What imaging features can help distinguish between an acute versus chronic cervical internal carotid occlusion?
If there are signs of underlying atherosclerotic disease, are there signs to differentiate acute on chronic occlusion from chronic complete occlusion?
Answer from: at Community Practice
Distinguishing between acute and chronic cervical ICA occlusion is often challenging, but CTA and CTP can offer helpful clues in assessing lesion acuity.
On CTA, contrast enhancement along the vessel wall at the site of occlusion, sometimes referred to as the "ring sign," may suggest an acute throm...