Micro Filter Array for Narrow Band X-Ray Selection
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Solution Overview
Problem
Broadband polychromatic X-rays used in medical and security imaging result in unclear images due to noise from varying frequency bands, leading to excessive radiation exposure, as existing filtering methods require precision and multiple filters for different bands.
Innovation Solution
An apparatus and method utilizing an array of micro filters coated to reflect specific narrow bands, controlled by a panel and a control unit to adjust angles based on a filter table, allowing for the conversion of broadband polychromatic X-rays into narrow band X-rays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a graded multilayer coated-filter is used to filter narrow band X-ray, then the narrow band X-ray can be selected, but precision coating with different thicknesses depending on location is required and a separate filter is needed for each narrow band
Solution Approach 1:
The filter is divided into multiple independent micro filters arranged in an array, where each micro filter corresponds to a specific narrow band X-ray frequency. This segmentation allows each micro filter to be independently controlled and rotated to select different frequency bands, eliminating the need for multiple separate filters while maintaining precise narrow band selection capability
Solution Approach 2:
The micro filters are made rotatable around their respective rotation axes, transforming a static filter system into a dynamic one. By rotating each micro filter to a specific angle, different narrow band X-rays can be selected from the same filter array, replacing the need for multiple fixed filters with a single dynamically adjustable filter system
2Ease of operation
If broadband polychromatic X-ray is used for imaging, then the imaging process is simple, but image clarity deteriorates due to noise from varying frequency bands and excessive radiation exposure occurs
Solution Approach 1:
The system extracts only the specific narrow band X-ray frequencies needed for imaging from the broadband polychromatic X-ray source. By using the micro filter array to select and isolate specific frequency bands, the system removes the harmful noise components while retaining the useful imaging frequencies, thereby improving image clarity without requiring a complete change to the imaging process
Solution Approach 2:
The system changes the frequency parameter of the X-ray by selectively filtering out specific narrow bands from the broadband spectrum. By adjusting the rotation angles of the micro filters, different frequency bands can be selected to match the optimal imaging requirements for different materials and subjects, improving both image quality and radiation safety
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 precise output of narrow band X-rays, reducing radiation exposure and improving image clarity by focusing on specific frequency bands, facilitating the production of phase contrast X-ray images and enabling precise control over X-ray outputs.
Implementation Method 1
the micro filters are coated such that the micro filters reflect only a narrow band X-ray having a predefined band from the broadband polychromatic X-ray
Data Source
AI summary
Disclosed are an apparatus and method of filtering a narrow band X-ray. The apparatus includes a micro filter array to configure a plurality of micro filters in an array, a filter array storing unit to store a filter table having information about an angle of each of the plurality of micro filters within the micro filter array, and a control unit to retrieve the filter table to ascertain the angle of each of the plurality of micro filters. The control unit also controls an angle between each of the plurality of micro filters and a panel supporting the plurality of micro filters to be the ascertained angle, and filters and output a received broadband polychromatic X-ray to be the narrow band X-ray.