Dual-Source Imaging System Asymmetric Detector FOV Expansion
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Solution Overview
Problem
Dual-source scanning devices with detectors of different field of views (FOVs) face limitations in image reconstruction accuracy and range due to the relatively small FOV of one detector, leading to inaccurate images and insufficient data when scanning objects larger than the FOV.
Innovation Solution
The implementation of an asymmetric first scanning system with overlapping FOVs between the first and second detectors, allowing for extended FOV and improved reconstruction accuracy by combining detection data from both detectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a dual-source scanning device uses two detector systems with different fields of view, then the device can be designed within reasonable geometric constraints and gantry space, but the reconstruction accuracy and range are limited by the smaller FOV detector
Solution Approach 1:
The patent combines detection data from two detector systems with different FOVs through data merging and integration. The first detector with larger FOV and the second detector with smaller FOV both scan the same object, and their detection data are combined to achieve both extended coverage and high reconstruction accuracy within the overlapping region
Solution Approach 2:
The patent segments the detection task by assigning different detectors to different detection areas. The first detector covers a first detection area while the second detector covers a second detection area, with at least partial overlap between them. This segmentation allows each detector to optimize for its specific area while contributing to the overall reconstruction
2Area of moving object
If the scanned object size exceeds the scanning FOV of the detector system with smaller FOV, then the device can handle larger objects, but accurate image reconstruction outside the scanning field becomes impossible
Solution Approach 1:
The patent extends the reconstruction range by utilizing data from the first detector with larger FOV to supplement the second detector's limited FOV. Through data extension techniques, the reconstruction range exceeds the physical FOV of the smaller detector, enabling accurate reconstruction of larger objects by effectively adding a dimensional aspect to the detection capability
3Area of stationary object
If asymmetric detector configuration is used to expand FOV, then the scanning coverage is improved, but the system complexity increases
Solution Approach 1:
The patent makes the detection system universal by having both detectors perform the same scanning function on the same object. The first and second detectors both scan the object to generate detection data, making each detector multi-functional in contributing to both extended FOV coverage and accurate reconstruction through their combined data
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 effectively enlarges the scanning FOV and reconstruction range, enhances image reconstruction accuracy, and reduces image artifacts, thereby improving the overall performance of dual-source scanning systems.
Implementation Method 1
obtaining first detection data and second detection data acquired by scanning an object using a first detector and a second detector of an imaging device respectively
Implementation Method 2
obtaining first detection data and second detection data acquired by scanning an object using a first detector and a second detector of an imaging device respectively
Data Source
AI summary
The embodiments of the present disclosure provide an imaging method, an imaging system, a dual-source scanning system, and a method for controlling the dual-source scanning system. The imaging method includes: obtaining first detection data and second detection data acquired by scanning an object using a first detector and a second detector of an imaging device respectively, and obtaining a first reconstructed image by performing image reconstruction based on the first detection data and the second detection data. The first reconstructed image can cover an area not detected by the first detector, thus expanding a reconstruction range. The dual-source scanning system includes afirst scanning system and a I second scanning system, wherein at least one of the first detector or the second detector has an asymmetric structure relative to a central channel thereof. A first scanning FOV of the first scanning system and a second scanning FOV of the second scanning system are at least partially overlapped.