Interobserver reliability of computed tomography angiography in the assessment of ruptured intracranial aneurysm and impact on patient management

Table 1 Imaging features considered in the management of ruptured intracranial aneurysms

	Endovascular therapy	Surgical management
Non-contrast computed tomography	Absence of parenchymal hematoma	Presence of intra-parenchymal hematoma
Aneurysm characters	Posterior circulation aneurysms	Middle cerebral and pericallosal arteries aneurysm
	Small aneurysm neck < 4 mm	Aneurysm diameter > 15 mm Wide neck aneurysm > 4 mm
	Aneurysm diameter < 15 mm	Abnormal configuration
	Unilobar configuration	Aneurysmal sac incorporating arterial branches
	Multiple aneurysms	Presence of intraluminal thrombus
	Calcification located at the aneurysm neck
Perianeurysmal findings	Presence of vasospasm	Vascular variants interfere with endovascular management