SPECT Detector Head Obstruction Avoidance
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Solution Overview
Problem
Conventional SPECT imaging systems face limitations in design and operational characteristics, such as obstructions within the field of view caused by detector configurations, which hinder image quality and flexibility, and require additional hardware to address these issues.
Innovation Solution
An imaging system with a gantry and movable detector heads that adjust angles, a controller to update the system matrix with obstruction information, and position sensors to determine the field of view, allowing for image reconstruction and acquisition even with obstructions, enhancing image quality and system flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple detectors are installed in the gantry to improve imaging coverage and quality, then image quality is improved, but obstructions are caused by detectors blocking the field of view of other detectors
Solution Approach 1:
The detector heads are made movable relative to the detector arms, allowing dynamic adjustment of detection angles. The controller pivots detector heads to optimal positions during imaging to avoid obstructions while maintaining comprehensive field of view coverage, resolving the contradiction between multiple detectors and obstruction
Solution Approach 2:
The system dynamically changes the angular parameters of detector heads based on real-time obstruction detection. When obstructions are detected, the controller adjusts the angle of detector heads to alternative positions, modifying the geometric parameters to eliminate blocking while preserving imaging quality
2Measurement precision
If additional hardware configurations are added to address obstruction issues, then image quality is improved, but system complexity and cost increase
Solution Approach 1:
The system uses its existing movable detector heads and controller to automatically detect and compensate for obstructions through software-based matrix updates, eliminating the need for additional dedicated hardware solutions. The detectors serve dual purposes: both imaging and obstruction compensation
Solution Approach 2:
The patent replaces potential mechanical solutions (additional hardware configurations) with a software-based approach using matrix updates to correct for obstructions. The controller modifies system matrices to account for blocked fields of view, substituting mechanical complexity with computational correction
3Area of stationary object
If detector heads are positioned to maximize field of view coverage, then imaging coverage is improved, but obstructions block portions of the field of view
Solution Approach 1:
The detector heads are pivoted dynamically during the imaging process to optimize their angular positions. The controller continuously adjusts detector head angles to maximize field of view coverage while avoiding obstructions, achieving both comprehensive coverage and minimal blocking through dynamic repositioning
Data Source
AI summary
Imaging systems, methods, and computer readable mediums are provided. Image detectors are installed in a gantry to detect image information related to a subject. If obstructions are detected related to the field of view of an image detector, a system matrix can be updated accordingly. Thus, upon image reconstruction, artifacts related to obstructions can be minimized or altogether eliminated. This system can be a Nuclear Medicine (NM) imaging system to acquire Single Photon Emission Computed Tomography (SPECT) image information.