Medical ultrasound

Cardiac mechanics

Acoustic phantoms

Teaching ultrasound methods and applications for students in:

Medicine

Physics

Postgraduate courses

Academic book chapter

• Odd Helge Gilja; N. Thune; Knut Matre et al. (1995). In vitro evaluation of three dimensional ultrasonography in volume estimation of organs. (external link)
• Ola Kristoffer Øye; Wolfgang Wein; Dag Magne Ulvang et al. (2012). Real Time Image-Based Tracking of 4D Ultrasound Data. (external link)
• Hans Gregersen; Knut Matre (2005). The Use of Ultrasound in Biomechanics. (external link)
• Knut Matre; Peter Hans Dahl (2005). Basic Technologies in Ultrasound. (external link)
• Knut Matre; Odd Helge Gilja (2011). Medical imaging. (external link)

Conference lecture

• Kim Nylund; Sabine Leh; Heike Immervoll et al. (2005). Muscularis mucosae, fibrosis and nodular lymphocyte aggregates in Crohn's disease - novel ultrasonographic findings in vitro. (external link)
• Odd Helge Gilja; A Heimdal; Trygve Hausken et al. (2000). A novel method using color Doppler ultrasonography to study relative strain of the muscle layers during antral contractions. (external link)
• Odd Helge Gilja; A Heimdal; Trygve Hausken et al. (2000). A novel method using color Doppler ultrasonography to study relative strain of the muscle layers during antral contractions. (external link)
• Knut Matre (2012). Experimental and clinical measurements of multilayer strain using TDI. (external link)
• Christian Arvei Moen; Pirjo-Riitta Salminen; Ketil Grong et al. (2010). Multilayer radial strain measurements detect reduction in myocardial perfusion before longitudinal, circumferential, radial strain and rotation. An experimental porcine study. (external link)
• Christian Arvei Moen; Pirjo-Riitta Salminen; Ketil Grong et al. (2010). Low-grade coronary stenosis is first detected by multilayer strain measurements. An experimental porcine study. (external link)
• Martin Mezl; Radovan Jirík; Knut Matre et al. (2013). Quantitative myocardial perfusion analysis with contrast-enhanced ultrasound bolus tracking - preliminary animal results. (external link)
• OH Gilja; Trygve Hausken; S Olafsson et al. (1995). In vitro evaluation of three-dimensional ultrasonography based on magnetic scanhead tracking. Oral presentation. (external link)
• Johannes Just Hjertaas; Tord Olav Fanneløp; Ketil Grong et al. (2011). Tissue doppler imaging in open-chest pigs before and after pericardiotomy. (external link)
• Geir Olav Dahle; Pirjo-Riitta Salminen; Christian Arvei Moen et al. (2011). Esmolol added to cold repeated oxygenated blood cardioplegia may increase cardiac function the first hours after declamping in a swine model. (external link)
• Odd Helge Gilja; Alf-Inge Smievoll; Nils Thune et al. (1994). In Vivo Comparison of 3D Ultrasonography and Magnetic Resonance Imaging in Volume Estimation of Abdominal Organs. (external link)
• Pirjo-Riitta Salminen; Anne K. Jonassen; Eva-Katrine Aarnes et al. (2009). Insulinlignende vekstfaktor-II i blodkardioplegi øker kontraktilitet av myokard og stimulerer anti-apoptotiske mekanismer etter reperfusjon. (external link)
• Christian Arvei Moen; Pirjo-Riitta Salminen; Ketil Grong et al. (2011). Left ventricular strain and rotation as markers of acute myocardial ischemia. (external link)
• S-O Molin; A. Falk; R. Siwertsson et al. (1996). Anpassning av TEE proben for stadieindelning av tumører i øvre gastrointestinalkanalen och preliminære resultat av 3D visualisering med multiplanprob. (external link)
• Torbjørn Hergum; Thomas Renhult Skaug; Knut Matre et al. (2008). Quantification of Valvular Regurgitation Area and Geometry using HPRF 3D Doppler. (external link)
• Kjell Vikenes; Jørgen Westby; Knut Matre et al. (2001). Percutaneous assessment of coronary blood flow and cardiac markers. (external link)
• Terje Aass; Lodve Stangeland; Christian Arvei Moen et al. (2014). Polariserende versus depolariserende kardioplegi med repetert, kaldt oksygenert blod i en eksperimentell dyremodell. (external link)
• Christian Arvei Moen; Pirjo-Riitta Salminen; Geir Olav Dahle et al. (2011). Multilayer strain can identify reperfusion from coronary stenosis. (external link)
• Odd Helge Gilja; Alf-Inge Smievoll; Nils Thune et al. (1994). 3D ultrasonography compared with magnetic resonance imaging in volume estimation of human kidneys in vivo. (external link)
• Odd H. Gilja; Nils Thune; Knut Matre et al. (1994). Evaluering av 3D ultrasonografi in vitro. (Tilknyttet prosjektet: Pasienter med funksjonell dyspepsi studert v.h.a. 3-dimensjonal ultralyd.). (external link)
• Pirjo-Riitta Salminen; Anne K. Jonassen; Eva-Katrine Aarnes et al. (2010). Insulin-like growth factor-II in blood cardioplegia enhances myocardial contractility and stimulates anti-apoptotic mechanisms after reperfusion. (external link)
• Terje Aass; Lodve Stangeland; David J. Chambers et al. (2016). Myocardial energy status and ultrastructure with polarizing and depolarizing cardioplegic arrest in a porcine model. (external link)
• Christian Arvei Moen; Pirjo-Riitta Salminen; Geir Olav Dahle et al. (2012). Multilayer radial strain analysis can detect successful reperfusion from a significant non-occlusive coronary stenosis. An experimental porcine study. (external link)

