Search

Your search keyword '"Eckersley, Robert J"' showing total 363 results
Start Over Author "Eckersley, Robert J"
363 results on '"Eckersley, Robert J"'

1. Impact of aperture, depth, and acoustic clutter on performance of Coherent Multi-Transducer Ultrasound imaging

Author

Peralta, Laura, Ramalli, Alessandro, Reinwald, Michael, Eckersley, Robert J., and Hajnal, Joseph V.

Subjects
Physics - Medical Physics
Abstract

Transducers with larger aperture size are desirable in ultrasound imaging to improve resolution and image quality. A coherent multi-transducer ultrasound imaging system (CoMTUS) enables an extended effective aperture through coherent combination of multiple transducers. In this study, the discontinuous extended aperture created by CoMTUS and its performance for deep imaging and through layered-media are investigated by both simulations and experiments. Typical image quality metrics - resolution, contrast and contrast-to-noise ratio - are evaluated and compared with a standard single probe imaging system. Results suggest that, the image performance of CoMTUS depends on the relative spatial location of the arrays. The resulting effective aperture significantly improves resolution, while the separation between the arrays may degrade contrast. For a limited gap in the effective aperture (less than few centimetres), CoMTUS provides benefits to image quality compared to standard single probe imaging system. Overall, CoMTUS shows higher sensitivity and reduced loss of resolution with imaging depth. In general, CoMTUS imaging performance was unaffected when imaging through a layered-medium with different speed of sound values and resolution improved up to 80% at large imaging depths., Comment: 12 pages, 16 figures

Published
2020

2. Coherent Multi-Transducer Ultrasound Imaging

Author

Peralta, Laura, Gomez, Alberto, Luan, Ying, Kim, Baehyung, Hajnal, Joseph V., and Eckersley, Robert J.

Subjects
Physics - Medical Physics, Mechanics of deformable solids
Abstract

An extended aperture has the potential to greatly improve ultrasound imaging performance. This work extends the effective aperture size by coherently compounding the received radio frequency data from multiple transducers. A framework is developed in which an ultrasound imaging system consisting of $N$ synchronized matrix arrays, each with partly shared field of view, take turns to transmit plane waves. Only one individual transducer transmits at each time while all $N$ transducers simultaneously receive. The subwavelength localization accuracy required to combine information from multiple transducers is achieved without the use of any external tracking device. The method developed in this study is based on the study of the backscattered echoes received by the same transducer and resulting from a targeted scatterer point in the medium insonated by the multiple ultrasound probes of the system. The current transducer locations along with the speed of sound in the medium are deduced by optimizing the cross-correlation between these echoes. The method is demonstrated experimentally in 2-D using ultrasound point and anechoic lesion phantoms and a first demonstration of a free-hand experiment is also shown. Results demonstrate that the coherent multi-transducer imaging has the potential to improve ultrasound image quality, improving resolution and target detectability. Lateral resolution, contrast and contrast-to-noise ratio improved from 0.67 mm, -6.708 dB and 0.702, respectively, when using a single probe, to 0.18 mm, -7.251 dB and 0.721 in the coherent multi-transducer imaging case.

Published
2019
Full Text
View/download PDF

37. High-speed optical observations and simulation results of SonoVue microbubbles at low-pressure insonation

Author

Chetty, Kevin, Stride, Eleanor, Sennoga, Charles A., Hajnal, Joseph V., and Eckersley, Robert J.

Subjects
Microbubbles -- Models, Viscoelasticity -- Analysis, Diagnosis, Ultrasonic -- Equipment and supplies, Diagnosis, Ultrasonic -- Design and construction, Business, Electronics, Electronics and electrical industries
Abstract

An optical method is used for the parameterization of the Hoff model for SonoVue microbubbles. Findings reveal that the viscoelastic shell parameters of the microbubbles are dependent on their size.

Published
2008

40. Nonlinear propagation of ultrasound through microbubble contrast agents and implications for imaging

Author

Meng-Xing Tang and Eckersley, Robert J.

Subjects
Microbubbles -- Research, Diagnostic imaging -- Methods, Nonlinear theories -- Usage, Business, Electronics, Electronics and electrical industries
Abstract

Theoretical and experimental methods are used to explore the nonlinear propagation of ultrasound transmission through microbubbles from an imaging perspective and to quantify imaging errors caused by the nonlinear propagation. The simulation of nonlinear propagation is found to be consistent with experimental results.

