CT Phantom Flat-Ring Base Strength
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Solution Overview
Problem
Existing CT-device evaluation phantoms face challenges in maintaining mechanical strength and ease of creation, especially when designed for small specimens, as they require thin and fragile supporting rods that are difficult to assemble and prone to damage.
Innovation Solution
A CT-device evaluation phantom with a flat-ring shaped supporting base and multiple absorbing objects placed directly on it, eliminating the need for thin supporting rods and allowing for easier assembly and increased mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If thin supporting rods are used to create a small evaluation phantom for zoomed-in images, then the phantom size is reduced, but the mechanical strength deteriorates and the rods become fragile and easy to damage
Solution Approach 1:
The invention removes the thin supporting rods from the evaluation phantom structure and replaces them with a flat-ring shaped supporting base. This extraction of the problematic component (thin rods) eliminates the fragility issue while maintaining the ability to support absorbing objects at various heights through the ring structure's geometric design.
Solution Approach 2:
The invention transitions from a vertical rod-based support structure to a flat-ring base structure that utilizes two-dimensional plane geometry. The flat-ring base provides a stable, distributed support foundation that maintains mechanical strength while accommodating small absorbing objects, effectively replacing the one-dimensional rod support with a two-dimensional structural platform.
2Volume of moving object
If thin supporting rods are used in small evaluation phantoms, then the phantom can be made small for zoomed-in imaging, but the ease of manufacture deteriorates due to difficult assembly
Solution Approach 1:
By removing the thin supporting rods from the structure, the invention eliminates the complex assembly steps required to attach rods and secure absorbing objects to them. The flat-ring base provides a simplified foundation where absorbing objects can be directly placed, significantly improving ease of manufacture and assembly.
Solution Approach 2:
The invention segments the support function from the absorbing object placement function. The flat-ring base provides a stable, pre-formed support structure, while absorbing objects are independently placed on the base. This segmentation allows for easier manufacturing of individual components and simplifies the overall assembly process compared to integrating rods with object attachment mechanisms.
3Volume of moving object
If absorbing objects are fixed to thin supporting rods, then the phantom can achieve compact size, but the reliability deteriorates due to high risk of damage
Solution Approach 1:
The invention extracts the thin supporting rods that create reliability issues and replaces them with a robust flat-ring base structure. This removal of the fragile rod component eliminates the high risk of damage while maintaining the compact phantom size needed for zoomed-in imaging of small specimens.
Solution Approach 2:
The invention transitions from a vertical rod-based support system to a two-dimensional flat-ring base system. This dimensional change provides a more stable and damage-resistant support structure that reliably holds absorbing objects at various heights without the fragility associated with thin rods, thereby improving reliability while maintaining compact size.
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
The solution enables the creation of a robust and easy-to-assemble evaluation phantom, ensuring sufficient mechanical strength and clear transmission images without the risk of damage, even when designed for small specimens.
Implementation Method 1
three or more absorbing objects placed on the absorbing-object placement portion
Data Source
AI summary
A CT-device evaluation phantom to be placed between a light source for emitting a probe light and a two-dimensional detector when in use, including a ring-shaped supporting base and three or more absorbing objects whose transmittance to the probe light is equal to or lower than that of the supporting base. The CT-device evaluation phantom has a sufficient level of mechanical strength regardless of its size, and is also easy to create.