Sigmund Frigstad

Improvements to, or relating to contrast agents in ultrasound image representation

Jonny Østensen, Morten Eriksen, Sigmund Frigstad, 1997 .

An automated bladder volume measurement algorithm by pixel classification using random forests

Pavan Annangi, Sigmund Frigstad, S B Subin, 2016, EMBC.

Improvements to, or relating to contrast agents

Jonny Østensen, Sigmund Frigstad, Pal Rongved, 1997 .

Automated Interventricular Septum Thickness Measurement from B-Mode Echocardiograms

Anand Narasimhamurthy, Dirk R. Padfield, Navneeth Subramanian, 2010, MICCAI.

An automated bladder volume measurement algorithm by pixel classification using random forests

Pavan Annangi, Sigmund Frigstad, Anders Torp, 2016, 2016 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC).

Automatic timing of aortic valve closure in apical tissue Doppler images.

Hans Torp, Svein Arne Aase, Sigmund Frigstad, 2006, Ultrasound in medicine & biology.

Accurate and reproducible measurement of left ventricular volume and ejection fraction by contrast echocardiography: a comparison with magnetic resonance imaging.

Sigmund Frigstad, T. Skjaerpe, H. Larsson, 2004, Journal of the American College of Cardiology.

Improved contrast to tissue ratio at higher harmonics.

Nico de Jong, Ayache Bouakaz, Folkert J Ten Cate, 2002, Ultrasonics.

Real-time simultaneous triplane contrast echocardiography gives rapid, accurate, and reproducible assessment of left ventricular volumes and ejection fraction: a comparison with magnetic resonance imaging.

Sigmund Frigstad, S. Frigstad, P. A. Steen, 2006, Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography.