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Related Experiment Videos

Cardiac magnetic resonance imaging using an open 0.35 T system.

Hans-Martin Klein1, Werner Meyners, Benjamin Neeb

  • 1Radiological Center, Ev. Jung-Stilling-Krankenhaus Siegen, Wichernstrasse, Siegen, Germany. hans-martin.klein@diakonie-siegen.de

Journal of Computer Assisted Tomography
|June 1, 2007
PubMed
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Open MRI systems with lower magnetic field strength are suitable for cardiac function imaging. However, higher field strengths are necessary for effective perfusion and late enhancement imaging in cardiac MRI.

Area of Science:

  • Cardiovascular Imaging
  • Medical Physics
  • Radiology

Background:

  • Cardiac magnetic resonance imaging (MRI) is crucial for diagnosing heart conditions.
  • Open MRI systems offer advantages for specific patient populations, such as the claustrophobic or obese.
  • Evaluating the efficacy of lower-field open MRI systems for cardiac assessment is important.

Purpose of the Study:

  • To assess the diagnostic capabilities of a 0.35 Tesla (T) open magnetic resonance system for cardiac imaging.
  • To determine the image quality and signal-to-noise ratio for different cardiac MRI sequences on this system.

Main Methods:

  • Eleven patients underwent cardiac MRI using a 0.35 T open system.
  • Cine true fast imaging with steady-state precession sequences were used for myocardial function assessment.

Related Experiment Videos

  • T1-weighted gradient echo and inversion recovery-prepared fast gradient echo techniques were employed for perfusion and late enhancement imaging, respectively.

    • Main Results:

    • Functional cardiac imaging achieved an average quality score of 1.65.
    • Perfusion and late enhancement imaging yielded average scores of 2.25 and 2.6, respectively.
    • Signal-noise ratios were 50.6 for functional, 91.8 for perfusion, and 33.2 for late enhancement imaging.

    Conclusions:

    • Lower-field open MRI (0.35 T) is adequate for assessing cardiac function.
    • Higher magnetic field strengths are required for optimal perfusion and late enhancement (viability) imaging.
    • Open low-field cardiac MRI presents a valuable alternative for patients who cannot tolerate standard MRI scanners.