Extended-Axial SPECT Detector Support for Sag-Free Imaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional SPECT detectors with a 40 cm axial field of view (FOV) are inadequate for dosimetry and therapy planning, requiring multiple acquisitions and lengthy reconstruction times, and larger detectors face engineering challenges and image accuracy issues.
Innovation Solution
A SPECT detector system with extended axial FOV is supported at both ends to prevent sagging, using multiple detectors with different collimator types for simultaneous image acquisition from various angles, allowing a single acquisition to cover large axial dimensions without stitching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If a larger detector is used to increase axial FOV, then image coverage is improved, but detector weight increases causing sagging and geometric anomalies
Solution Approach 1:
The detector system is divided into multiple separate detector modules, each with its own support structure. This allows the total axial FOV to be achieved through segmentation rather than a single large detector, preventing weight-related sagging and geometric anomalies while maintaining extended axial coverage capability
2Length of stationary object
If multiple detectors are used to extend axial FOV, then image coverage is improved, but device complexity increases
Solution Approach 1:
The system uses multiple independent detector modules that can be configured in different arrangements. Each module is a standardized unit with integrated support, simplifying the overall system design compared to a single large detector while achieving extended axial FOV through modular segmentation
Solution Approach 2:
The detector modules are designed to be multi-functional, serving both as imaging detectors and as self-supported structures. The supports serve dual purposes: mechanical support and positioning, reducing the need for additional complex support infrastructure
3Measurement precision
If conventional acquisition methods are used for long axial FOV, then image quality is maintained, but acquisition time increases beyond 30 minutes
Solution Approach 1:
The extended axial FOV detector enables continuous acquisition of projection images across the entire long axial range in a single rotational scan, eliminating the need for multiple separate acquisitions and stitching operations. This continuous imaging approach maintains image quality while reducing acquisition time to under 30 minutes
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
Facilitates rapid acquisition of high-quality, long axial FOV images, reducing acquisition time and eliminating the need for multiple acquisitions, while maintaining image accuracy and supporting large detectors without geometric anomalies.
Implementation Method 1
a radioactive substance is administered to a subject, and resulting γ-radiation emitted from the subject is detected by a SPECT detector
Implementation Method 2
using a NaI scintillator
Data Source
AI summary
A system includes a housing having a first end portion and a second end portion, a SPECT detector disposed in the housing, a first support, a first coupling coupled to the first end portion of the housing and to the first support, a second support defining a bore, and a second coupling coupled to the second end portion of the housing and to the second support, where the housing is disposed between the first support and the second support.