Silicon Strip Sensor Arrays for Nuclear Medicine Imaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current nuclear medicine imaging systems face challenges in achieving high detection efficiency and spatial resolution for gamma photons, particularly due to the low probability of photoelectric absorption in silicon materials and high leakage current issues in long strip silicon sensors, which limit their effectiveness in clinical applications.
Innovation Solution
A novel detector configuration using silicon strip sensor arrays optically coupled with a scintillator, where the arrays are oriented orthogonally to determine gamma interaction locations in x-y coordinates, and employing Geiger mode avalanche amplification for low noise, allowing for three-dimensional interaction positioning with fewer electronic channels and reduced costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If silicon strip sensors are used for gamma photon detection, then spatial resolution and detection efficiency are improved, but photoelectric absorption probability remains low
Solution Approach 1:
The patent combines silicon strip sensors with a scintillator material to create a composite detector system. The scintillator converts gamma photons to visible light, which is then detected by the silicon strip sensors, thereby improving photoelectric absorption probability while maintaining the spatial resolution benefits of silicon sensors.
Solution Approach 2:
The scintillator acts as an intermediary between gamma photons and silicon strip sensors. It mediates the interaction by converting high-energy gamma photons into lower-energy visible photons that silicon sensors can detect more efficiently, thus resolving the low absorption probability issue.
2Device complexity
If long strip silicon sensors are used to reduce electronic channels, then device complexity is reduced, but leakage current increases
Solution Approach 1:
The patent segments the long strip silicon sensors into smaller sub-strips or groups, allowing for shorter sensor elements that generate less leakage current. The segmentation maintains the reduced electronic channel advantage while mitigating the leakage current problem through modular design.
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 configuration enhances detection efficiency and spatial resolution, achieving improved imaging performance with reduced noise and costs, enabling effective gamma ray interaction positioning in nuclear medicine applications.
Implementation Method 1
a scintillator, with which the photons interact to produce flashes of light or 'events'
Implementation Method 2
These events can be detected by, e.g., an array of photo-detectors
Implementation Method 3
employing Geiger mode avalanche amplification for low noise
Data Source
AI summary
A nuclear medicine imaging system is disclosed that includes a detector including a plurality of silicon strip sensor arrays surrounding a scintillator. In some embodiments, strip detectors can be provided that can lead to significant cost benefits as compared to existing detectors, such as existing nuclear detectors. The preferred embodiments may be applied in nuclear medical cameras, while other embodiments may be applied in other radiation applications, whether medical or non-medical applications.