Kappelhof M, et al. - Researchers attempted to investigate the accuracy of CTA for differentiating pseudo-occlusion from true occlusion of the extracranial ICA. They enrolled all patients from the Multicenter Randomized Clinical Trial of Endovascular Treatment for Acute Ischemic Stroke in the Netherlands (MR CLEAN) with an apparent ICA occlusion on CTA and available DSA images. In this analysis, two independent observers classified CTA images as atherosclerotic cause (occlusion/high-grade stenosis), dissection, or suspected pseudo-occlusion. Results of this study suggested that extracranial ICA pseudo-occlusions could be differentiated from true carotid occlusions on CTA.