Visualization of Collateral Supply by Two-coil Continuous Arterial Spin Labeling
Mller H, Mildner T, Preul C, Zimmer C
Max Planck Institute for Human Cognitive and Brain Sciences, University Hospital Mnster
Two patients were investigated by continuous arterial spin labeling with separate coils for labeling and imaging to evaluate the potential for perfusion territory mapping. Labeling was restricted to either the left- or right-sided carotid. No differences between both hemispheres were observed in patient 1 with asymptomatic carotid stenosis. Similarly, signal changes were predominantly observed in the labeled hemisphere in patient 2, who subsequently underwent embolization coil occlusion of the left internal carotid artery. After the intervention, perfusion contrast was created symmetrically in both hemispheres upon labeling the right side, verifying sufficient collateral supply in agreement with balloon occlusion testing.