Collimator Aperture Width Adjustment in Radiation Tomography
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Solution Overview
Problem
Existing radiation tomography methods that improve spatial resolution require complex and costly mechanisms for attaching and detaching collimator diaphragms, which are not suitable for frequent switching and compromise radiation use efficiency.
Innovation Solution
A radiation tomography system with an aperture-width changing unit that moves radiation absorbing members to adjust the width of collimator plate apertures, allowing for simple and efficient switching of spatial resolution by linearly moving these members between covered and exposed positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a diaphragm is attached to cover edge portions of detecting elements to improve spatial resolution, then spatial resolution is improved, but radiation use efficiency decreases and the attach/detach mechanism becomes large-scale and complicated
Solution Approach 1:
The invention divides the aperture width adjustment function into multiple radiation absorbing members (first and second members) that can independently move along the channel direction. Each member controls a portion of the aperture width, allowing segmented adjustment of the radiation beam path. This segmentation enables simple linear movement to achieve spatial resolution switching without complex mechanisms.
Solution Approach 2:
The invention makes the aperture width dynamically adjustable by moving the radiation absorbing members along the channel direction. The aperture width changing unit enables continuous or discrete adjustment of the aperture width by controlling the position of these members, transforming a static aperture into a dynamic one that can adapt to different imaging requirements.
2Measurement precision
If a diaphragm is attached to cover edge portions of detecting elements to improve spatial resolution, then spatial resolution is improved, but the mechanism requires large space and high cost
Solution Approach 1:
The invention divides the aperture width adjustment function into multiple radiation absorbing members (first and second members) that can independently move along the channel direction. Each member controls a portion of the aperture width, allowing segmented adjustment of the radiation beam path. This segmentation enables simple linear movement to achieve spatial resolution switching without complex mechanisms.
Solution Approach 2:
The invention changes the aperture width parameter by moving the radiation absorbing members along the channel direction. By controlling the position of these members, the system can adjust the aperture width to different values, enabling spatial resolution switching through parameter change rather than mechanical reconfiguration.
3Measurement precision
If the aperture width is reduced to improve spatial resolution, then spatial resolution is improved, but radiation use efficiency decreases
Solution Approach 1:
The invention makes the aperture width dynamically adjustable by moving the radiation absorbing members along the channel direction. The aperture width changing unit enables continuous or discrete adjustment of the aperture width by controlling the position of these members, transforming a static aperture into a dynamic one that can adapt to different imaging requirements.
Solution Approach 2:
The invention changes the aperture width parameter by moving the radiation absorbing members along the channel direction. By controlling the position of these members, the system can adjust the aperture width to different values, enabling spatial resolution switching through parameter change rather than mechanical reconfiguration.
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 flexible switching of spatial resolution with a simple structure, reducing costs and complexity while maintaining radiation use efficiency, allowing for high-resolution imaging without excessive radiation exposure.
Implementation Method 1
an aperture-width changing unit which changes a width of each aperture formed by the plurality of collimator plates by moving a plurality of radiation absorbing members
Data Source
AI summary
A radiation tomography system is provided. The radiation tomography system includes a radiation source configured to rotate around a subject and apply radiation to the subject, a plurality of radiation detecting elements disposed opposite the radiation source, a plurality of collimator plates partitioning the radiation detecting elements in a channel direction, the collimator plates erected such that plate surfaces of each of the plurality of collimator plates extend along a direction of radiation from the radiation source, and an aperture-width changing unit configured to change a width of each aperture formed by the plurality of collimator plates by moving a plurality of radiation absorbing members along respective end sides of the collimator plates close to the radiation source, the plurality of radiation absorbing members moveable between a first position at which the end sides are covered and a second position at which the end sides are exposed.