Published
2006

43. Contributors

Author

Adam, Andy, primary, Adam, E. Jane, additional, Adams, Judith E., additional, Allison, David J., additional, Allison, Sandra, additional, Anslow, Philip, additional, Ascher, Susan M., additional, Aziz, Zelena A., additional, Bartram, Clive I., additional, Bearcroft, Philip P.W., additional, Belli, Anna-Maria, additional, Berendt, Anthony R., additional, Berman, Lol, additional, Blomley, Martin J.K., additional, Boles, Carol A., additional, Bomanji, Jamshed B., additional, Caseiras, Gisele Brasil, additional, Brown, Jackie E., additional, Caroline, Dina F., additional, Chang, Silvia D., additional, Chong, W.K. ‘Kling’, additional, Connolly, Bairbre, additional, Copley, Susan J., additional, Cosgrove, David O., additional, Cowan, Nigel, additional, Cross, Justin J., additional, Dalal, Paras, additional, Daskalogiannaki, Maria, additional, Davies, A. Mark, additional, Dixon, Adrian K., additional, Bruyn, Rose de, additional, Defilippi, Claudio, additional, Desai, Sujal R., additional, Eckersley, Robert J., additional, Evans, Andrew J., additional, Evanson, Jane, additional, Fender, Laura, additional, Freeman, Alan H., additional, Gates, Julia, additional, Gibson, Robert N., additional, Godwin, Raymond J., additional, Goldstone, Karen, additional, Goodman, Philip C., additional, Gordon, Isky, additional, Gourtsoyiannis, Nicholas, additional, Grainger, Ronald G., additional, Grainger, Andrew J., additional, Grenier, Philippe, additional, Gunny, Roxana S., additional, Hall, Christine M., additional, Hansell, David M., additional, Hartnell, George G., additional, Hricak, Hedvig, additional, Jackson, James E., additional, Jäger, H. Rolf, additional, James, Jonathan J., additional, Kendzierski, Renee M., additional, Koh, Dow-Mu, additional, Lang, Isla, additional, Lim, Adrian K.P., additional, Lomas, David J., additional, MacDonald, Sharyn L.S., additional, MacVicar, David, additional, Manhire, Adrian, additional, Massoud, Tarik F., additional, McHugh, Kieran, additional, Meaney, James, additional, Meire, Hylton B., additional, Miles, Kenneth A., additional, Mirvis, Stuart E., additional, Morcos, Sameh K., additional, Morgan, Robert A., additional, Morrison, Iain, additional, Müller, Nestor L., additional, Munneke, Graham, additional, Murray, Alison D., additional, Nakielny, Richard A., additional, Nath, Hrudaya, additional, Nicholson, Tony, additional, Offiah, Amaka C., additional, Padley, Simon, additional, Paley, Martyn N.J., additional, Papanikolaou, Nickolas, additional, Patel, Jai, additional, Paterson, Anne, additional, Peddu, Praveen, additional, Peters, A. Michael, additional, Ramsden, William H., additional, Rankin, Sheila, additional, Rao, Padma, additional, Reek, Christine, additional, Reynolds, John H., additional, Reznek, Rodney H., additional, Rich, Philip M., additional, Rockall, Andrea, additional, Roditi, Giles, additional, Rogers, Lee F., additional, Rottenberg, Giles, additional, Rout, John, additional, Rubens, Michael B., additional, Saifuddin, Asif, additional, Sala, Evis, additional, Sandhu, Caron, additional, Saunders, Dawn, additional, Scoffings, Daniel J., additional, Segerman, Djilda, additional, Shanmuganathan, Kathirkama, additional, Shaw, Ashley S., additional, Singh, Satinder P., additional, Sohaib, S. Aslam A., additional, Sprigg, Alan, additional, Stevens, John M., additional, Stoker, Dennis J., additional, Strickland, Nicola H., additional, Sweeney, Louise E., additional, Taljanovic, Mihra S., additional, Taylor, Andrew M., additional, Taylor, Stuart, additional, Thomsen, Henrik S., additional, Toma, Paolo, additional, Twining, Peter, additional, Verschakelen, John A., additional, Vinnicombe, Sarah J., additional, von Schulthess, Gustav K., additional, Wilkinson, Iain D., additional, Wilson, A. Robin M., additional, Wilson, David J., additional, and Yates, Stuart J., additional

