Phase-sensitive black-blood coronary vessel wall imaging

Area of Science:

• Cardiovascular Imaging
• Magnetic Resonance Imaging
• Medical Diagnostics

Background:

• Black-blood MRI is crucial for noninvasive assessment of coronary artery atherosclerosis and arterial remodeling.
• Current dual-inversion recovery methods face challenges in achieving optimal contrast and have limited imaging windows due to motion and blood signal nulling.
• Imaging atherosclerosis requires high volumetric coverage across multiple coronary artery levels, often increasing scan times.

Purpose of the Study:

• To develop and validate a novel multislice black-blood coronary vessel wall imaging technique.
• To overcome limitations of current methods regarding contrast, scan time, and motion sensitivity.
• To enable efficient, quantitative assessment of coronary atherosclerosis in a single breath hold.

Main Methods:

• Extension of phase-sensitive inversion recovery (PSIR) to phase-sensitive dual-inversion recovery (PS-DIR).
• Integration of PS-DIR with spiral imaging techniques.
• Relaxation of constraints related to blood signal nulling time and myocardial motion gating.

Main Results:

• Achieved multislice black-blood coronary vessel wall imaging within a single breath hold.
• Demonstrated enhanced tissue-tissue contrast and reduced sensitivity to blood signal nulling time.
• Enabled efficient volumetric coverage for comprehensive assessment of coronary atherosclerosis.

Conclusions:

• The novel PS-DIR spiral technique significantly improves efficiency and feasibility of black-blood coronary MRI.
• This method facilitates quantitative, noninvasive assessment of coronary atherosclerosis and arterial remodeling.
• The technique holds promise for routine clinical application in cardiovascular diagnostics.