CT System Parameter Determination Using Scanning Table
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Solution Overview
Problem
The manufacturing process of customized mould bodies for determining CT system parameters is complicated due to high machining accuracy requirements, leading to complex structures and potential errors in parameter determination.
Innovation Solution
A method and device that utilize a mould body with a first plane and a second plane perpendicular to each other, allowing the mould body to move between the X-ray source and detector, acquiring X-ray projections to determine the coordinates of the foot of the perpendicular of the X-ray source's focus, thereby simplifying the structure and manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a customized mould body with fine-structure is used to determine CT system parameter, then the measurement precision is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent extracts the essential functional elements from the complex customized mould body and relocates them to the scanning table. Instead of using a specialized mould body with fine-structure, the solution uses the existing scanning table structure that already performs the scanning function, thereby simplifying the overall system while maintaining measurement precision.
Solution Approach 2:
The scanning table is given multiple functions: it serves both as the scanning platform and as the mould body for parameter determination. By making the scanning table multi-functional, the patent eliminates the need for a separate customized mould body, reducing device complexity while maintaining the required measurement accuracy.
2Measurement precision
If a customized mould body with fine-structure is used to determine CT system parameter, then the measurement precision is improved, but the ease of manufacture deteriorates
Solution Approach 1:
The patent extracts the essential functional elements from the complex customized mould body and relocates them to the scanning table. Instead of using a specialized mould body with fine-structure, the solution uses the existing scanning table structure that already performs the scanning function, thereby simplifying the overall system while maintaining measurement precision.
Solution Approach 2:
The scanning table is given multiple functions: it serves both as the scanning platform and as the mould body for parameter determination. By making the scanning table multi-functional, the patent eliminates the need for a separate customized mould body, reducing device complexity while maintaining the required measurement accuracy.
3Measurement precision
If a customized mould body with fine-structure is used to determine CT system parameter, then the measurement precision is improved, but the manufacturing cost increases
Solution Approach 1:
The patent extracts the essential functional elements from the complex customized mould body and relocates them to the scanning table. Instead of using a specialized mould body with fine-structure, the solution uses the existing scanning table structure that already performs the scanning function, thereby simplifying the overall system while maintaining measurement precision.
Solution Approach 2:
The scanning table is given multiple functions: it serves both as the scanning platform and as the mould body for parameter determination. By making the scanning table multi-functional, the patent eliminates the need for a separate customized mould body, reducing device complexity while maintaining the required measurement accuracy.
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 simplifies the manufacturing process and improves the accuracy of CT system parameter determination by using intrinsic components like scanning tables or light-limiting doors as mould bodies, reducing manufacturing costs and errors.
Implementation Method 1
The CT system includes: an X-ray source and a detector. Controlling a mould body to move between the X-ray source and a detection surface of the detector, and acquiring X-ray projections of the mould body during movement
Data Source
AI summary
A method for determining a CT system parameter: controlling a mould body to move between an X-ray source and a detection surface of a detector, and acquiring X-ray projections of the mould body during movement on the detection surface, wherein the mould body has a first plane and a second plane perpendicular to each other, and the first plane and the second plane are always perpendicular to the detection surface during the movement of the mould body; determining a first straight line and a second straight line according to the acquired X-ray projections; and determining an intersection point of the first straight line and the second straight line as a pedal coordinate of a focus of the X-ray source on the detection surface, a CT coordinate system parameter including the coordinates of the foot of the perpendicular.