SPECT Detector Units with Movable Heads for 2D Imaging
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Solution Overview
Problem
Current Single Photon Emission Computed Tomography (SPECT) systems require acquiring 3D image data even when only 2D images are desired, leading to increased time and complexity in the scan and image reconstruction process due to the need for conversion from 3D to 2D data.
Innovation Solution
An imaging system with a gantry and movable detector units that can be controlled to acquire both 2D and 3D SPECT data, where the detector units remain in a fixed relative orientation for 2D data acquisition and move individually for 3D data acquisition, allowing direct generation of 2D images without the need for conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If 3D image data is acquired using moving detector heads, then the system can provide three-dimensional imaging capability, but the scan time is increased and the process becomes more complex when only 2D images are desired
Solution Approach 1:
The system dynamically adjusts the operation mode of detector heads between individual movement for 3D imaging and fixed relative orientation for 2D imaging. The controller selectively controls whether detector heads move individually or remain in fixed relative positions based on the imaging requirement, optimizing scan time while maintaining versatility.
Solution Approach 2:
The imaging system segments the detector array into multiple independently controllable detector heads. This segmentation allows selective operation where some detector heads can move individually for 3D imaging while others remain fixed for 2D imaging, or all can operate in fixed configuration for pure 2D acquisition, resolving the time-versatility contradiction.
2Adaptability or versatility
If 3D image data is acquired using moving detector heads, then the system can provide three-dimensional imaging capability, but the image reconstruction process becomes more complex
Solution Approach 1:
The reconstruction process dynamically adapts to the acquisition mode. When detector heads operate in fixed relative orientation for 2D imaging, the system applies simplified 2D reconstruction algorithms. When individual detector head movement is used for 3D imaging, the system switches to 3D reconstruction algorithms, optimizing processing complexity based on the imaging mode.
Solution Approach 2:
The reconstruction process is segmented into different algorithmic paths based on the acquisition mode. The system separates 2D reconstruction algorithms from 3D reconstruction algorithms, allowing the simpler 2D path to be used when appropriate, thereby reducing overall system complexity while maintaining 3D capability when needed.
3Adaptability or versatility
If detector units move individually to acquire 3D data, then three-dimensional imaging is achieved, but the relative orientation between detector units changes
Solution Approach 1:
The system implements dynamic configuration control where the relative orientation of detector units is stable during 2D acquisition but changes during 3D acquisition. The controller manages these transitions, allowing the detector array to adapt its configuration stability based on the imaging mode requirements.
Solution Approach 2:
The detector array is segmented into independently controllable units that can maintain fixed relative orientations as a group for 2D imaging while allowing individual units to change orientation for 3D imaging. This segmentation enables flexible configuration management.
Data Source
AI summary
Systems and methods for planar imaging with detectors having moving heads are provided. One system includes a gantry having an opening therethrough, a patient table movable through the opening of the gantry along an examination axis, and a plurality of detector units mounted to the gantry and aligned in a row transverse to the examination axis. The plurality of detector units are spaced apart from each other, wherein the spacing forms gaps between adjacent detector units. The plurality of detector units are configured to acquire Single Photon Emission Computed Tomography (SPECT) data. The system further includes a controller configured to control movement of the patient table and the plurality of detector units to acquire two-dimensional (2D) SPECT data, wherein the plurality of detector units remain in a fixed relative orientation with respect to each other when acquiring the 2D SPECT data and move together to acquire the 2D SPECT data.