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Related Experiment Videos

Adaptive sensitivity encoding incorporating temporal filtering (TSENSE).

P Kellman1, F H Epstein, E R McVeigh

  • 1Laboratory of Cardiac Energetics, National Institutes of Health, National Heart, Lung and Blood Institute, Bethesda, Maryland 20892-1061, USA. kellman@nih.gov

Magnetic Resonance in Medicine
|April 27, 2001
PubMed
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This study introduces adaptive TSENSE, combining temporal filtering (UNFOLD) and spatial sensitivity encoding (SENSE) for faster MRI. This method effectively reduces aliasing artifacts, enabling high-quality cardiac imaging during exercise.

Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Medical Imaging Physics
  • Signal Processing in MRI

Background:

  • Accelerated MRI acquisition methods reduce scan times by undersampling k-space.
  • Techniques like UNFOLD, SENSE, and SMASH address aliasing artifacts from undersampling.
  • Existing methods have limitations regarding coil sensitivity accuracy and filter selectivity.

Purpose of the Study:

  • To present an adaptive method combining spatial and temporal filtering for MRI artifact reduction.
  • To improve the robustness of sensitivity encoding against imperfect coil sensitivity estimates.
  • To demonstrate the efficacy of adaptive TSENSE for real-time cardiac MRI during stress.

Main Methods:

  • Developed an adaptive spatiotemporal filtering method (adaptive TSENSE).

Related Experiment Videos

  • Combined temporal filtering (UNFOLD) with spatial sensitivity encoding (SENSE).
  • Acquired phase encodes in an interleaved manner to create alternating phase aliasing.

    • Main Results:

    • Adaptive TSENSE achieves a high degree of alias artifact rejection.
    • The method requires less stringent accuracy for coil sensitivities and temporal filters.
    • Demonstrated successful application with an acceleration factor R=2 in real-time cardiac MRI during exercise.

    Conclusions:

    • Combining temporal and spatial filtering offers superior artifact suppression compared to individual methods.
    • Adaptive TSENSE provides a robust solution for accelerated MRI, particularly for dynamic imaging.
    • This technique facilitates high-quality, non-breath-held cardiac MR imaging during physiological stress.