Academic article

• Kenneth Strømmen; Tor A. Stormark; Bjarne Magnus Iversen et al. (2004). Volume estimation of small phantoms and rat kidneys using three-dimensional ultrasonography and a position sensor. (external link)
• Dana Cramariuc; Eva Gerdts; Johannes Just Hjertaas et al. (2015). Myocardial function in aortic stenosis - insights from radial multilayer Doppler strain. (external link)
• Knut Matre; Erik Hexeberg; Ketil Grong et al. (1987). Local myocardial function following coronary occlusion in cats. Effect on non-ischaemic regions. (external link)
• Terje Aass; Lodve Stangeland; Christian Arvei Moen et al. (2019). Left ventricular dysfunction after two hours of polarizing or depolarizing cardioplegic arrest in a porcine model. (external link)
• Ragnar Sande; Knut Matre; Geir Egil Eide et al. (2012). Ultrasound safety in early pregnancy: reduced energy setting does not compromise obstetric Doppler measurements. (external link)
• Knut Matre; Christian Arvei Moen; Tord Olav Fanneløp et al. (2007). Multilayer radial systolic strain can identify subendocardial ischemia: An experimental tissue Doppler imaging study of the porcine left ventricular wall. (external link)
• Odd Helge Gilja; Andreas Heimdal; Trygve Hausken et al. (2002). Strain during gastric contractions can be measured using Doppler ultrasonography. (external link)
• Aymen B Ahmed; Odd Helge Gilja; Trygve Hausken et al. (2009). Strain measurement during antral contractions by ultrasound strain rate imaging: influence of erythromycin. (external link)
• Johannes Just Hjertaas; Knut Matre (2019). A left ventricular phantom for 3D echocardiographic twist measurements. (external link)
• Christian Arvei Moen; Pirjo-Riitta Salminen; Geir Olav Dahle et al. (2013). Multi-layer radial systolic strain vs. one-layer strain for confirming reperfusion from a significant non-occlusive coronary stenosis. (external link)
• Erik Hexeberg; Sigurd Birkeland; Ketil Grong et al. (1992). Coronary artery stenosis provokes non-uniformity of two-dimensional deformation in the anterior wall of the feline left ventricle. (external link)
• Peder M Kvitting; Idar Hessevik; Knut Matre et al. (1996). Three-dimensional cross-sectional velocity distribution in the ascending aorta in cardiac patients. (external link)
• Tord Olav Fanneløp; Geir Olav Dahle; Knut Matre et al. (2008). Esmolol before 80 min of cardiac arrest with oxygenated cold blood cardioplegia alleviates systolic dysfunction. An experimental study in pigs. (external link)
• LB Nesje; Arne Skarstein; Knut Matre et al. (1998). Dieulafoy's vascular malformation: Role of endoscopic ultrasonography in therapeutic decision-making. (external link)
• Arnold Berstad; Trygve Hausken; OH Gilja et al. (1995). Volume measurements of the antrum by 3D-ultrasonography and flow measurements through the pylorus by duplex technique. (external link)
• Y. Q. Zhou; S. Faerestrand; S. Birkeland et al. (1997). Effects of velocity distribution, diameter measurement and velocity tracing on the accuracy of cardiac output measurement by pulsed Doppler echocardiography in the aortic annulus. (external link)
• Aymen B Ahmed; Odd Helge Gilja; Hans Gregersen et al. (2006). In vitro strain measurement in the porcine antrum using Doppler strain rate imaging. (external link)
• Muhammad Umael Khan; Tom Roar Omdal; Gottfried Greve et al. (2021). Effect of temporal and spatial smoothing on speckle–tracking-derived strain in neonates. (external link)
• Yu-Qing Zhou; Svein Færestrand; Knut Matre (1996). Velocity distribution in the aortic annulus in patients with primary dilated and ischemic cardiomyopathy measured using Doppler ultrasound. (external link)
• Johannes Just Hjertaas; Eigir Einarsen; Eva Gerdts et al. (2023). Impact of aortic valve stenosis on myocardial deformation in different left ventricular levels: A three-dimensional speckle tracking echocardiography study. (external link)
