Leif Østergaard

  1. 2007
  2. Published

    Automatic Correction For Signal Intensity Drift In Diffusion Weighted Images. / Frandsen, Jesper; Sangill, Ryan; Østergaard, Leif; Zeidler, Dora; Vestergaard-Poulsen, Peter.

    2007. Poster session presented at ISMRM 14th Scientific Meeting & Exhibition, Seattle, Washington, United States.

    Research output: Contribution to conferencePoster

  3. Published

    Bayesian regularization of diffusion tensor images. / Frandsen, Jesper; Hobolth, Asger; Østergaard, Leif; Vestergaard-Poulsen, Peter; Jensen, Eva Bjørn Vedel.

    In: Biostatistics, Vol. 8, No. 4, 2007, p. 784-799.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  4. Published

    Billeddiagnostik af patofysiologien ved akut apopleksi. / Ashkanian, Mahmoud; Hjort, Niels; Sølling, Christine; Gyldensted, Carsten; Østergaard, Leif.

    In: Ugeskrift for Laeger, Vol. 169, No. 40, 2007, p. 3369-72.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  5. Published

    Dynamic changes in corticospinal tracts after stroke detected by fibretracking. / Møller, Mette; Frandsen, Jesper; Andersen, Grethe; Gjedde, Albert; Vestergaard-Poulsen, Peter; Østergaard, Leif.

    In: Journal of Neurology, Neurosurgery and Psychiatry, Vol. 78, No. 6, 2007, p. 587-92.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  6. Published

    Host tissue dependence on the tracer relaxation effect in Spin Echo. / Kjølby, Birgitte Fuglsang; Morell, Arvid; Saeboe, Karen; Kiselev, Valerij G; Haldorsen, Anita G.; Østergaard, Leif; Bjørnerud, Atle.

    Joint Annual Meeting ISMRM-ESMRMB 2007. International Society of Magnetic Resonance in Medicine, 2007.

    Research output: Contribution to book/anthology/report/proceedingArticle in proceedings

  7. Published

    Infarct prediction and treatment assessment with MRI-based algorithms in experimental stroke models. / Wu, Ona; Sumii, T; Asahi, M; Sasamata, M; Østergaard, Leif; Rosen, BR; Lo, EH; Dijkhuizen, RM.

    In: Journal of Cerebral Blood Flow and Metabolism, Vol. 27, No. 1, 2007, p. 196-204.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  8. Published

    Micro structural changes in ischemic cortical gray matter predicted by a model of diffusion weighted MRI. / Vestergaard-Poulsen, Peter; Hansen, Brian; Østergaard, Leif; Jakobsen, Rikke.

    26. ed. J. Magnetic Resonance Imaging, 2007. p. 529-40.

    Research output: Working paper

  9. Published

    Microstructural changes in ischemic cortical gray matter predicted by a model of diffusion-weighted MRI. / Vestergaard-Poulsen, Peter; Hansen, Brian; Østergaard, Leif; Jakobsen, Rikke.

    In: Journal of Magnetic Resonance Imaging, Vol. 26, No. 3, 2007, p. 529-40.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  10. Published

    Modeling dendrite density from magnetic resonance diffusion measurements. / Jespersen, Sune Nørhøj; Kroenke, CD; Østergaard, Leif; Ackerman, JJ; Yablonskiy, DA.

    In: NeuroImage, Vol. 34, No. 4, 2007, p. 1473-1486.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  11. Published

    Modeling the regulation of cerebral oxygenextraction by flow heterogeneity. / Jespersen, Sune Nørhøj; Ashkanian, Mahmoud; Mouridsen, Kim; Østergaard, Leif.

    2007. Abstract from Workshop on cerebral perfusion and brain function 2007, Salvador da Bahia, Brazil.

    Research output: Contribution to conferenceConference abstract for conference

  12. Published

    Optimizing DSC perfusion-imaging by minimizing susceptibility artefacts at 3 Tesla parallel imaging and SE versus GRE : 3rd place research focus poster award. / Blankholm, Anne Dorte; Mouridsen, Kim; Ashkanian, Mahmoud; Gyldensted, Carsten; Østergaard, Leif.

