Staggered CT Collimator Surfaces for Compact X-Ray Projection
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Solution Overview
Problem
Current CT machines face limited space due to the arc-shaped collimator configuration, which occupies excessive space in the Y-axis direction, affecting the internal layout and efficiency.
Innovation Solution
A collimator with a staggered arrangement of collimating surfaces, where the first collimating surface has a greater curvature than the second, allowing a compact structure that reduces space occupation while maintaining effective X-ray projection and imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the collimator is configured with an arc-shaped structure to enable a rectangular projection shape of X-rays onto the detector, then the imaging quality is improved, but the collimator occupies excessive space in the Y-axis direction
Solution Approach 1:
The collimator is divided into multiple collimating sections (first collimating section, second collimating section, etc.) with different curvatures. Each section handles a specific angular range of X-rays, allowing the overall collimator to achieve rectangular projection without requiring a single large arc-shaped structure, thus reducing Y-axis space occupation.
Solution Approach 2:
Different collimating sections are assigned different curvature values tailored to their specific functional requirements. The first collimating section has a first curvature value optimized for its angular range, while the second collimating section has a second curvature value optimized for its range. This local optimization allows each section to be more compact while collectively achieving the desired rectangular projection shape.
Data Source
Figure 1~2
Figure 3
AI summary
Provided are a collimator and a CT machine. The collimator comprises a collimator main body (100), wherein the collimator main body (100) has a first collimating surface (131) facing or facing away from an X-ray tube, and a second collimating surface (141) facing or facing away from the X-ray tube; the curvature of the first collimating surface (131) is greater than that of the second collimating surface (141); the first collimating surface (131) and the second collimating surface (141) are arranged in a staggered manner; and a ray channel (150) penetrating the collimator is formed in the collimator main body (100), and the ray channel (150) is distributed in the first collimating surface (131) and the second collimating surface (141).