• Trygve Hausken; N. Thune; Knut Matre et al. (1994). Volume estimation of the gastric antrum and the gallbladder in patients with non-ulcer dyspepsia and erosive prepyloric changes, using three-dimensional ultrasonography. (external link)
• Muhammad Umael Khan; Johannes Just Hjertaas; Gottfried Greve et al. (2016). Optimal acquisition settings for speckle tracking echocardiography-derived strains in infants: An in vitro study. (external link)
• Roald Flesland Havre; Erlend Elde; Odd Helge Gilja et al. (2008). Freehand real-time elastography: Impact of scanning parameters on image quality and In Vitro intra- and interobserver validations. (external link)
• Knut Matre; Elisabeth M Stokke; Ditlef Martens et al. (1999). In vitro volume estimation of kidneys using three-dimensional ultrrasonography and a position sensor. (external link)
• Lisa Marie Dale Grymyr; Saied Nadirpour; Eva Gerdts et al. (2020). Left ventricular myocardial oxygen demand and subclinical dysfunction in patients with severe obesity referred for bariatric surgery. (external link)
• Ragnar Sande; Knut Matre; Geir Egil Eide et al. (2013). The effects of reducing the thermal index for bone from 1.0 to 0.5 and 0.1 on common obstetric pulsed wave Doppler measurements in the second half of pregnancy. (external link)
• Helga Bergljot Midtbø; Anne Grete Semb; Knut Matre et al. (2018). Left Ventricular Systolic Myocardial Function in Ankylosing Spondylitis. (external link)
• Pirjo-Riitta Salminen; Geir Olav Dahle; Christian Arvei Moen et al. (2014). Reperfusion therapy with low-dose insulin or insulin-like growth factor 2; myocardial function and infarct size in a porcine model of ischaemia and reperfusion. (external link)
• Knut Matre; Aymen B Ahmed; Hans Gregersen et al. (2003). In vitro evaluation of ultrasound Doppler strain rate imaging: modification for measurement in a slowly moving tissue phantom. (external link)
• Aymen B Ahmed; Odd Helge Gilja; Hans Gregersen et al. (2006). In vitro strain measurement in the porcine antrum using ultrasound Doppler strain rate imaging. (external link)
• Erik Hexeberg; Sigurd Birkeland; Ketil Grong et al. (1992). Coronary artery stenosis provokes nonuniformity of twodimensional deformation in the anterior wall of the feline left ventricle. (external link)
• Bjarne Magnus Iversen; Fred Ivan Kvam; Knut Matre et al. (1992). Effect of mesangiolysis on autoregulation of renal blood flow and glomerular filtration in rats. (external link)
• Trygve Hausken; N. Thune; Knut Matre et al. (1993). New device shows enlarged antrum in dyspeptic patients. (external link)
• Dag Arne Lihaug Hoff; Hans Gregersen; Svein Ødegaard et al. (2006). A multimodal laser Doppler and endosonographic distension device for studying mechanosensation and mucosal blood flow in the oesophagus. (external link)
• Torbjørn Hergum; Thomas Renhult Skaug; Knut Matre et al. (2009). Quantification of Valvular Regurgitation Area and Geometry Using HPRF 3-D Doppler. (external link)
• Sahrai Saeed; Eva Gerdts; Ulrike Waje-Andreassen et al. (2019). Left ventricular myocardial dysfunction in young and middle-aged ischemic stroke patients: the Norwegian stroke in the young study. (external link)
• Svein Ødegaard; Lars B Nesje; M.B. Kimmey et al. (1992). Trabsendoskopische Ultraschalldiagnostik bei Läsionen im Oberen Verdauungstrakt im Rahmen der Routineendoskopi. (external link)
• Tord Olav Fanneløp; Geir Olav Dahle; Knut Matre et al. (2004). An anaesthetic protocol in the young domestic pig allowing neuromuscular blockade for studies of cardiac function following cardioplegic arrest and cardiopulmonary bypass. (external link)
• Peter Moritz Schuster; Knut Matre; Svein Færestrand (2005). Assessment of regional timing of left ventricular sytolic longitudinal movement by Doppler tissue synchronization imaging in structurally normal hearts. (external link)
