W e describe a case of post-operative displacement of an aortic coarctation (CoA) stent, which was determined 6 months after deployment. A 21-year-old woman with history of surgery for CoA in early childhood presented with fatigue and shortness of breath. Cardiac catheterization and aortography showed a recurrence of CoA. An 18 42-mm Sinus-XL (Optimed XL, Ettlingen, Germany) self-expandable ste...

We demonstrate the formation of ionic metal chloride (CuCl) two-dimensional (2D) nanocrystals epitaxially templated on the surface of monolayer molybdenum disulfide (MoS2). These 2D CuCl nanocrystals are single atomic planes from a nonlayered bulk CuCl structure. They are stabilized as a 2D monolayer on the surface of the MoS2 through interactions with the uniform periodic surface of the MoS2. ...

The Taguchi method is widely used for the optimization of mechanical design and this study is used it in the design of a 2D circular flexure hinge for a z-tilt piezoelectric based nano-scale compensation stage. Maximum displacement of the stage is 16 μm at z-axis and ±30 arcsec at θx and θy. The most important design parameters for such a flexure hinge are minimal diameter, body height, and not...

Introduction: Quantitative functional cardiac imaging can be used to characterize healthy and diseased myocardial tissues. Imaging protocols that measure 3D motion of the heart can lead to more accurate characterization than 2D approaches. However, 3D protocols are often too time-consuming for clinical feasibility. zHARP is a fast imaging technique that can quantify 3D myocardial motion from a ...

(1) Royal Military Academy, Brussels, Belgium (2) University of California, San Diego, USA Ballistocardiography (BCG) is a technique that had a large interest in cardiology between the fifties and eighties. Typically BCG consisted in the recording of mechanical acceleration (Acc), caused by cardiac activity, on a subject lying on a table. As Acc was recorded only in the 2-dimensions (2D) of the...

Different authors have modelled myofascial tissue connectivity over a distance using cadaveric models, but in vivo models are scarce. The aim of this study was to evaluate the relationship between pelvic motion and deep fascia displacement in the medial gastrocnemius (MG). Deep fascia displacement of the MG was evaluated through automatic tracking with an ultrasound. Angular variation of the pe...

In this paper, we establish sensitivity results that are relevant for imaging stiffness in tissue but may also be useful in other contexts. The data are the displacement at a single frequency throughout the imaging domain. The goal is to determine how the quantities—(1) amplitude of displacement, or alternatively (2) the displacement itself, the average displacement, the phase or the phase grad...

In the present study, vibration of cylindrical laminates with different layers and angles were studied. In order to actuate and polarize in radial direction, a piezoelectric layer was located at outer surface of composite shell. Laminates were assumed long enough so that plane strain state analysis in 2D can be used properly. In order to satisfy the boundary conditions, variables in terms of Fo...

In this paper, a novel mathematical—physical model of the generalized elasto-thermodiffusion (hole/electron interaction) waves in semiconductor materials is studied when hyperbolic two-temperature theory two-dimensional (2D) deformation taken into account. Shear (purely transverse) are dissociated from remainder motion and remain unaffected by external fields. The coupled system partial differe...

It is remarkable that the pathological state of human soft tissues highly correlates with static and low-frequency mechanical properties, particularly shear elasticity (e.g., Sumi, 2005d). Accordingly, we have been developing ultrasonic (US)-strain-measurement-based onedimensional (1D) (Sumi et al., 1993, 1995a, 2010f; Sumi, 1999b, 2005d, 2008a, 2010d; Sumi & Matsuzawa, 2007b), 2D (Sumi et al.,...