Triggered real-time MRI and cardiac applications.

Area of Science:

• Medical Imaging
• Cardiovascular MRI
• Biomedical Engineering

Background:

• Real-time interactive MRI is increasingly preferred for cardiac applications.
• A key limitation is inaccurate slice registration during free-breathing acquisitions.
• This hinders precise assessment of cardiac function and blood flow.

Purpose of the Study:

• To introduce a simple "triggered real-time" imaging approach.
• To enable synchronized and accurately registered real-time cardiac MRI movie loops.
• To overcome free-breathing limitations in cardiac MRI.

Main Methods:

• Development of a "triggered real-time" imaging sequence.
• Acquisition of cardiac MRI data during short, patient-triggered breathholds.
• Utilizing synchronized imaging for enhanced slice registration.

Main Results:

• Demonstrated successful acquisition of synchronized real-time cardiac MRI movie loops.
• Achieved accurate slice registration during short breathholds.
• Initial in vivo results show potential for complete 4D ventricular function assessment and resolved flow imaging.

Conclusions:

• The proposed triggered real-time MRI technique effectively addresses slice registration inaccuracies.
• This method facilitates high-quality cardiac MRI during free-breathing.
• Enables comprehensive 4D cardiac function and flow assessment with improved accuracy.