• Peder M Kvitting; Idar Hessevik; Knut Matre et al. (1996). Three-dimensional cross-sectional velocity distribution in the ascending aorta in cardiac patients. (external link)
• Tom Roar Omdal; Muhammad Umael Khan; Cathrine Ebbing et al. (2021). The influence of region of interest width in fetal 2D-speckle tracking echocardiography late in pregnancy. (external link)
• Yuqing Zhou; Svein Færestrand; Knut Matre et al. (1993). Velocity distribution in the left ventricular outflow tract and the aortic anulus measured with Doppler colour flow mapping in normal subjects. (external link)
• Knut Matre; Lars Ersland; Terje H Larsen et al. (2002). In vitro agreement between magnetic resonance imaging and intraluminal Doppler ultrasound for high flow velocity measurements. (external link)
• Hans Gregersen; Odd Helge Gilja; Trygve Hausken et al. (2002). Mechanical properties in the human gastric antrum using B-mode ultrasonography and antral distension. (external link)
• Jon-Kenneth Heltne; Marit Farstad; Tjøstolv Lund et al. (2002). Determination of plasma volume in anaesthetized piglets using the carbon monoxide (CO) method. (external link)
• Lisa Marie Dale Grymyr; Saied Nadirpour; Eva Gerdts et al. (2021). One-year impact of bariatric surgery on left ventricular mechanics: results from the prospective FatWest study. (external link)
• Nadia Pristaj; Sahrai Saeed; Helga Bergljot Midtbø et al. (2020). Covariables of myocardial function in women and men with increased body mass index. (external link)
• YQ Zhou; S Birkeland; Knut Matre et al. (1997). Effects of velocity distribution. Diameter measurement and velocity tracing on the accuracy of cardiac output measurement by pulsed Doppler echocardiography in the aortic annulus. (external link)
• Bjarne Magnus Iversen; Fred I. Kvam; Knut Matre et al. (1998). Resetting of RBF autoregulation during acute pressure reduction in hypertensive rats. (external link)
• Geir Olav Dahle; Pirjo-Riitta Salminen; Christian Arvei Moen et al. (2016). Carvedilol-enriched cold oxygenated blood cardioplegia improves left ventricular diastolic function after weaning from cardiopulmonary bypass. (external link)
• Nina Kovac; Lisa Marie Dale Grymyr; Eva Gerdts et al. (2022). Markers of Subclinical Atherosclerosis in Severe Obesity and One Year after Bariatric Surgery. (external link)
• Sigurd Birkeland; Jørgen Westby; Knut Matre et al. (1994). Myocardial contraction patterns in non-ischaemic and ischaemic regions during acute coronary insufficiency. (external link)
• Johannes Just Hjertaas; Henrik Fosså; Grete Lunestad Dybdahl et al. (2013). Accuracy of real-time single- and multi-beat 3-D speckle tracking echocardiography in vitro. (external link)
• OH Gilja; AI Smievoll; N Thune et al. (1995). In vivo comparison of 3D ultrasonography and Magnetic Response Imaging in volume estimation of human kidneys. (external link)
• Trygve Hausken; Arnold Berstad; Knut Matre et al. (1992). Antroduodenal motility and movements of luminal contents studied by Duplex-sonography. (external link)
• Eigir Einarsen; Johannes Just Hjertaas; Haotian Gu et al. (2021). Impact of arterio-ventricular interaction on first-phase ejection fraction in aortic stenosis. (external link)
• Knut Matre; Tord Olav Fanneløp; Geir Olav Dahle et al. (2005). Radial strain gradient across the normal myocardial wall in open-chest pigs measured with Doppler strain rate imaging. (external link)
• Helga Bergljot Midtbø; Anne Grete Semb; Knut Matre et al. (2016). Disease activity is associated with reduced left ventricular systolic myocardial function in patients with rheumatoid arthritis. (external link)
• Pirjo-Riitta Salminen; Geir Olav Dahle; Christian Arvei Moen et al. (2015). Intracoronary insulin administered at reperfusion in a porcine model of acute coronary syndrome. (external link)
• Sigurd Birkeland; Erik Hexeberg; Knut Matre et al. (1990). Gradual reduction of coronary perfusion pressure in cats: changes in transmural distribution of blood flow. (external link)
