Internal carotid artery dissection: MR imaging features and clinical-radiologic correlation

Area of Science:

• Neurology
• Radiology
• Vascular Imaging

Background:

• Internal and carotid artery dissection (ICAD) is a significant cause of stroke, particularly in younger individuals.
• Accurate and timely diagnosis of ICAD is crucial for appropriate management and prevention of complications.

Purpose of the Study:

• To evaluate the diagnostic utility and sensitivity of magnetic resonance (MR) imaging for ICAD.
• To compare MR imaging findings with other imaging modalities and clinical presentations.
• To identify potential predisposing anatomical factors for ICAD.

Main Methods:

• Retrospective analysis of 31 patients diagnosed with ICAD.
• All patients underwent Doppler sonography; 15 had additional angiographic studies.
• MR imaging was performed within 2-40 days post-symptom onset.

Main Results:

• T1-weighted fat-suppressed MR images accurately depicted intramural hematoma in all internal carotid artery (ICA) dissections.
• Kinking or coiling of the ICA was observed in 29% of patients.
• MR imaging demonstrated characteristic findings of ICAD in a majority of cases, outperforming other modalities.

Conclusions:

• MR imaging is the most accurate modality for demonstrating ICAD.
• The prevalence of kinking and coiling in the carotid artery suggests these may be predisposing factors for dissection.