X-ray CT scatter diagram weighting for tissue resolution
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Solution Overview
Problem
Conventional X-ray CT systems face challenges in enhancing tissue resolution and contrast in images obtained without contrast agents, particularly in distinguishing between tissues with similar CT values, such as soft tissues like the brain, tumor, and muscle.
Innovation Solution
The X-ray CT apparatus generates a scatter diagram representing the contained amount of reference materials at each position, sets weights based on distances from the center of gravity, and adjusts pixel values to enhance contrast and improve tissue resolution, allowing for the generation of analysis images that resemble MRI images with increased tissue differentiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dual-energy acquisition is performed to enhance tissue differentiation, then tissue resolution is improved, but device complexity and processing time increase
Solution Approach 1:
The patent segments the tissue analysis process by creating a scatter diagram that separates tissues based on their material composition characteristics. The processing circuitry divides the complex dual-energy data into manageable components by plotting scatter points representing different tissue types, allowing systematic weight assignment and analysis without requiring complex additional hardware
Solution Approach 2:
The patent transforms the dual-energy data from a two-dimensional parameter space into a three-dimensional scatter diagram space by adding the weight parameter dimension. This dimensional transformation allows tissues with similar CT values to be differentiated by their position in the scatter diagram, enabling enhanced tissue resolution through computational rather than hardware complexity
2Measurement precision
If scatter diagram analysis with weighting is applied to enhance tissue contrast, then tissue differentiation is improved, but image processing time increases
Solution Approach 1:
The patent performs preliminary actions by pre-calculating the scatter diagram and assigning weights to different scatter points before generating the final analysis image. The processing circuitry prepares the weight values based on the scatter diagram structure in advance, which streamlines the subsequent image generation process and reduces overall processing time
Solution Approach 2:
The patent changes parameters by assigning different weights to scatter points based on their position and density in the scatter diagram. This parameter transformation converts the raw dual-energy data into weighted values that enhance tissue differentiation, achieving improved tissue resolution through efficient computational parameter adjustment rather than time-consuming iterative processing
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 effectively enhances tissue contrast and resolution in CT images, enabling better differentiation between tissues even without contrast agents, similar to MRI images, by weighting pixel values based on the scatter diagram analysis.
Implementation Method 1
processing circuitry to acquire a first data set corresponding to first X-ray energy and a second data set corresponding to second X-ray energy different from the first X-ray energy
Data Source
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AI summary
An X-ray CT apparatus (1) according to an embodiment includes a scan unit (441) and an analysis unit (444). The scan unit (441) acquires a first data set corresponding to first X-ray energy and a second data set corresponding to second X-ray energy different from the first X-ray energy, with respect to a region including a part of a subject by performing scanning using X-rays. The analysis unit (444) generates a scatter diagram representing a contained amount of each of reference materials at each of positions in the region on the basis of the first data set and the second data set. The analysis unit (444) sets weights for at least a part of the scatter diagram. The analysis unit (444) generates an analysis image based on the contained amounts and the weights.