Radiation Image Processing With Pixel Correction for Composite Imaging
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Solution Overview
Problem
Existing methods for generating composite radiation images by changing the emission direction of a radiation source in the body axis direction require multiple exposures, which can adversely affect the subject's health, and do not provide a specific method for correcting pixel values, leading to density saturation and difficulty in interpreting the images.
Innovation Solution
A radiation image processing apparatus and method that captures radiation images under different imaging conditions, corrects pixel values to ensure they are equal to or less than the maximum gradation value, and combines these images to generate a composite image that suppresses density saturation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If multiple radiation exposures are performed to capture images from different emission directions, then comprehensive imaging information can be obtained, but the subject's radiation exposure increases causing adverse health effects
Solution Approach 1:
The system performs preliminary actions by capturing multiple radiation images under different imaging conditions before final processing. These preliminary images are then processed and combined to create a composite image that provides comprehensive imaging information while the patent seeks to minimize the number of exposures needed through intelligent image processing and combination techniques
2Ease of manufacture
If pixel values are not corrected during image combination, then the processing procedure remains simple, but density saturation occurs making the image difficult to interpret
Solution Approach 1:
The system changes the parameter of pixel values by correcting them before image combination. The image processing apparatus adjusts pixel values to prevent density saturation while maintaining processing feasibility through automated correction algorithms that handle the transformation of image data parameters
Data Source
AI summary
A radiation image processing apparatus includes a hardware processor that obtains radiation images of a subject captured under imaging conditions different from one another, and an image processor that corrects a pixel value of at least one radiation image of the radiation images, and combines the radiation images to obtain one composite image. Each of the radiation images has an image overlap area with one or more other radiation images of the radiation images. The image processor corrects the pixel value of the at least one radiation image such that a maximum value of the pixel value of the at least one radiation image is equal to or smaller than a maximum value of an image gradation.