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Management of Respiratory Motion Artefacts in 18F-fluorodeoxyglucose Positron Emission Tomography using an Amplitude-Based Optimal Respiratory Gating Algorithm
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Motion-correction strategies for enhancing whole-body PET imaging.

James Wang1,2, Dalton Bermudez2, Weijie Chen1,3

  • 1Department of Radiology, University of Wisconsin Madison, Madison, WI, United States.

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|August 9, 2024
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Summary

Patient motion degrades Positron Emission Tomography (PET) imaging. Motion gating techniques, using hardware or data, correct artifacts and improve diagnostic quality in whole-body PET scans.

Keywords:
cardiac gatingdata-driven gatinghardware-driven gatingmotion correctionpositron emission tomography (PET)respiratory gating

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Area of Science:

  • Medical Imaging
  • Nuclear Medicine

Background:

  • Positron Emission Tomography (PET) is crucial for disease detection and monitoring.
  • Patient motion significantly degrades PET image quality and diagnostic accuracy.
  • Motion artifacts compromise quantitative tracer uptake measurements.

Purpose of the Study:

  • To review and outline motion gating techniques for whole-body PET imaging.
  • To discuss the impact of motion correction on diagnostic and quantitative PET image quality.

Main Methods:

  • Overview of hardware-driven gating approaches utilizing external motion sensors.
  • Explanation of data-driven gating methods that derive motion from imaging data.
  • Discussion of motion sources addressed: head, respiratory, and cardiac motion.

Main Results:

  • Motion gating effectively corrects for motion artifacts in PET imaging.
  • Improved accuracy in tracer uptake measurements is achieved through motion correction.
  • Enhanced diagnostic and quantitative quality of whole-body PET images.

Conclusions:

  • Motion gating is essential for high-quality whole-body PET imaging.
  • Both hardware- and data-driven methods offer solutions to motion-related artifacts.
  • Continued research in motion gating significantly impacts clinical PET applications.