to 4 ml/sec with total volume of 7 to 9 ml. The frame rate of fluoroscopy is 3 to 4 frames/sec. To image the anterior cerebral circulation such as internal and external carotid arteries and its branches, AP, Towne's and lateral views are taken. The petrous part of the temporal bone should be superimposed at the mid or lower orbits when taking the AP/Towne's view. Contrast injection rate is 6 to 7 ml/sec with total volume of contrast at 10 ml. The frame rate of fluoroscopy is 2 to 4 frames/sec. Neck extension can help to navigate into tortous cerival part of the internal carotid artery. At the level of carotid bifurcation, AP and oblique images are taken. At the cavernous (C4) and ophthalmic segments (C6) of the internal carotid artery, Caldwell and lateral views are taken. At the supraclinoid segment (C5-clinoid, C6-ophthalmic, and C7-bifurcation to posterior communicating artery (PCOM) segments), AP view is used to access the terminal branches such as anterior cerebral artery (ACA), middle cerebral artery (MCA) while oblique view (25 to 35 degrees) is used to access the ACA, anterior communicating artery (ACOM), and MCA bifurcations. Lateral view is useful to visualise the PCOM while submentovertical view is useful to project ACOM above the nasal cavity, thus making it easier to access the anatomy of ACOM. Transorbital oblique view is useful to access the MCA anatomy. The anatomy of external carotid artery is access via AP and lateral views. To image the posterior circulation, such as vertebral and basilar arteries, AP, Towne's view, lateral projections near the back of the head and upper part of the neck is taken. In this case, petrous bone should be projected at the bottom or below the orbits to visualise the basilar artery and its branches in AP/Towne's view. The rate of injection is 3 to 5 ml/sec, for a total of 8ml. The fluoroscope will be catching images at a rate of 2 to 4 frames per second. Posterior cerebral artery (PCA) can be seen in AP view. Any activation of primary collateral system (ACOM and PCOM arteries) or secondary collateral system (pial-pial and leptomeningeal-dural) in case of occlusion of internal carotid artery should also be documented. Leptomeningeal collaterals or pial collaterals are the small arterial connections that join the terminal branches of ACAs, MCAs, and PCAs on the surface of the brain. Post-procedural care Manual compression or percutaneous