We analyzed the correlation between Left Ventricular (LV) contraction and right ventricular pacing position via longitudinal strain on 2 dimensional speckle tracking echocardiography in a patient underwent permanent pacemaker implantation developed induced cardiomyopathy

sar (synthetic aperture radar) image enhancement and segmentation is purpose of this thesis. sar image segmentation is a primary step before steps such as classification and target recognition. the main obstacle in sar image segmentation is inherent speckle noise. speckle noise is a multiplicative and highly destructive noise which results to intensity inhomogeneity. hence common segmentation m...

Three-dimensional deformation field in the vicinity of a blunt crack in a sheet of low-hardening material is determined using laser speckle and moir6 techniques. Experimental results are compared with the HRR singularity field. A zone of dominant three-dimensional effects is mapped out ahead of the crack tip. Strain contours, elastic plastic boundary and maximum shear strain trajectories are al...

speckle is a granular disturbance in coherent images such as synthetic aperture radar (sar) images, modeled as a multiplicative noise. this noise degrades the sar image and complicates the image exploitation using automated image analysis techniques. several approaches have been developed to reduce the effect of speckle noise. recently, the application of compressed sensing (cs) is explored in ...

Three-dimensional imaging provides profile information not available with conventional twodimensional imaging. Many three-dimensional objects of interest are opaque to the illuminating radiation, meaning that the object exhibits surface, as opposed to volume, scattering. We investigate the use of an opacity constraint to perform three-dimensional phase retrieval. The use of an opacity constrain...

PURPOSE To report a new apparatus for noncontact, two-dimensional measurement of retinal microcirculation using the laser speckle phenomenon and to demonstrate that this apparatus can document known or expected changes in retinal blood flow. METHODS The rabbit fundus was illuminated by an argon (blue) laser spot (0.62 x 0.62 mm), and its image speckle was detected with an image sensor. The di...