Background: An ambulance equipped with a multimodal CT scanner, a point-of-care laboratory, and telemedicine capabilities (Mobile Stroke Unit, MSU) may facilitate triage of patients directly to the appropriate target hospital and specialized treatment, according to their individual vascular pathology.

Methods: We report a range of scenarios in which prehospital CTA could be relevant in triaging patients to the appropriate target hospital and to the individually required treatment.

Results: Prehospital CTA by use of a MSU allowed to detect large-vessel occlusion of the middle cerebral artery in one patient with ischemic stroke and occlusion of the basilar artery in another, thereby allowing rational triage to comprehensive stroke centers for immediate intra-arterial treatment (Fig.1 a-d). 
	In complementary cases, prehospital imaging not only allowed diagnosis of hemorrhage in one patient and of subarachnoid hemorrhage in another, but also clarified the underlying vascular pathology, which was relevant for subsequent triage decisions (Fig.1 e-h). Stroke management metrics are shown in Table 1. 

Conclusion: Defining the vascular pathology by CTA directly at the emergency site may be beneficial in triaging patients with various cerebrovascular diseases to the appropriate target hospital and specialized treatment.

Prehospital CT Angiography in Acute Stroke Management