Scattered X-ray Detection for Functional Tissue Imaging
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Solution Overview
Problem
Current x-ray medical imaging techniques, such as CT, do not effectively utilize secondary x-ray beams like scattered x-rays, which may contain valuable imaging data.
Innovation Solution
An apparatus and method that includes an x-ray source, a device with an array of openings, and a detector aligned at an angle less than 180 degrees relative to the x-ray beam path to capture and analyze secondary x-ray beams generated by interactions with a target, allowing for the measurement of spatial, temporal, and functional attributes of tissues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If traditional direct x-ray transmission methods are used, then the imaging system is simple and well-established, but valuable imaging data from secondary x-ray beams is lost
Solution Approach 1:
The patent converts scattered x-rays, which were previously considered harmful noise to be rejected, into useful imaging information. By detecting scattered x-rays at angles less than 180 degrees and analyzing their energy spectra (identifying k-alpha peaks, k-beta peaks, and Compton scatter peaks), the system transforms this previously discarded data into valuable functional and physical imaging information about tissue characteristics.
Solution Approach 2:
The patent adds a new detection dimension by measuring scattered x-rays at angles less than 180 degrees relative to the beam path, rather than only detecting transmitted x-rays in the forward direction. This angular dimension enables access to secondary x-ray beams that contain additional imaging data about tissue properties, electron density, and functional attributes.
2Measurement precision
If scattered x-ray beams are detected at angles less than 180 degrees, then comprehensive tissue information is obtained, but the detector placement and data processing become more complex
Solution Approach 1:
The patent segments the detection process into distinct components: (1) detecting scattered x-rays at specific angles, (2) analyzing energy spectra to identify characteristic peaks (k-alpha, k-beta, Compton scatter), and (3) processing the spectral data to determine tissue properties. This segmentation allows complex analysis to be broken down into manageable steps, improving measurement precision while maintaining system manageability.
Solution Approach 2:
The patent utilizes changes in x-ray energy parameters by detecting and analyzing the energy spectra of scattered x-rays. By identifying specific energy peaks (k-alpha at 28.7-32.4 keV for iodine, Compton scatter peaks), the system extracts quantitative information about tissue composition and density, transforming angular detection data into meaningful physical measurements.
3Loss of information
If multiple detector elements are used to capture different parts of the target, then spatial distribution information is improved, but the system complexity and data processing requirements increase
Solution Approach 1:
The patent employs multiple detector elements arranged to capture scattered x-rays from different spatial locations of the target. Each detector element or detector group is associated with a specific region of interest, allowing the system to reconstruct spatial distribution maps of tissue properties. The segmentation of detection and processing enables parallel analysis of multiple spatial regions simultaneously.
Solution Approach 2:
The patent designs the detector system to serve multiple functions: detecting scattered x-rays, measuring energy spectra, identifying tissue characteristics, and mapping spatial distribution. The same detection infrastructure (detector array with openings) supports both functional imaging (tissue property measurement) and physical imaging (spatial distribution), eliminating the need for separate specialized systems.
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 approach enhances the imaging data acquisition by utilizing scattered x-rays, providing more comprehensive and detailed information about tissue characteristics, including spatial distribution, temporal changes, and functional attributes, beyond what is achievable with traditional direct x-ray transmission methods.
Implementation Method 1
a second x-ray beam resulted from an interaction between the first x-ray beam and the target
Implementation Method 2
a detector aligned with the device, the detector located at an angle less than 180 degrees relative to the beam path of the first x-ray beam to receive a part of the second x-ray beam from the device
Data Source
AI summary
An apparatus to examine a target in a patient includes an x-ray source configured to deliver a first x-ray beam towards the target, a device having an array of openings, the device located at an angle less than 180 degrees relative to a beam path of the first x-ray beam to receive a second x-ray beam resulted from an interaction between the first x-ray beam and the target, and a detector aligned with the device, the detector located at an angle less than 180 degrees relative to the beam path of the first x-ray beam to receive a part of the second x-ray beam from the device that exits through the openings at the device.