Results 191 to 200 of about 621,898 (227)
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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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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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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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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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A New Method for Fixation of Probes for Transcranial Doppler Ultrasound
Journal of Neuroimaging, 1997Although monitoring of blood velocity in the cerebral arteries with transcranial Doppler ultrasound is standard practice, methods for fixation of the ultrasound probe to the skull continue to impose a technical challenge. This report describes a novel method of probe fixation in which an inexpensive polymer block is custom–made for each patient to hold
C A, Giller, A M, Giller
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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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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 for cerebral perfusion.
Acta physiologica Scandinavica. Supplementum, 1995By providing a non-invasive method for continuous display of mean flow velocity (Vmean) in the cerebral arteries, transcranial Doppler (TCD) ultrasound supplements evaluation of cerebral perfusion. Dynamic exercise increases middle cerebral artery (MCA) Vmean from approximately 55 to 65 cm s-1 dependent on work rate, and even more when corrected for ...
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