Zobrazeno 1 - 10
of 102
pro vyhledávání: '"L. Filipczyński"'
Publikováno v:
Ultrasound in Medicine & Biology. 25:285-299
The effect of nonlinear propagation in fluid followed by soft tissue was studied both theoretically and experimentally for a most crucial case in obstetrical ultrasonography. For this purpose, short pressure pulses, with the duration time of 1.3 micr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb967f77a540527c54aa82203c86adef
https://doi.org/10.1016/s0301-5629(98)00174-4
https://doi.org/10.1016/s0301-5629(98)00174-4
Publikováno v:
Ultrasound in Medicine & Biology. 25:259-267
The authors computed temperature elevations in a three-layer and a four-layer tissue model, assuming the crucial obstetrical case when the ultrasonic pulse propagating through the abdominal wall and the fluid-filled bladder penetrates into soft fetal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5a57d1a63060227354cfeb3e3be26a98
https://doi.org/10.1016/s0301-5629(98)00144-6
https://doi.org/10.1016/s0301-5629(98)00144-6
Publikováno v:
Ultrasound in Medicine & Biology. 18:569-577
Based on measurements carried out in water in two lithotriptor systems, the authors have made an attempt to reconstruct numerically amplitudes and shapes of shock wave pulses penetrating into kidney which differ from those in water. The difference be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9efb484cbc5c03fcd4fe4bd8f61a0ea1
https://doi.org/10.1016/0301-5629(92)90071-h
https://doi.org/10.1016/0301-5629(92)90071-h
Autor:
Janusz Wójcik, Andrzej Nowicki, Peter A. Lewin, Philip E. Bloomfield, L. Filipczyński, Tamara Kujawska
Publikováno v:
Ultrasonics. 44(3)
A novel, free from paraxial approximation and computationally efficient numerical algorithm capable of predicting 4D acoustic fields in lossy and nonlinear media from arbitrary shaped sources (relevant to probes used in medical ultrasonic imaging and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ecd319ce36815ea0dc29ab1a3b681631
https://pubmed.ncbi.nlm.nih.gov/16780911
https://pubmed.ncbi.nlm.nih.gov/16780911
Publikováno v:
Ultrasound in medicinebiology. 30(1)
Imaging of living cells or tissues at a microscopic resolution, where GHz frequencies are used, provides a foundation for many new biological applications. The possible temperature increase causing a destructive influence on the living cells should b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::49ff15b20a9fab7c67aa19f0ebb4d3df
https://pubmed.ncbi.nlm.nih.gov/14962613
https://pubmed.ncbi.nlm.nih.gov/14962613
Publikováno v:
AIP Conference Proceedings.
Distortions of nonlinear pulses in water caused by measurements with PVDF and EM hydrophones are shown, corrected and compared with numerical results obtained by means of the WJ Code [7].
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2eed64181499981d9cadb8c40cad4962
https://doi.org/10.1063/1.1309186
https://doi.org/10.1063/1.1309186
Publikováno v:
Acoustical Imaging ISBN: 9781461346876
The purpose of the paper is to answer the question if and what kind of information can be obtained from the grey scale shadow of targets detected by means of short ultrasonic pulses. The theory of wave reflection from spherical obstacles was applied
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a960a220cc008282639dc9ae9f2c2965
https://doi.org/10.1007/978-1-4419-8772-3_34
https://doi.org/10.1007/978-1-4419-8772-3_34
Publikováno v:
Ultrasound in medicinebiology. 22(2)
The theory of wave reflection from spherical obstacles was applied for determination of the cause of the shadow created by plane wave pulses incident on rigid, steel, gaseous spheres and on spheres made of kidney stones. The spheres were immersed in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c41b53fcbfef63cb57f6aecd53419da2
https://pubmed.ncbi.nlm.nih.gov/8735535
https://pubmed.ncbi.nlm.nih.gov/8735535
Publikováno v:
Ultrasound in medicinebiology. 19(8)
Transient solution of the thermal conductivity equation for the three-dimensional case of the Gaussian ultrasonic focused beam was derived and applied for cases relevant to medical ultrasonography. Quantitative results for the case of a homogeneous m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d44f5f3e65105002d377479e392677a
https://pubmed.ncbi.nlm.nih.gov/8134971
https://pubmed.ncbi.nlm.nih.gov/8134971
Publikováno v:
Acoustical Imaging ISBN: 9781461364870
In many problems of hydroacoustics and in medical ultrasonics one obtains the shadow image which contains information about the detected target. However, the lack of simple quantitative relationships between the shadow and the target size does not al
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::269ba5be66ef63c1bfe6127408370024
https://doi.org/10.1007/978-1-4615-3370-2_22
https://doi.org/10.1007/978-1-4615-3370-2_22