PET Motion Detection via Statistical Binning
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Solution Overview
Problem
Emission Computed Tomography (ECT) images, particularly Positron Emission Tomography (PET) scans, face challenges with motion blur due to respiratory and cardiac motions during chest or upper abdomen examinations, leading to suboptimal image quality.
Innovation Solution
A method and system for detecting cardiac gating in PET scans by obtaining a PET dataset, determining a reference point, dividing it into data frames, calculating statistical parameters to obtain a motion signal, and sorting the dataset into bins to reconstruct an image with reduced motion blur.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If ECT scanning is performed during chest or upper abdomen examinations, then functional and anatomical information can be obtained, but motion blur occurs due to respiratory and cardiac motions
Solution Approach 1:
The patent segments the acquired ECT data into multiple temporal frames or bins corresponding to different phases of the cardiac cycle. By dividing the continuous scanning data into discrete temporal segments, the system can reconstruct images for specific cardiac phases, thereby reducing motion blur caused by cardiac motion while preserving functional and anatomical information.
Solution Approach 2:
The patent implements preliminary motion detection and gating before image reconstruction. By detecting cardiac motion signals and establishing gating windows in advance, the system pre-selects data corresponding to specific cardiac phases before reconstruction, preventing motion blur rather than correcting it afterward.
2Manufacturing precision
If motion gating is implemented to reduce motion blur, then image quality improves, but scanning time and data processing complexity increase
Solution Approach 1:
The patent employs self-gating techniques where the ECT scanner uses its own acquired data to detect cardiac motion signals and determine gating windows, eliminating the need for external gating devices. This self-service approach reduces overall system complexity while maintaining motion compensation capabilities.
Solution Approach 2:
The patent makes the ECT scanner multi-functional by enabling it to perform both image acquisition and cardiac motion detection/gating determination using the same hardware system. This universality reduces the need for additional specialized equipment and simplifies the overall system architecture.
Data Source
AI summary
A system and method of imaging a patient are provided. The system may include an acquisition configured to obtain a PET dataset relating to a target organ of a patient. The system may also include a processing module configured to determine a reference point of the target organ, divide the PET dataset into a plurality of data frames, and determine a motion signal of the target organ based on a plurality of first statistical parameters and a plurality of second statistical parameters. The processing module may further sort the PET dataset into a plurality of bins based on the motion signal.