To review carotid dissection,
the imaging findings on CT,
MRI and angiography and to show examples.
The carotid dissection consists in a leakage of blood to the middle layer through an intimal flap of the arterial wall or,
media haemorrhage from vasa vasorum.
Blood usually enters the media at the site of intimal injury,
and the dissection usually extends cranially in the same direction as the bloodstream. The intramural hematoma usually compresses the true lumen of the artery and causes enlargement of the external diameter of the artery. The aetiology can be traumatic (blunt...
Imaging findings OR Procedure details
Multidetector computed tomography (MDCT) angiography allows multiplanar reconstructions and volume rendering images and it is noninvasive.
The signs found in carotid dissection are: A narrow eccentric lumen, Fig. 1 Fig. 2 crescent-shaped mural thickening, Fig. 3 enlargement of the overall vessel diameter, Fig. 4 hypodense line separating both lumens (intimal flap), Fig. 5 stenosis, Fig. 2 occlusion, aneurysm formation, thin rim-like enhancement. MRI allows a wide variety of sequences and...
The carotid dissection is a major cause of stroke in young patients that may result in significant morbidity without treatment (risk of stroke and long-term sequelae). It is important for radiologist be acquainted with findings and sources of error to achieve the correct diagnosis with non-invasive techniques.
Comparison of Multidetector CT Angiography ang MR Imaging of cervical artery dissection.
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