Movable Detector Heads for Nuclear Medicine Imaging Resolution
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Solution Overview
Problem
In Nuclear Medicine imaging systems with multiple detectors, the resolution degrades with distance from the subject due to the size and spacing of detector heads, preventing close proximity to the subject and resulting in reduced image resolution for both smaller and larger subjects.
Innovation Solution
A gantry-based system with movable detector units that can move in parallel axes, allowing for efficient positioning of detector units relative to the subject, including rotation and linear motion, to maintain high resolution and sensitivity for subjects of different sizes and shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If detector heads are positioned close to the subject to improve resolution, then image resolution improves, but detector heads collide when imaging smaller subjects
Solution Approach 1:
The detector system is divided into multiple independent detector heads that can be individually positioned and controlled. This segmentation allows each detector head to be independently adjusted to avoid collisions while maintaining close proximity to the subject for high-resolution imaging.
Solution Approach 2:
The detector heads are made dynamically adjustable with independent positioning mechanisms, allowing them to move and reconfigure based on subject size and shape. This dynamic capability enables the system to adapt to different imaging scenarios without collisions.
2Adaptability or versatility
If detector heads are moved apart to focus on larger subjects, then field of view increases, but gaps between detectors increase reducing resolution
Solution Approach 1:
Multiple detector heads are used instead of a single large detector, allowing the system to maintain high resolution across larger fields of view by distributing detection elements across multiple positioned units.
Solution Approach 2:
The detector system is designed to be universally adaptable to subjects of various sizes through independent detector head positioning, enabling the same system to achieve high resolution for both small and large subjects without requiring separate specialized equipment.
3Device complexity
If fixed detector spacing is used to simplify system design, then device complexity reduces, but image resolution degrades for subjects of varying sizes
Solution Approach 1:
The detector positioning system incorporates dynamic adjustment capabilities that allow detector heads to be repositioned based on subject characteristics. This dynamic design maintains high resolution for varying subject sizes while using standardized components to control complexity.
Solution Approach 2:
The system allows change in detector positioning parameters (distance, angle, orientation) based on subject size and shape requirements. This parameter adjustability enables optimization of image resolution for different imaging scenarios without requiring completely different system configurations.
Data Source
AI summary
Methods and apparatus for imaging with detectors having moving heads are provided. One apparatus includes a gantry and a plurality of detector units mounted to the gantry. At least some of the plurality of detector units are movable relative to the gantry to position one or more of the detector units with respect to a subject. The detector units are movable along parallel axes with respect to each other.