    Optimizing DSC perfusion-imaging by minimizing susceptibility artefacts at 3 Tesla parallel imaging and SE versus GRE. 2007. p. 1.

    Research output: Contribution to book/anthology/report/proceedingArticle in proceedings

  13. Published

    Predictive Models in Multimodal Imaging. / Mouridsen, Kim; Østergaard, Leif.

    Neurodegenereration in Multiple Sclerosis. ed. / Massimo Filippi; Marco Rovaris; Giancarlo Comi. Italy : Springer, 2007. p. 127-149.

    Research output: Contribution to book/anthology/report/proceedingBook chapter

  14. Published

    Realistic model of partial volume effect on the AIF in dynamic susceptibility contrast perfusion MRI. / Kjølby, Birgitte Fuglsang; Østergaard, Leif; Kiselev, Valerij G.

    Joint Annual Meeting ISMRM-ESMRMB 2007. International Society of Magnetic Resonance Imaging, 2007.

    Research output: Contribution to book/anthology/report/proceedingArticle in proceedings

  15. Published

    Relaxivity of blood pool contrast agent depends on the host tissue as suggested by semianalytical simulations. / Kjølby, Birgitte Fuglsang; Østergaard, Leif; Kiselev, Valerij.

    2007. Poster session presented at SVF PhD Day 2007, Aarhus, Denmark.

    Research output: Contribution to conferencePoster

  16. Published

    Statistical mapping of effects of middle cerebral artery occlusion (MCAO) on blood flow and oxygen concymption in porcine brain. / Watanabe, H.; Sakoh, M.; Andersen, F.; Rodell, A.; Sørensen, Jens Christian H.; Østergaard, Leif; Mouridsen, Kim; Cumming, P.

    In: J. Neurosci. Methods, 2007.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  17. Published

    Theoretical Analysis of Perfusion Measurement using GE at 1.5 T and 3T. / Kjølby, Birgitte Fuglsang; Østergaard, Leif; Kiselev, Valerij G.

    ESMRMB. ESMRMB, 2007.

    Research output: Contribution to book/anthology/report/proceedingArticle in proceedings

  18. 2006
  19. Published

    Polyrhythmic communicational devices appear as languagein the brains of musicians. / Vuust, Peter; Østergaard, Leif; Roepstorff, Andreas.

    ICMPC9 - International Conference on Music Perception and Cognition. ESCOM, 2006.

    Research output: Contribution to book/anthology/report/proceedingArticle in proceedings

  20. Published

    Are MRI-Based Predictive Models Comparable Among Stroke Centers? / Hjort, Niels; Wu, Ona; Ashkanian, Mahmoud; Sølling, Christine; Mouridsen, Kim; Christensen, Søren; Fiehler, Jens; Thomalla, Götz; Kucinski, Thomas; Röther, Joachim; Andersen, Grethe; Østergaard, Leif.

    2006. Poster session presented at International Stroke Conference, Orlando, United States.

    Research output: Contribution to conferencePoster

  21. Published

    Assessing the outcome of stroke : a comparison between MRI and clinical stroke scales. / Nuutinen, J; Liu, Y; Laakso, MP; Karonen, JO; Roivainen, R; Vanninen, RL; Partanen, K; Østergaard, Leif; Sivenius, J; Aronen, HJ.

    In: Acta Neurologica Scandinavica, Vol. 113, No. 2, 2006, p. 100-107.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  22. Published

    Automatic Correction For Signal Intensity Drift in Magnetic Resonance Diffusion Weighted Images. / Frandsen, Jesper; Sangill, Ryan; Østergaard, Leif; Zeidler, Dora; Vestergaard-Poulsen, Peter.

