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(Stroke. 2004;35:1107.)
© 2004 American Heart Association, Inc.
Original Contributions |
From Department of Neurology (G.S., K.M.-W., G.B.), University Hospital Schleswig-Holstein, Campus Lübeck, Germany; and Institute for Signal Processing (D.H., D.T., T.A.), University of Lübeck, Germany.
Correspondence to Dr Günter Seidel, University Hospital Schleswig-Holstein, Campus Lübeck, Department of Neurology, Ratzeburger Allee 160 D-23538 Lübeck, Germany. E-mail seidel_g{at}neuro.mu-luebeck.de
Background and Purpose Initial reports indicate that transcranial harmonic imaging after ultrasound contrast agent bolus injection (BHI) can detect cerebral perfusion deficits in acute ischemic stroke. We evaluated parametric images of the bolus washout kinetics.
Methods Twenty-three patients with acute internal carotid artery infarction were investigated with perfusion harmonic imaging after SonoVue bolus injection
40 hour after the onset of symptoms. The findings were compared with those of cranial computed tomography (CCT) and clinical course 4 months after stroke.
Results Images of pixel-wise peak intensity (PPI) and time to peak intensity could be calculated for all patients. Spearman rank correlations of r=0.772 (P<0.001) and r=0.572 (P=0.008) between area of PPI signal decrease and area of infarction in the follow-up CCT as well as outcome after 4 months were obtained, respectively.
Conclusions In the early phase of acute ischemic stroke, BHI after SonoVue bolus injection is a useful ultrasound tool for analyzing cerebral perfusion deficits at the patients bedside. BHI data correlate with the definite area of infarction and outcome after 4 months.
Key Words: ultrasonography stroke contrast media
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