Three-Dimensional-Wall Motion Tracking: A New and Faster Tool for Myocardial Strain Assessment: Comparison With Two-Dimensional-Wall Motion Tracking

2009 ◽  
Vol 22 (4) ◽  
pp. 325-330 ◽  
Author(s):  
Leopoldo Pérez de Isla ◽  
David Vivas Balcones ◽  
Covadonga Fernández-Golfín ◽  
Pedro Marcos-Alberca ◽  
Carlos Almería ◽  
...  
Keyword(s):  
Motion Tracking ◽  
Wall Motion ◽  
Myocardial Strain ◽  
Three Dimensional ◽  
Two Dimensional

scholarly journals Levitation of a drop over a moving surface

2013 ◽  
Vol 733 ◽  
Author(s):  
Henri Lhuissier ◽  
Yoshiyuki Tagawa ◽  
Tuan Tran ◽  
Chao Sun
Keyword(s):  
Film Thickness ◽  
Wall Motion ◽  
Angular Position ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Capillary Length ◽  
Large Velocity ◽  
Rotating Hollow Cylinder ◽  
Drag And Lift ◽  
Air Film

AbstractWe investigate the levitation of a drop gently deposited onto the inner wall of a rotating hollow cylinder. For a sufficiently large velocity of the wall, the drop steadily levitates over a thin air film and reaches a stable angular position in the cylinder, where the drag and lift balance the weight of the drop. Interferometric measurements yield the three-dimensional (3D) air film thickness under the drop and reveal the asymmetry of the profile along the direction of the wall motion. A two-dimensional (2D) model is presented which explains the levitation mechanism, captures the main characteristics of the air film shape and predicts two asymptotic regimes for the film thickness ${h}_{0} $: for large drops ${h}_{0} \sim {\mathit{Ca}}^{2/ 3} { \kappa }_{b}^{- 1} $, as in the Bretherton problem, where $\mathit{Ca}$ is the capillary number based on the air viscosity and ${\kappa }_{b} $ is the curvature at the bottom of the drop; for small drops ${h}_{0} \sim {\mathit{Ca}}^{4/ 5} {(a{\kappa }_{b} )}^{4/ 5} { \kappa }_{b}^{- 1} $, where $a$ is the capillary length.

Three-dimensional liver motion tracking using real-time two-dimensional MRI

2014 ◽  
Vol 41 (4) ◽  
pp. 042302 ◽  
Author(s):  
Lau Brix ◽  
Steffen Ringgaard ◽  
Thomas Sangild Sørensen ◽  
Per Rugaard Poulsen
Keyword(s):  
Real Time ◽  
Motion Tracking ◽  
Three Dimensional ◽  
Two Dimensional
Sign in / Sign up

Export Citation Format

Share Document