Photon-Counting Dental Imaging for Material Differentiation
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Solution Overview
Problem
Conventional CT imaging systems face challenges in distinguishing between different materials based on attenuation coefficients, require multiple exposures leading to increased radiation dosage, and have limitations in equipment positioning and patient comfort.
Innovation Solution
The implementation of photon-counting detectors in dental imaging apparatus, allowing for reduced exposure levels and improved material differentiation through multi-spectral imaging, combined with flexible detector positioning for various imaging modalities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional CT imaging systems use multiple exposures to distinguish materials, then material differentiation is improved, but radiation dosage increases
Solution Approach 1:
The patent uses photon-counting detectors that count individual photons and can differentiate materials based on their energy spectra. By analyzing the distribution of photon counts across different energy levels, the system achieves material differentiation without requiring multiple exposures, thus reducing radiation dosage while maintaining measurement precision.
2Device complexity
If a single detector is used for both CT and panoramic imaging, then device complexity is reduced, but detector performance for both functions deteriorates
Solution Approach 1:
The patent employs a photon-counting detector with energy spectral analysis capability that can perform both CT and panoramic imaging functions with high quality. The detector's ability to count photons and analyze energy spectra allows it to satisfy the performance requirements of both imaging modalities simultaneously, eliminating the need for separate detectors while maintaining imaging quality.
3Measurement precision
If conventional detectors are used, then equipment cost is reduced, but ability to distinguish materials by attenuation coefficient deteriorates
Solution Approach 1:
The patent transitions from conventional integrating detectors to photon-counting detectors that provide spectral information. This technological advancement enables material distinction based on attenuation coefficients by analyzing photon energy spectra, significantly improving measurement precision while accepting increased device complexity as a necessary trade-off for enhanced diagnostic capability.
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 efficient imaging with reduced radiation exposure, enhanced material differentiation, and improved patient comfort by utilizing photon-counting detectors and adaptable detector configurations.
Implementation Method 1
a first digital imaging sensor that provides, for each of a plurality of image pixels, at least a first digital value according to a count of received photons
Data Source
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AI summary
An extra-oral dental imaging apparatus for obtaining an image from a patient has a radiation source; a first digital imaging sensor that provides, for each of a plurality of image pixels, at least a first digital value according to a count of received photons that exceed at least a first energy threshold; a mount that supports the radiation source and the first digital imaging sensor on opposite sides of the patient' s head; a computer in signal communication with the digital imaging sensor for acquiring a first two-dimensional image from the first digital imaging sensor; and a second digital imaging sensor that is alternately switched into place by the mount and that provides image data according to received radiation.