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Hans Torp

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Anders Thorstensen; Hans Torp; Svein Arne Aase; Brage H Amundsen; Håvard Dalen; Pavel Hala; Gabriel Kiss; Asbjørn Støylen
Strain rate imaging combined with wall motion analysis gives incremental value in direct quantification of myocardial infarct size.
Sten Roar Snare; Håvard Dalen; Ole Christian Mjølstad; Fredrik Orderud; Hans Torp
Automated septum thickness measurement--a Kalman filter approach.
Sten Roar Snare; Ole Christian Mjølstad; Fredrik Orderud; Bjørn Olav Haugen; Hans Torp
Fast automatic measurement of mitral annulus excursion using a pocket-sized ultrasound system.

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2012: Anders Thorstensen; Hans Torp; Svein Arne Aase; Brage H Amundsen; Håvard Dalen; Pavel Hala; Gabriel Kiss; Asbjørn Støylen
Strain rate imaging combined with wall motion analysis gives incremental value in direct quantification of myocardial infarct size.
European heart journal cardiovascular Imaging 2012;13(11):914-21.
2012: Sten Roar Snare; Håvard Dalen; Ole Christian Mjølstad; Fredrik Orderud; Hans Torp
Automated septum thickness measurement--a Kalman filter approach.
Computer methods and programs in biomedicine 2012;108(2):477-86.
2011: Sten Roar Snare; Ole Christian Mjølstad; Fredrik Orderud; Bjørn Olav Haugen; Hans Torp
Fast automatic measurement of mitral annulus excursion using a pocket-sized ultrasound system.
Ultrasound in medicine & biology 2011;37(4):617-31.
2011: Svein Arne Aase; Sten Roar Snare; Håvard Dalen; Asbjørn Støylen; Fredrik Orderud; Hans Torp
Echocardiography without electrocardiogram.
European journal of echocardiography : the journal of the Working Group on Echocardiography of the European Society of Cardiology 2011;12(1):3-10.
2010: Siri Ann Nyrnes; Lasse Lovstakken; Eirik Skogvoll; Hans Torp; Bjørn Olav Haugen
Does a new ultrasound flow modality improve visualization of neonatal pulmonary veins?
Echocardiography (Mount Kisco, N.Y.) 2010;27(9):1113-9.
2010: Svein Arne Aase; Charlotte Björk-Ingul; Anders Thorstensen; Hans Torp; Asbjørn Støylen
Aortic valve closure: relation to tissue velocities by Doppler and speckle tracking in patients with infarction and at high heart rates.
Echocardiography (Mount Kisco, N.Y.) 2010;27(4):363-9.
2010: Havard Dalen; Anders Thorstensen; Svein Arne Aase; Charlotte B Ingul; Hans Torp; Lars J Vatten; Asbjorn Stoylen
Segmental and global longitudinal strain and strain rate based on echocardiography of 1266 healthy individuals: the HUNT study in Norway.
European journal of echocardiography : the journal of the Working Group on Echocardiography of the European Society of Cardiology 2010;11(2):176-83.
2010: Abigail Swillens; Patrick Segers; Hans Torp; Lasse Løvstakken
Two-dimensional blood velocity estimation with ultrasound: speckle tracking versus crossed-beam vector Doppler based on flow simulations in a carotid bifurcation model.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 2010;57(2):327-39.
2010: Thomas R Skaug; Torbjørn Hergum; Brage H Amundsen; Terje Skjaerpe; Hans Torp; Bjørn Olav Haugen
Quantification of mitral regurgitation using high pulse repetition frequency three-dimensional color Doppler.
Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography 2010;23(1):1-8.
2009: Martijn E Frijlink; Lasse Løvstakken; Hans Torp
Investigation of transmit and receive performance at the fundamental and third harmonic resonance frequency of a medical ultrasound transducer.
Ultrasonics 2009;49(8):601-4.
2009: Abigail Swillens; Thomas De Schryver; Lasse Løvstakken; Hans Torp; Patrick Segers
Assessment of numerical simulation strategies for ultrasonic color blood flow imaging, based on a computer and experimental model of the carotid artery.
Annals of biomedical engineering 2009;37(11):2188-99.
2009: Tore Bjåstad; Svein Arne Aase; Hans Torp
Synthetic transmit beam technique in an aberrating environment.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 2009;56(7):1340-51.