• Kjell Vikenes; Jørgen Westby; Knut Matre et al. (2002). Percutaneous assessment of coronary blood flow and cardiac biomarkers. (external link)
• Kim Nylund; Sabine Leh; Heike Immervoll et al. (2008). Crohn's disease: Comparison of in vitro ultrasonographic images and histology. (external link)
• Arnold Berstad; Trygve Hausken; Odd Helge Gilja et al. (1994). Volume measurement of gastric antrum by 3-D ultrasonography and flow measurements through the pylorus by duplex technique. (external link)
• Ragnar Sande; Knut Matre; Geir Egil Eide et al. (2013). The effect of ultrasound output level on obstetric biometric measurements. (external link)
• Knut Matre; S. Birkeland; Idar Hessevik et al. (1994). Comparison of transit-time and Doppler ultrasound methods for measurement of flow in aortocoronary bypass grafts during cardiac surgery. (external link)
• Tor Andre Stormark; Kenneth Strømmen; Bjarne Magnus Iversen et al. (2007). Three-dimensional ultrasonography can detect the modulation of kidney volume in two-kidney, one-clip hypertensive rats. (external link)
• Kjell Vikenes; Jørgen Westby; Knut Matre et al. (2002). Release of cardiac troponin I after temporally graded acute coronary ischaemia with electrocardiographic ST depression. (external link)
• Yuqing Zhou; Svein Færestrand; Knut Matre (1995). Velocity distribution in the left ventricular outflow tract in patients with aortic stenosis: effect on the measurement of aortic valve area by using continuity equation. (external link)
• Idar Hessevik; Knut Matre; Peder M. Kvitting et al. (1994). Intraluminal recording of cross-sectional blood velocity distribution of human ascending aorta by ultrasound doppler technique. (external link)
• Christian Arvei Moen; Pirjo-Riitta Salminen; Ketil Grong et al. (2011). Left ventricular strain, rotation, and torsion as markers of acute myocardial ischemia. (external link)
• Yuqing Zhou; Svein Færestrand; Sigurd Birkeland et al. (1995). The velocity distribution in the aortic anulus at different times during systole is mainly determined by the pattern of flow convergence in the left ventricular outflow tract: an experimental study using Doppler colour flow mapping. (external link)
• Hilde Halland; Knut Matre; Eigir Einarsen et al. (2019). Effect of fitness on cardiac structure and function in overweight and obesity (the FATCOR study). (external link)
• Muhammad Umael Khan; Tom R. Omdal; Knut Matre et al. (2021). Speckle tracking derived strain in neonates: planes, layers and drift. (external link)
• Nils Thune; Odd Helge Gilja; Trygve Hausken et al. (1996). A practical method for estimating enclosed volumes using 3D ultrasound. (external link)
• Tord Olav Fanneløp; Geir Olav Dahle; Pirjo-Riitta Salminen et al. (2009). Multidose cold oxygenated blood is superior to a single dose of bretschneider HTK-cardioplegia in the pig. (external link)
• Lars B Nesje; Arne Skarstein; Knut Matre et al. (1998). Dieulafoy's vascular malformation: role of endoscopic ultrasonography in therapeutic decision-making. (external link)
• Terje Aass; Lodve Stangeland; Christian Arvei Moen et al. (2016). Myocardial function after polarizing versus depolarizing cardiac arrest with blood cardioplegia in a porcine model of cardiopulmonary bypass. (external link)
• Knut Matre; Peder Kvitting; Y.Q. Zhou et al. (2003). The effect of body weight on the degree of blood velocity profile skewness in the aortic annulus in domestic pigs. (external link)
• LB Nesje; Arne Skarstein; Knut Matre et al. (1998). Dieulafoy's vascular malformation: Role of endoscopic ultrasonography in therapeutic decision-making. (external link)
• Tom Roar Omdal; Muhammad Umael Khan; Britt Engan et al. (2025). Left ventricular myocardial strain in neonates is influenced by the definition of the basal region of interest. (external link)
