Coronary flow quantification by Fourier velocity encoded MRI

Area of Science:

• Cardiovascular imaging
• Medical physics
• Magnetic Resonance Imaging (MRI)

Background:

• Magnetic resonance (MR) techniques offer potential for non-invasive assessment of coronary stenosis significance.
• Accurate determination of coronary blood flow and vessel area remains a challenge in MR imaging.
• High spatial and temporal resolution are critical for reliable coronary artery flow profiling.

Purpose of the Study:

• To evaluate the feasibility of measuring coronary blood flow using fast MR techniques.
• To address challenges in accurate flow and vessel area determination for coronary stenosis assessment.
• To introduce and validate Fourier velocity encoding (FVE) for enhanced flow quantification.

Main Methods:

• Implementation of Fourier velocity encoding (FVE) with a reduced number of encoding steps.
• Conducted simulations and in-vitro experiments to assess FVE performance for flow quantification.
• Performed initial in-vivo volunteer measurements to evaluate the technique's applicability.

Main Results:

• Demonstrated the benefits of FVE for accurate flow quantification through simulations and in-vitro studies.
• Initial volunteer measurements indicate the potential of FVE for in-vivo application in coronary arteries.
• The FVE technique shows promise in overcoming current limitations in MR-based coronary flow assessment.

Conclusions:

• Fourier velocity encoding (FVE) is a promising technique for improving the accuracy of coronary blood flow measurements using fast MR.
• This method holds potential for non-invasively assessing the significance of coronary stenosis.
• Further in-vivo validation is supported by initial positive results in volunteer studies.