Flexible Sensor Board Reinforcement for Radiographic Imaging
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Solution Overview
Problem
Radiographic imaging apparatuses using flexible substrates for sensor boards face issues with discontinuous deflection, which can lead to image artifacts and reduced image quality due to the lower stiffness of resinous substrates compared to glass substrates, making it difficult to suppress the influence of deflection on image quality through image correction.
Innovation Solution
The implementation of a radiation detector design that includes a flexible substrate with a conversion layer, a protective film, a reinforcing member, and a supporting member to reinforce the substrate, where the supporting member supports the reinforcing member with the reinforcing member sandwiched between the supporting member and the substrate, effectively suppressing discontinuous deflection by enhancing the stiffness and dampproofness of the sensor board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a flexible substrate is used for the sensor board, then the weight of the radiographic imaging apparatus is reduced and the subject can be easily imaged, but the substrate experiences deflection which degrades the durability and dampproofness of the conversion layer
Solution Approach 1:
The patent applies composite materials by combining the flexible resinous substrate with a reinforcing member made of a different material having higher stiffness. This composite structure maintains the flexibility and light weight of the resinous substrate while the reinforcing member suppresses deflection, thereby protecting the conversion layer's durability and dampproofness without adding excessive weight.
2Ease of operation
If a flexible substrate is used for the sensor board, then the radiographic imaging apparatus becomes more flexible and easier to position, but discontinuous deflection occurs which causes image artifacts and deteriorates image quality
Solution Approach 1:
The composite structure of flexible substrate plus reinforcing member enables the sensor board to be easily positioned while suppressing discontinuous deflection during imaging, thereby maintaining image quality without sacrificing operational flexibility.
Solution Approach 2:
The reinforcing member is strategically positioned to provide localized stiffness enhancement at critical areas of the substrate, suppressing deflection where it would cause image artifacts while preserving the overall flexibility of the sensor board for easy positioning.
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 design effectively suppresses discontinuous deflection of the sensor board, improving image quality by maintaining the flexibility of the substrate while enhancing its stiffness and preventing peeling of the conversion layer, thereby reducing image artifacts and maintaining image integrity.
Implementation Method 1
a conversion layer, such as a scintillator, which converts radiation into light
Data Source
AI summary
The radiation detector includes: a sensor board including a flexible substrate and a layer which is provided on a first surface of the substrate and in which a plurality of pixels, which accumulate electrical charges generated in accordance with light converted from radiation, are formed; a conversion layer that is provided on a side, opposite to the substrate, of the layer in which the pixels are formed, and converts radiation into light; protective film that covers at least the conversion layer; a reinforcing member provided on a second surface opposite to the first surface of the substrate; and a supporting member that supports the reinforcing member with the reinforcing member sandwiched between the supporting member and the second surface of the substrate.