2009: Torbjørn Hergum; Stian Langeland; Espen W Remme; Hans Torp
Fast ultrasound imaging simulation in K-space.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 2009;56(6):1159-67.
2009: Torbjørn Hergum; Thomas Renhult Skaug; Knut Matre; Hans Torp
Quantification of valvular regurgitation area and geometry using HPRF 3-D Doppler.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 2009;56(5):975-82.
2009: Ottar Vasseljen; Anne M Fladmark; Christian Westad; Hans Torp
Onset in abdominal muscles recorded simultaneously by ultrasound imaging and intramuscular electromyography.
Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology 2009;19(2):e23-31.
2009: Jonas Crosby; Brage H Amundsen; Torbjørn Hergum; Espen W Remme; Stian Langeland; Hans Torp
3-D speckle tracking for assessment of regional left ventricular function.
Ultrasound in medicine & biology 2009;35(3):458-71.
2009: Brage H Amundsen; Jonas Crosby; Per Arvid Steen; Hans Torp; Stig A Slørdahl; Asbjørn Støylen
Regional myocardial long-axis strain and strain rate measured by different tissue Doppler and speckle tracking echocardiography methods: a comparison with tagged magnetic resonance imaging.
European journal of echocardiography : the journal of the Working Group on Echocardiography of the European Society of Cardiology 2009;10(2):229-37.
2008: Jonas Crosby; Brage H Amundsen; thomas helle-valle; Per Arvid Steen; Hans Torp
A new tissue Doppler method for examination of left ventricular rotation.
Ultrasound in medicine & biology 2008;34(11):1741-51.
2008: Lasse Lovstakken; Khalid S Ibrahim; Nicola Vitale; Siren Torsvik Henriksen; Idar Kirkeby-Garstad; Hans Torp; Rune Haaverstad
Blood flow imaging: a new two-dimensional ultrasound modality for enhanced intraoperative visualization of blood flow patterns in coronary anastomoses.
Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography 2008;21(8):969-75.
2008: Svein A Aase; Hans Torp; Asbjørn Støylen
Aortic valve closure: relation to tissue velocities by Doppler and speckle tracking in normal subjects.
European journal of echocardiography : the journal of the Working Group on Echocardiography of the European Society of Cardiology 2008;9(4):555-9.
2007: Siri Ann Nyrnes; Lasse Løvstakken; Hans Torp; Bjørn Olav Haugen
Blood flow imaging-a new angle-independent ultrasound modality for the visualization of flow in atrial septal defects in children.
Echocardiography (Mount Kisco, N.Y.) 2007;24(9):975-81.
2007: Svein Brekke; Stein Inge Rabben; Asbjørn Støylen; Asbjørn Haugen; Geir U Haugen; Erik N Steen; Hans Torp
Volume stitching in three-dimensional echocardiography: distortion analysis and extension to real time.
Ultrasound in medicine & biology 2007;33(5):782-96.
2007: Khalid S Ibrahim; Lasse Løvstakken; Idar Kirkeby-Garstad; Hans Torp; Harald Vik-Mo; Rune Haaverstad
Effect of the cardiac cycle on the coronary anastomosis assessed by ultrasound.
Asian cardiovascular & thoracic annals 2007;15(2):86-90.
2007: Lasse Løvstakken; Steinar Bjaerum; Hans Torp
Optimal velocity estimation in ultrasound color flow imaging in presence of clutter.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 2007;54(3):539-49.
2007: Torbjørn Hergum; Tore Bjåstad; Kjell Kristoffersen; Hans Torp
Parallel beamforming using synthetic transmit beams.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 2007;54(2):271-80.
2007: Tore Bjåstad; Svein Arne Aase; Hans Torp
The impact of aberration on high frame rate cardiac B-mode imaging.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 2007;54(1):32-41.
2006: Ottar Vasseljen; Haldis Haug Dahl; Paul Jarle Mork; Hans Torp
Muscle activity onset in the lumbar multifidus muscle recorded simultaneously by ultrasound imaging and intramuscular electromyography.
Clinical biomechanics (Bristol, Avon) 2006;21(9):905-13.
2006: Lasse Løvstakken; Steinar Bjaerum; Kjell Kristoffersen; Rune Haaverstad; Hans Torp
Real-time adaptive clutter rejection filtering in color flow imaging using power method iterations.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 2006;53(9):1597-608.
