Scattered Ray Estimation in Radiation Moving Image Processing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image processing techniques struggle to effectively reduce the influence of scattered radiation in moving image capturing without grids, leading to decreased diagnostic performance and image quality, especially in applications like CT, dynamic analysis, and tomosynthesis imaging.
Innovation Solution
An image processing apparatus that estimates and subtracts the scattered radiation component from each frame of a moving image by calculating the amount of change between frames, using an amount of change obtaining unit, a scattered ray estimating unit, and a scattered ray reducing unit, to generate a higher quality image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If scattered ray estimation uses the preceding frame result as initial value, then processing speed is improved, but image quality deteriorates when objects move between frames
Solution Approach 1:
The patent dynamically adjusts the initial value selection for scattered ray estimation based on the motion state of the object. When motion is detected between frames, the system switches to using the current frame's raw data as initial value rather than the preceding frame's estimation result, thereby adapting the processing approach to the actual motion conditions and maintaining image quality.
Solution Approach 2:
The patent implements a feedback mechanism by detecting the amount of change between frames and using this information to control the scattered ray estimation process. The change detection result feeds back into the estimation algorithm to determine whether to use previous frame data or current frame data as the initial value, creating a closed-loop system that maintains accuracy under varying motion conditions.
2Object-affected harmful factors
If iterative approximation method is used for scattered ray reduction, then scattered ray influence is reduced, but processing time increases
Solution Approach 1:
The patent performs preliminary change detection between frames before initiating the scattered ray estimation process. By pre-assessing the motion state, the system can determine the appropriate initial value strategy in advance, avoiding unnecessary iterative calculations when motion is present and thus reducing processing time while still achieving scattered ray reduction when conditions are favorable.
Solution Approach 2:
The patent changes the initial value parameter of the iterative approximation algorithm based on detected motion parameters. When the amount of change between frames exceeds a threshold, the system modifies the initial value parameter to use current frame data instead of previous frame data, thereby adjusting the algorithm's behavior to match the motion conditions and optimizing the balance between reduction effectiveness and processing speed.
Data Source
AI summary
An image processing apparatus for processing a moving image obtained by irradiating an object with radiation, includes: an obtaining unit configured to obtain an amount of change between frames in the moving image; an estimating unit configured to estimate, based on the amount of change, a scattered ray component of the radiation scattered by the object in a frame of the moving image; and a scattered ray reducing unit configured to generate an image by subtracting the scattered ray component from the frame of the moving image.