Hybrid X-ray Detector Cell for Simultaneous Count and Energy Data
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Solution Overview
Problem
Current CT systems face challenges in effectively collecting x-ray count data and energy charge data simultaneously due to high flux rates, which limit energy discrimination and tissue differentiation applications.
Innovation Solution
The development of an x-ray detector with a hybrid cell design that allows for simultaneous collection of both x-ray count and energy charge data using a silicon wafer, where one portion operates in integrating mode and the other in counting mode, enabling adaptive binning at low flux rates and energy integration at high flux rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a single cell operates in signal integration mode, then energy charge data can be collected, but x-ray count data cannot be collected simultaneously
Solution Approach 1:
The detector cell is divided into two distinct portions: a first portion with a first photosensor that collects x-ray count data, and a second portion with a second photosensor that collects energy charge data. This segmentation allows simultaneous collection of both data types without requiring complex additional components.
Solution Approach 2:
The detector cell is designed to perform multiple functions simultaneously - it can collect both x-ray count data and energy charge data using the same basic cell structure and readout electronics, making the detector versatile for different imaging applications and flux rate conditions.
2Productivity
If x-ray counting is used at high flux rates, then count data can be collected, but energy discrimination capability is limited
Solution Approach 1:
The system dynamically adapts its operation mode based on flux rate conditions. At low flux rates, the counting portion provides accurate count data, while at high flux rates, the integration portion provides energy charge data for energy discrimination. This dynamic switching optimizes performance across varying operational conditions.
Solution Approach 2:
The detector changes its measurement parameters based on operating conditions - switching between counting mode and integration mode depending on the x-ray flux rate. This allows the system to maintain measurement precision across a wide range of flux rates by selecting the appropriate measurement mode.
3Loss of information
If separate detector cells are used for counting and integration, then both data types can be collected, but device complexity increases
Solution Approach 1:
The patent merges the counting and integration functions into a single hybrid detector cell structure. Both the first photosensor for counting and the second photosensor for integration are integrated within the same cell, sharing common support structures and readout electronics, thereby reducing overall device complexity while maintaining full functionality.
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 operation in high flux rate environments, allowing for energy discrimination and tissue differentiation, with the flexibility to choose between data types on a view-by-view basis during reconstruction, enhancing imaging capabilities.
Implementation Method 1
a first portion of which includes a first silicon detector cell that collects first x-ray data in response to incident x-rays
Data Source
AI summary
A method includes simultaneously collecting both x-ray count data and energy charge data from a single cell.