A portable acoustic micro-Doppler radar system for the acquisition of human gait signatures in indoor and outdoor environments is reported. Signals from an accelerometer attached to the leg support the identification of the components in the measured micro-Doppler signature. The acoustic micro-Doppler system described in this paper is simpler and offers advantages over the widely used electromagnetic wave micro-Doppler radars.
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Sensors (Basel)
July 2019
Faculty of Electrical Engineering, University Teknologi Mara, Shah Alam 40450, Selangor, Malaysia.
Objective: Zebrafish has been recently considered an ideal vertebrate for studying developmental biology, genetics, particularly for modeling tumorigenesis, angiogenesis, and regeneration in vivo. However, when a zebrafish matures completely, its body loses transparency, thus making conventional optical imaging techniques difficult for imaging internal anatomy and vasculature. Acoustic wave penetration outperforms optical methods, high-frequency (>30 MHz) ultrasound (HFUS) was consequently an alternative imaging modality for adult zebrafish imaging, particularly for echocardiography However, visualizing peripheral vessels in a zebrafish by using conventional HFUS is still difficult.
View Article and Find Full Text PDFNeurosurgery
June 2015
*Dardinger Microneurosurgical Skull Base Laboratory, Department of Neurological Surgery and §Department of Radiology and Wright Center of Innovation in Biomedical Imaging, Wexner Medical Center, The Ohio State University, Columbus, Ohio; ‡Department of Neurosurgery, Umberto I General Hospital, Università Politecnica delle Marche, Ancona, Italy.
Background: Recent reports have validated the use of retrosigmoid approach extensions to deal with petroclival lesions.
Objective: To describe the topographic retrosigmoid anatomy of the intrapetrous internal carotid artery (IICA), providing guidelines for maximizing the petroclival region exposure via this route.
Methods: The IICA was exposed bilaterally in 6 specimens via a retrosigmoid approach in the semisitting position.
Int J Neural Syst
October 2013
Department of Physiology and Pharmacology, SUNY Downstate, 450 Clarkson Avenue, Brooklyn, NY 11203, USA.
The ability to recognize the behavior of individuals is of great interest in the general field of safety (e.g. building security, crowd control, transport analysis, independent living for the elderly).
View Article and Find Full Text PDFJ Acoust Soc Am
March 2012
National Center for Physical Acoustics, The University of Mississippi, 1 Coliseum Drive, University, Mississippi 38677, USA.
An approach has been developed for extracting human gait parameters from micro Doppler sonar grams. Key parameters include average speed of walking, torso velocity, walk cycle time, and peak leg velocity. The approach is a modification of a technique previously used in radar data analysis.
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