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Related Experiment Videos

Controlled aliasing in volumetric parallel imaging (2D CAIPIRINHA).

Felix A Breuer1, Martin Blaimer, Matthias F Mueller

  • 1University of Würzburg, Department of Experimental Physics 5, Würzburg, Germany. fxbreuer@physik.uni-wuerzburg.de

Magnetic Resonance in Medicine
|January 13, 2006
PubMed
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Controlled Aliasing In Parallel Imaging Results IN Higher Acceleration (CAIPIRINHA) is adapted for 3D imaging. This novel 2D CAIPIRINHA method enhances parallel imaging reconstruction by modifying undersampled phase encoding, improving robustness without special RF pulses.

Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Image Reconstruction
  • Parallel Imaging Techniques

Background:

  • The CAIPIRINHA concept enhances parallel imaging reconstruction by modifying aliasing artifacts during acquisition.
  • This technique has been successfully applied to simultaneous multi-slice imaging (MS CAIPIRINHA).

Purpose of the Study:

  • To extend the CAIPIRINHA concept to 3D imaging, enabling simultaneous data reduction in two spatial dimensions.
  • To develop a 2D CAIPIRINHA method that improves parallel imaging reconstruction without requiring specialized radio frequency (RF) pulses.

Main Methods:

  • The 2D CAIPIRINHA method modifies the phase encoding sampling strategy in undersampled 2D acquisitions.
  • Sampling positions are shifted from their standard locations in the phase encoding scheme.

Related Experiment Videos

  • This approach leverages coil sensitivity variations more effectively in multiple dimensions.

    • Main Results:

    • The 2D CAIPIRINHA method allows for data reduction in two spatial dimensions simultaneously within 3D imaging.
    • It offers a robust parallel imaging reconstruction by optimizing the exploitation of coil sensitivity variations.
    • Unlike MS CAIPIRINHA, this 2D approach does not necessitate the use of special RF pulses.

    Conclusions:

    • The CAIPIRINHA concept is successfully transferred to 3D imaging via a novel 2D CAIPIRINHA sampling strategy.
    • This method provides a more robust parallel imaging reconstruction for 3D MRI by modifying phase encoding.
    • The 2D CAIPIRINHA technique enhances parallel imaging capabilities without requiring advanced RF hardware.