A high-frequency imaging acoustic camera was used to observe the behaviour of sablefish (Anoplopoma fimbria) and Pacific halibut (Hippoglossus stenolepis) around baited fish pots and baited hooks in the deep shelf environment (220 366 m depth) off Oregon.
To reduce computational cost and improve detection of small defects, a useful approach is to divide the waveform tomography procedure into two steps: first, a low-frequency model-building step aimed at recovering background structure, and second, a high-frequency imaging step targeting defects.
CITH was involved in many projects such contrast agents, high frequency imaging for human disease (eye and skin) and small animal imaging, detection of fetal movements, and relationship with mother's activity or fetal well being, tissular elasticity, detection of small particles in circulating blood and imaging of bronchial wall.
Some of these ultrasound imaging techniques seek to extract quantitative features about vessel networks, whereas high-frequency imaging also allows individual vessels to be resolved.
Additionally, there is a higher frequency of imaging artefacts in the arterial phase when compared with extracellular agents.
High performance limiters are described in this paper for applications in high frequency ultrasound imaging systems.
In this paper, a new type of expander that utilizes power MOSFET components, which we call a power MOSFET-based expander, is introduced and evaluated for use in high frequency ultrasound imaging systems.
However, commercial high frequency ultrasound imaging systems cannot currently provide its full capability for ophthalmic applications because either single element or annular array transducers are used in conjunction with mechanical scanning.
The present study examines the effects of each of these components on longitudinal sliding of the median nerve using high frequency ultrasound imaging in asymptomatic normal subjects.
