Cerebrovascular magnetic resonance angiography: A critical verification

Wesbey, George E.; Bergan, John J.; Moreland, S I; Sedwitz, Marc M.; Bardin, Joshua A.; Schmalbrock, Petra; Listerud, John

doi:10.1016/0741-5214(92)90169-9

Cited by 23 publications

(7 citation statements)

References 18 publications

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“…MRA is a noninvasive way of imaging blood flow, and it currently has a reasonable degree of sensitivity. Wesby and colleagues [39] showed an exact correlation with the degree of stenosis obtained by two radiologists in 75% of 182 arteries evaluated by both radiologists and surgeons (MRA and ultrasound). Disagreement by one category was found in approximately 17% of the studies.…”

Section: Carotid Imaging Techniquessupporting

confidence: 86%

Advances in Management of Carotid Atherosclerosis

Malkoff

Williams

Biller

1997

J Intensive Care Med

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Carotid artery stenosis is a common and potentially treatable cause of stroke. Stroke risk is increased as the degree of carotid stenosis increases, as well as in patients with neurological symptoms referable to the stenosed carotid artery. Carotid stenosis can be quantified by ultrasound imaging, magnetic resonance angiography, or conventional angiography. Medical treatment with platelet antiaggregants reduces stroke risk in some patients; other patients are best treated with carotid endarterectomy. Experimental treatments for carotid stenosis, including carotid angioplasty with or without stenting, are under investigation. We summarize the current literature and provide treatment recommendations for patients with atherosclerotic carotid artery disease.

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Section: Carotid Imaging Techniquessupporting

confidence: 86%

Advances in Management of Carotid Atherosclerosis

Malkoff

Williams

Biller

1997

J Intensive Care Med

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“…'2 Previous studies comparing magnetic resonance angiography with conventional angiography have often quoted high correlation coefficients as an indication of good agreement. [13][14][15][16] The correlation coefficient measures the strength of a relation between two variables, not the agreement between them, and it is possible to produce high correlation coefficients for data that seem to be in poor agreement. '2 Problems also arise if the data are divided into several groups-for example, mild (0-29%), moderate (30-69%), severe (70-99%), and occluded (100%) categories, with the frequency of assignments to the same category by each method used as a measure of agreement.…”

Section: Discussionmentioning

confidence: 99%

Comparison of magnetic resonance angiography, duplex ultrasound, and digital subtraction angiography in assessment of extracranial internal carotid artery stenosis.

Young

Humphrey

Shaw

et al. 1994

Journal of Neurology, Neurosurgery & Psychiatry

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The results of a prospective study comparing ultrasound, intra-arterial digital subtraction angiography, and magnetic resonance angiography in the assessment of the degree of extracranial internal carotid artery stenosis are reported in patients with symptoms of recent carotid territory ischaemia. A total of 70 patients and 137 vessels were examined by all three techniques. The results obtained by each technique were reported blind. The mean difference (SD) for the comparison of magnetic resonance angiography and digital subtraction angiography was -0-7 (14)%, for ultrasound and digital subtraction angiography 3-1 (15)%, and for magnetic resonance angiography and ultrasound -3-8 (15)

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“…Hitherto, MR angiography has been the recommended imaging method for high-quality demonstration of cerebrovascular pathology [4,22,23,24,25,26,27,28], not only in sickle cell disease. More recently, an increasing number of studies has demonstrated the value of transcranial Doppler ultrasonography in the early detection of asymptomatic cerebral vasculopathy.…”

Section: Discussionmentioning

confidence: 99%

Transcranial Doppler ultrasonography in neurologically asymptomatic children and young adults with sickle cell disease

et al. 2003

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The purpose of the study was to evaluate transcranial Doppler ultrasonography for identifying cerebrovascular disease in neurologically asymptomatic children and young adults with sickle cell disease. A total of 47 consecutive patients with sickle cell disease (28 females, 19 males; age range 8 months to 29 years, mean age 9 years 6 months) were evaluated by transcranial color and duplex Doppler ultrasonography via transtemporal and occipital (2-MHz probe) as well as by transocular (5-MHz probe) approach. Eleven vessels (middle, posterior, anterior cerebral artery, vertebral artery, ophthalmic artery on each side and basilar artery) were analyzed in each patient. Following nine transcranial Doppler findings predictive for cerebrovascular disease, patients with one or more of those abnormal sonographic findings underwent MR imaging and MR angiography. In 8 patients with abnormal transcranial Doppler the MR angiography was normal. Thirty-one patients demonstrated normal results. In 15 of 16 patients with one or more abnormal Doppler findings (34% of all studied patients) MR imaging and MR angiography were performed. The MR angiography disclosed cerebrovascular stenosis in 7 patients (15% of all patients, 44% of those with pathological transcranial Doppler findings). In one of those patients MR imaging revealed silent peripheral ischemic infarction as well. Our findings indicate the usefulness of transcranial Doppler ultrasonography to reveal occult cerebrovascular lesions in neurologically asymptomatic patients with sickle cell disease. It should regularly be performed in all sickle cell patients in order to detect patients at risk for later stroke. Patients with homozygous disease and a high frequency of preceding sickle cell crises should be followed most closely.

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Cerebrovascular magnetic resonance angiography: A critical verification

Cited by 23 publications

References 18 publications

Advances in Management of Carotid Atherosclerosis

Advances in Management of Carotid Atherosclerosis

Comparison of magnetic resonance angiography, duplex ultrasound, and digital subtraction angiography in assessment of extracranial internal carotid artery stenosis.

Transcranial Doppler ultrasonography in neurologically asymptomatic children and young adults with sickle cell disease

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