Craig A. Morgenstern

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Three-dimensional (3D) ultrasound angiography was performed to diagnose carotid artery atherosclerosis. Thirty-five patients (15 women, 20 men) with a history of cerebrovascular disease were examined using conventional color-coded Doppler ultrasound and 3D ultrasound angiography. Carotid stenosis was initially diagnosed using continuous-wave Doppler(More)
Moyamoya syndrome is characterized by the reticulated collateralization of the intracranial vasculature distal to an occlusion of proximal intracranial vessels. In the present study this pathology was visualized in 2 patients, aged 29 and 32 years, using transcranial color Doppler imaging (TCDI). Digital subtraction angiography in both patients revealed(More)
This paper is concerned with the design and performance of coloration neighborhood search (CNS) algorithms for the general graph coloring problem. A coloration neighborhood is an implicit mapping F : II-+ 25 where H is the set of all colorations of a graph, G = (V,E). We require that F(C) be easily enumerable and, ideally, we would like to be able to choose(More)
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