X-ray CT Rotary Unit Variable Distance Imaging
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Solution Overview
Problem
Existing X-ray CT devices face a challenge in improving image quality while minimizing patient exposure dose, as increasing the X-ray irradiation dose to enhance image quality also increases patient exposure, and reducing the dose compromises image quality.
Innovation Solution
The X-ray CT device features a rotary unit that supports the X-ray source and detector, allowing variable distances between these components and a reference position, enabling the X-ray source to irradiate with a conical beam and the detector to switch between states to optimize image capture, thereby improving image quality without increasing patient exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the X-ray irradiation dose is increased to enhance image quality, then image quality is improved, but patient exposure dose increases
Solution Approach 1:
The patent implements variable distances between the X-ray source/detector and the patient by making the rotary unit movable along the rotation axis. This dynamic adjustment allows optimization of the imaging geometry for different patient sizes and imaging requirements, improving image quality without necessarily increasing the X-ray dose.
Solution Approach 2:
The patent changes the geometric parameters of the imaging system by allowing the X-ray source and detector to be positioned at variable distances from the patient. This parameter adjustment optimizes the balance between image quality and radiation dose, enabling high-quality imaging at lower doses through improved spatial resolution and reduced scatter.
2Measurement precision
If the distance between X-ray source and patient is reduced to improve image quality, then image quality improves, but scattered rays increase
Solution Approach 1:
The movable rotary unit allows dynamic adjustment of the source-to-patient distance, enabling optimization of the imaging geometry. By adjusting this distance based on specific imaging requirements and patient anatomy, the system can improve image quality while managing scattered radiation through optimal positioning rather than fixed close proximity.
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 configuration enhances image quality by adjusting the X-ray source and detector positions to minimize exposure dose, ensuring better alignment and reduced scattered rays, thus achieving improved image quality without increasing the patient's X-ray exposure.
Implementation Method 1
an X-ray source that irradiates an object to be imaged with an X-ray
Implementation Method 2
an X-ray detector that detects the X-ray having passed through the object to be imaged
Data Source
AI summary
An X-ray CT device includes: an X-ray source that irradiates an object to be imaged with an X-ray; an X-ray detector that is disposed on one side opposite to the X-ray source with a position, at which the object to be imaged is to be disposed, interposed therebetween and detects the X-ray having passed through the object to be imaged; and a rotary unit that supports the X-ray source and the X-ray detector and rotates the X-ray source and the X-ray detector together around the object to be imaged. A distance between the X-ray source and a predetermined reference position positioned in the object to be imaged is variable, and a distance between the reference position and the X-ray detector is variable.