What diagnostic tools are commonly used to identify arterial narrowing and/or perfusion abnormalities or reduced brain oxygenation?
Various diagnostic tools are commonly used to identify arterial narrowing and/or perfusion abnormalities or reduced brain oxygenation. These different tools include: computed tomography angiography (CTA), magnetic resonance angiography (MRA), and/or digital subtraction angiography (DSA). CTA is used to evaluate arterial narrowing and is usually used to evaluate vasospasm. MRA is used to evaluate perfusion abnormalities and is more sensitive than CTA for evaluating the presence and severity of vasospasm. DSA is used to evaluate reduced brain oxygenation and is the most accurate method for diagnosing vasospasm.