2006: H-G K Blaas; P Taipale; Hans Torp; Sturla H Eik-Nes
Three-dimensional ultrasound volume calculations of human embryos and young fetuses: a study on the volumetry of compound structures and its reproducibility.
Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology 2006;27(6):640-6.
2006: Svein Brekke; Charlotte Bjork Ingul; Svein Arne Aase; Hans Torp
Increasing frame rate in ultrasound imaging by temporal morphing using tissue Doppler.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 2006;53(5):936-46.
2006: Siri Malm; Sigmund Frigstad; Hans Torp; Rune Wiseth; Terje Skjarpe
Quantitative adenosine real-time myocardial contrast echocardiography for detection of angiographically significant coronary artery disease.
Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography 2006;19(4):365-72.
2006: Brage H Amundsen; thomas helle-valle; Thor Edvardsen; Hans Torp; Jonas Crosby; Erik Lyseggen; Asbjørn Støylen; Halfdan Ihlen; João A C Lima; Otto A Smiseth; Stig A Slørdahl
Noninvasive myocardial strain measurement by speckle tracking echocardiography: validation against sonomicrometry and tagged magnetic resonance imaging.
Journal of the American College of Cardiology 2006;47(4):789-93.
2006: Lasse Løvstakken; Steinar Bjaerum; Ditlef Martens; Hans Torp
Blood flow imaging--A new real-time, 2-D flow imaging technique.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 2006;53(2):289-99.
2006: Siri Malm; Sigmund Frigstad; Asbjorn Stoylen; Hans Torp; Einar Sagberg; Terje Skjarpe
Effects of ultrasound contrast during tissue velocity imaging on regional left ventricular velocity, strain, and strain rate measurements.
Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography 2006;19(1):40-7.
2006: Svein Arne Aase; Asbjorn Stoylen; Charlotte Bjork Ingul; Sigmund Frigstad; Hans Torp
Automatic timing of aortic valve closure in apical tissue Doppler images.
Ultrasound in medicine & biology 2006;32(1):19-27.
2005: thomas helle-valle; Jonas Crosby; Thor Edvardsen; Erik Lyseggen; Brage H Amundsen; Hans-Jørgen Smith; Boaz D Rosen; João A C Lima; Hans Torp; Halfdan Ihlen; Otto A Smiseth
New noninvasive method for assessment of left ventricular rotation: speckle tracking echocardiography.
Circulation 2005;112(20):3149-56.
2005: Charlotte Bjork Ingul; Hans Torp; Svein Arne Aase; Sigrid Berg; Asbjorn Stoylen; Stig A Slordahl
Automated analysis of strain rate and strain: feasibility and clinical implications.
Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography 2005;18(5):411-8.
2004: Svein Brekke; Eva Tegnander; Hans Torp; Sturla H Eik-Nes
Tissue Doppler gated (TDOG) dynamic three-dimensional ultrasound imaging of the fetal heart.
Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology 2004;24(2):192-8.
2003: Asbjørn Støylen; Charlotte Bjork Ingul; Hans Torp
Strain and strain rate parametric imaging. A new method for post processing to 3-/4-dimensional images from three standard apical planes. Preliminary data on feasibility, artefact and regional dyssynergy visualisation.
Cardiovascular ultrasound 2003;1():11.
2002: Rune Haaverstad; Nicola Vitale; Ole Tjomsland; Arve Tromsdal; Hans Torp; Stein O Samstad
Intraoperative color Doppler ultrasound assessment of LIMA-to-LAD anastomoses in off-pump coronary artery bypass grafting.
The Annals of thoracic surgery 2002;74(4):S1390-4.
2002: Steinar Bjaerum; Hans Torp; Kjell Kristoffersen
Clutter filters adapted to tissue motion in ultrasound color flow imaging.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 2002;49(6):693-704.
2002: Stein Inge Rabben; Steinar Baerum; Vidar Sørhus; Hans Torp
Ultrasound-based vessel wall tracking: an auto-correlation technique with RF center frequency estimation.
Ultrasound in medicine & biology 2002;28(4):507-17.
2002: Bjørn Olav Haugen; Sevald Berg; Kjell Morten Brecke; Hans Torp; Stig A Slørdahl; Terje Skaerpe; Stein O Samstad
Blood flow velocity profiles in the aortic annulus: a 3-dimensional freehand color flow Doppler imaging study.
Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography 2002;15(4):328-33.
