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Line scan echo planar spectroscopic imaging.

K Oshio1, W Kyriakos, R V Mulkern

  • 1Department of Radiology, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA.

Magnetic Resonance in Medicine
|October 12, 2000
PubMed
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A new line scan echo planar spectroscopic imaging (LSEPSI) technique rapidly acquires 2D chemical shift imaging (CSI) data. This method minimizes artifacts and T(1) saturation, enabling faster scans for applications like abdominal fat/water quantitation and temperature monitoring.

Area of Science:

  • Magnetic Resonance Imaging
  • Spectroscopic Imaging
  • Medical Physics

Background:

  • Conventional 2D Chemical Shift Imaging (CSI) methods often face limitations with short repetition times (TR) due to T(1) saturation and motion artifacts.
  • Rapid scanning is crucial for applications requiring timely data acquisition, such as in interventional procedures or dynamic physiological monitoring.

Observation:

  • A novel Line Scan Echo Planar Spectroscopic Imaging (LSEPSI) sequence was developed.
  • This technique utilizes successive "snapshot" 1D CSI acquisitions of individual tissue columns.
  • It effectively avoids T(1) saturation issues inherent in rapid scanning protocols.

Findings:

  • The LSEPSI sequence rapidly produces 2D CSI data with minimal relaxation weighting.
  • The method significantly reduces motion-related artifacts compared to conventional techniques.

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  • It overcomes the T(1) saturation problem associated with short TR periods.

    • Implications:

    • Potential for rapid fat/water spectral quantitation in abdominal imaging.
    • Enables internally referenced temperature monitoring during interventional procedures.
    • Advances the field of rapid spectroscopic imaging for clinical and research applications.