Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Sevald Berg"'
Autor:
Sevald Berg, Bjørn Olav Haugen, Stig A. Slørdahl, Stein Samstad, Terje Skjærpe, K.M. Brecke, Hans Torp
Publikováno v:
European Journal of Echocardiography. 1:252-256
Aims: To describe the mitral blood flow velocity distribution, we applied a freehand dynamic three-dimensional (3D) colour flow method using a moving sample surface that followed the mitral apparatus during diastole. Methods: Nineteen healthy volunte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d35db3c11e12ff94f8ec1f102bb369d5
https://doi.org/10.1053/euje.2000.0041
https://doi.org/10.1053/euje.2000.0041
Autor:
Bjørn Olav Haugen, Sevald Berg, Stig A. Slørdahl, K.M. Brecke, Hans Torp, Terje Skjærpe, Stein Samstad
Publikováno v:
European Journal of Echocardiography. 1:204-212
Aims: To validate a new three-dimensional (3D) colour flow method used to calculate cardiac output (CO) in aortic and mitral blood flow. Methods: The transducer was freely tilted transthoracically using a magnetic locating device recording its spatia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e47badde78252843d2e86aef442b5101
https://doi.org/10.1053/euje.2000.0044
https://doi.org/10.1053/euje.2000.0044
Publikováno v:
Journal of the American Society of Echocardiography. 13:0393-0402
We describe a new method for measuring blood volume flow with the use of freehand dynamic 3-dimensional echocardiography. During 10 to 20 cardiac cycles, the ultrasonographic probe was slowly tilted while its spatial position was continuously recorde
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::046b6041c774bbd1facf7b3855843de5
https://doi.org/10.1067/mje.2000.104264
https://doi.org/10.1067/mje.2000.104264
Publikováno v:
Ultrasound in Medicine & Biology. 26:425-432
We describe an ultrasound probe for three-dimensional transvaginal imaging. The transducer was an annular array with a center frequency of 7.5 MHz which was rotated with an internal stepper motor. The probe had no external moving parts, and the total
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::78ed4308ad12b6202622398f36e89cad
https://doi.org/10.1016/s0301-5629(99)00154-4
https://doi.org/10.1016/s0301-5629(99)00154-4
Autor:
Stein Samstad, Bjørn Olav Haugen, Terje Skjærpe, Hans Torp, Stig A. Slørdahl, Sevald Berg, Kjell Morten Brecke
Publikováno v:
Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography. 15(4)
Background: The use of a single sample volume in Doppler measurements of the velocity time integral (VTI) in the aortic annulus may introduce errors in calculations of stroke volumes, shunts, regurgitant fractions, and aortic valve area. To study the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::62bb276809d0d10a6c18f1072cbfc385
https://pubmed.ncbi.nlm.nih.gov/11944010
https://pubmed.ncbi.nlm.nih.gov/11944010
Publikováno v:
Bailliere's best practiceresearch. Clinical obstetricsgynaecology. 14(4)
Three-dimensional (3D) imaging by ultrasound was proposed in the 1950s. Since the end of the 1980s, 3D ultrasound has become a major field of research in obstetrics and gynaecology. The technique of acquiring 3D data involves making a set of consecut
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::45eb34f9b85824254aa158af7ae648e1
https://pubmed.ncbi.nlm.nih.gov/10985934
https://pubmed.ncbi.nlm.nih.gov/10985934
Publikováno v:
Lancet (London, England). 352(9135)
Summary Background Three-dimensional (3D) imaging of the living human embryo has become possible in the monitoring of embryological development, as described by classic human embryology. We aimed to create 3D images of organs in embryos on early preg
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4c1dc0835b37408cd11e1960c4b134cb
https://pubmed.ncbi.nlm.nih.gov/9777835
https://pubmed.ncbi.nlm.nih.gov/9777835
Publikováno v:
SPIE Proceedings.
The study of cardiac activation dynamics is an important factor in the characterization of the cardiac function. One such example is the localization of WPW-pathways inside the myocardium. Accurate localization of these pathways can be used to determ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c2bd5152706a0fa0686527f5362f697
https://doi.org/10.1117/12.274056
https://doi.org/10.1117/12.274056
Autor:
Bjoern Olstad, Sevald Berg
Publikováno v:
SPIE Proceedings.
In this paper we adapt the framework of a new class of nonlinear digital filters based on fuzzy connected neighborhoods to medical imaging and compare it with other families of digital image filters. An introduction to filters based on fuzzy neighbor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1b8a015af7b644f1430d4516dfade837
https://doi.org/10.1117/12.274077
https://doi.org/10.1117/12.274077
Publikováno v:
SPIE Proceedings.
Echocardiography is used for detection and analysis of heart dysfunction. Different techniques have been used to quantify wall motion, but so far no gold standard has emerged. The purpose of this study is to improve the echocardiographic quantitative
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c4df5ab1fc46d1bad7efe46e4e9f255a
https://doi.org/10.1117/12.237883
https://doi.org/10.1117/12.237883