Fig. 1.

Flowchart of the literature search and study selection of ICH patients, following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines (SAH, subarachnoid haemorrhage; TBI, traumatic brain injury). *Records excluded (n = 85) (SAH (n = 27), TBI (n = 2), case studies (n = 10), ischemic stroke (n = 6), no 4D-CTA (n = 14), no DSA (n = 14), review papers (n = 7), manuscript response letters (n = 1), non-neurological condition (n = 2), non-English (n = 2)). ^#Records excluded (n = 22): not performing DSA (n = 8) or 4D-CTA (n = 7), with further 5 studies failing to use 4D-CTA and DSA as part of the patient investigations. One study was a service audit, with another study presenting only case studies