3-Tesla MRI for the evaluation of myocardial viability: a comparative study with 1.5-Tesla MRI

Area of Science:

• Cardiovascular Imaging
• Magnetic Resonance Imaging
• Myocardial Viability Assessment

Background:

• Cardiac magnetic resonance imaging (MRI) is crucial for evaluating myocardial viability.
• Comparing different magnetic field strengths (Tesla) is essential for optimizing imaging protocols.

Purpose of the Study:

• To compare the diagnostic performance of 3-Tesla (3-T) and 1.5-Tesla (1.5-T) cardiac MRI for myocardial viability assessment.
• To evaluate functional and viability parameters using identical imaging protocols across both magnetic field strengths.

Main Methods:

• Thirty-five patients underwent both 3-T and 1.5-T cardiac MRI post-coronary angioplasty.
• Standard viability protocol: cine-MR, contrast-enhanced perfusion, and delayed enhancement (DE).
• Image quality assessed via signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR).

Main Results:

• No significant differences in functional and viability parameters between 3-T and 1.5-T MRI.
• 3-T MRI demonstrated a 61.3% higher myocardial SNR compared to 1.5-T MRI.
• DE images showed significantly increased SNR (387.8%) and CNR (330%) with 3-T MRI, indicating better detection of myocardial infarction.

Conclusions:

• 3-T cardiac MRI shows high concordance with 1.5-T MRI for functional and viability assessments.
• 3-T MRI offers enhanced visualization of damaged myocardium, particularly in delayed enhancement imaging.
• The findings support the use of 3-T MRI for improved myocardial viability assessment.