    2006. Poster session presented at Forskningens Dag, Århus, Denmark.

    Research output: Contribution to conferencePoster

  23. Published

    Automatic selection of arterial input function using cluster analysis. / Mouridsen, Kim; Christensen, Søren; Gyldensted, Louise; Østergaard, Leif.

    In: Magnetic Resonance in Medicine, Vol. 55, No. 3, 2006, p. 524-531.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  24. Published

    Bayesian estimation of perfusion parameters using a physiological model for the microvasculature. / Mouridsen, Kim; Friston, Karl; Hjort, Niels; Gyldensted, Louise; Østergaard, Leif; Kiebel, Stefan.

    In: NeuroImage, Vol. 33, No. 2, 2006, p. 570-579.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  25. Published

    Characterizing physiological heterogeneity of infarction risk in acute human ischaemic stroke using MRI. / Wu, Ona; Christensen, Søren; Hjort, Niels; Dijkhuizen, RM; Kucinski, T; Fiehler, J; Thomalla, G; Rother, J; Østergaard, Leif.

    In: Brain, Vol. 129, No. 9, 2006, p. 2384–2393.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  26. Published

    Contrast Bolus Magnetic Resonance Imaging in Alzheimer's Disease and Mild Cognitive Impairment. / Gyldensted, Louise; Mouridsen, Kim; Rodell, Anders; Østergaard, Leif; Gyldensted, Carsten.

    2006. Poster session presented at 10th International Conference on Alzheimer's Disease and Related Disorders, Madrid, Spain.

    Research output: Contribution to conferencePoster

  27. Published

    Diffusion weighted signal at short times in the presence of impermeable interfaces. / Frøhlich, Astrid From; Østergaard, Leif; Kiselev, Valerij G.

    2006. Poster session presented at Diffusion weighted signal at short times in the presence of impermeable interfaces, Seattle, United States.

    Research output: Contribution to conferencePoster

  28. Published

    Effect of Impermeable boundaries on Diffusion-Attenuated MR Signal. / Frøhlich, Astrid From; Østergaard, Leif; Kiselev, Valerij G.

    In: Journal of Magnetic Resonance, Vol. 179, 2006, p. 223-233.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  29. Published

    Hypofractionation: Effects on Growth and Vasculature in a Preclinical Tumour Model. / Nielsen, Thomas; Østergaard, Leif; Overgaard, Jens; Horsman, Michael Robert.

    2006. Abstract from 10th International Tumor Microenvironment Workshop, Boston, United States.

    Research output: Contribution to conferenceConference abstract for conference

  30. Published

    Imaging microvascular flow distribution using residue function shape characteristics. / Mouridsen, Kim; Kiebel, Stefan; Hjort, Niels; Østergaard, Leif.

    2006. Poster session presented at Imaging microvascular flow distribution using residue function shape characteristics, .

    Research output: Contribution to conferencePoster

  31. Published

    Implementing MRI based selection Criteria for Thrombolysis in Acute Stroke within the 3 hour window: Efficacy over a 2 year period. / Sølling, Christine; Hjort, Niels; Ashkanian, Mahmoud; Andersen, Grethe; Østergaard, Leif.

    2006. Abstract from Joint World Congress on Stroke 2006, Cape Town, South Africa.

    Research output: Contribution to conferenceConference abstract for conference

  32. Published

    It don't mean a thing... : Keeping the rhythm during polyrhythmic tension, activates language areas (BA47). / Vuust, Peter; Roepstorff, Andreas; Wallentin, Mikkel; Mouridsen, Kim; Østergaard, Leif.

    In: NeuroImage, Vol. 31, No. 2, 2006, p. 832-41.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  33. Published

    MRI Findings in Late-Onset Major Depression. / Dalby, Rikke Beese; Tehrani, Elisabeth; Ravnkilde, Barbara; Bruun, Louise Meldgaard; Jensen, Claus Zander; Ahdidan, Jamila; Østergaard, Leif; Rosenberg, Raben; Videbech, Poul.

