Using real-time 3D-speckle-tracking in the clinical course of Tako-Tsubo turned out as a quick and feasible tool for recognition and follow-up of wall motion abnormalities.

Introduction: The tracking of anatomical features in cardiac cine MR images facilitates the analysis of myocardial motion. For example, wall thickening is an important clinical index of myocardial function. Non-rigid registration methods allow fast, automatic tracking of image features through a temporal sequence [1]. We implemented an efficient non-rigid registration algorithm on the scanner’s...

Since the introduction of ultrasound in cardiology, the wish to quantify cardiac function was the driver for the development of new technologies. M-mode, which projects speckle information of cardiac struc tures over time, is so to speak the initial form of one-dimensional wall motion tracking. Twodimen sional speckle tracking is useful, has some limitations, though, because the heart has three...

Bacterial cell wall synthesis is the target for some of our most powerful antibiotics and has thus been the subject of intense research focus for more than 50 years. Surprisingly, we still lack a fundamental understanding of how bacteria build, maintain and expand their cell wall. Due to technical limitations, directly testing hypotheses about the coordination and biochemistry of cell wall synt...

Through-wall radars are researched and developed for the detection, localization, tracking of human activities in indoor environments. Electromagnetic wave propagation through walls introduces refraction, attenuation, multipath, ghost targets radar signatures. Estimation wall characteristics (dielectric profile thickness) can enable effects to be deconvolved from through-wall We propose use gen...

BACKGROUND Mechanical dyssynchrony is a potential means to predict response to cardiac resynchronization therapy (CRT). We hypothesized that novel echocardiographic image speckle tracking can quantify dyssynchrony and predict response to CRT. METHODS AND RESULTS Seventy-four subjects were studied: 64 heart failure patients undergoing CRT (aged 64+/-12 years, ejection fraction 26+/-6%, QRS dur...

We report a new method to measure the velocity of a fluid in the vicinity of a wall. The method, that we call Particle-Shadow Tracking (PST), simply consists in seeding the fluid with a small number of fine tracer particles of density close to that of the fluid. The position of each particle and of its shadow on the wall are then tracked simultaneously, allowing one to accurately determine the ...

Multi-surface environments integrate a wide variety of different devices such as mobile phones, tablets, digital tabletops and large wall displays into a single interactive environment. The interactions in these environments are extremely diverse and should utilize the spatial layout of the room, capabilities of the device, or both. For practical multi-surface environments, using low-cost instr...

In this paper, we extend a computationally efficient framework for real-time tracking of deformable subdivision surfaces in 3D echocardiography with speckle-tracking measurements to track material points. Tracking is performed in a sequential state-estimation fashion, using an extended Kalman filter to update the subdivision surface based on displacement vectors from 3D block-matching in the le...