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- Solveig Fadnes, Ingvild Kinn Ekroll, Siri Ann Nyrnes, Hans Torp, Lasse Lovstakken
- IEEE Transactions on Ultrasonics, Ferroelectricsâ€¦
- 2015

Two-dimensional blood velocity estimation has shown potential to solve the angle-dependency of conventional ultrasound flow imaging. Clutter filtering, however, remains a major challenge for largeâ€¦ (More)

- Bastien Denarie, Thor Andreas Tangen, +4 authors Lasse LÃ¸vstakken
- IEEE Transactions on Medical Imaging
- 2013

Coherent plane wave compounding is a promising technique for achieving very high frame rate imaging without compromising image quality or penetration. However, this approach relies on the hypothesisâ€¦ (More)

- Tonje Dobrowen Fredriksen, Ingvild Kinn Ekroll, Lasse Lovstakken, Hans Torp
- 2012 IEEE International Ultrasonics Symposium
- 2012

Transit time broadening is a major limitation in Pulsed Wave (PW) Doppler, especially when the angle between the flow direction and the ultrasound beam is large. The limited frequency resolution mayâ€¦ (More)

- Ingvild Kinn Ekroll, Marco M. Voormolen, Oyvind K.-V Standal, Jochen Matthias Rau, Lasse Lovstakken
- 2014 IEEE International Ultrasonics Symposium
- 2014

The influence of blood motion on the accuracy of coherent compounding Doppler imaging is investigated. A simplified model for the compounded Doppler signal is proposed. The model is used to show thatâ€¦ (More)

- Ingvild Kinn Ekroll, Jørgen Avdal, Abigail Swillens, Hans Torp, Lasse Lovstakken
- IEEE Transactions on Ultrasonics, Ferroelectricsâ€¦
- 2016

An extended least squares method for robust, angle-independent 2-D vector velocity estimation using plane-wave ultrasound imaging is presented. The method utilizes a combination of least squaresâ€¦ (More)

- Alfonso Rodriguez-Molares, Lasse LÃ¸vstakken, Ingvild Kinn Ekroll, Hans Torp
- The Journal of the Acoustical Society of America
- 2015

A method is presented to reconstruct the geometry of specular reflectors with an ultrasonic array based on the image source principle. The ultrasonic beam is focused at a point in space emulating aâ€¦ (More)

- Ingvild Kinn Ekroll, TorbjÃ¸rn S. Dahl, Hans Torp, Lasse LÃ¸vstakken
- Ultrasound in medicine & biology
- 2014

Color flow imaging and pulsed wave (PW) Doppler are important diagnostic tools in the examination of patients with carotid artery disease. However, measurement of the true peak systolic velocity isâ€¦ (More)

- Jørgen Avdal, Ingvild Kinn Ekroll, Lasse Lovstakken, Hans Torp
- 2016 IEEE International Ultrasonics Symposiumâ€¦
- 2016

The maximum velocity of blood flow is the primary means for determining the degree of stenosis in the carotid artery. The current standard for estimating the maximum velocity is Pulsed Wave (PW)â€¦ (More)

- Solveig Fadnes, Ingvild Kinn Ekroll, Siri Ann Nyrnes, Hans Torp, Lasse Lovstakken
- 2014 IEEE International Ultrasonics Symposium
- 2014

Two-dimensional blood velocity estimation has shown potential to solve the angle-dependency of conventional ultrasound flow imaging. Clutter filtering, however, remains a major challenge for largeâ€¦ (More)

- Jørgen Avdal, Lasse Løvstakken, Hans Torp, Ingvild Kinn Ekroll
- IEEE Transactions on Ultrasonics, Ferroelectricsâ€¦
- 2017

Measurement of the maximum blood flow velocity is the primary means for determining the degree of carotid stenosis using ultrasound. The current standard for estimating the maximum velocity isâ€¦ (More)