Direct Conversion X-ray Detector for Non-invasive Blood Sugar Measurement
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Solution Overview
Problem
Current X-ray detectors face challenges in efficiently determining blood sugar levels non-invasively and accurately, particularly due to cumbersome heat management issues in semiconductor detectors and reduced spatial resolution in scintillators, which hinder the production of large-area detectors with high pixel density.
Innovation Solution
An X-ray detection apparatus utilizing a semiconductor X-ray detector without a scintillator, comprising an X-ray absorption layer with diodes or resistive materials, and an electronic system for processing signals to determine blood sugar levels by measuring X-ray attenuation and temporal changes, using a clamp to maintain consistent tissue thickness and an X-ray source with filtered photon energies between 6 keV to 10 keV.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If scintillators are used to convert radiation to visible light, then radiation detection is achieved, but spatial resolution is reduced due to light spreading and scattering
Solution Approach 1:
The patent removes the scintillator component from the detection system entirely, using direct conversion detectors that convert radiation directly to electrical signals without intermediate light conversion. This eliminates the light spreading and scattering problem that degrades spatial resolution while maintaining absorption efficiency through optimized detector materials and geometry.
Solution Approach 2:
The patent replaces the mechanical/optical system of scintillators (which require light conversion and transmission through material) with a direct electrical conversion system. This substitution eliminates the physical mechanisms (light emission, propagation, and detection) that cause spatial resolution degradation while achieving comparable or superior absorption efficiency.
2Reliability
If scintillator thickness is increased to improve radiation absorption, then absorption efficiency increases, but spatial resolution decreases due to increased light spreading
Solution Approach 1:
By removing the scintillator entirely and using direct conversion detectors, the patent eliminates the fundamental trade-off between thickness and resolution. The detection process occurs directly at the point of radiation interaction without light propagation, allowing thin detector layers to achieve high absorption efficiency without the light spreading that plagues scintillator-based systems.
3Measurement precision
If semiconductor X-ray detectors with large area and high pixel density are produced, then detection capability improves, but heat management becomes difficult or impossible
Solution Approach 1:
The patent replaces semiconductor detectors with direct conversion detectors that generate fewer heat photons per unit of detected energy. This substitution fundamentally changes the heat generation mechanism, allowing large-area, high-pixel-density detectors to operate without the severe thermal management challenges that limit semiconductor detector scalability.
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 accurate and non-invasive determination of blood sugar levels by effectively capturing and processing X-ray attenuation and temporal changes, overcoming heat management and spatial resolution limitations, thus providing reliable imaging and measurement capabilities.
Implementation Method 1
Semiconductor X-ray detectors largely overcome this problem by direct conversion of radiation into electric signals. A semiconductor X-ray detector may include a semiconductor layer that absorbs radiation in wavelengths of interest. When a radiation particle is absorbed in the semiconductor layer, multiple charge carriers (e.g., electrons and holes) are generated
Implementation Method 2
the apparatus further comprises a clamp comprising a first arm and a second arm and configured to compress the human tissue between the first arm and the second arm
Implementation Method 3
an X-ray source configured to direct X-rays through a human tissue
Implementation Method 4
an X-ray detector configured to capture an image of the human tissue with the X-rays
Implementation Method 5
the apparatus further comprises a filter configured to prevent a portion of the X-rays that has photon energies outside a predetermined range from reaching the human tissue
Data Source
AI summary
Disclosed herein is an apparatus comprising: an X-ray source configured to direct X-rays through a human tissue; an X-ray detector configured to capture an image of the human tissue with the X-rays; wherein the apparatus is configured to identify an image of a blood vessel from the image of the human tissue and configured to determine a blood sugar level based on the image of the blood vessel.