Magnetic Resonance Angiography Methods
Mostrando 1-11 de 11 artigos, teses e dissertações.
-
1. A comparison between magnetic resonance angiography at 3 teslas (time-of-flight and contrast-enhanced) and flat-panel digital subtraction angiography in the assessment of embolized brain aneurysms
PURPOSE: To compare the time-of-flight and contrast-enhanced- magnetic resonance angiography techniques in a 3 Tesla magnetic resonance unit with digital subtraction angiography with the latest flat-panel technology and 3D reconstruction in the evaluation of embolized cerebral aneurysms. INTRODUCTION: Many embolized aneurysms are subject to a recurrence of i
Clinics. Publicado em: 2011
-
2. Estudo comparativo entre ultra-sonografia com Doppler colorido, angiografia por ressonância magnética, por subtração digital 2D e 3D na doença dos vasos carotídeos cervicais / A comparative study of Doppler ultrasound, magnetic resonance angiography, 2D and 3D digital subtraction angiography in cervical carotid stenoocclusive disease
INTRODUCTION: Noninvasive techniques such as Doppler ultrasound (DUS) and contrast enhanced magnetic resonance angiography (CEMRA) are each day more used in the evaluation of the internal carotid arteries (ICA). On comparison studies 2D digital subtraction angiography (2D DSA) has been considerate as the reference standard, however its an expensive and invas
Publicado em: 2009
-
3. Infarto agudo do miocÃrdio com supra-ST nÃo complicado: no Hospital UniversitÃrio Oswaldo Cruz: MÃtodos de estratificaÃÃo de risco
The purpose of this paper is to review information about the non-complicated supra- ST myocardial infarct, based on medical evidence and on the last published guidelines. It will be reported theory, epidemiological aspects, strategies of cardiovascular risk stratification of adverse events available (which are non-invasive and invasive), accompanying exams a
Publicado em: 2007
-
4. "Contribuição da ressonância magnética na avaliação de doadores do lobo direito ao transplante hepático intervivos" / Contribuition of magnetic resonance in the evaluation of donors for right lobe living liver transplantation
The purpose of this study was to establish the value of the magnetic resonance in 30 potential donors for right lobe living liver transplantation. The main goal was to determine the following factors: steatosis; biliar anatomy; hepatic arterial anatomy; portal and hepatic venous anatomy, and lobar liver volume, comparing them to liver biopsy results, to intr
Publicado em: 2004
-
5. Assessment of coronary artery stenosis by magnetic resonance imaging.
OBJECTIVE: The findings of magnetic resonance and x-ray angiography were compared for assessment of coronary artery stenosis in this validation study. BACKGROUND: Magnetic resonance angiography of the coronary arteries has recently been described, but there has been no comparison with x-ray angiography of localisation or assessment of important characteristi
-
6. Utility of intravascular ultrasound in peripheral interventions.
Endovascular imaging techniques encompass a variety of methods, including angiography, computed tomography, magnetic resonance imaging, angioscopy, and intravascular ultrasound. Each method provides unique information regarding the continuity of vascular structures and the morphology and distribution of lesions. Although arteriography has been the "gold stan
-
7. Magnetic resonance imaging of coronary arteries: technique and preliminary results.
BACKGROUND--Coronary artery imaging is an important investigation for the management of coronary artery disease. The only reliable technique presently available, x ray contrast angiography, is invasive and is associated with a small morbidity and mortality. Alternative non-invasive imaging would be useful, but the small calibre and tortuosity of the coronary
-
8. Magnetic resonance imaging and measurement of blood flow.
Blood flow can be shown as a negative image with magnetic resonance spin-echo techniques or as a positive image with gradient-echo techniques. Phase contrast refers to techniques where structures can be seen because of flow-induced phase shifts. These techniques can show the presence (slow flow) and also the direction of flow. Gradient-echo techniques--inclu
-
9. Ultrafast magnetic resonance imaging improves the staging of pancreatic tumors.
OBJECTIVE: This prospective study was undertaken to evaluate the accuracy of a noninvasive "all-in-one" staging method in predicting surgical resectability in patients with pancreatic or periampullary tumors. SUMMARY BACKGROUND DATA: Despite progress in imaging techniques, accurate staging and correct prediction of resectability remains one of the chief prob
-
10. Prospective study of somatostatin receptor scintigraphy and its effect on operative outcome in patients with Zollinger-Ellison syndrome.
OBJECTIVE: To determine the relative abilities of somatostatin receptor scintigraphy (SRS) and conventional imaging studies (computed tomography, magnetic resonance imaging, ultrasound, angiography) to localize gastrinomas before surgery in patients with Zollinger-Ellison syndrome (ZES) subsequently found at surgery, and to determine the effect of SRS on the
-
11. A prospective trial evaluating a standard approach to reoperation for missed parathyroid adenoma.
OBJECTIVES: The authors evaluate the results of preoperative imaging protocols and surgical re-exploration in a series of patients with missed parathyroid adenomas after failed procedures for primary hyperparathyroidism. BACKGROUND: The success rate is lower and the complication rate is increased in patients undergoing reoperation for primary hyperparathyroi