MR imaging of the vessel wall

Area of Science:

• Radiology
• Cardiovascular Imaging
• Biomedical Engineering

Background:

• Thrombosis risk is linked to atherosclerotic plaque composition, not just lumen narrowing.
• Current radiological assessment often focuses on lumen diameter, potentially missing early disease stages.
• High-resolution magnetic resonance imaging (MRI) of the vessel wall offers insights into plaque makeup.

Purpose of the Study:

• To explore the potential of high-resolution MRI for early atherosclerosis detection and characterization.
• To discuss the technical challenges and solutions for effective vessel wall MRI.
• To propose an advanced diagnostic concept for atherosclerotic disease assessment.

Main Methods:

• Utilizing high-resolution MRI with dedicated radiofrequency (RF) coils for vessel wall imaging.
• Employing both external surface phased-array coils and invasive intravascular coils.
• Investigating the use of ultrasmall particles of iron oxide as intravascular contrast agents for macrophage activity.

Main Results:

• High-resolution MRI can provide crucial information on atherosclerotic plaque composition.
• Achieving sufficient spatial resolution and contrast for vessel wall imaging remains a technical challenge.
• Dedicated RF coils and specific contrast agents are key to overcoming these challenges.

Conclusions:

• Advanced MRI techniques, including dedicated RF coils and intravascular contrast agents, are essential for comprehensive atherosclerotic plaque assessment.
• A combination of luminal MR angiography and high-resolution vessel wall MRI could become the gold standard for diagnosing atherosclerosis.
• This approach enables early detection and characterization of vulnerable plaques, improving patient management.