• Bjarne Magnus Iversen; Fred-Ivan Kvam; Knut Matre et al. (1998). Resetting of renal blood flow autoregulation during acute blood pressure reduction in hypertensive rats.. (external link)
• Nicola Logallo; Annette Fromm; Ulrike Waje-Andreassen et al. (2014). Effect of microbubble contrast on intracranial blood flow velocity assessed by transcranial Doppler. (external link)
• Asta Kathinka H Retz; Spiros Kotopoulis; Torvid Kiserud et al. (2016). Measured acoustic intensities for clinical diagnostic ultrasound transducers and correlation with thermal index. (external link)
• Odd Helge Gilja; Trygve Hausken; Snorri Olafsson et al. (1998). In vitro evaluation of three-dimensional ultrasonography based on magnetic scanhead tracking. (external link)
• Terje Aass; Lodve Stangeland; David J. Chambers et al. (2017). Myocardial energy metabolism and ultrastructure with polarizing and depolarizing cardioplegia in a porcine model. (external link)
• Dana Cramariuc; Eva Gerdts; Einar Skulstad Davidsen et al. (2010). Myocardial deformation in aortic valve stenosis – relation to left ventricular geometry. (external link)
• Knut Matre; S. Birkeland; Idar Hessevik et al. (1994). Comparison of transit-time and Doppler ultrasound methods for measurement of flow in aortocoronary bypass grafts during cardiac surgery. (external link)
• Geir Olav Dahle; Lodve Stangeland; Christian Arvei Moen et al. (2016). The influence of acute unloading on left ventricular strain and strain rate by speckle tracking echocardiography in a porcine model. (external link)
• Einar Skulstad Davidsen; Christian Arvei Moen; Knut Matre (2010). Radial deformation by tissue Doppler imaging in multiple myocardial layers. (external link)
• Yuqing Zhou; Sigurd Birkeland; Knut Matre et al. (1997). Effect of velocity distribution, diameter measurement and velocity tracing on the accuracy of cardiac output measurement by pulsed Doppler echocardiography in the aortic anulus of pigs. (external link)
• Geir Olav Dahle; Pirjo-Riitta Salminen; Christian Arvei Moen et al. (2015). Esmolol added in repeated, cold, oxygenated blood cardioplegia improves myocardial function after cardiopulmonary bypass. (external link)
• Kathinka Retz; Spiros Kotopoulis; Torvid Kiserud et al. (2017). Measured acoustic intensities for clinical diagnostic ultrasound transducers and correlation with thermal index. (external link)
• Odd Helge Gilja; Nils Thune; Knut Matre et al. (1994). In vitro evaluation of three-dimensional ultrasonography in volume estimation of abdominal organs. (Tilknyttet prosjektet: Pasienter med funksjonell dyspepsi studert v.h.a. 3-dimensjonal ultralyd.). (external link)
• Pirjo-Riitta Salminen; Anne K. Jonassen; Eva-Katrine Aarnes et al. (2011). Antiapoptotic Intervention in Repeated Blood Cardioplegia: A Porcine Study of Myocardial Function. (external link)
• Idar Hessevik; Knut Matre; Peder M. Kvitting et al. (1995). Intraluminal recording of cross-sectional blood velocity distribution of human ascending aorta by ultrasound Doppler technique. (external link)
• Aymen B Ahmed; Knut Matre; Trygve Hausken et al. (2012). Rome III subgroups of functional dyspepsia exhibit different characteristics of antral contractions measured by strain rate imaging. (external link)
• Christian Arvei Moen; Pirjo-Riitta Salminen; Geir Olav Dahle et al. (2013). Is strain by Speckle Tracking Echocardiography dependent on user controlled spatial and temporal smoothing? An experimental porcine study. (external link)
• Trygve Hausken; Svein Ødegaard; Knut Matre et al. (1992). Untersuchungen der gastroduodenalen Motilität mit Realtime Ultrasonographie. (external link)
• Peder Kvitting; Knut Matre; Idar Hessevik et al. (1999). Velocity distribution in the ascending aorta in pigs during chronotropic and inotropic stimulation. (external link)
• Lisa Marie Dale Grymyr; Saied Nadirpour; Eva Gerdts et al. (2025). Long-Term Trajectories of Left Heart Geometry, Mechanics, and Oxygen Demand After Bariatric Surgery. (external link)

