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Three-Dimensional High-Resolution Magnetic Resonance Imaging for the Assessment of Cervical Artery Dissection
Xianjin Zhu1, Yi Shan2,3, Runcai Guo4
1Department of Neurology, Beijing Friendship Hospital, Capital Medical University, Beijing, China.
Insights
Three-dimensional high-resolution MRI (3D HRMRI) effectively detects signs of cervical artery dissection (CAD), including intramural hematomas and intimal flaps. This non-invasive imaging tool offers high sensitivity and specificity for diagnosing CAD.
Area of Science:
- Radiology
- Vascular Imaging
- Neurology
Background:
- Diagnosing cervical artery dissection (CAD) presents challenges with current radiographic criteria.
- Accurate and timely diagnosis of CAD is crucial for effective patient management.
Purpose of the Study:
- To evaluate the diagnostic value of three-dimensional high-resolution magnetic resonance imaging (3D HRMRI) for detecting signs of CAD.
- To assess the sensitivity and specificity of 3D HRMRI in identifying specific CAD features.
Main Methods:
- Retrospective analysis of 14 patients diagnosed with 16 CADs between January 2016 and January 2021.
- Assessment of dissection signs on 3D HRMRI: intramural hematomas, intimal flap, double lumen, intraluminal thrombus.
- Quantification of dissection length, intramural hematoma thickness, and outer contour dilation percentage.
Main Results:
- 3D HRMRI detected intramural hematomas in 81.3% of lesions with 100% sensitivity and specificity.
- Intimal flaps were identified in 56.3% of lesions (64.3% sensitivity, 88.9% specificity).
- Double lumen and intraluminal thrombus signs were observed in 25% of lesions, both with 80% sensitivity and 100% specificity.
Conclusions:
- 3D HRMRI is a highly sensitive and specific non-invasive tool for detecting key signs of cervical artery dissection.
- The imaging modality aids in the definitive diagnosis of CAD, including intramural hematomas, intimal flaps, double lumens, and intraluminal thrombi.
- 3D HRMRI offers significant value in the diagnosis and management of patients with cervical artery dissection.
Background And Purpose:
Diagnosing cervical artery dissection (CAD) is still a challenge based on the current radiographic criteria. This study aimed to assess the value of three-dimensional high-resolution magnetic resonance imaging (3D HRMRI) in the detection of the signs of CAD and its diagnosis.
Materials And Methods:
Patients with CAD from January 2016 to January 2021 were recruited from our 3D HRMRI database. The signs of dissection (intramural hematomas, intimal flap, double lumen), length and location of the dissection, thickness of the intramural hematoma, intraluminal thrombus, and percentage of dilation of the outer contour of the dissection on 3D HRMRI were assessed.
Results:
Fourteen patients with 16 CADs, including 12 carotid CADs and 4 vertebral CADs, were finally diagnosed in this study. On 3D HRMRI, intramural hematomas were detected in 13/16 (81.3%) lesions with high sensitivity (100%) and high specificity (100%). Intimal flaps were found in 9/16 (56.3%) lesions with moderate sensitivity (64.3%) and high specificity (88.9%). Double lumen signs were observed in 4/16 (25.0%) lesions with high sensitivity (80.0%) and high specificity (100%). In addition, concomitant intraluminal thrombus were detected in 4/16 (25.0%) lesions with high sensitivity (80.0%) and high specificity (100%). The mean length of dissection was (25.1 ± 13.7) mm. The mean thickness of the intramural hematoma was (4.3 ± 2.3) mm. The mean percentage of dilation for the outer contour of the dissection was (151.3 ± 28.6)%.
Conclusion:
The 3D HRMRI enables detection of the dissecting signs, such as intramural hematoma, intimal flap, double lumen, and intraluminal thrombus with high sensitivity and specificity, suggesting a useful, and non-invasive tool for definitively diagnosing CAD.
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