The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The PMN-PT based high-frequency side-looking focused IVUS transducers were fabricated successfully by a mechanical dimpling technique and their performance was tested. Compared to the flat transducer, the focused transducer with 31 MHz center frequency showed superior −6 dB bandwidth (52%) and axial/lateral resolutions (28/470 µm). However, the average insertion loss of focused transducer at 35 MHz...
Although the coupled dictionary pair is jointly trained for image super-resolution, the sparse representations corresponding to the low resolution patches and high resolution patches are inconsistent. Therefore, we propose a sparse embedding method to establish the mapping relationship of the sparse representation. The manifold spaces of the sparse representations between the low resolution patches...
Micro-ultrasound is an invaluable imaging tool for many clinical and preclinical applications with high resolution (about several tens microns). The imaging systems for micro-ultrasound are developed extensively in recent years including single element imaging systems, and linear array imaging systems. This paper presents the development of a novel programmable and real-time annular array imaging...
In this paper, we report recent progress that has been made in the development of a high frame rate duplex HF ultrasound system with both B-scan imaging and Doppler flow measurements. A 32-channel HF analog beamformer module with transmitting focusing and dynamic focusing on reception was implemented. High-speed timing circuits were used to achieve high imaging frame rate by reducing the acquisition...
The zebrafish has emerged as an excellent model organism for studies of cardiovascular development due to its optical transparency and external development during embryogenesis. However, to understand the cardiovascular structure and function beyond the early stage development requires a high-resolution, real-time, non-invasive imaging alternative due to the opacity of adult zebrafish. In this paper,...
Small animals, especially mice, have become widely used models for studies of genes and human diseases. For cardiac imaging in mice, whose hearts beat at a rate higher than 300 beats per minute, the spatial and temporal resolution of current clinical ultrasonic scanners are far from ideal and simply inadequate for such applications. In this research, a real-time high frequency (30-50 MHz) ultrasound...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.