
Current dose verification systems for intracranial stereotactic radiosurgery are impractical and costly due to lengthy calibration and data processing times, and they often provide low-resolution, two-dimensional data that require complex calculations to infer three-dimensional dose distributions.
Innovation Solution
A dose verification instrument with a radiolucent support structure and arrays of solid-state electronic radiation detectors on curved surfaces and within a volume, allowing for direct, high-resolution, three-dimensional dose measurements at arbitrary beam angles, simulating tissue attenuation and scatter for accurate dose verification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If radiochromic film, TLD, or gel-based dosimeters are used for dose verification, then measurement precision is improved, but loss of time increases due to lengthy calibration and data processing
Solution Approach 1:
The patent replaces mechanical/chemical dosimetry systems (radiochromic film, TLD, gel-based dosimeters) with electronic solid-state detectors. This substitution eliminates the need for physical development, scanning, and complex data processing while maintaining dosimetric accuracy, thereby dramatically reducing the time from measurement to result.
2Device complexity
If two-dimensional detector arrays are used, then device complexity is reduced, but measurement precision deteriorates due to low resolution and inability to capture three-dimensional dose distributions
Solution Approach 1:
The patent transitions from two-dimensional detector arrays to a three-dimensional detector configuration where detectors are distributed throughout a volumetric space. This dimensional expansion enables direct measurement of three-dimensional dose distributions without requiring complex mathematical reconstruction, thereby improving measurement precision while keeping the device conceptually simple.
3Ease of manufacture
If two-dimensional detector arrays are used, then manufacturing precision requirements are reduced, but loss of information increases due to compression of three-dimensional data into two dimensions
Solution Approach 1:
By distributing detectors in three-dimensional space rather than compressing them into a two-dimensional plane, the system preserves complete spatial information about dose distributions. This eliminates the need for mathematical techniques to infer three-dimensional data from two-dimensional projections, thereby preventing information loss while maintaining ease of manufacture through standardized detector placement.
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 rapid, accurate, and flexible dose verification with reduced ambiguity, providing direct dose distributions and eliminating the need for complex scatter calculations, thus improving the effectiveness and efficiency of SRS treatment plans.
Implementation Method 1
solid-state electronic radiation detectors... receiving electronic signals from the solid-state electronic radiation detectors indicating radiation dose
Implementation Method 2
allow the dose verification instrument to accurately simulate attenuation and scatter
Implementation Method 3
allow the dose verification instrument to accurately simulate attenuation and scatter
Data Source
AI summary
A volumetric radiation dose detector provides radiation sensors distributed along a closed surface presenting surface normals that vary over a range of azimuth and altitude angles to provide accurate dose modeling for radiation received at a comparable range of angles. Concentric layers of surfaces provide volumetric dose information that can be used to directly produce useful dose maps and assessments.