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Elucidation of the dynamic nature of plaque progression has important implications for clinicians. The present study sought to establish an in vivo method for visualizing structural changes in carotid plaques. Three-dimensional reconstruction of parallel two-dimensional gray-scale B-mode ultrasound combined with power-mode examination of 38 carotid artery(More)
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)
The application of different color-coding techniques in transcranial color-coded duplex sonography (TCCD) was assessed for detection and measurement of the size of intracranial aneurysms. Thirty-two consecutively examined patients with 36 angiographically verified cerebral aneurysms underwent TCCD with color Doppler flow imaging (CDFI), power Doppler(More)
Power Doppler is a new ultrasound technique based on the visualization of the Doppler power spectrum. In 22 patients with different lesions of brain-supplying vessels the results of power Doppler ultrasound were compared with those of digital subtraction angiography and conventional color Doppler ultrasound. In patients with intracranial high-degree(More)
BACKGROUND AND PURPOSE Lowering of serum cholesterol levels with HMG-CoA reductase inhibitors (statins) slowed the progression of atherosclerosis in the carotid arteries in several clinical trials using carotid artery intima media thickness as primary outcome measure. Whereas conventional ultrasonography is limited to thin 2-dimensional image planes,(More)
The main limitation of transcranial colour-coded duplex sonography (TCCD) is the inadequate acoustic window, which prevents transtemporal identification of the basal cerebral arteries in up to 30% of cases, especially in the elderly. TCCD with different colour-coding techniques, including frequency-based colour-flow (CFD) or power (PD) Doppler sonography,(More)
Since the introduction of contrast media, transcranial colour-coded sonography (TCCS) has become increasingly important for examination of the intracranial vessels. However, the widely practised bolus injection of these agents leads to initial blooming artefacts and thereafter the level of contrast enhancement decreases rapidly, reducing the effective time(More)
Therapeutic radiation can lead to damage of arterial walls. In the present investigation, we studied prospectively 16 patients without pre-existing vascular disease (13 males, three females; mean age = 59.75 ± 11.9 years) who had undergone surgery and post-operative radiation therapy (cumulative dose = 56.2 ± 10.2 Gy) for the treatment of carcinoma of the(More)
Because examinations of the intracranial vessels using conventional transcranial color-coded sonography (TCCS) lack spatial orientation and reproducibility, development of a three-dimensional (3-D) imaging technique is required. Three patients with middle cerebral artery (MCA) stenosis, three with suspected intracranial aneurysm, two with vascular(More)