Zobrazeno 1 - 10
of 21
pro vyhledávání: '"J. F. Gelly"'
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 53:209-223
Micro-machined ultrasonic transducers (MUT) appear as an attractive alternative to standard bulk transducers mainly based on PZT ceramic actuators. However, the simulation of these new devices requires one to take correctly into account their operati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5501237f528ef0ef8bc8423724621948
https://doi.org/10.1109/tuffc.2006.1588407
https://doi.org/10.1109/tuffc.2006.1588407
Autor:
Alexandre Reinhardt, M. Wilm, Sylvain Ballandras, F. Lanteri, O. Burat, William Daniau, R. Armati, R. Lardat, J.-F. Gelly, Vincent Laude
Publikováno v:
IEEE Symposium on Ultrasonics, 2003.
A model based on the combination of finite-element analysis and boundary-element method is presented to address the problem of periodic transducers radiating in stratified media mixing fluids and solids. The mathematical principle of the computation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5acc6bd90f85aa5fd18d1c729d13340b
https://doi.org/10.1109/ultsym.2003.1293228
https://doi.org/10.1109/ultsym.2003.1293228
Publikováno v:
IEEE Ultrasonics Symposium Proc
IEEE Ultrasonics Symposium Proc, 2004
IEEE Ultrasonics Symposium Proc, 2004
Many works have been devoted to the estimation of crosstalk effects in one-dimensional ultrasound probes. The main aspect limiting the interest of these works concerns the lack of control of the electrical boundary conditions applied to the array whi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3bb7994f82f6f9f324da81a6bad563fd
https://hal.archives-ouvertes.fr/hal-00135778
https://hal.archives-ouvertes.fr/hal-00135778
Autor:
M. Solal, J.-F. Gelly
Publikováno v:
IEEE 1988 Ultrasonics Symposium Proceedings..
The design of a medical acoustic array for a given echographic system is often a compromise between the lateral resolution and the grating sidelobe level. For a fixed number of active channels, the only way to decrease the grating sidelobe level is t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a7eb1bb200e4112c5b2f097d29518f2e
https://doi.org/10.1109/ultsym.1988.49458
https://doi.org/10.1109/ultsym.1988.49458
Publikováno v:
IEEE 1992 Ultrasonics Symposium Proceedings.
The crosstalk between the elements of an acoustical array is a major cause of limitation of performance, when the pitch is around or below the wavelength. An accurate modelization of the mechanical part of the crosstalk can be obtained by finite elem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7366b78a0e283144a50ad2f62ab3ea41
https://doi.org/10.1109/ultsym.1992.275935
https://doi.org/10.1109/ultsym.1992.275935
Publikováno v:
IEEE Symposium on Ultrasonics.
Current transducers used in medical ultrasound imaging generally use a single bandpass for both echo-amplitude imaging and color flow mapping (CFM). A novel acoustic design is presented here which provides an additional bandpass at half the frequency
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7bf311ebcef53392f031be927eff4097
https://doi.org/10.1109/ultsym.1990.171475
https://doi.org/10.1109/ultsym.1990.171475
Autor:
W. Steichen, J.-F. Gelly
Publikováno v:
1998 IEEE Ultrasonics Symposium. Proceedings (Cat. No. 98CH36102).
Many phenomena may alter the measured spectral response of a probe. Obvious ones are transmitter pulse spectrum or hydrophone sensitivity. Less obvious is the diffraction effect due to finite aperture and lens. If measurements are not made at the geo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b837330560ae11ebd81c992fdfd9a6c7
https://doi.org/10.1109/ultsym.1998.764976
https://doi.org/10.1109/ultsym.1998.764976
Publikováno v:
Microtechnologies in Medicine and Biology, 1st Annual International, Conference
Microtechnologies in Medicine and Biology, 1st Annual International, Conference, 2000, Lyon, France. pp.97-100, ⟨10.1109/MMB.2000.893750⟩
Microtechnologies in Medicine and Biology, 1st Annual International, Conference, 2000, Lyon, France. pp.97-100, ⟨10.1109/MMB.2000.893750⟩
The development of new Micromachined Ultrasound Transducers (MUT) for medical imaging or Non Destructive Evaluation (NDE) has been allowed by the vulgarization of MicroElectroMechanical Systems (MEMS) technologies. The possibility to massively produc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::80cfd2b01c3e1d981bbd551e2bbd0652
https://hal.archives-ouvertes.fr/hal-00009124
https://hal.archives-ouvertes.fr/hal-00009124
Publikováno v:
Acoustical Imaging ISBN: 9781461346876
Imaging capability of an active acoustic imaging system in an incoherent homogeneous medium is characterized by a Contrast Figure of Merit (CFM) defined as the incoherent energy entering the mainlobe of the beampattern over the incoherent energy ente
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e5c9d3aec08fb98bb548091454666ae8
https://doi.org/10.1007/978-1-4419-8772-3_76
https://doi.org/10.1007/978-1-4419-8772-3_76
Publikováno v:
Acoustical Imaging ISBN: 9781468439465
We describe an acoustical focusing imaging device specially designed for the study of diffused back scattering in the case of objects with very low roughness in comparison to the wavelength (such as machined metallic immersed objects).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d2b392ef1ffa994b5867a99b23356b78
https://doi.org/10.1007/978-1-4684-3944-1_38
https://doi.org/10.1007/978-1-4684-3944-1_38