Conference abstract

• Dana Cramariuc; Johannes Just Hjertaas; Leidulf Segadal et al. (2011). Impact of aortic valve stenosis and hypertension on radial strain in multiple layers. (external link)
• Dana Cramariuc; Eva Gerdts; Einar Skulstad Davidsen et al. (2008). The differential impact of static and pulsatile blood pressure components on regional myocardial deformation in patients with asymptomatic aortic valve stenosis. A SEAS substudy. (external link)
• Johannes Just Hjertaas; Henrik Fosså; Grete Lunestad Dybdahl et al. (2011). Accuracy of real-time single and multi beat 3D speckle tracking echocardiography in vitro. (external link)
• Einar Skulstad Davidsen; Knut Matre (2005). Systolic radial strain in 3 layers across the myocardial wall in normal humans. (external link)
• Einar Skulstad Davidsen; Karel Kier-Jan Kuiper; Knut Matre et al. (2014). Determinants of left ventricular systolic function after transcatheter aortic valve implantation. (external link)
• Einar Skulstad Davidsen; Dana Cramariuc; Øyvind Bleie et al. (2011). Increased systolic strain rate early after transcatheter aortic valve implantation. (external link)
• Umael Khan; Johannes Just Hjertaas; Gottfried Greve et al. (2015). Optimizing speckle tracking echocardiography strain measurements in infants: an in-vitro phantom study. (external link)
• Christian Arvei Moen; Pirjo-Riitta Salminen; Ketil Grong et al. (2010). Multilayer radial strain measurements detect reduction in myocardial perfusion before longitudinal, circumferential, radial strain and rotation. An experimental porcine study. (external link)
• Christian Arvei Moen; Pirjo-Riitta Salminen; Ketil Grong et al. (2011). Multilayer radial strain measurements can detect early reperfusion from ischemia. An experimental porcine study. (external link)
• Erik Hexeberg; Sigurd Birkeland; Ketil Grong et al. (1991). Left coronary artery stenosis provokes nonuniformity of myocardial contraction. (external link)
• Ragnar Sande; Knut Matre; Geir Egil Eide et al. (2012). The effect of ultrasound power level on obstetric biometric measurements. (external link)
• Dag Arne Lihaug Hoff; Hans Gregersen; Svein Ødegaard et al. (2005). Development of a multimodal device incorporating laser Doppler flowmetry to study oesophageal pain mechanisms.. (external link)
• Dana Cramariuc; Eva Gerdts; Einar Skulstad Davidsen et al. (2009). 2D Longitudinal Myocardial Strain: A More Sensitive Parameter of Left Ventricular Dysfunction in Aortic Valve Stenosis?. (external link)
• Johannes Just Hjertaas; Knut Matre (2016). A twisting left ventricular ultrasound phantom for evaluation of 3D speckle tracking twist measurements. (external link)
• Knut Matre; Tord Olav Fanneløp; Christian Arvei Moen et al. (2005). Radial strain in 4 layers across the left ventricular wall. An experimental TVI study in pigs demonstrating the influence of ischaemia. (external link)

Conference poster

• Yuqing Zhou; Svein Færestrand; Sigurd Birkeland et al. (1995). The dynamic change of the systolic velocity distribution in the aortic annulus is closely related to the pattern of flow convergence in the left ventricular outflow tract. (external link)
• Peter Schuster; Svein Færestrand; Knut Matre (2004). Assessment of Regional Timing of Left Ventricular Longitudinal Movement by Tissue Synchronization Imaging. (external link)
• Fred-Ivan Kvam; Jan A Christensen; Bjarne Magnus Iversen et al. (1990). Chronic Ca–blocade increases glomerular capillary pressure and induces glomerular damage in SHR with nephron loss. (external link)
• Jarle Ofstad; Fred-Ivan Kvam; Knut Matre et al. (1990). Mesangiolysis does not influence RBF autoregulation, but attenutes autoregulation of RBF. (external link)
• Johannes Just Hjertaas; Tord Olav Fanneløp; Ketil Grong et al. (2011). Doppler strain rate imaging in open-chest pigs before and after pericardiotomy. (external link)
• Fred-Ivan Kvam; Bjarne Magnus Iversen; Knut Matre et al. (1990). Indometacin abolishes RBF and GFR autoregulation and increases glomerulary capillary pressure in SHR with nephron loss. (external link)
• Yuqing Zhou; Svein Færestrand; Knut Matre (1993). Flow velocity distribution in the aortic annulus in patients with congestive heart failure. (external link)
• Bjarne Magnus Iversen; Fred-Ivan Kvam; Knut Matre et al. (1990). Re–resetting of RBF autoregulation in SHR and non–clipped kidney in 2k–1C is acute, myogenic, and has a barostat function. (external link)
• Odd Helge Gilja; Andreas Heimdal; Trygve Hausken et al. (2002). A Doppler ultrasound method to study strain of antral contractions. (external link)
• Yuqing Zhou; Svein Færestrand; Knut Matre (1993). The velocity distribution in the left ventricular outflow tract: effect on aortic stenosis area measurement. (external link)
• Terje Aass; Lodve Stangeland; Christian Arvei Moen et al. (2015). Polarizing versus depolarizing cardiac arrest with repeated, cold, oxygenated blood cardioplegia in a translational porcine model. (external link)
• Fred-Ivan Kvam; Bjarne Magnus Iversen; Knut Matre et al. (1990). Infusion of nifedipine abolishes RBF autoregulation in SHR with nephron loss. (external link)
• Odd Helge Gilja; Andreas Heimdal; Trygve Hausken et al. (2001). Strain rate imaging- a novel Doppler ultrasound method to study antral contractions. (external link)
• Jon Erik Grønbech; Knut Matre; K. Svanes et al. (1987). The role of gastric mucosal blood flow in mucosal repair after damage by hypertonic saline in cats. (external link)
• Geir Olav Dahle; Christian Arvei Moen; Pirjo-Riitta Salminen et al. (2011). Assessing load independent measures of contractility by pressure-strain loops during acute preload reduction. (external link)

