Detector Alignment Measurement Using Collimated Beam Signals
Solution Overview
Problem
Current medical imaging systems face challenges in aligning detector field replaceable modules, relying on experimentally determined scale factors that are time-consuming and computationally expensive, leading to degraded image quality and increased radiation dosage.
Innovation Solution
A method and system that determine the alignment of a detector with respect to a collimated radiation beam using signals from multiple detector cells, independent of the beam's shape, allowing for precise alignment of detector modules without the need for experimental scale factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If experimental scale factors are used for detector alignment, then alignment can be achieved, but the process becomes time-consuming and computationally expensive
Solution Approach 1:
The patent replaces the experimental/mechanical determination of scale factors with a mathematical model-based approach. The alignment is calculated using signals from detector cells and a mathematical model of the collimated beam geometry, eliminating the need for time-consuming experimental measurements and iterative computations to determine scale factors.
2Measurement precision
If experimental scale factors are used for detector alignment, then alignment can be achieved, but computational expense increases
Solution Approach 1:
The patent substitutes experimental determination with a direct mathematical calculation approach. By using the geometric relationship between the collimated beam and detector cells in a mathematical model, the system computes alignment directly from signal data without iterative optimization or complex computational algorithms, significantly reducing CPU time and computational resource requirements.
3Measurement precision
If detector alignment is performed as a single unit, then overall alignment is achieved, but field replaceable modules cannot be individually aligned
Solution Approach 1:
The patent segments the detector into field replaceable modules, each with its own alignment calculation. The mathematical model allows independent alignment computation for each module by using signals from specific detector cells within each module, enabling individual module alignment while maintaining overall system alignment.
4Measurement precision
If adjustment is made for more sensitive measurements, then measurement sensitivity improves, but additional effort and time are required
Solution Approach 1:
The patent changes the approach from experimental parameter determination to using fixed geometric parameters of the collimated beam. By using the known mathematical model of the beam geometry and detector cell positions, the system achieves high measurement sensitivity without requiring additional experimental adjustments or recalibrations, as the geometric parameters are inherently known from the system design.
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 efficient and accurate alignment of detector modules, improving image quality and reducing radiation exposure, while simplifying the process by eliminating the reliance on experimental scale factors, thus reducing time and computational effort.
Implementation Method 1
The detector detects a beam coming from illuminating source through the beam collimator
Data Source
AI summary
A method for measuring an alignment of a detector is described. The method includes determining, by a processor, the alignment of the detector with respect to a collimated radiation beam. The determination of the alignment is based on a plurality of signals from a first cell of the detector and a second cell of the detector, and is independent of a shape of the collimated radiation beam.