Comparison of divergence-free algorithms for 3D MRI with three-directional velocity encoding
نویسندگان
چکیده
منابع مشابه
Comparison of divergence-free algorithms for 3D MRI with three-directional velocity encoding
Background The velocity-to-noise ratio in 4D MR Flow acquisitions can suffer, particularly for low velocity segments, because the velocity encoding settings are adjusted to the highest velocities in the volume. Blood is essentially incompressible so vascular velocity fields should be divergence free. Therefore, any remaining divergence in an acquired 3D or 4D MR flow dataset can be assumed to o...
متن کاملThree-directional myocardial motion assessed using 3D phase contrast MRI.
Regional myocardial function is a complex entity consisting of motion in three dimensions (3D). Besides magnetic resonance imaging (MRI), no other noninvasive technique can give a true 3D description of cardiac motion. Using a time-resolved 3D phase contrast technique, three-dimensional image volumes containing myocardial velocity data in six normal volunteers were acquired. Coordinates and vel...
متن کامل4D Flow and 2D PC MRI: impact of volumetric coverage and three-directional velocity encoding on quantification of aortic hemodynamics
Background The accurate assessment of arterial blood flow is crucial for the diagnosis and management of patients with cardiovascular disease. Our aim was to systematically compare three phase-contrast (PC) MRI sequences for the quantification of aortic hemodynamics, including: 1) 2D time-resolved (CINE) PC MRI with one-directional through-plane (2D-1dir) velocity encoding; 2) 2D CINE PC MRI wi...
متن کاملcomparison of blood flow velocity changes in posterior cerebral artery measured with transcranial doppler sonography in migraineurs with visual aura and normal persons after photostimulation
چکیده ندارد.
15 صفحه اولAn Immersed Boundary Method with Divergence-Free Velocity Interpolation
The Immersed Boundary (IB) method is a mathematical framework for constructing robust numerical methods to study fluid-structure interaction in problems involving an elastic structure immersed in a viscous fluid. The IB formulation uses an Eulerian representation of the fluid and a Lagrangian representation of the structure. The Lagrangian and Eulerian frames are coupled by integral transforms ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Cardiovascular Magnetic Resonance
سال: 2012
ISSN: 1532-429X
DOI: 10.1186/1532-429x-14-s1-w64