Cerebral Angiogram (CT) PRINT Version: 1.0Last updated: 2/20/2021What changed: N/A History: aneurysm, arteriovenous malformation, vasospasm, vasculitis, dural arteriovenous fistula. CTA Head. HEAD ANGIGORAM LocalizerFrontal and Lateral PhaseArterial InstructionsDo not swallow Contrast agent350-370 Contrast Volume/ rate80-100 mL @ 4-5 mL / sec Contrast DelayBolus track just above foramen magnum to carotids / verts CoverageC2-Vertex AngulationNone Scan typeHelical kVp110-130 Target CTDIvol (mGy)< 15 Max CTDIvol (mGy)20 Max scan time (sec)20 Pitch0.9-1.5:1 DFOV22-24 SEND TO PACS Ax 0.5-0.625 mm Overlapped Standard MIP Ax 5 x 1 mm: foramen magnum to vertex, supraorbitomeatal alignment MIP Sag Head 5 x 1 mm: Bone to Bone, midline alignment MIP Cor Head 5 x 1 mm: Basilar artery / clivus alignment 3D VRT: COW with top and side of skull cut away Feedback
