This paper describes a simple and inexpensive technique for the imaging (detection) of concealed object. Burg method is used as a high resolution technique to model the holographic imaging (detecting) problem. Ultrasonic waves are used for imaging a concealed object. The in-line holography is employed. The results demonstrate the enhanced performance capability of the combination of Burg and ho...

Urban drainage systems are frequently analysed using hydraulic modelling software packages such as InfoWorks CS or MIKE-Urban. The use of such modelling tools allows the evaluation of sewer capacity and the likelihood and impact of pluvial flood events. Models can also be used to plan major investments such as increasing storage capacity or the implementation of sustainable urban drainage syste...

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau...

Present paper describes a new modality of medical imaging, Acousto-Mechanical Imaging (AMI) comprising features of both ultrasonic Elasticity Imaging (Er) and Mechanical hnaging(MI) (12). The data on the stress pattern measured by the force sensor array of MI complement the strain data obtained by ultrasonic EI device. Synergy of combining these two complementary methods results in the fact tha...

Cross fertilization between the quantitative nondestructive evaluation (QNDE) community and the diagnostic medicine community in the area of ultrasonics represents an attractive but challengin~ goal. High resolution, real-time ultrasonic imaging is routinely available not only in major medical centers but even in modest community hospitals. However, quantitative ultrasonic evaluation based on t...

This paper reports an experimental evaluation of the following three different MRI-compatible actuators: a Shinsei ultrasonic motor a Nanomotion ultrasonic motor and a pneumatic cylinder actuator. We report the results of a study comparing the effect of these actuators on the signal to noise ratio (SNR) of MRJ images under a variety of experimental conditions. Evaluation was performed with the ...

al’s properties and acoustical characteristics have been studied for a long time and ultrasonic techniques have been used in non-destructive testing and imaging for decades. Ultrasound as an analytical tool has revolutionised diagnostics in medicine, but the application of ultrasound to material’s analyses has been held back by problems with ultrasonic design, electronics, sample handling, comp...

When Horsley and Clark invented the stereotaxic technique they revolutionized experimental neurobiology. For the first time it became possible to repeatably place experimental or surgical probes at precise locations within the skull. Unfortunately, variations in the position and size of neuroanatomical structures within the cranium have always limited the efficiency of this technology. Recent a...

Light focusing plays a central role in biomedical imaging, manipulation, and therapy. In scattering media, direct light focusing becomes infeasible beyond one transport mean free path. All previous methods1-3 to overcome this diffusion limit lack a practical internal "guide star."4 Here we proposed and experimentally validated a novel concept, called Time-Reversed Ultrasonically Encoded (TRUE) ...

Ultrasonic imaging and tissue characterization is a noninvasive technique widely used in medicine for many years to assess body conditions. However, the expertise required to operate the equipment and interpret the results is not always available. The medical ultrasonography project is developing a system concept for a remotely steerable, multibeam ultrasonic scanner that can be operated by ski...