Published
2008
Full Text
View/download PDF

48. 3-D Super-Resolution Ultrasound Imaging With a 2-D Sparse Array

Author

Harput, Sevan, primary, Christensen-Jeffries, Kirsten, additional, Ramalli, Alessandro, additional, Brown, Jemma, additional, Zhu, Jiaqi, additional, Zhang, Ge, additional, Leow, Chee Hau, additional, Toulemonde, Matthieu, additional, Boni, Enrico, additional, Tortoli, Piero, additional, Eckersley, Robert J., additional, Dunsby, Chris, additional, and Tang, Meng-Xing, additional

Published
2020
Full Text
View/download PDF

50. Contributors

Author

Abdalla, Eddie K., primary, Abou-Alfa, Ghassan K., additional, Adams, Reid B., additional, Adsay, N. Volkan, additional, Ahluwalia, Jatinder P., additional, Akhurst, Timothy, additional, Atwell, Thomas D., additional, Austin, Mary T., additional, Bassi, Claudio, additional, Becker, Christoph D., additional, Beckingham, Ian J., additional, Belghiti, Jacques, additional, Berne, Thomas V., additional, Bilchik, Anton J., additional, Binmoeller, Kenneth F., additional, Bismuth, Henri, additional, Blomley, Martin J.K., additional, Blumgart, Leslie H., additional, Bornman, P.C., additional, Brody, Lynn, additional, Broelsch, Christoph E., additional, Brown, Carlos V.R., additional, Brown, Karen T., additional, Brown, Melissa L., additional, Bruix, Jordi, additional, Brunt, Elizabeth M., additional, Büchler, Markus W., additional, Burroughs (Hon), Andrew K., additional, Butturini, Giovanni, additional, Cameron, Iain C., additional, Carloni, Alessio, additional, Carr-Locke, David L., additional, Cha, Charles, additional, Chapman, William C., additional, Chung, Jin Wook, additional, Cioni, Dania, additional, Conlon, Kevin C., additional, Correia, Mauro M., additional, Corvera, Carlos U., additional, Cosgrove, David O., additional, Covey, Anne M., additional, Angelica, Michael D', additional, Darcy, Michael, additional, Davison, Brian D., additional, DeCorato, Douglas R., additional, DeMatteo, Ronald P., additional, Demetriades, Demetrios, additional, Demetriou, Achilles A., additional, Desai, Niraj M., additional, Dhanireddy, Kiran K., additional, Diamond, Thomas, additional, Di Mola, Fabio F., additional, Di Sebastiano, Pierluigi, additional, Doyle, Majella, additional, Eckersley, Robert J., additional, Joseph Espat, N., additional, Fan, Sheung-Tat, additional, Farges, Olivier, additional, Castillo, Carlos Fernández-Del, additional, Fischer, Mary, additional, Fong, Yuman, additional, Friess, Helmut, additional, Fuster, Josep, additional, Garg, Nisha, additional, Gerdes, Hans, additional, Gertsch, Philippe, additional, Getradjman, George, additional, Gittes, George K., additional, Glasgow, Sean C., additional, Gondolesi, Gabriel E., additional, Goulis, John, additional, Gouma, Dirk J., additional, Halpern, Neil A., additional, Hann, Lucy E., additional, Hartwig, Werner, additional, Heffernan, Nancy, additional, Helton, William Scott, additional, Hemming, Alan W., additional, Henderson, J. Michael, additional, Ho, Choon-Kiat, additional, Ichai, Philippe, additional, Imamura, Hiroshi, additional, Imrie, C.W., additional, Jackson, James, additional, Janicki, Piotr K., additional, Jarnagin, William R., additional, Jenkins, Roger L., additional, Kahl, Stefan, additional, Kamiya, Junichi, additional, Kayaalp, Cuneyt, additional, Kelly, Colleen R., additional, Kemeny, Nancy E., additional, Kirk, Allan D., additional, Kitagawa, Yuichi, additional, Kleeff, Jörg, additional, Klimstra, David S., additional, Knechtle, Stuart J., additional, Kobayashi, Hiroyuki, additional, Kotru, Anil, additional, Krige, Jake