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Differences in null points between the left and right ventricles in contrast-enhanced inversion recovery MR imaging

Yasuo Amano1, Tatsuo Kumazaki

  • 1Department of Radiology, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo 113-8603, Japan. yas-amano@nifty.com

Computerized Medical Imaging and Graphics : the Official Journal of the Computerized Medical Imaging Society
|May 23, 2006
PubMed

Insights

Delayed contrast-enhanced MRI can detect right ventricular (RV) myocardial damage. Shorter inversion times may be needed for accurate RV null point assessment in cardiac MRI, especially in arrhythmogenic right ventricular cardiomyopathy.

Area of Science:

  • Cardiovascular Magnetic Resonance Imaging
  • Cardiac Electrophysiology
  • Medical Imaging Techniques

Background:

  • Delayed contrast-enhanced inversion recovery (IR) gradient-echo MRI is used for cardiac diseases.
  • Previous studies suggest its utility in arrhythmogenic right ventricular cardiomyopathy (ARVC).
  • Right ventricular (RV) myocardium null points on IR MRI are not well-established.

Purpose of the Study:

  • To evaluate RV and left ventricular (LV) myocardial null points using IR fast multi-shot echo-planar imaging (Look-Locker sequence).
  • To assess the significance of RV myocardial signal intensity in delayed contrast-enhanced MRI.
  • To determine optimal imaging parameters for RV late enhancement detection.

Main Methods:

  • Utilized IR fast multi-shot echo-planar imaging (Look-Locker sequence) in 26 cardiac patients.
  • Assessed null points of RV and LV myocardium.
  • Analyzed RV and LV myocardial signal intensities on delayed contrast-enhanced MR images.

Main Results:

  • RV myocardial null points were shorter than LV null points in 9 out of 26 patients.
  • Significantly higher RV myocardial signals were observed compared to LV signals.
  • This indicates potential underestimation of RV myocardial late enhancement.

Conclusions:

  • RV myocardial null points differ from LV, requiring specific attention during IR MRI.
  • Delayed contrast-enhanced MRI may necessitate shorter inversion times for accurate RV assessment.
  • Further research is needed to optimize RV myocardial imaging protocols.

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