Zobrazeno 1 - 10
of 86
pro vyhledávání: '"Hans W. Persson"'
Autor:
Thomas Kahan, Peter Henriksson, Johan Löfsjögård, Begoña López, Märit Mejhert, Arantxa González, Javier Díez, Magnus Edner, Hans W. Persson
Publikováno v:
Journal of Cardiovascular Medicine. 15:463-469
AIMS Myocardial collagen metabolism can be assessed indirectly by circulating biomarkers. We aimed to examine associations between myocardial collagen type I synthesis and degradation, and echocardiographic, clinical, and B-type natriuretic peptide (
Publikováno v:
The Journal of the Acoustical Society of America. 140(4)
Scatterer size estimation is useful when characterizing tissue using ultrasound. In all previous studies on scatterer size, the estimations are performed in the frequency domain and are thus subjected to a trade off in time-frequency resolution. This
Autor:
Magnus Cinthio, Maria Evertsson, Tomas Jansson, Hans W. Persson, Fredrik Olsson, Sarah Fredriksson
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 60:481-491
It has recently been demonstrated that superparamagnetic iron oxide nanoparticles can be used as magnetomotive ultrasound contrast agents. A time-varying external magnetic field acts to move the particles and, thus, the nanoparticle-laden tissue. How
Publikováno v:
Ultrasound in Medicine & Biology. 38:916-925
Using an in-house developed ultrasonic method, we have shown that there is distinct longitudinal multiphasic displacement of the human common carotid artery (CCA) wall during the cardiac cycle. Different subjects showed markedly different patterns of
Autor:
Monica Almqvist, Josefin Starkhammar, Johan Nilsson, Hans W. Persson, Mats Amundin, Tomas Jansson
Publikováno v:
Open Journal of Acoustics. :121-130
This paper describes in depth the design and application considerations of a computer based measurement system enabling 1 MS/s simultaneous sampling of 47 hydrophones for cross sectional recordings of echolocation beams of toothed whales (Odontocetes
Autor:
Hans W. Persson, Maria Evertsson, Tomas Jansson, Roger Andersson, Sarah Fredriksson, Magnus Cinthio, Hanna Toftevall, Pontus Kjellman
Publikováno v:
2015 IEEE International Ultrasonics Symposium (IUS).
The drive to gain a better understanding of how diseases arise and how to provide ever-earlier detection are some of the key factors for the development of molecular imaging. Compared to other imaging modalities ultrasound has not received the same a
Separating overlapping click trains originating from multiple individuals in echolocation recordings
Autor:
Stan A. Kuczaj, Hans W. Persson, Johan Nilsson, Monica Almqvist, Josefin Starkhammar, Mats Amundin
Publikováno v:
The Journal of the Acoustical Society of America. 129:458-466
Recordings of the acoustic activity of free-swimming groups of echolocating dolphins increase the likelihood of collecting overlapping click trains, originating from multiple individuals, in the same set of data. In order to evaluate the click proper
Publikováno v:
Ultrasound in Medicine & Biology. 36:1504-1512
Arterial diameter change is related to distending blood pressure and is used in estimation of arterial stiffness parameters. A common technique to track the arterial walls is by integration of wall velocities estimated by different methods using cros
Autor:
Tomas Jansson, Monica Almqvist, Josefin Starkhammar, Hans W. Persson, Stan A. Kuczaj, Mats Amundin, Johan Nilsson
Publikováno v:
The Journal of the Acoustical Society of America. 126:959-962
Detailed echolocation behavior studies on free-swimming dolphins require a measurement system that incorporates multiple hydrophones (often >16). However, the high data flow rate of previous systems has limited their usefulness since only minute long
Autor:
Åsa Rydén Ahlgren, Magnus Cinthio, Kjell Lindström, Stig Steen, Trygve Sjöberg, Hans W. Persson
Publikováno v:
Clinical Physiology and Functional Imaging. 29:353-359
Using ultrasound we recently demonstrated that in central elastic arteries as well as in large muscular arteries in humans there is a distinct longitudinal displacement of the arterial wall during the cardiac cycle. Further, for the first time, we al