Reliable 5-min real-time MR technique for left-ventricular-wall motion analysis

Area of Science:

• Cardiology
• Medical Imaging
• Diagnostic Techniques

Background:

• Transthoracic echocardiography (TTE) is a standard for assessing left-ventricular-wall motion.
• In some patients, TTE provides insufficient diagnostic quality.
• Alternative imaging modalities are needed for accurate cardiac assessment.

Purpose of the Study:

• To evaluate the accuracy and efficiency of real-time MRI for left-ventricular-wall motion assessment.
• To compare real-time MRI with ECG-gated steady-state free-precession (SSFP) MRI.
• To determine if real-time MRI is a viable alternative to TTE when TTE is inadequate.

Main Methods:

• Twenty-five patients with suboptimal TTE underwent real-time and ECG-gated SSFP MRI on a 1.5-Tesla system.
• Left-ventricular-wall motion was analyzed by three independent observers.
• Preparation, scanning, and total examination times were recorded.

Main Results:

• Real-time MRI demonstrated high agreement with ECG-gated MRI for wall motion assessment (mean kappa coefficient = 0.8).
• All examination stages, including preparation and scanning, were significantly shorter with the real-time approach.
• The overall examination time was reduced using real-time MRI.

Conclusions:

• Real-time MRI provides accurate assessment of left-ventricular-wall motion.
• This method significantly reduces examination time compared to conventional techniques.
• Real-time MRI is a cost-efficient alternative for patients with insufficient echocardiography.