Magnetic resonance angiography. Cerebrovascular applications.

Ruggieri, Paul; Masaryk, Thomas J.; Ross, Jeffrey S.

doi:10.1161/01.str.23.5.774

Cited by 24 publications

(9 citation statements)

References 23 publications

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“…The treatment result with 12 re-canalized aneuryms among 54 treated aneuryms is in agreement with other experiences [11]. The distribution of aneurysm localizations and pretreatment sizes and neck configurations [1,2,3] indicate that our patient sample represents a fairly random population with minimal selection bias.…”

Section: Discussionsupporting

confidence: 86%

“…Magnetic resonance angiography (MRA) has already been accepted as a noninvasive means to screen for unruptured cerebral aneurysms in certain patient populations [11] and has shown high sensitivity for the diagnosis of ruptured aneurysms [12,13,14]. Recently, MRA has also been suggested as a noninvasive adjunct to DSA for the assessment of durable results after GDC treatment [15,16,17,18,19].…”

Section: Abstract Guglielmi Detachable Coils´intracranial Aneurysm´mrmentioning

confidence: 99%

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Noninvasive follow-up of GDC-treated saccular aneurysms by MR angiography

et al. 2001

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The aim of this study was to determine sensitivity and specificity of magnetic resonance angiography (MRA) for the assessment of durable occlusion of intracranial aneurysms with Guglielmi detachable coils (GDC) and to point out the influence of MRA results in re-intervention strategies. Forty-five patients with 54 aneurysms that were previously treated by endovascular occlusion with GDC were selected for this study. All patients underwent digital subtraction angiography (DSA) and MRA examinations on the same day. The time-of-flight MRA studies were performed on a 1-T scanner. The MRA images were first read by radiologists who were not aware of the DSA results. In a second consensus reading by the neuroradiologists who had performed all interventional procedures of this series, the decision was made as to whether re-treatment was necessary. The distribution of aneurysm sizes, configurations and treatment results were sufficient for an unbiased evaluation. The first blinded evaluation revealed a sensitivity of 71% and a specificity of 95% for MRA assessment of aneurysm reperfusion. In the second consensus reading, the sensitivity increased to 92% and the specificity was 98%. The blinded reading indicates that MRA is a useful adjunct to DSA for the assessment of durable results after endovascular treatment of intracranial aneurysms. In the consensus reading it became obvious that sensitivity and specificity of MRA can be increased to 92 and 98%, respectively, if the results were evaluated by experienced neuroradiologists, including prior knowledge of all other examinations. We have already increased the follow-up intervals for DSA and use MRA intermittently, based on these results.

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Section: Discussionsupporting

confidence: 86%

Section: Abstract Guglielmi Detachable Coils´intracranial Aneurysm´mrmentioning

confidence: 99%

Noninvasive follow-up of GDC-treated saccular aneurysms by MR angiography

et al. 2001

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“…These results indicated that 3D TOF MRA and our MRA scoring are appropriate for detecting occlusion and severe stenosis in the intracra nial internal carotid artery and the middle cerebral artery trunk. Since the vascular disorders in the posterior fossa, such as dissection and partial basilar thrombosis, have rel atively slow flow, 2D TOF MRA may be superior to 3D TOF MRA [13], False positives are of primary concern in using MRA as a diagnostic tool, and they were not uncommonly found in the A 1 portion of the anterior cerebral artery, the intracranial internal carotid artery and the M2 portion of the middle cerebral artery. In these regions, a number of normal vessels were incorrectly assessed as 'severe' steno sis because of the signal discontinuity.…”

Section: Discussionmentioning

confidence: 99%

Detection of Occlusive Lesions in Intracranial Arteries by Three-Dimensional Time-of-Flight Magnetic Resonance Angiography

et al. 1994

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To evaluate the accuracy of 3-dimensional time-of-flight magnetic resonance angiography (3D TOF MRA) for detecting intracranial arterial occlusive disease, this technique was compared with conventional angiography. The subjects were 54 patients with cerebrovascular ischemic disease. Using a semi-quantified grading scheme, stenotic lesions were assessed for each segment of the intracranial arteries to the level of the second segment. A high correlation in the degree of stenosis (Spearman rank correlation = 0.68, p = 0.0001, ĸstatistic = 0.846) and an extremely high sensitivity (100%) for detecting occlusive lesions were found. Specificity for each segment of the intracranial arteries varied from 94.8% (Ml portion of the middle cerebral artery) to 83.3% (Al portion of the anterior cerebral artery). However, mild stenosis tended to be slightly overestimated, and false-positive readings in specific parts of the vessels (the carotid siphon, the anterior cerebral artery orifice, and the middle cerebral artery bifurcation) were not insubstantial. We conclude that despite a relatively high false-positive rate in some regions, 3D TOF MRA is useful for evaluating intracranial major vessels in stroke patients.

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“…This makes MRA, together with TCD, particularly well suited to examining a patient in a very early phase of the disease (for example, when deciding whether or not to institute thrombolytic therapy) [24]. Until recently, noninvasive intracranial vascular examinations were only possible using TCD, although this was not always possible because of the absence of adequate windows.…”

Section: Discussionmentioning

confidence: 99%

Cerebral ischemia: Magnetic resonance angiography and transcranial Doppler evaluation

et al. 1994

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We examined 21 patients with ischemic cerebrovascular disease using magnetic resonance angiography and transcranial Doppler. In 17 patients (81%), the results obtained by the two methods were concordant. In our opinion, the associated use of transcranial Doppler and magnetic resonance angiography provides an accurate diagnostic evaluation of ischemic stroke patients, not only allowing the site of possible steno-occlusive disease of large and medium cerebral vessels to be identified, but also offering the possibility of obtaining dynamic information concerning the direction of blood flow in the presence of compensatory circulations at the level of Willis' circle.

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Magnetic resonance angiography. Cerebrovascular applications.

Cited by 24 publications

References 23 publications

Noninvasive follow-up of GDC-treated saccular aneurysms by MR angiography

Noninvasive follow-up of GDC-treated saccular aneurysms by MR angiography

Detection of Occlusive Lesions in Intracranial Arteries by Three-Dimensional Time-of-Flight Magnetic Resonance Angiography

Cerebral ischemia: Magnetic resonance angiography and transcranial Doppler evaluation

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