Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Steinar Bjaerum"'
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 62:2079-2091
Blood speckle tracking has shown potential for solving the angle-dependency limitation in color flow imaging. However, as clutter filtering is still Doppler-based, flow velocities at near-perpendicular beam-to-flow angles can be severely attenuated.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e5978ab6fc15ba2b82f77a82a4286700
https://doi.org/10.1109/tuffc.2015.007247
https://doi.org/10.1109/tuffc.2015.007247
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 49:204-216
For ultrasound color flow images with high quality, it is important to suppress the clutter signals originating from stationary and slowly moving tissue sufficiently. Without sufficient clutter rejection, low velocity blood flow cannot be measured, a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::df05c44438773d4d2291952a926ed875
https://doi.org/10.1109/58.985705
https://doi.org/10.1109/58.985705
Publikováno v:
Journal of the American Society of Echocardiography. 14:50-56
A new Doppler method was developed to evaluate the instantaneous cross-sectional velocity profile variability in the left ventricular outlet tract in patients with atrial fibrillation. Blood flow velocities acquired at a high frame rate (90 frames/s)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9e4b2bf62935874e004fd9221f4c0267
https://doi.org/10.1067/mje.2001.108504
https://doi.org/10.1067/mje.2001.108504
Autor:
Hans Garmann Torp, Steinar Bjaerum
Publikováno v:
Ultrasonics. 38:376-380
The filter used to separate blood signals from the tissue clutter signal is an important part of a color flow system. In this paper, statistical detection theory is used to evaluate the quality of the most commonly used clutter filters. The probabili
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ded94922d75b5b860928d6ce81f8272
https://doi.org/10.1016/s0041-624x(99)00153-5
https://doi.org/10.1016/s0041-624x(99)00153-5
Publikováno v:
IEEE transactions on ultrasonics, ferroelectrics, and frequency control. 53(9)
We propose a new algorithm for real-time, adaptive-clutter-rejection filtering in ultrasound color flow imaging (CFI) and related techniques. The algorithm is based on regression filtering using eigenvectors of the signal correlation matrix as a basi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f42f2ddb4b710030029b85ea1dddc9c0
https://pubmed.ncbi.nlm.nih.gov/16964910
https://pubmed.ncbi.nlm.nih.gov/16964910
Publikováno v:
IEEE transactions on ultrasonics, ferroelectrics, and frequency control. 53(2)
This paper presents a new method for the visualization of two-dimensional (2-D) blood flow in ultrasound imaging systems called blood flow imaging (BFI). Conventional methods of color flow imaging (CFI) and power Doppler (PD) techniques are limited a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::9c1181abdf4d0840488d3d5652e7cdc5
https://pubmed.ncbi.nlm.nih.gov/16529103
https://pubmed.ncbi.nlm.nih.gov/16529103
Publikováno v:
2006 IEEE Ultrasonics Symposium.
In color flow imaging (CFI), the rejection of tissue clutter signal is treated separately from blood velocity estimation, by high-pass filtering the received Doppler signal. The complete suppression of clutter is then difficult to achieve without aff
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::275dbce91bc4d2488b710d32820b8f39
https://doi.org/10.1109/ultsym.2006.583
https://doi.org/10.1109/ultsym.2006.583
Publikováno v:
IEEE Ultrasonics Symposium, 2004.
This paper describes the performance of a real-time implementation of blood motion imaging (BMI), a new method for 2D blood flow visualization. BMI is a qualitative technique for presenting blood flow in any direction, achieved by preservation, enhan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3bdcbca16b03717754c171bcf7113b76
https://doi.org/10.1109/ultsym.2004.1417797
https://doi.org/10.1109/ultsym.2004.1417797
Publikováno v:
IEEE Symposium on Ultrasonics, 2003.
In ultrasound Color Doppler imaging, a grayscale B-mode image and a Doppler image representing velocities are overlaid to produce a color coded image of e.g. blood flow or myocardial movement. Normally, the B-mode and Doppler images are acquired at t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::24578ba5cc159d401c8ec97abad77f96
https://doi.org/10.1109/ultsym.2003.1293298
https://doi.org/10.1109/ultsym.2003.1293298
Publikováno v:
2002 IEEE Ultrasonics Symposium, 2002. Proceedings..
In this study we present new signal processing algorithms for visualization of blood flow in ultrasound imaging systems. Color flow systems produce each image from packets of typically 5-15 pulses transmitted along each scan line in the image. The Do
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8e74fa3a47310dcb0637bb19b8b28b7c
https://doi.org/10.1109/ultsym.2002.1192583
https://doi.org/10.1109/ultsym.2002.1192583