Computation of flow pressure fields from magnetic resonance velocity mapping.
Magnetic resonance phase velocity mapping has unrivalled capacities for acquiring in vivo multi-directional blood flow information. In this study, the authors set out to derive both spatial and temporal components of acceleration, and hence differences of pressure in a flow field using cine magnetic resonance velocity data. An efficient numerical algorithm based on the Navier-Stokes equations for incompressible Newtonian fluid was used. The computational approach was validated with in vitro flow phantoms. This work aims to contribute to a better understanding of cardiovascular dynamics and to serve as a basis for investigating pulsatile pressure/flow relationships associated with normal and impaired cardiovascular function.
Yang
G Z
GZ
Magnetic Resonance Unit, Royal Brompton Hospital, London, United Kingdom.
Kilner
P J
PJ
Wood
N B
NB
Underwood
S R
SR
Firmin
D N
DN
D000465:Algorithms; D001783:Blood Flow Velocity; D001808:Blood Vessels / Q000473:pathology; D003326:Coronary Circulation / Q000502:physiology; D006801:Humans; D018810:Magnetic Resonance Angiography / Q000379:methods*; D008433:Mathematics; D019047:Phantoms, Imaging; D011312:Pressure