Multi-Head Camera Dynamic Scanning for Reduced Nuclear Imaging Time
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Solution Overview
Problem
Nuclear medicine imaging systems with multi-head detectors face inefficiencies due to the acquisition of non-diagnostically useful information during sweeps, leading to prolonged acquisition times and reduced image quality.
Innovation Solution
A multi-head imaging system with a gantry-mounted detector units that dynamically determine acquisition ranges based on photon counts, adjusting pivot speeds and directions to focus on regions of interest, using processor-controlled detectors to optimize image acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the detector sweeps through a full range to cover all possible regions, then the field of view is maximized, but the acquisition time increases due to collecting non-interesting information
Solution Approach 1:
The detector sweep range is dynamically adjusted based on the detected position and extent of the region of interest. Instead of a fixed full-range sweep, the system modifies the angular positions and sweep extent in real-time to cover only the necessary area containing the region of interest, thereby reducing acquisition time while maintaining complete coverage of relevant structures
Solution Approach 2:
The imaging system applies different sweep parameters to different angular positions based on local requirements. Regions containing the region of interest receive focused, extended sampling while areas without interest use reduced or skipped sampling, creating a non-uniform acquisition strategy that optimizes time efficiency while preserving diagnostic quality where needed
2Loss of information
If the detector collects information from all regions during sweeping, then complete data coverage is achieved, but the image quality decreases due to inefficient use of acquisition time on non-interesting areas
Solution Approach 1:
The system dynamically adjusts the detector sweep parameters to concentrate sampling efforts on regions containing the region of interest. By modifying angular positions and sweep extent based on detected ROI location, the system ensures complete data coverage of relevant areas while reducing redundant sampling in non-interesting regions, thereby improving image quality through more efficient use of acquisition time
Solution Approach 2:
The imaging system automatically identifies the region of interest and self-adjusts the sweep parameters without requiring manual intervention or pre-programmed knowledge of the ROI location. The system uses real-time detection data to guide the acquisition strategy, allowing it to adapt and optimize data collection for image quality improvement autonomously
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
This approach reduces acquisition time and enhances image quality by focusing acquisition time on regions of interest, improving diagnostic utility.
Implementation Method 1
In nuclear medicine (NM) imaging, such as single photon emission computed tomography (SPECT) or positron emission tomography (PET) imaging, radiopharmaceuticals are administered internally to a patient. Detectors (e.g., gamma cameras), typically installed on a gantry, capture the radiation emitted by the radiopharmaceuticals
Data Source
AI summary
A nuclear medicine (NM) multi-head imaging system is provided that includes a gantry, plural detector units mounted to the gantry, and at least one processor operably coupled to at least one of the detector units. The detector units are mounted to the gantry. Each detector unit defines a detector unit position and corresponding view oriented toward a center of the bore. Each detector unit is configured to acquire imaging information over a sweep range corresponding to the corresponding view. The at least one processor is configured to, for each detector unit, determine plural angular positions along the sweep range corresponding to boundaries of the object to be imaged, generate a representation of each angular position for each detector unit position, generate a model based on the angular positions using the representation, and determine scan parameters to be used to image the object using the model.