Results 221 to 230 of about 90,992 (266)

Nonlinearity parameter for tissue-mimicking materials

Ultrasound in Medicine & Biology, 1999
A finite amplitude insert-substitution method has been used to determine the ultrasonic nonlinearity parameter B/A of nine versions of water-based, macroscopically uniform ultrasonically tissue-mimicking (TM) nonfat and fat materials. In this method, the amplitude of the second harmonic following transmission through degassed distilled water with known
F, Dong, E L, Madsen, M C, MacDonald, J A, Zagzebski   +3 more
openaire   +2 more sources

Tissue mimicking materials for ultrasound phantoms

Medical Physics, 1978
Up until now, no material has been found whose attenuation and speed of sound properties not only mimic those of human soft tissue, but are controllable in magnitude. We have discovered such a material in the form of water‐based pharmaceutical gels containing uniform distributions of graphite powder and known concentrations of alcohol. The magnitude of
E L, Madsen, J A, Zagzebski, R A, Banjavie, R E, Jutila   +3 more
openaire   +2 more sources

Focused transducer beams in tissue‐mimicking material

Journal of Clinical Ultrasound, 1982
AbstractA comparison is made between pulse echo response profiles obtained in water and profiles obtained in a tissue‐mimicking (TM) material for clinical ultrasound transducers. The TM material is assumed to provide a more accurate indication of actual beam profiles in soft tissue because of the presence of frequency‐dependent attenuation in the ...
J A, Zagzebski, R A, Banjavic, E L, Madsen, M, Schwabe   +3 more
openaire   +2 more sources

Acoustical characterization of polysaccharide polymers tissue-mimicking materials

Ultrasonics, 2015
Tissue-mimicking phantoms play a crucial role in medical ultrasound research because they can simulate biological soft tissues. In last years, many types of polymeric tissues have been proposed and characterized from an acoustical and a thermal point of view, but, rarely, a deep discussion about the quality of the measurements, in terms of the ...
Cuccaro, Rugiada, Musacchio, Chiara, Giuliano Albo, Paolo Alberto, Troia, Adriano, Lago, Simona   +4 more
openaire   +4 more sources

New tissue mimicking materials for ultrasound phantoms

IEEE Ultrasonics Symposium, 2005., 2006
A phantom of tissure-equivalent material is important for quality control of an ultrasound diag -nostic equipment. This paper deals with polyure -thane gel and oil gels for the tissure-equvalent materials. The sound velocities of the materials are from 1450 to 1550 m/s and the attenuations are less than 0.4 dB/cm MHz.
T. Kondo, M. Kitatuji, H. Kanda
openaire   +1 more source

A new tissue-mimicking material for phantoms

2015 IEEE International Ultrasonics Symposium (IUS), 2015
We present a tissue-mimicking material for the phantom of medical diagnostic instruments. Accurate testing of an instrument by phantoms requires a tissue-mimicking material that has the acoustic velocity, density, and attenuation defined in the International Electrotechnical Commission (IEC) standard, and furthermore the tissue-mimicking material must ...
Kazuishi Sato, Tomoji Yoshida, Toshio Kondo, Masahiko Taniguchi, Kazuhiro Yasukawa   +4 more
openaire   +1 more source

Tissue mimicking material for intravascular elasticity imaging

Proceedings of 18th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2002
The mechanical properties of agar-gelatin gels used to construct vessel mimicking phantoms for ultrasonic elasticity studies are investigated. Gels with varying compression moduli are made using a gelatin solution (8% by weight) with a variable amount of agar (1%-3% by weight). Carborundum particles were added as scattering material.
C.L. De Korte, E.I. Cespedes, A.F.W. Van der Steen, B. Norder, K. Te Nijenhuis   +4 more
openaire   +1 more source

Tofu as a tissue-mimicking material

Ultrasound in Medicine & Biology, 2001
The acoustic properties of one kind of tofu (soft, firm and extra-firm types) commercially available in grocery markets were measured. It was found that density, speed of sound and attenuation coefficient of tofu were close to those of some soft tissues.
openaire   +2 more sources

3D printing tissue-mimicking materials for realistic transseptal puncture models

Journal of the Mechanical Behavior of Biomedical Materials, 2020
Applications of additive manufacturing (commonly referred to as 3D printing) in direct fabrication of models for pre-surgical planning, functional testing, and medical training are on the rise. However, one current limitation to the accuracy of models for cardiovascular procedural training is a lack of printable materials that accurately mimic human ...
Lindsey B. Bezek, Matthew P. Cauchi, Raffaella De Vita, Jason R. Foerst, Christopher B. Williams   +4 more
openaire   +2 more sources

Tissue-mimicking Materials for various kind of Phantoms

2019 IEEE International Ultrasonics Symposium (IUS), 2019
We present a tissue-mimicking material for the phantom of medical diagnostic instruments. Accurate testing of an instrument by phantoms requires a tissue-mimicking material that has the acoustic velocity, density, and attenuation defined in the International Electrotechnical Commission (IEC) standard, and furthermore the tissue-mimicking material must ...
Kazuishi Sato, Masaki Suzuki, Tomoji Yoshida, Toshio Kondo, Takuya Kubo, Kohei Hamachi, Mashiko Taniguchi   +6 more
openaire   +1 more source