Interleaved spiral cine coronary artery velocity mapping

Area of Science:

• Cardiovascular Magnetic Resonance Imaging
• Flow Dynamics
• Medical Imaging Techniques

Background:

• Assessing coronary blood flow is crucial for diagnosing and managing cardiovascular diseases.
• Conventional magnetic resonance imaging (MRI) techniques for coronary flow assessment can be limited by scan time and motion artifacts.

Purpose of the Study:

• To evaluate the feasibility and reproducibility of navigator-echo controlled interleaved spiral cine magnetic resonance imaging for acquiring coronary artery velocity maps.
• To assess the efficiency and scan time of this novel spiral technique compared to conventional methods.

Main Methods:

• Acquisition of navigator-echo controlled interleaved spiral cine coronary-artery velocity maps in eight free-breathing volunteers.
• Utilized spiral k-space coverage for improved efficiency over spin-warp techniques.
• Performed repeat scans to assess reproducibility of peak and mean velocities.

Main Results:

• Achieved good quality data in all subjects, clearly demonstrating phasic coronary flow.
• Mean scan time for 256 x 256 pixel-matrix studies was 94 seconds, significantly faster than conventional methods.
• Repeat scans showed high reproducibility with no significant differences in peak or mean velocities.

Conclusions:

• Navigator-echo controlled interleaved spiral cine MRI is an efficient and reproducible technique for coronary artery velocity mapping.
• This method holds potential for improved assessment of coronary blood flow and flow reserve.
• The technique offers a promising advancement in cardiovascular MRI for clinical applications.