Master’s thesis

• Henrik Fosså; Per Lunde; Knut Matre (2011). Ultrasound phantom for myocardium. (Master thesis). (external link)
• Grete Lunestad Dybdahl; Knut Matre; Renate Grüner (2011). Utvikling av testrigg for ultralyd volum- og strainmålingar i hjarta. (external link)

Letter to the editor

• Helga Bergljot Midtbø; Anne Grete Semb; Knut Matre et al. (2016). Response to: 'Disease activity and left ventricular systolic function in rheumatoid arthritis' by Giollo et al. (external link)
• Geir Olav Dahle; Pirjo-Riitta Salminen; Christian Arvei Moen et al. (2016). Reply: Esmolol Added in Cardioplegia. (external link)

Popular science article

• Odd Mørkve; Alfred Halstensen; Knut Matre (1996). Evaluering av undervisningen i indremedisin ved Universitetet i Bergen. Effekt av økning i studenttall, ny studieplan og innføring i nytt studiested. (external link)
• Odd Mørkve; Alfred Halstensen; Knut Matre (1996). Evaluering av undervisningen i indremedisin ved Universitetet i Bergen. Effekt av økning i studenttall, ny studieplan og innføring i nytt studiested. (external link)

Non-fiction monograph

• Svein Ødegaard; Odd Helge Gilja; Knut Matre (2009). Innføring i abdominal ultrasonografi. (external link)
• Hanne Haslene-Hox; Elisabeth Silden; Maja Mujic et al. (2011). 2011 Joint National Ph.D. Conference in Medical Imaging and MedViz Conference. (external link)

Doctoral thesis (PhD)

• Pirjo-Riitta Salminen; Ketil Grong; Knut Matre et al. (2015). Myocardial protection and anti-apoptotic intervention at reperfusion. Experimental studies in translational porcine models of myocardial ischemia and reperfusion. (external link)
• Terje Aass; Ketil Grong; Knut Matre et al. (2019). Polarizing versus depolarizing blood cardioplegia: An experimental study of myocardial function, metabolism and ultrastructure following cardiopulmonary bypass and cardioplegic arrest. (external link)
• Geir Olav Dahle; Ketil Grong; Knut Matre et al. (2017). Cardiac performance after adrenergic blocker-enriched blood cardioplegia. An evaluation of left ventricular function by pressure volume loops and myocardial deformation. (external link)
• Christian Arvei Moen; Knut Matre; Ketil Grong (2013). Myocardial deformation during ischemia and reperfusion. An experimental study of regional left ventricular function by Tissue Doppler Imaging and Speckle Tracking Echocardiography. (external link)
• Knut Matre (1988). Invasive ultrasound for assessment of cardiac function : application of transit-time ultrasound for evaluation of myocardial contraction, and Doppler ultrasound for measure- ment of cardiac output. (external link)
• Dana Cramariuc; Eva Gerdts; Knut Matre (2009). Left ventricular structure and systolic function in aortic valve stenosis : influence of global left ventricular load, gender and hypertension. (external link)
• Tord Olav Fanneløp; Leidulf Segadal; Ketil Grong et al. (2011). A Porcine Model for Studies of Cardioplegia. Assessment of left ventricular myocardial function after cardioplegic arrest by pressure-volume loops, tissue Doppler imaging and microspheres. (external link)

Lecture

• Terje Aass; Lodve Stangeland; Christian Arvei Moen et al. (2018). Left ventricular dysfunction after two hours of polarizing or depolarizing cardioplegic arrest in a porcine model of cardiopulmonary bypass.. (external link)

Academic literature review

• Knut Matre; Mai Tone Lønnebakken (2013). Doppler av kar. (external link)
• Muhammad Umael Khan; Tom Roar Omdal; Knut Matre et al. (2019). What is left ventricular strain in healthy neonates? A systematic review and meta-analysis. (external link)

Textbook

• Svein Ødegaard; Odd Helge Gilja; Knut Matre (2009). Innføring i abdominal ultrasonografi. (external link)

Editorial/Leader article

• Thomas Kohl; R. Schurg; H. Maxeiner et al. (2013). 22nd World Congress on Ultrasound in Obstetrics and Gynecology, 9-13 September 2012, Copenhagen, Denmark: presentations and awards. (external link)

See a complete overview of publications in Cristin.

1. Effect of left ventricular hypertrophy on myocardial strain and torsion

2. Studies on myocardial dysfunction following ischemia and reperfusion

3. Develoment of acoustic phantoms

4. Accuracy of cardiac 3D deformation methods