Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Erik Normann Steen"'
Autor:
Svein Arne Aase, Erik Normann Steen, Pavan Annangi, Hariharan Ravishankar, Bjastaad Tore, Rohan Patil
Publikováno v:
2020 IEEE International Ultrasonics Symposium (IUS).
Ultrasound image acquisition is often not repeatable with dependency on the skill of the operator to both acquire and optimize ultrasound images. Beyond arriving at the right scan planes, the user has to optimize a series of acquisition parameters li
Publikováno v:
IEEE transactions on ultrasonics, ferroelectrics, and frequency control. 67(12)
Electrocardiogram (ECG) is often used together with a spectral Doppler ultrasound to separate heart cycles by determining the end-diastole locations. However, the ECG signal is not always recorded. In such cases, the cardiac cycles can be estimated m
Publikováno v:
Biomedical Signal Processing and Control. 58:101863
The temporal resolution of echocardiographic sequences affects the interpretation of cardiac motion as well as the viewing experience. Temporal resolution, however, is limited by the propagation velocity of sound in tissue. Altering the acquisition s
Publikováno v:
IEEE transactions on ultrasonics, ferroelectrics, and frequency control. 64(6)
In this paper, we propose a multiscale nonlocal means-based despeckling method for medical ultrasound. The multiscale approach leads to large computational savings and improves despeckling results over single-scale iterative approaches. We present tw
Autor:
Lars Hofsoy Breivik, Sten Roar Snare, Hani Nozari Mirarkolaei, Erik Normann Steen, Anne H. Schistad Solberg
Publikováno v:
2014 IEEE International Ultrasonics Symposium.
Speckle noise is inherent in ultrasound imaging where it causes reduced contrast resolution and degrades the detectability of small structures. In this paper we propose a real-time multiscale despeckling filter based on the recently proposed Nonlocal
Autor:
Sten Roar Snare, Lars Hofsoy Breivik, Erik Normann Steen, Hani Nozari Mirarkolaei, Anne H. Schistad Solberg
Publikováno v:
2014 IEEE International Ultrasonics Symposium.
Frame rate up conversion in a low frame rate cardiac ultrasound scan makes the images run smoother and potentially increases the diagnostic value of the scan. Linear interpolation is one way of increasing frame rate; however, ghosting and blurring ar
Publikováno v:
SPIE Proceedings.
In this paper we introduce and investigate an adaptive direct volume rendering (DVR) method for real-time visualization of cardiac 3D ultrasound. DVR is commonly used in cardiac ultrasound to visualize interfaces between tissue and blood. However, th
Publikováno v:
2010 IEEE International Ultrasonics Symposium.
Since real-time acquisition of 3D echocardiographic data is achievable in practice, many volume rendering algorithms have been proposed for visualization purposes. However, due to the large amounts of data and computations involved a tradeoff between
Publikováno v:
IEEE Ultrasonics Symposium, 2005..
Three-dimensional (3D) echocardiography is chal- lenging due to limitation of the data acquisition rate caused by the speed of sound. ECG-gated stitching of data from several cardiac cycles is a possible technique to achieve higher resolution. The ai
Autor:
Erik Normann Steen, Asbjørn Støylen, Stein Inge Rabben, Svein Brekke, Asbjørn Haugen, Geir U. Haugen, Hans Torp
Publikováno v:
Ultrasound in medicinebiology. 33(5)
Three-dimensional (3D) echocardiography is challenging due to limitation of the data acquisition rate caused by the speed of sound. ECG-gated stitching of data from several cardiac cycles is a possible technique to achieve higher resolution. The aim