Digital Radiography Layout With Non-Coplanar Source Correction
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Solution Overview
Problem
Conventional digital radiography systems are limited by the requirement that the ray source and detectors must be arranged in the same plane, which restricts system design and fails to fully utilize the source and detectors, leading to image deformation due to both spatial and temporal deviations in projection angles.
Innovation Solution
A digital radiography system with detectors mounted on non-coplanar detector arm supports, utilizing an image processing apparatus for time and space deviation corrections, including angle calculation, deviation ratio determination, and interpolation to align detection data across different planes, allowing the ray source to be positioned outside the detector plane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the ray source and detectors are arranged in the same plane, then the system design is simplified, but the utilization of the ray source and detectors is insufficient and image deformation occurs
Solution Approach 1:
The patent transitions from a 2D coplanar arrangement to a 3D non-coplanar arrangement by positioning the ray source outside the detector plane. This dimensional change allows the ray source to illuminate objects from angles not constrained by the detector plane, improving image quality and source utilization while maintaining design feasibility through computational correction methods.
2Adaptability or versatility
If the ray source is positioned outside the detector plane, then source and detector utilization is improved, but spatial and temporal deviations cause image distortion
Solution Approach 1:
The patent changes the geometric parameters of the system by positioning the ray source at coordinates (xs, ys, zs) that are non-coplanar with the detectors. This parameter change improves utilization but introduces spatial and temporal deviations. The invention compensates for these deviations through image processing algorithms that correct the distorted projections, thereby maintaining image accuracy while achieving better source and detector utilization.
3Device complexity
If coplanar arrangement is used, then system complexity is reduced, but imaging flexibility is limited
Solution Approach 1:
The patent resolves this contradiction by moving the ray source to a non-coplanar position in 3D space, which increases imaging flexibility without significantly increasing overall system complexity. The additional computational complexity for deviation correction is offset by the gained versatility in source positioning and imaging capabilities.
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 enables accurate imaging by correcting for both spatial and temporal deviations, resulting in clearer and more flexible system design without the need for coplanar arrangement, enhancing image quality and utilization of the ray source.
Implementation Method 1
Digital Radiography (DR) is a technology combining computer digital image processing technology and radiography technology... after the interaction of rays with the object, due to different physical properties of the object, amounts of the emitted rays arriving at detectors are different
Data Source
AI summary
A digital radiography system and a digital radiography method. The digital radiography system includes: detectors (L) mounted on a plurality of detector arm supports (L1, L2) formed in a first plane (P); and a ray source (S) that is non-coplanar with the first plane (P). The digital radiography system further includes an image processing apparatus (10).