E.J., additional, Ku, Yonson, additional, Kurtz, Robert C., additional, LaBrecque, Douglas R., additional, Lang, Hauke, additional, La Quaglia, Michael P., additional, Larusso, Nicholas F., additional, Lazaridis, K.N., additional, Lee, L.S., additional, Lencioni, Riccardo, additional, Liau, Kui Hin, additional, Lightdale, Charles J., additional, Lillemoe, Keith D., additional, Lin, James, additional, Linehan, David C., additional, Lipsett, Pamela A., additional, Llovett, Josep M., additional, Lowell, Jeffrey A., additional, Madoff, David C., additional, Maitra, Anirban, additional, Majeed, Ali W., additional, Makuuchi, Masatoshi, additional, Malfertheiner, Peter, additional, Marcos, Amadeo, additional, Markmann, James F., additional, Mathie, Robert T., additional, McAuliffe, Priscilla F., additional, McKay, Colin J., additional, Melendez, Jose A., additional, Moldawer, Lyle L., additional, Mole, Damian J., additional, Mönkemüller, Klaus, additional, Nagino, Masato, additional, Nagle, Alexander, additional, Nagorney, David M., additional, Nakakura, Eric K., additional, Nakeeb, Attila, additional, Neuberger, James, additional, Nimura, Yuji, additional, Nunes, Quentin M., additional, O'Grady, John G., additional, O'Laoide, Risteard, additional, Olthoff, Kim M., additional, Ong, Evan S., additional, Orloff, Marshall J., additional, Orloff, Mark S., additional, Orloff, Susan L., additional, Paradis, Valérie, additional, Passik, Steven D., additional, Peitgen, Heinz-Otto, additional, Pillarisetty, Venu, additional, Wright Pinson, C., additional, Pitt, Henry A., additional, Pomposelli, James J., additional, Poon, Ronnie T., additional, Prinz, Richard A., additional, Que, Florencia G., additional, Rikkers, Layton F., additional, Rowlands, Brian J., additional, Sala, Margarita, additional, Saldinger, Pierre F., additional, Salim, Ali, additional, Saltz, Leonard B., additional, Samonakis, Dimitrios N., additional, Samuel, Didier, additional, Sano, Tsuyoshi, additional, Sarmiento, Juan M., additional, Scatton, O., additional, Schattner, Mark, additional, Schmidt, Christian Max, additional, Schulick, Richard D., additional, Schwartz, Lawrence H., additional, Schwartz, Myron E., additional, Shepherd, Ross W., additional, Siddiqi, Nasir H., additional, Sigal, Samuel H., additional, Smajda, C., additional, Small, Aaron J., additional, Smith, Andrew M., additional, Soehendra, Nib, additional, Soper, Nathaniel J., additional, Starzl, Thomas E., additional, Steer, Michael, additional, Stevens, Peter D., additional, Strong, Russell W., additional, Stubbs, Richard S., additional, Takayama, Tadatoshi, additional, Taylor, Rebecca, additional, Teitcher, Jerrold, additional, Terpstra, Onno T., additional, Terraz, Sylvain, additional, Thomas, Philip G., additional, Thomas, William E.G., additional, Toouli, James, additional, Triantos, Christos K., additional, Tseng, Jennifer F., additional, Van Sonnenberg, Eric, additional, Varela, Maria, additional, Varma, Deepak, additional, Vauthey, Jean-Nicholas, additional, Verna, Elizabeth C., additional, Vilgrain, V., additional, Voigt, Louis, additional, Wagman, Raquel, additional, Wands, Jack R., additional, Wang, Han Lin, additional, Warshaw, Andrew L., additional, Weber, Kaare J., additional, Weber, Sharon, additional, Weitz, Jürgen, additional, Werner, Jens, additional, Wheatley, Anthony M., additional, Winston, Corinne, additional, Wizorek, Joseph J., additional, Wong, John, additional, Yeo, Charles J., additional, Yoon, Chang Jin, additional, Zimmerman, Arthur, additional, and Zogakis, Theresa G., additional

Published
2007
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results