Inclusion Criteria1. Subject has suspected or proven ischemic stroke or brain ischemia.
2. Subject requires diagnostic and/or interventional imaging in the neuro-angiography suite.
3. Subject or subject's legally authorized representative has signed an institutionally approved research informed consent form.
4. Subject ≥ 18 years old.
Exclusion Criteria1. Subject or subject's legally authorized representative is unable or unwilling to consent to the study.
2. Subject with documented contrast medium injection contraindication due to severe kidney disease or allergy.