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 'Cerebrovascular Ultrasonography' 
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Result : Searchterm 'Cerebrovascular Ultrasonography' found in 1 term [] and 5 definitions [], (+ 3 Boolean[] results)
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Cerebrovascular UltrasonographyMRI Resource Directory:<br> - Carotid -
 
Cerebrovascular ultrasonography is the best screening tool for the detection of carotid artery stenosis. Transcranial sonography is used in the evaluation of patients with suspected cerebrovascular disease, but a common problem is the attenuation of the ultrasound signal by the skull.
Contrast enhanced ultrasound play a particularly important role in the visualization of the intracranial vessels, and thus improves the accuracy of transcranial Doppler and increases the potential of this technique. The use of microbubbles is helpful for classification of stenosis and for plaque evaluation in patients with poor initial examination. Ultrasound contrast agents avoid misdiagnosing a subtotal stenosis, which is a very important clinical issue.
See also Adventitia, Intima, Periorbital Doppler, and Acoustic Window.
Radiology-tip.comDigital Subtraction Angiography
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Radiology-tip.comContrast Enhanced Magnetic Resonance Angiography
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 Further Reading:
  Basics:
Role of ultrasound and contrast-enhanced ultrasound in patients with cerebrovascular disease(.pdf)Open this link in a new window
Friday, 1 March 2002   by eurheartjsupp.oupjournals.org    
  News & More:
Carotid artery color doppler ultrasound: 80-90% stenosis of the proximal internal carotid artery secondary to large atherosclerotic plaquesOpen this link in a new window
   by rad.usuhs.mil    
Searchterm 'Cerebrovascular Ultrasonography' was also found in the following service: 
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Contrast Enhanced Doppler ImagingInfoSheet: - Modes - 
Intro, 
Overview, 
Types of, 
etc.MRI Resource Directory:<br> - Doppler UltraSound -
 
Contrast agents improve the sensitivity of vascular Doppler ultrasound, for example in cerebrovascular sonography or examinations of deep abdominal vessels. They also enlarge the role of transcranial Doppler. Microbubbles can be used with various modes e.g., color and power Doppler imaging, as well as pulsed-wave Doppler to increase the signal intensity. However, the ultrasound system must be suitable for contrast enhanced technology.
Microbubbles usually stay within the vascular space; nevertheless, the contrast enhancement is limited to 2–6 minutes caused by physiologic clearance and bubble destruction.
Depended on the application, contrast agents can be administered with a different injection rate e.g., bolus injection, slow injection, or continuous infusion. Stable, homogeneous, and prolonged enhancement can be obtained with perfusion, lasting until the infusion is stopped.
See also Cerebrovascular Ultrasonography, Multiple Frame Trigger.
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 Further Reading:
  Basics:
Continuous Infusion Versus Bolus Injection Of Ultrasound Contrast Agents in Vascular Doppler Flow Imaging Response(.pdf)Open this link in a new window
Friday, 1 September 2000   by stroke.ahajournals.org    
  News & More:
Carotid artery color doppler ultrasound: 80-90% stenosis of the proximal internal carotid artery secondary to large atherosclerotic plaquesOpen this link in a new window
   by rad.usuhs.mil    
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UltraSound Reimbursement - Distributors - Software - Artifacts - Veterinary UltraSound - Resources
 
Periorbital DopplerMRI Resource Directory:<br> - Carotid -
 
Periorbital Doppler is a continuous wave Doppler examination, determining the amplitude, flow direction, and compression effect of the frontal or supraorbital arteries in the periorbital region.
See also Acoustic Window, and Cerebrovascular Ultrasonography.
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SonographyMRI Resource Directory:<br> - Patient Information -
 
Medical Sonography (also called ultrasonography) uses equipment that generates high frequency sound waves to produce images from muscles, soft tissues, fluid collections, and vascular structures of the human body. Obstetric sonography is commonly used during pregnancy. Sonography visualizes anatomy, function, and pathology of for example gallbladder, kidneys, pancreas, spleen, liver, uterus, ovaries, urinary bladder, eye, thyroid, breast, aorta, veins and arteries in the extremities, carotid arteries in the neck, as well as the heart.
A typical medical ultrasound machine, usually a real-time scanner, operates in the frequency range of 2 to 13 megahertz.
See also Musculoskeletal and Joint Ultrasound, Pediatric Ultrasound, Cerebrovascular Ultrasonography and Contrast Enhanced Ultrasound.
Radiology-tip.comTomography
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• View the news results for 'Sonography' (4).



 Further Reading:
  Basics:
UltrasoundOpen this link in a new window
Thursday, 20 October 2005   by en.wikipedia.org    
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ultrasound of blighted ovumOpen this link in a new window
   by rad.usuhs.mil    
Searchterm 'Cerebrovascular Ultrasonography' was also found in the following service: 
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MRI  (1) Open this link in a new window
Transcranial DopplerMRI Resource Directory:<br> - Carotid -
 
(TCD) Transcranial color Doppler sonography allows to evaluate the presence and flow direction of vessels as well as their relationships to surrounding structures.
A disadvantage of cerebrovascular ultrasonography is the attenuation of the ultrasound signal by the skull. The loss of power through the skull is considerable, the signal to noise ratio is poor and so contrast enhanced Doppler imaging is advantageous. The use of ultrasound contrast agents provides a diagnostic window of sufficient duration and imaging quality to improve an evaluation of the cerebral vessels. Contrast TCD also results in visualization of small arteries and veins and greater length of these vessels.
See also A-Mode, Cranial Bone Thermal Index, Transcranial Color Coded Sonography and Transcranial Window.
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• View the news results for 'Transcranial Doppler' (1).



 Further Reading:
  Basics:
Relationship between Findings of Conventional and Contrast-Enhanced Transcranial Color-Coded Real-Time Sonography and Angiography in Patients with Basilar Artery Occlusion(.pdf)Open this link in a new window
Monday, 1 April 2002   by www.ajnr.org    
Success Rate of Transcranial Color-Coded Duplex Ultrasonography in Visualizing the Basal Cerebral Arteries in Vascular Patients Over 60 Years of AgeOpen this link in a new window
Thursday, 1 July 1999   by stroke.ahajournals.org    
  News & More:
Role of ultrasound and contrast-enhanced ultrasound in patients with cerebrovascular disease(.pdf)Open this link in a new window
Friday, 1 March 2002   by eurheartjsupp.oupjournals.org    
Transcranial Echo Contrast Studies in Healthy VolunteersOpen this link in a new window
Wednesday, 1 November 1995   by stroke.ahajournals.org    
Cerebral Arteriovenous Malformations: Diagnostic Value of Echo-Enhanced Transcranial Doppler Sonography Compared with AngiographyOpen this link in a new window
Friday, 1 January 1999   by www.ajnr.org    
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Prenatal - Ultrasound Gel - Resources pool - Education pool - 4d UltraSound - Fetal
 
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