    2006. Poster session presented at Dansk Psykiatrisk Selskabs Årsmøde, Nyborg, Denmark.

    Research output: Contribution to conferencePoster

  34. Published

    MRI Findings in Late-Onset Major Depression. / Dalby, Rikke Beese; Tehrani, Elisabeth; Ahdidan, Jamila; Sørensen, Leif Hougaard; Bek, Toke; Østergaard, Leif; Rosenberg, Raben; Videbech, Poul.

    2006. Poster session presented at Psykiatriens Forskningsdag, Århus, Denmark.

    Research output: Contribution to conferencePoster

  35. Published

    Månedens billede. / Hjort, Niels; Ashkanian, Mahmoud; Sølling, Christine; Andersen, Grethe; Østergaard, Leif.

    In: Ugeskrift for Laeger, Vol. 168, No. 38, 2006, p. 3230.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperLetter

  36. Published

    Preclinical studies on hypofractionation using a C3H mouse mammary carcinoma model. / Horsman, Michael Robert; Nielsen, Thomas; Østergaard, Leif; Overgaard, Jens.

    2006. Abstract from Third Acta Oncologica Symposium, København, Denmark.

    Research output: Contribution to conferenceConference abstract for conference

  37. Published

    Radiation administered as a large single dose or in a fractionated schedule : Role of the tumour vasculature as a target for influencing response. / Horsman, Michael R; Nielsen, Thomas; Østergaard, Leif; Overgaard, Jens.

    In: Acta Oncologica, Vol. 45, No. 7, 2006, p. 876-80.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  38. Published

    Regularization of Diffusion Tensor Fields in Axonal Fibre Tracking. / Frandsen, Jesper; Hobolth, Asger; Østergaard, Leif; Vestergaard-Poulsen, Peter; Vedel, Eva Bjørn.

    2006. Poster session presented at PhD Day 2006, The Faculty of Health Sciences, Aarhus, Denmark.

    Research output: Contribution to conferencePoster

  39. Published

    Relationship between combretastatin induced changes in DCEMRI parameters and radiation response in a murine tumour model. / Nielsen, Thomas; Murata, Rumi; Maxwell, Ross J.; Stødkilde-Jørgensen, Hans; Østergaard, Leif; Horsman, Michael Robert.

    2006. Abstract from PhD Day, University of Aarhus, Graduate School of Health Sciences, Århus, Denmark.

    Research output: Contribution to conferenceConference abstract for conference

  40. Published

    Relaxivity of blood pool contrast agent depends on the host tissue as suggested by semianalytical simulations. / Jensen, Birgitte Fuglsang; Østergaard, Leif; Kiselev, Valerij G.

    2006. Poster session presented at ISMRM 14th Scientific Meeting & Exhibition, Seattle, United States.

    Research output: Contribution to conferencePoster

  41. Published

    The Physiological Significance of the Tmax Parameter in Bolus Tracking MRI. / Christensen, Søren; Wu, Ona; Butcher, K; Hjort, Niels; Karstoft, Henrik; Davis, S; Østergaard, Leif.

    2006. Abstract from ISMRM 14th Annual Meeting, Seattle, United States.

    Research output: Contribution to conferenceConference abstract for conference

  42. Published

    The impact of susceptibility gradients on cartesian and spiral EPI for BOLD fMRI. / Sangill, Ryan; Wallentin, Mikkel; Østergaard, Leif; Vestergaard-Poulsen, Peter.

    In: Magnetic Resonance Materials in Physics, Biology and Medicine, Vol. 19, No. 3, 2006, p. 105-114.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  43. Published
  44. Published

    Theoretical model of intravascular paramagnetic tracers effect on tissue relaxation. / Kjølby, Birgitte Fuglsang; Østergaard, Leif; Kiselev, Valerij G.

