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Temporary balloon occlusion (TBO) test protocol for treatment of large and giant unclippable aneurysms. BP, blood pressure; BPG, bypass graft; CBF, cerebral blood flow; CT, computed tomography; ICA, internal carotid artery; MRI, magnetic resonance imaging; PBO, permanent balloon occlusion; PVO, parent vessel occlusion; SPECT, single-photon emission computed tomography; TcHMPAO, technetium hexylmethylpropylene amineoxine. (Reprinted with permission of Mayfield Clinic.)
