Four experiments are reported that investigated the role of the perceived coplanarity of a moving target with respect to a frame of reference in the third dimension on the perceived path of that target. When a target dot and small moving frame appeared coplanar, the dot's perceived trajectory was governed entirely by its changing position relative to the moving frame. However, when the target a...

Ultrafast imaging using plane or diverging waves has recently enabled new ultrasound imaging modes with improved sensitivity and very high frame rates. Some of these new imaging modalities include shear wave elastography, ultrafast Doppler, ultrafast contrast-enhanced imaging and functional ultrasound imaging. Even though ultrafast imaging already encounters clinical success, increasing even mo...

For the nonlinear analysis of structures using the well known Newton-Raphson Method, the tangent stiffness matrices of the elements must be constructed in each iteration. Due to the high expense required to find the exact tangent stiffness matrices, researchers have developed novel innovations into the Newton-Raphson method to reduce the cost and time required by the analysis. In this paper, a ...

a generalization of the known results in fusion frames and $g$-frames theory to continuous fusion frames which defined by m. h. faroughi and r. ahmadi, is presented in this study. continuous resolution of the identity (cri) is introduced, a new family of cri is constructed, and a number of reconstruction formulas are obtained. also, new results are given on the duality of continuous fusion fram...

INTRODUCTION In time-resolved MRI, there is a trade-off between spatial and temporal resolution due to requirement of the Nyquist theorem. Previously, we described a time-resolved hybrid radial/Cartesian acquisition, PR-TRICKS [1], which combines in-plane radially undersampled acquisition with through-plane Cartesian TRICKS acquisition to provide large undersampling factors. We have recently de...

Suppose there are two objects which are moving independently and rigidly in 3D space. Assume we have an orthographic camera. The image plane is perpendicular to Z axis and passes from the origin. What we are given as input is the projection of 3D object points to the image plane at each time step, as a sequence of images. So basically we are given a video of two objects moving, and our goal is ...

Introduction Quantification of myocardial perfusion from cardiac magnetic resonance (CMR) images relies on manual tracing of myocardial regions of interest (ROIs) and their repositioning frame-by-frame throughout the contrast-enhanced image sequence. Additionally, out-of-plane motion due to patient’s respiration frequently requires that myocardial ROIs to be redrawn.This tedious and potentially...