Divergent Sensor Array for High-Speed Gamma Imaging
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Solution Overview
Problem
Current gamma radiation imaging devices are slow and inefficient due to the use of collimators, which restricts their application in acquiring images of extensive gamma fields in open spaces, requiring long measurement times and resulting in blurry images with low spatial resolution.
Innovation Solution
A gamma camera device comprising an array of neighboring sensors with divergent detection lobes, each efficiently detecting incident radiation within a specific lobe, minimizing overlapping and using shielding to reduce interference from neighboring lobes, allowing for quick and efficient image acquisition of gamma fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If collimators are used to create gamma images, then spatial resolution is improved, but detection efficiency deteriorates and measurement time increases
Solution Approach 1:
The device divides the detection system into multiple independent sensors arranged in an array, each sensor detecting radiation from a specific direction within its own detection lobe. This segmentation allows simultaneous detection from multiple angles without requiring a single complex collimator, thereby improving both spatial resolution and detection efficiency.
Solution Approach 2:
The invention transitions from traditional 2D planar detection to 3D volumetric detection by arranging sensors in a three-dimensional array with detection lobes extending in multiple directions. This dimensional expansion enables the system to capture gamma radiation from various spatial angles simultaneously, resolving the trade-off between resolution and efficiency.
2Measurement precision
If collimators are used to create gamma images, then spatial resolution is improved, but measurement time increases significantly
Solution Approach 1:
The array of sensors with divergent detection lobes enables continuous simultaneous detection from multiple directions throughout the field of view. Unlike sequential scanning methods or single-point detection, all sensors operate concurrently to build the complete image, dramatically reducing measurement time while maintaining spatial resolution.
3Productivity
If detection lobes overlap extensively, then detection efficiency improves, but image quality deteriorates due to interference
Solution Approach 1:
Each sensor in the array is designed with a specific detection lobe orientation and shielding configuration tailored to its position. The shielding structures are locally optimized to block radiation from adjacent lobes while preserving sensitivity in the intended detection direction. This local quality control allows overlapping lobes to coexist without significant interference, maintaining both efficiency and image quality.
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 high-efficiency gamma imaging within short periods, providing clear and detailed images of gamma fields, suitable for real-time monitoring and spectrometry, while being compact, lightweight, and cost-competitive with existing area monitors and geophysical detectors.
Implementation Method 1
The first detector performs Compton interaction
Implementation Method 2
the second works as a detector of the absorption of the outgoing gamma after Compton interaction
Implementation Method 3
using shielding to reduce interference from neighboring lobes
Data Source
AI summary
This invention presents a new device to produce images of the gamma field, specially designed for circumstances requiring high efficiency and fast response imaging, by applying the concept of image extraction within a given field of view, through the combination of efficient gamma radiation detectors. Each detector is located inside a shielding, with an area of the detector with no shielding to enter the incident gamma radiation detector with a plurality of angles in relation to the normal outgoing central axis to the surface of the detector through the unshielded area, where that central axis is divergent in relation to the outgoing central axes of neighboring detectors.