Results 161 to 170 of about 8,255 (190)
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[Transcranial Doppler ultrasound].
Canadian Association of Radiologists journal = Journal l'Association canadienne des radiologistes, 1992Over the last decade, transcranial Doppler examination of the cerebral vessels has been made possible by the development of a high-intensity, low-frequency (2 MHz) pulse probe. The middle, the anterior and the posterior cerebral arteries, the cavernous portion of the carotid artery and the basilar artery can thus be easily studied transtemporally or ...
S, Fontaine +3 more
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Better With Ultrasound: Transcranial Doppler.
Chest, 2020Transcranial Doppler (TCD) ultrasound is a noninvasive method of obtaining bedside neurologic information that can supplement the physical examination. In critical care, this can be of particular value in patients who are unconscious with an equivocal neurologic examination because TCD findings can help the physician in decisions related to more ...
Vincent I, Lau +7 more
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Detection of Microembolic Signals with Transcranial Doppler Ultrasound
2006Detection of microembolic signals (MES) with transcranial Doppler was introduced in the late 1980s; several animal and in vitro models reported a high sensitivity and specificity with this technique. Monitoring for MES in various patient groups has provided valuable insights on stroke pathophysiology, although its clinical value remains a matter of ...
Georgiadis D, Siebler M
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Transcranial Doppler Ultrasound: Physical Principles
2021This chapter describes the physical principles underlying transcranial Doppler ultrasound. The propagation of ultrasound through tissue is described. The principles of continuous wave Doppler, pulsed wave Doppler, duplex scanning, colour flow imaging and power Doppler imaging are introduced.
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Transcranial Doppler Ultrasound and Neurophysiology
2016Abstract Neurologists who care for patients with a critical neurologic illness commonly order and interpret neuroimaging studies, particularly computed tomography (CT) angiograms and CT perfusion, magnetic resonance imaging (MRI), magnetic resonance angiography (MRA), and cerebral angiography.
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Transcranial Doppler Ultrasound in Children with Sturge-Weber Syndrome
Journal of Child Neurology, 2007Transcranial Doppler ultrasound is a noninvasive vascular assessment technique proved useful in the management of pediatric disorders predisposed to stroke and may have similar utility for Sturge-Weber syndrome. Eight children with Sturge-Weber syndrome had velocities measured in the major cerebral arteries via the Stroke Prevention Trial in Sickle ...
Lori C, Jordan +4 more
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Evaluation of cerebral AVM's using transcranial Doppler ultrasound
Journal of Neurosurgery, 1986✓Blood flow velocities in basal cerebral arteries were recorded noninvasively in 28 patients with cerebral arteriovenous malformations (AVM's) and were correlated with the angiographic findings. In normal arteries remote from the AVM, flow velocities ranged from 44 to 94 cm/sec (median 65 cm/sec) with pulsatility indexes from 0.65 to 1.10 (median 0.87).
K F, Lindegaard +3 more
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Validation of transcranial Doppler ultrasound with a stereotactic neurosurgical technique
Journal of Neurosurgery, 1995✓ Vessel identification during a transcranial Doppler (TCD) ultrasound examination is usually based on well-established inferential criteria without confirmation by imaging. Part of a routine study involves taking measurements from the M1 segment of the middle cerebral artery (MCA) and the A1 segment of the anterior cerebral artery (ACA) at the points ...
L H, Monsein +4 more
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Transcranial ultrafast ultrasound Doppler imaging: A phantom study
UltrasonicsUltrafast ultrasound Doppler imaging facilitates the assessment of cerebral hemodynamics with high spatio-temporal resolution. However, the significant acoustic impedance mismatch between the skull and soft tissue results in phase aberrations, which can compromise the quality of transcranial imaging and introduce biases in velocity and direction ...
Jiangjin Zhou +6 more
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Transcranial Doppler ultrasound in children with stroke and cerebrovascular disorders
Current Opinion in Pediatrics, 2015A major advantage of transcranial Doppler (TCD) ultrasound is its ability to measure cerebral hemodynamics noninvasively at the patient's bedside. This article summarizes the basic physics and variables used during TCD, recent pediatric data published on the use of TCD in stroke and cerebrovascular disorders and how it may impact diagnosis and ...
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