OBJECTIVE To assess prognosis of pulmonary thromboembolism using tissue Doppler echocardiography and brain natriuretic peptide. METHODS Patients aged over 18 years were evaluated within 24 hours of confirmed diagnosis (chest tomography/pulmonary scintigraphy) of pulmonary embolism using two-dimensional echocardiography and tissue Doppler for right ventricular systolic (s') velocities, strain,...

Abstract We present a software package for single-dish data processing of spacecraft signals observed with VLBI-equipped radio telescopes. The Spacecraft Doppler tracking (SDtracker) allows one to obtain topocentric frequency detections sub-Hz precision and reconstructed residual phases the carrier signal any or landing vehicle at location in Solar System. These products are estimated using gro...

Detection and tracking of small targets in sea clutter using high-resolution radar is a challenging problem. Recently, Bernoulli track-before-detect (TBD) filter has been developed for an airborne scanning the maritime domain, with purpose detection short-exposure by fast mode (i.e., short dwell-time noncoherent integration). This article investigates potential benefits coherent processing expl...

Permanent patellar dislocation with tibiofemoral joint osteoarthritis is a relatively rare condition. To treat this condition, total knee arthroplasty with proximal or distal realignment of the extensor mechanism has been reported. We report a challenging case of an 80-year-old woman diagnosed with permanent patellar dislocation with tibiofemoral joint osteoarthritis treated by a mobile bearing...

Stationary clutter arises in a wide area of different radar or sonar applications. Without adaption to a non-uniform clutter distribution, tracking algorithms try to initialize tracks in these areas repeatedly while in most cases there is no target to be found. The intention of this paper is to discuss different ways to enable clutter mapping in order to use this as an efficient tool for target...

We present a strategy for designing an α-β-η-θ filter, a fixed-gain moving-object tracking filter using position and velocity measurements. First, performance indices and stability conditions for the filter are analytically derived. Then, an optimal gain design strategy using these results is proposed and its relationship to the position-velocity-measured (PVM) Kalman filter is shown. Numerical...

Countless security and defense systems require an accurate Angle of Arrival (AOA) detection for incoming signals. Angle of Arrival (AOA) estimation is basic procedure required by several monitoring and tracking systems for security applications and other defense purposes. In this paper, a combined OFDM system and bandpass sampling method using Multiple Signal Classification (MUSIC) algorithm fo...

This paper investigates range-only tracking with range-Doppler coupling, where the range measurement of a target of interest is linearly biased by its range-rate (or Doppler). In previous treatments the situation was monostatic, and a simple Riccati analysis sufficed, but here the system is multistatic (notionally, a MIMO radar). Here, the closed form of posterior Cramér-Rao bound (PCRB) is der...

This paper concerns the problem of array shape tracking from clutter for a towed active sonar array. Although heading sensors can provide towed-array shape information, they are sometimes not sufficiently available or accurate to facilitate beamforming with low sidelobe levels necessary for detection of low-Doppler targets, especially in the presence of severe bottom reverberation. We propose a...