SPECT Detector Pose Deviation Estimation via Translation Stage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The accuracy of deviation estimation and correction in single-photon emission computed tomography (SPECT) systems is low due to factors such as geometric errors and mechanical inaccuracies, leading to unreliable detection results and artifacts in reconstructed images.
Innovation Solution
A method and device for SPECT systems that involve controlling a target object to precise positions using a translation stage, determining actual and expected detection positions, and calculating pose deviations based on position differences to improve accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If deviation correction is performed using radiation source measurement in related art, then deviation estimation can be achieved, but the accuracy of deviation estimation remains low
Solution Approach 1:
The patent introduces a translation stage as an intermediary high-precision positioning device between the radiation source and the detection system. This intermediary component enables precise control and measurement of the radiation source position, thereby improving deviation estimation accuracy without requiring direct measurement from the radiation source alone.
Solution Approach 2:
The patent replaces the traditional mechanical measurement approach with an integrated system that combines translation stage positioning, projection detection, and coordinate transformation. This substitution of mechanical measurement with a multi-component system achieves higher precision in deviation estimation.
2Productivity
If the system detector position is not accurately known during scanning, then the scanning process can continue, but the detection results become unreliable and contain artifacts
Solution Approach 1:
The patent implements a feedback mechanism where the actual position of the radiation source is measured using the translation stage and projection detection, compared with the expected position, and the deviation is used to correct the detection results. This feedback loop ensures reliable detection results while maintaining scanning efficiency.
Solution Approach 2:
The patent performs preliminary position measurement and deviation calculation before the main scanning process. By pre-determining the actual position of the radiation source and calculating pose deviations in advance, the system ensures accurate detection results during the actual scanning without compromising productivity.
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
Enhances the accuracy of deviation estimation and correction, resulting in improved reliability of detection results and reduced artifacts in reconstructed images.
Implementation Method 1
determining an actual detection position of the target object detected by a system detector
Data Source
AI summary
The present disclosure relates to a deviation acquisition method for a single-photon emission computed tomography system, which includes: controlling a target object to move to a first target position through a translation stage, and determining an actual detection position of the target object detected by a system detector in a current pose; obtaining at least one first expected pose deviation; determining at least one expected detection position of the target object based on the first target position and the at least one first expected pose deviation, and obtaining at least one first position difference between the at least one expected detection position and the actual detection position; and determining an actual pose deviation between the expected pose and the current pose of the system detector based on the at least one first position difference corresponding to the at least one first expected pose deviation.