Adjustable Detector Array for Nuclear Medicine Imaging
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Solution Overview
Problem
Nuclear medicine imaging systems face challenges in patient comfort due to the close proximity of detector arrays, which can cause physical and mental discomfort, and are limited by the configuration of cadmium zinc telluride (CZT) modules, particularly with single-row detector units that restrict imaging sensitivity.
Innovation Solution
An adjustable detector array with a combination of first and second detector units, where the first units have multiple rows of CZT modules and the second units have fewer rows, arranged on an annular gantry that can rotate and translate to conform to the patient, equipped with sensors to avoid contact and optimize imaging sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the detector array is positioned in close proximity to the patient to increase imaging sensitivity, then the imaging sensitivity is improved, but the patient experiences physical discomfort (pinching) and mental discomfort (claustrophobia)
Solution Approach 1:
The detector array is designed to be dynamically adjustable, allowing it to move between different positions relative to the patient. The system can extend to achieve close proximity for high sensitivity imaging when needed, and retract to provide patient comfort during positioning or non-critical imaging phases. This dynamic positioning capability resolves the contradiction by making the proximity relationship variable rather than fixed.
2Device complexity
If a single row of CZT modules is used in each detector to simplify the detector configuration, then the device complexity is reduced, but the imaging sensitivity is fundamentally limited
Solution Approach 1:
The detector array is segmented into multiple independent detector units, each containing multiple rows of CZT modules. This segmentation allows the system to achieve high imaging sensitivity through the combined capability of multiple detector elements while maintaining modular simplicity. Each detector unit can be independently configured and positioned, resolving the contradiction between complexity and sensitivity.
Solution Approach 2:
The detector array transitions from a single-row configuration to a multi-row three-dimensional arrangement. By adding the dimension of multiple rows stacked perpendicular to the imaging plane, the system achieves enhanced sensitivity without proportionally increasing overall system complexity, as each row operates independently within the modular detector unit structure.
3Measurement precision
If the detector units are made larger with multiple rows of CZT modules to improve imaging sensitivity, then the imaging sensitivity is improved, but the device complexity and space requirements increase
Solution Approach 1:
The large detector array is divided into multiple smaller, identical detector units that can be independently manufactured, tested, and assembled. This segmentation reduces the complexity of individual components while achieving the desired total sensitivity through the combined effect of multiple units. The modular approach allows for easier maintenance and replacement without requiring complex integration of a single large detector.
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
The adjustable detector array enhances imaging flexibility and sensitivity by allowing the detector units to adjust their position and configuration based on patient size, reducing discomfort and improving imaging resolution, while maintaining close proximity to the patient without physical contact.
Implementation Method 1
Nuclear medicine (NM) imaging systems may include multiple detectors or detector heads for imaging a subject... the detectors may be positioned adjacent to the subject on a gantry to acquire NM imaging data (e.g., radioactivity)
Data Source
AI summary
Methods and systems are provided for a medical imaging system having a detector array. In one example, the detector array may include a plurality of adjustable imaging detectors, each of the plurality of adjustable imaging detectors including a first detector unit or a second detector unit, each first detector unit having a plurality of rows of detector modules and each second detector unit having at least one row of detector modules, wherein each second detector unit may have fewer rows of detector modules than each first detector unit, the plurality of adjustable imaging detectors may be arranged on an annular gantry, the annular gantry configured for rotation about an axis of a cylindrical aperture of the annular gantry, the axis extending a length of the cylindrical aperture, and each of the plurality of adjustable imaging detectors may be disposed within the cylindrical aperture and may extend orthogonally toward the axis.