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Related Concept Videos

Brain Imaging01:14

Brain Imaging

Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans),  magnetic resonance imaging (MRI),  functional magnetic resonance imaging (fMRI), and Transcranial Magnetic Stimulation (TMS).

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Prospective motion correction in brain imaging: a review.

Julian Maclaren1, Michael Herbst, Oliver Speck

  • 1Medical Physics, Department of Radiology, University Medical Center Freiburg, Freiburg, Germany. jmacl@stanford.edu

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Prospective motion correction uses real-time adjustments to improve MRI scans by tracking patient movement. This technique enhances brain imaging and spectroscopy, though challenges in implementation and magnetic field distortions remain.

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Area of Science:

  • Medical Imaging
  • Biophysics
  • Neuroimaging

Background:

  • Motion artifacts are a significant challenge in Magnetic Resonance Imaging (MRI).
  • Early methods for motion correction were proposed over two decades ago.
  • Recent advancements integrate real-time correction with advanced tracking systems.

Purpose of the Study:

  • To describe the fundamentals of prospective motion correction (PMC).
  • To review the latest developments in PMC for brain imaging and spectroscopy.
  • To discuss the challenges and future potential of PMC.

Main Methods:

  • Real-time adjustment of MRI pulse sequences.
  • Integration of navigator and external tracking mechanisms for 6-degree-of-freedom motion quantification.
  • Application to various MRI sequences, particularly for brain imaging.

Main Results:

  • PMC quantifies rigid-body motion in real-time.
  • The technique is applicable to most MRI sequences and shows promise for clinical routine.
  • Challenges include tracking data delay and magnetic field distortions from moving objects.

Conclusions:

  • PMC has evolved significantly, offering improved MRI quality, especially in neuroimaging.
  • Despite implementation hurdles, PMC holds substantial potential for widespread clinical adoption.
  • Further research is needed to overcome current limitations and fully realize PMC's capabilities.