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Imaging of Cerebral Microbleeds
1Institute for Diagnostic and Interventional Neuroradiology, University Hospital Carl Gustav Carus, Fetscherstr. 74, 01307, Dresden, Germany. jennifer.linn@uniklinikum-dresden.de.
Abstract:
Cerebral microbleeds (CMBs) are defined as small, rounded, or ovoid, homogeneous hypointense lesions on T2*-weighted gradient-echo and other susceptibility-sensitive magnetic resonance imaging (MRI) sequences. They must be differentiated from other causes of focal hypointensities on these sequences. Although CMBs can be caused by a variety of diseases, they are most frequently associated with different forms of cerebral small vessel diseases. This review summarizes the MRI characteristics of CMBs including methodological considerations, as well as prevalence, differential diagnosis, mimics, and clinical relevance of CMBs.
Insights
Cerebral microbleeds (CMBs) are small MRI lesions often linked to small vessel diseases. This review covers their characteristics, diagnosis, and clinical significance.
Area of Science:
- Neuroradiology
- Neurology
- Vascular Neurology
Background:
- Cerebral microbleeds (CMBs) are small, hypointense lesions detected on susceptibility-sensitive MRI.
- CMBs are frequently associated with cerebral small vessel diseases.
- Accurate differentiation from other causes of focal hypointensities is crucial.
Purpose of the Study:
- To review the MRI characteristics of cerebral microbleeds.
- To discuss methodological considerations for CMB detection.
- To summarize prevalence, differential diagnosis, mimics, and clinical relevance of CMBs.
Main Methods:
- Literature review of studies on cerebral microbleeds.
- Analysis of MRI sequences for CMB detection (T2*-weighted, GRE).
- Synthesis of information on CMBs' etiology, imaging features, and clinical impact.
Main Results:
- CMBs appear as small, homogeneous hypointensities on specific MRI sequences.
- Cerebral small vessel diseases are the most common cause of CMBs.
- Differential diagnosis includes other causes of focal hypointensities and mimics.
Conclusions:
- Understanding CMB MRI characteristics is vital for accurate diagnosis.
- CMBs have significant clinical relevance, particularly in small vessel diseases.
- This review provides a comprehensive overview for clinicians and researchers.