2002: Steinar Bjaerum; Hans Torp; Kjell Kristoffersen
Clutter filter design for ultrasound color flow imaging.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 2002;49(2):204-16.
2001: Stig A Slørdahl; Steinar Bjaerum; Brage H Amundsen; Asbjørn Støylen; A Heimdal; Stein Inge Rabben; Hans Torp
High frame rate strain rate imaging of the interventricular septum in healthy subjects.
European journal of ultrasound : official journal of the European Federation of Societies for Ultrasound in Medicine and Biology 2001;14(2-3):149-55.
2001: J Kirkhorn; Peter Frinking; nicolaas deJong; Hans Torp
Three-stage approach to ultrasound contrast detection.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 2001;48(4):1013-22.
2001: Peter Frinking; E I Céspedes; J Kirkhorn; Hans Torp; nicolaas deJong
A new ultrasound contrast imaging approach based on the combination of multiple imaging pulses and a separate release burst.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control 2001;48(3):643-51.
2001: Bjørn Olav Haugen; Steinar Bjaerum; Stein O Samstad; Terje Skjaerpe; Hans Torp
A new method describing cross-sectional blood flow velocity profiles in the left ventricular outflow tract of patients with atrial fibrillation with the use of high-frame rate 2-dimensional color flow imaging.
Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography 2001;14(1):50-6.
2000: Bjørn Olav Haugen; Sevald Berg; Kjell Morten Brecke; Stein O Samstad; Stig A Slørdahl; Terje Skjaerpe; Hans Torp
Velocity profiles in mitral blood flow based on three-dimensional freehand colour flow imaging acquired at high frame rate.
European journal of echocardiography : the journal of the Working Group on Echocardiography of the European Society of Cardiology 2000;1(4):252-6.
2000: Asbjørn Støylen; A Heimdal; Knut Bjørnstad; Rune Wiseth; Harald Vik-Mo; Hans Torp; Bjørn Angelsen; Terje Skjaerpe
Strain rate imaging by ultrasonography in the diagnosis of coronary artery disease.
Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography 2000;13(12):1053-64.
2000: Stig Urheim; Thor Edvardsen; Hans Torp; Bjørn Angelsen; Otto A Smiseth
Myocardial strain by Doppler echocardiography. Validation of a new method to quantify regional myocardial function.
Circulation 2000;102(10):1158-64.
2000: Bjørn Olav Haugen; Sevald Berg; Kjell Morten Brecke; Stein O Samstad; Terje Skjaerpe; Stig A Slørdahl; Hans Torp
Measurement of volumetric mitral and aortic blood flow based on a new freehand three-dimensional colour flow imaging method. An in vivo validation.
European journal of echocardiography : the journal of the Working Group on Echocardiography of the European Society of Cardiology 2000;1(3):204-12.
2000: Sevald Berg; Hans Torp; Bjørn Olav Haugen; Stein O Samstad
Volumetric blood flow measurement with the use of dynamic 3-dimensional ultrasound color flow imaging.
Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography 2000;13(5):393-402.
2000: Steinar Bjaerum; Hans Torp
Statistical evaluation of clutter filters in color flow imaging.
Ultrasonics 2000;38(1-8):376-80.
2000: Sevald Berg; Hans Torp; H-G K Blaas
Accuracy of in-vitro volume estimation of small structures using three-dimensional ultrasound.
Ultrasound in medicine & biology 2000;26(3):425-32.
1999: Sevald Berg; Hans Torp; D Martens; E Steen; Stein O Samstad; I Høivik; B Olstad
Dynamic three-dimensional freehand echocardiography using raw digital ultrasound data.
Ultrasound in medicine & biology 1999;25(5):745-53.
1998: A Heimdal; Asbjørn Støylen; Hans Torp; Terje Skjaerpe
Real-time strain rate imaging of the left ventricle by ultrasound.
Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography 1998;11(11):1013-9.
1998: H-G K Blaas; Sturla H Eik-Nes; S Berg; Hans Torp
In-vivo three-dimensional ultrasound reconstructions of embryos and early fetuses.
Lancet 1998;352(9135):1182-6.
1997: K Bjørnstad; svend aakhus; Hans Torp
How does computer-assisted digital wall motion analysis influence observer agreement and diagnostic accuracy during stress echocardiography?
International journal of cardiac imaging 1997;13(2):105-14.
