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Motion estimation and correction in SPECT, PET and CT.

Andre Z Kyme1,2, Roger R Fulton3,4,2

  • 1School of Biomedical Engineering, University of Sydney, Sydney, Australia.

Physics in Medicine and Biology
|June 8, 2021
PubMed
Summary

Patient motion degrades medical imaging like SPECT, PET, and CT. This review covers methods to estimate and correct motion, aiming for improved image quality and clinical feasibility, with deep learning showing promise.

Keywords:
PET and CTSPECTmotion compensationmotion correctionmotion estimationmotion tracking

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Area of Science:

  • Medical Imaging
  • Image Reconstruction
  • Radiological Sciences

Background:

  • Patient motion introduces artifacts in SPECT, PET, and CT imaging.
  • These artifacts degrade image quality, hindering accurate interpretation and quantification.
  • Significant research has focused on motion estimation and correction techniques over decades.

Purpose of the Study:

  • To outline the challenges posed by patient motion in medical imaging.
  • To critically review existing methods for estimating and correcting motion in SPECT, PET, and CT.
  • To identify areas for future development in motion correction technologies.

Main Methods:

  • Review of published literature on motion estimation and correction in SPECT, PET, and CT.
  • Analysis of techniques for characterizing rigid and non-rigid motion.
  • Evaluation of motion correction within modified image reconstruction frameworks.

Main Results:

  • Technical feasibility of motion correction demonstrated for rigid and non-rigid motion across modalities.
  • Differences in temporal and spatial resolution impact utility and application of motion correction.
  • Clinical feasibility remains a key objective for widespread adoption.

Conclusions:

  • Motion estimation and correction are critical for accurate medical image analysis.
  • Further development is needed, especially in data-driven and deep learning approaches.
  • Advancements in motion correction will enhance clinical utility and diagnostic accuracy.