Results 151 to 160 of about 8,166 (197)

Transcranial Doppler ultrasound

Neurology, 1990
Summary and critique. Advantages of method. TCD is a noninvasive test effective in monitoring blood velocities in large intracranial arteries. It uses small, potentially portable, relatively inexpensive equipment. The test can be repeated and therefore allows the detection of changes over time and after various physiologic studies or pharmacologie ...
L R, Caplan, L M, Brass, L D, DeWitt, R J, Adams, C, Gomez, S, Otis, L R, Weschler, G M, von Reutern   +7 more
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Transcranial Doppler Ultrasound and Magnetoencephalography in Migraine

Journal of Neuroimaging, 1993
Eighty subjects‐30 migraineurs during the attack, 30 patients in the interictal period, and 20 healthy volunteers‐were studied using two technologies for functional assessment: transcranial Doppler ultrasound and magnetoencephalography. Transcranial Doppler studies showed an increased mean flow velocity at rest (p < 0.05) in the middle cerebral ...
K, Rieke, C C, Gallen, L, Baker, D J, Dalessio, B J, Schwartz, A K, Torruella, S M, Otis   +6 more
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Evaluation of cerebrovascular spasm with transcranial Doppler ultrasound

Journal of Neurosurgery, 1984
✓ The use of an ultrasonic transcranial Doppler technique for noninvasive evalution of cerebral vasospasm is described. Middle cerebral arteries (MCA's), classified as spastic on angiography, demonstrated blood-flow velocity between 120 and 230 cm/sec.
R, Aaslid, P, Huber, H, Nornes
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Noninvasive transcranial Doppler ultrasound in intracranial angiomas

Neurology, 1986
Transcranial Doppler ultrasound is a noninvasive method to evaluate flow velocities in the basal cerebral arteries. It can provide hemodynamic data like velocity distributions, intracranial steal phenomena, and functional stenoses in angiomas as illustrated in four patients.
A, Schwartz, M, Hennerici
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Brain embolism monitoring with transcranial Doppler ultrasound

Current Treatment Options in Cardiovascular Medicine, 2003
Embolism is considered to be the main mechanism leading to brain infarction today; with the introduction of sophisticated neuroimaging tools, its impact is increasingly appreciated. Transcranial Doppler ultrasound allows noninvasive monitoring of in vivo embolism.
Viken L., Babikian, Christine A., Wijman
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Transcranial Doppler Ultrasound

2017
The purpose of perioperative and critical care transcranial Doppler (TCD) ultrasonographic monitoring is to assess cerebral perfusion change. This is accomplished through noninvasive continuous measurement of blood flow-velocity within the largest intracranial blood vessels.
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[Transcranial Doppler ultrasound].

Canadian Association of Radiologists journal = Journal l'Association canadienne des radiologistes, 1992
Over 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, M, Lafortune, L H, Lebrun, P, Couillard   +3 more
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Better With Ultrasound: Transcranial Doppler.

Chest, 2020
Transcranial 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, Atul, Jaidka, Katie, Wiskar, Nicholas, Packer, J Elaine, Tang, Seth, Koenig, Scott J, Millington, Robert T, Arntfield   +7 more
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Detection of Microembolic Signals with Transcranial Doppler Ultrasound

2006
Detection 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

2021
This 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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