Magnetic Resonance Angiography Techniques
نویسنده
چکیده
■ ■ Contrast-Enhanced Magnetic Resonance Angiography t1 Shortening phase encoding Considerations acquisition timing acquisition timing: test Bolus acquisition timing: Signal Initiated acquisition acquisition timing: Dynamic Subtraction Contrast-enhanced Magnetic resonance angiography Imaging parameters advantages of Contrast-enhanced Magnetic resonance angiography Limitations of Contrast-enhanced Magnetic resonance angiography
منابع مشابه
Blood Flow Simulation in an Aorta with a mild coarctation Using Magnetic Resonance Angiography and Finite Volume Method
Coarctation of the aorta is one of the five main congenital cardiovascular failures, accounting for 6–8 percent of these failures. This research aimed to simulate the blood flow of a seventeen-year-old male teen with a mild coarctation at one-third of his aorta's descending branch. The simulation was performed by extracting the domain and the input pulsatile velocity signal as the boundary cond...
متن کاملA 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 intra-aneurismal filling. Traditionall...
متن کاملComparison of different techniques for non-contrast –enhanced and contrast-enhanced Magnetic Resonance Angiography of the Carotid arteries
Purpose: Since the introduction of magnetic resonance imaging (MRI) in clinical routine vascular imaging always has been a challenge. Early MR angiography (MRA) techniques were based on intrinsic contrast mechanisms related to blood (non CE techniques). The development of contrast enhanced (CE) MRA techniques using gadolinium based contrast agents (GBCA) substantially changed vascular MR applic...
متن کاملFree breathing contrast-enhanced time-resolved magnetic resonance angiography in congenital heart disease
Background Contrast enhanced magnetic resonance angiography (MRA) is generally performed during a long breath-hold (BH), limiting its use in infants and children. Time resolved MR angiography (TRA) often use data sharing techniques, making it is necessary to acquire data during a BH. This study proposes a high-resolution free breathing (FB) TRA sequence for use in adults and children with conge...
متن کاملComparison of magnetic resonance angiography, conventional angiography, and duplex scanning.
BACKGROUND AND PURPOSE To determine the accuracy of magnetic resonance angiography in assessing patients with cerebrovascular disease, we performed a study comparing the results of conventional cerebral angiography, duplex scanning, and magnetic resonance angiography. METHODS From 42 patients, a total of 25 carotid arteries were evaluated by all three techniques. The studies were independentl...
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