1996: K Bjørnstad; J Maehle; svend aakhus; Hans Torp; L Hatle; B A Angelsen
Evaluation of reference systems for quantitative wall motion analysis from three-dimensional endocardial surface reconstruction: an echocardiographic study in subjects with and without myocardial infarction.
American journal of cardiac imaging 1996;10(4):244-53.
1995: Hans Torp; K Kristoffersen
Velocity matched spectrum analysis: a new method for suppressing velocity ambiguity in pulsed-wave Doppler.
Ultrasound in medicine & biology 1995;21(7):937-44.
1994: B A Angelsen; svend aakhus; S I Rabben; Hans Torp
Model-based estimation of vascular parameters: evaluation of robustness and suitability of models.
Echocardiography (Mount Kisco, N.Y.) 1994;11(4):409-23.
1994: J Maehle; K Bjoernstad; svend aakhus; Hans Torp; B A Angelsen
Three-dimensional echocardiography for quantitative left ventricular wall motion analysis: a method for reconstruction of endocardial surface and evaluation of regional dysfunction.
Echocardiography (Mount Kisco, N.Y.) 1994;11(4):397-408.
1993: svend aakhus; Hans Torp; T Haugland; L Hatle
Non-invasive estimates of aortic root pressures: external subclavian arterial pulse tracing calibrated by oscillometrically determined brachial arterial pressures.
Clinical physiology (Oxford, England) 1993;13(6):573-86.
1993: R Wiseth; S Samstad; O Rossvoll; Hans Torp; T Skjaerpe; L Hatle
Cross-sectional left ventricular outflow tract velocities before and after aortic valve replacement: a comparative study with two-dimensional Doppler ultrasound.
Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography 1993;6(3 Pt 1):279-85.
1992: S O Samstad; O Rossvoll; Hans Torp; T Skjaerpe; L Hatle
Cross-sectional early mitral flow-velocity profiles from color Doppler in patients with mitral valve disease.
Circulation 1992;86(3):748-55.
1992: S O Samstad; J Bathen; O Rossvoll; Hans Torp; T Skjaerpe; L Hatle
Impact of changes in heart rate and stroke volume on the cross sectional flow velocity distribution of diastolic mitral blood flow. A study on 6 patients with pacemakers programmed at different heart rates.
International journal of cardiac imaging 1992;8(2):75-83.
1991: Roar Juul; SA Slørdahl; Hans Torp; B A Angelsen; Alf O Brubakk
Flow estimation using ultrasound imaging (color M-mode) and computer postprocessing.
Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism 1991;11(5):879-82.
1991: O Rossvoll; S Samstad; Hans Torp; D T Linker; T Skjaerpe; B A Angelsen; L Hatle
The velocity distribution in the aortic anulus in normal subjects: a quantitative analysis of two-dimensional Doppler flow maps.
Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography 1991;4(4):367-78.
1991: Alf O Brubakk; Hans Torp; B A Angelsen
Noninvasive evaluation of flow changes and gas bubbles in the circulation by combined use of color-flow-imaging and computer postprocessing.
Acta astronautica 1991;23():311-9.
1990: S O Samstad; Hans Torp; Knut Matre; O Rossvoll; Leidulf Segadal; H Piene
Instantaneous cross-sectional flow velocity profiles: a comparative study of two ultrasound Doppler methods applied to an in vitro pulsatile flow model.
Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography 1990;3(6):451-64.
1990: B A Angelsen; SA Slørdahl; J E Solbakken; S O Samstad; D T Linker; Hans Torp; H Piene
Estimation of regurgitant volume and orifice in aortic regurgitation combining CW Doppler and parameter estimation in a Windkessel-like model.
IEEE transactions on bio-medical engineering 1990;37(10):930-6.
1989: S O Samstad; Hans Torp; D T Linker; O Rossvoll; T Skjaerpe; E Johansen; K Kristoffersen; B A Angelsen; L Hatle
Cross sectional early mitral flow velocity profiles from colour Doppler.
British heart journal 1989;62(3):177-84.
1983: B Backe; C J Brodtkorb; J Giltvedt; S Kvernes; A O Brubakk; Hans Torp; B A Angelsen
Fetal and maternal aortic flow in two different maternal positions. An investigation with combined Doppler-velocimetry and ultrasonic multiple array.
Ultrasound in medicine & biology 1983;9(6):587-93.