We studied caloric nystagmus before and after plugging all six semicircular canals to determine whether velocity storage contributed to the spatial orientation of caloric nystagmus. Monkeys were stimulated unilaterally with cold ( approximately 20 degrees C) water while upright, supine, prone, right-side down, and left-side down. The decline in the slow phase velocity vector was determined over...

the stolt (f-k) migration algorithm is a direct (i.e. non-recursive) fourier-domain technique based on a change of variables (or equivalently, a mapping) that converts the input spectrum to the output spectrum. the algorithm is simple and efficient but limited to constant velocity. a v(z)(f-k) migration method, capable of very high accuracy for vertical variations of velocity, can be formulated...

The superiority of multiple-input multiple-output (MIMO) radars over conventional radars has been recently shown in many aspects. These radars consist of many transmitters and receivers located far from each other. In this scenario, the MIMO radar is able to observe the targets from different directions. One of the advantages of these radars is exploitation of Doppler frequencies from different...

1 ABSTRACT Velocity Magnetic Resonance (MR) images are a novel form of medical images. A special gradient-modulation technique is utilised to capture motion velocity of tissue and blood. As well as the tissue density image, there are also other images that depict the velocity components along axes deened relative to the plane of imaging. The images are of the cardiac region and are aligned with...

This article presents a motion compensation procedure that significantly improves the accuracy of synthetic aperture tensor velocity estimates for row-column arrays. The proposed scheme reduces effects by moving image coordinates with field during summation low-resolution volumes. is estimated using transverse oscillation cross-correlation estimator, and each coordinate's local determined upsam...

Cardiac resynchronization therapy (CRT) has emerged as an important method to treat patient with symptomatic heart failure with evidence of intraventricular dyssynchrony. Tissue Doppler imaging by echocardiography has been shown to be an excellent tool for the assessment of mechanical left ventricular dyssynchrony and the selection of patients for CRT. However, there are some patients who do no...

Nomenclature SF a , SFx a , SF y a , SFz a = specific force acceleration vector (sensed by accelerometers) and components in frame B B = sensor (body) coordinate frame aligned with strapdown inertial sensor axes 1 m B  = frame B orientation at computer cycle 1 m  () Bt = frame B orientation at time t k r c = combination, k elements selected from a set of r elements without regard to the order...

We outline a general methodology to infer the inductive velocity field vector in solar active regions. For the first time, both the field-aligned and the crossfield velocity components are reconstructed. The cross-field velocity solution accounts for the changes of the vertical magnetic field seen between a pair of successive active-region vector magnetograms via the ideal induction equation. T...