Proton Imaging With Fiber Tracking for Position and Range Resolution
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Solution Overview
Problem
Conventional proton radiography systems are bulky, expensive, and suffer from poor proton transverse position and residual range resolution, which affects the accuracy of treatment planning in proton therapy.
Innovation Solution
A medical imaging system utilizing a fiber bundling architecture for tracking detectors and a light collection architecture for residual range detectors, which improves proton transverse position resolution to 0.3 mm and residual range resolution to 3.0 mm, respectively, by reducing complexity and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional proton radiography systems are used, then the system can perform basic imaging, but the system becomes bulky, expensive, and suffers from poor resolution
Solution Approach 1:
The tracking detector is segmented into multiple layers with scintillating fibers arranged in a grid pattern, allowing precise position measurement through light detection at specific fiber intersections. This segmentation enables high resolution without requiring a monolithic complex detector structure.
Solution Approach 2:
Scintillating fibers serve as an intermediary medium that converts proton interaction positions into detectable light signals. The fibers transmit light from the interaction point to photodetectors, enabling precise position measurement while simplifying the overall detector architecture compared to direct detection methods.
2Measurement precision
If conventional tracking detectors are used, then the system can detect proton positions, but the transverse position resolution deteriorates
Solution Approach 1:
Different regions of the detector have optimized fiber densities and arrangements tailored to specific measurement requirements. The scintillating fibers are configured with varying dimensions and spacing to enhance position resolution in different transverse directions, achieving locally optimized measurement precision throughout the detection area.
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 system achieves enhanced proton transverse position and residual range resolution, enabling precise treatment planning and reducing uncertainties in proton therapy, thereby improving patient alignment and treatment efficacy.
Implementation Method 1
the first tracking detector includes first scintillating fibers
Implementation Method 2
the residual range detector includes at least one photon detector
Data Source
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AI summary
A method for operating a medical imaging system, comprises: generating a beam of particles; steering the beam of particles through a first tracking detector, an object, a second tracking detector and into a residual range detector; collecting tracking data from a first light detector, wherein the first light detector is coupled to the terminal ends of the bundled first scintillating fibers of the first tracking detector, collecting tracking data from a second light detector, wherein the second light detector is coupled to the second tracking detector, wherein the tracking data from the first light detector and the tracking data from the second light detector represent a trajectory of the beam of particles through the first tracking detector and through the second tracking detector; collecting energy data from the at least one photon detector, wherein the energy data represents energy loss of the beam of particles traversed through the object; and generating an image of the object based on the tracking data and the energy data.