Radiographic Image Correction Using Marker Magnification
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Solution Overview
Problem
Existing radiography systems struggle to accurately set specific parts of interest in radiographic images to a desired dimension, leading to difficulties in observation due to inconsistent image sizing.
Innovation Solution
An image processing device that acquires radiographic images including markers with radiation attenuation members, calculates a correction magnification based on the sizes of marker images and their actual sizes, and adjusts the image size accordingly to set the part of interest to a specified dimension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the correction magnification is calculated regardless of the part of interest, then the image processing can be simplified, but the part of interest may not have the set dimension in the radiographic image
Solution Approach 1:
The patent segments the image processing into two distinct stages: first calculating a preliminary magnification based on marker images, then calculating a correction magnification specifically for the part of interest. This segmentation allows the system to maintain overall processing simplicity while achieving precise dimension control for specific anatomical regions.
Solution Approach 2:
The patent applies local quality by determining correction magnification specifically for the part of interest rather than uniformly for the entire image. The system identifies the part of interest and applies targeted magnification correction, ensuring that specific anatomical regions achieve the desired set dimension while other areas maintain their original scaling.
2Measurement precision
If markers are disposed at multiple positions between radiation source and subject, and between radiation detector and subject, then the correction magnification calculation becomes more accurate, but the device complexity increases
Solution Approach 1:
The patent uses markers as intermediary objects placed at multiple positions to facilitate accurate magnification calculation. These markers serve as reference points that enable the system to calculate correction magnification by comparing the apparent sizes of markers at different positions, thereby achieving high measurement precision without requiring complex imaging equipment.
Solution Approach 2:
The patent employs multiple marker copies positioned at different locations (between radiation source and subject, and between radiation detector and subject) to enable accurate magnification measurement. By using identical markers at multiple positions, the system can compare their apparent sizes in the radiographic image to determine the correction magnification factor, achieving high accuracy through redundant measurement rather than through complex single-point measurement.
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 precise setting of the part of interest in radiographic images to a desired dimension, improving observation clarity and accuracy in radiography systems.
Implementation Method 1
markers including radiation attenuation members
Data Source
AI summary
An acquisition unit of an image processing device acquires a radiographic image which includes a patient and markers including lead plates and has been captured in a state in which the markers are disposed at a first position between a radiation source and the patient and a second position between a radiation detector and the patient, the subject being interposed between the first and second positions. An image processing unit calculates a correction magnification for setting a part of interest in the patient included in the radiographic image to a set dimension, on the basis of sizes of images of a plurality of the markers included in the radiographic image and an actual size of the markers, and changes a size of the radiographic image according to the correction magnification.