Vulnerable plaque detection by 3.0 tesla magnetic resonance imaging

Area of Science:

• Vascular Imaging
• Cardiovascular Research
• Medical Technology

Background:

• Carotid atherosclerosis poses a significant risk for stroke.
• Accurate in vivo imaging of plaque composition is crucial for risk stratification.
• Magnetic Resonance Imaging (MRI) is a key non-invasive tool for evaluating carotid arteries.

Observation:

• A 76-year-old male underwent 3.0 T MRI carotid protocol before endarterectomy.
• Histology of the carotid plaque was compared with in vivo MRI findings.
• Both 1.5 T and 3.0 T MRI protocols utilized multicontrast bright and black blood imaging.

Findings:

• 3.0 T MRI provided enhanced visualization of complex atherosclerotic plaque, including lipid pools, calcification, and fibrous caps.
• Higher signal-to-noise (SNR) and contrast-to-noise (CNR) ratios were observed at 3.0 T compared to 1.5 T.
• Macrophages within plaque shoulders were detected at 3.0 T, correlating with T2W hyperintensities, but not at 1.5 T.

Implications:

• 3.0 T multicontrast MRI offers improved detection and characterization of complex atherosclerotic plaque.
• Higher magnetic field strength in MRI enhances diagnostic capabilities for carotid artery disease.
• Further research is warranted to fully elucidate contrast mechanisms at 3.0 T for plaque imaging.