Unitary Scintillator Light Guide Detector Array for Medical Imaging
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Solution Overview
Problem
Conventional medical imaging system detector arrays face issues due to refractive index mismatches between scintillator elements, light guides, and light sensors, leading to reduced light signal intensity and alignment challenges during fabrication.
Innovation Solution
The detector units are designed with scintillator elements and light guides formed unitarily from the same material, eliminating refractive index mismatches and improving alignment precision by machining work pieces to create detector units with integrated scintillator and light guide components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If scintillator elements and light guide are fabricated from different materials and bonded using adhesive, then the detector unit can be assembled with separate components, but refractive index mismatch occurs reducing light signal intensity
Solution Approach 1:
The patent merges the scintillator elements and light guide into a single unitary component fabricated from the same material. This eliminates the interface between different materials and adhesive layers, thereby eliminating refractive index mismatches that cause light signal loss. The merged structure ensures optimal light transmission from scintillator to light sensor without interruption at material boundaries.
Solution Approach 2:
The patent applies homogeneity by fabricating both the scintillator elements and light guide from the same material with matching refractive indexes. This homogeneous construction eliminates optical impedance mismatches at interfaces, ensuring continuous and efficient light signal transmission throughout the detector unit without reflection or scattering losses.
2Ease of manufacture
If scintillator elements are bonded to light guide using adhesive, then the components can be separately fabricated, but alignment precision deteriorates requiring specialized alignment devices
Solution Approach 1:
By combining the scintillator elements and light guide into a single monolithic structure fabricated from one piece of material, the patent eliminates the alignment step entirely. The integrated geometry ensures precise spatial relationships between scintillator elements and light guide surfaces without requiring external alignment devices or complex bonding procedures.
3Adaptability or versatility
If multiple individual scintillator elements are bonded to a single light guide, then the detector unit can process more scintillator elements than light sensors, but fabrication complexity increases due to alignment requirements
Solution Approach 1:
The patent applies segmentation by dividing the unitary scintillator-light guide structure into multiple scintillator element regions within a single integrated component. This allows multiple scintillator elements to be processed while maintaining the simplicity of unitary fabrication, as each scintillator element is an integrated portion of the whole structure rather than a separate component requiring alignment.
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 approach enhances light signal transmission efficiency and reduces fabrication time by eliminating refractive index mismatches and improving alignment precision, resulting in improved performance and cost-effectiveness of medical imaging systems.
Implementation Method 1
Each detector unit may include a plurality of detector scintillator elements that are configured to emit absorbed energy in the form of light
Implementation Method 2
The scintillator elements transmit the light, via a light guide, to an array of light sensors
Data Source
AI summary
A detector unit for a detector array includes a photo sensor array, a light guide, and a plurality of scintillator elements formed unitarily with the light guide, the scintillator elements configured to emit absorbed energy in the form of light, the light guide being configured to transmit the light received from at least one of the scintillator elements to a photo sensor, the light guide and the plurality of scintillators being formed from the same material, an area covered by the photo sensors being smaller than an area covered by the scintillator elements and a number of photo sensors being less than a number of scintillator elements. A detector array and a method of manufacturing a detector array are also described herein.