Radiation Imaging Attenuation Member for Artifact Reduction
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Solution Overview
Problem
Radiation imaging apparatuses face challenges in reducing weight while minimizing artifacts caused by backscattered radiation, as existing techniques either increase weight or compromise image quality.
Innovation Solution
A radiation imaging apparatus with an attenuation member on the second surface, made of material with higher radiation transmittance than the surrounding parts, covering the end portion of the outline overlapping the radiation detection unit, to attenuate backscattered radiation and reduce artifacts without increasing the overall weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an attenuation member with low radiation transmittance (high weight) is used to reduce backscattered radiation, then artifact reduction is improved, but the weight of the radiation imaging apparatus increases
Solution Approach 1:
The attenuation member is designed with non-uniform thickness, having a first thickness in a first region and a second thickness different from the first thickness in a second region. This local variation in thickness allows different regions to have different attenuation capabilities, reducing backscattered radiation artifacts in critical areas while minimizing weight in other regions.
Solution Approach 2:
The invention changes the physical parameter of the attenuation member by varying its thickness across different regions. By adjusting the thickness parameter, the radiation transmittance is optimized locally - thicker regions provide stronger attenuation where needed, while thinner regions reduce overall weight, thus resolving the contradiction between artifact reduction and weight reduction.
2Weight of stationary object
If an attenuation member with high radiation transmittance (low weight) is used, then the weight of the radiation imaging apparatus is reduced, but the ability to attenuate backscattered radiation is insufficient
Solution Approach 1:
Different regions of the attenuation member have different thicknesses, creating local quality variations. Regions requiring stronger attenuation have greater thickness, while other regions have reduced thickness to minimize weight, achieving both weight reduction and adequate backscattered radiation attenuation.
Solution Approach 2:
The thickness parameter of the attenuation member is optimized by changing it across different regions. This parameter variation allows the system to achieve the minimum necessary attenuation in each region while keeping the overall weight low, resolving the contradiction between sufficient radiation attenuation and weight reduction.
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 effectively reduces artifacts in radiation images by minimizing the difference in backscattered radiation reaching the detection unit, thereby enhancing image quality while maintaining a lightweight apparatus.
Implementation Method 1
a plurality of pixels, each configured to convert the radiation into an electric signal
Implementation Method 2
an attenuation member provided the second surface side with respect to the radiation detection unit and configured to attenuate backscattered radiation incident on the radiation detection unit from the second surface side
Data Source
AI summary
A radiation imaging apparatus includes an attenuation member on the back surface side opposite the radiation incident surface of a radiation detection unit. The attenuation member is configured to reduce unexpected appearance of a part disposed on the back surface side of the radiation imaging apparatus, the unexpected appearance of which occurs due to backscattered radiation reflected by the structured part on the back surface side of the radiation imaging apparatus. The attenuation member includes a material having a radiation transmittance higher than that of the part and covers the end portion of the outline of the part that overlaps the radiation detection unit in orthogonal projection onto the surface opposite the incident surface of the radiation detection unit, and the area of the attenuation member is smaller than that of the radiation detection unit.