    In: Magnetic Resonance in Medicine, Vol. 56, No. 1, 2006, p. 187-197.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  45. Published

    Thresholding Artefacts in sSVD and oSVD Deconvolution. / Gyldensted, Louise; Mouridsen, Kim; Østergaard, Leif.

    2006. Poster session presented at ISMRM 14th Scientific Meeting & Exhibition, Seattle, United States.

    Research output: Contribution to conferencePoster

  46. Published

    Tracking Vascular Supply Using Bolus Tracking MRI. / Christensen, Søren; Manka, C; Østergaard, Leif; Calamante, F.

    2006. Abstract from ISMRM 14th Annual Meeting, Seattle, United States.

    Research output: Contribution to conferenceConference abstract for conference

  47. Published

    Transfer constant and plasma volume fraction in dynamic contrast enhanced magnetic resonance imaging: different dependencies on tumour model, size, and antivascular treatment. / Nielsen, Thomas; Maxwell, R.J.; Stødkilde-Jørgensen, Hans; Østergaard, Leif; Horsman, Michael Robert.

    2006. Abstract from 13th Scientific Meeting of the International Society for Magnetic Resonance in Medicine, Miami, United States.

    Research output: Contribution to conferenceConference abstract for conference

  48. Published

    Trombolyse af apopleksipatienter : første års erfaringer og resultater på Århus Sygehus. / Sølling, Christine; Hjort, Niels; Ashkanian, Mahmoud; Weitzel-Mudersbach, Paul von; Østergaard, Leif; Andersen, Grethe.

    In: Ugeskr for Læger, Vol. 168, No. 25, 2006, p. 2452-2456.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  49. Published

    White Matter Lesions in Late-Onset Major Depression. / Dalby, Rikke Beese; Tehrani, Elisabeth; Ahdidan, Jamila; Sørensen, Leif Hougaard; Østergaard, Leif; Rosenberg, Raben; Videbech, Poul.

    2006. Poster session presented at Second Dual Congress on Psychiatry and the Neurosciences, Athen, Greece.

    Research output: Contribution to conferencePoster

  50. 2005
  51. Published

    Intravascular contrast agent-enhanced MRI measuring contrast clearance and tumor blood volume and the effects of vascular modifiers in an experimental tumor. / Bentzen, Lise; Vestergaard-Poulsen, Peter; Nielsen, Thomas; Overgaard, Jens; Bjørnerud, Atle; Briley-Saebø, Karen; Horsman, Michael R; Østergaard, Leif.

    In: International Journal of Radiation: Oncology - Biology - Physics, Vol. 61, No. 4, 15.03.2005, p. 1208-15.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  52. Published

    Abnormal intravoxel cerebral blood flow heterogeneity in human ischemic stroke determined by dynamic susceptibility contrast magnetic resonance imaging. / Perkiö, Jussi; Soinne, Lauri; Østergaard, Leif; Helenius, Johanna; Kangasmäki, Aki; Martinkauppi, Sami; Salonen, Oili; Savolainen, Sauli; Kaste, Markku; Tatlisumak, Turgut; Aronen, Hannu J.

    In: Stroke; a journal of cerebral circulation, Vol. 36, No. 1, 2005, p. 44-9.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  53. Published

    Applying instance-based techniques to prediction of final outcome in acute stroke. / Gottrup, Christian; Thomsen, Knud; Locht, Peter; Wu, Ona; Sorensen, A Gregory; Koroshetz, Walter J; Østergaard, Leif.

    In: Artificial Intelligence in Medicine, Vol. 33, No. 3, 2005, p. 223-36.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  54. Published

    A MRI-compatible stereotaxic localizer box enables high-precision stereotaxic procedures in minipigs. / Sørensen, Jens Christian H.; Bjarkam, Carsten; Cancian, Gratiano; Larsen, Mette; Rosendal, Frederikke; Ettrup, Kåre Sanden; Zeidler, Dora; Blankholm, Anne Dorthe; Østergaard, Leif; Sunde, Niels.

    2005. Abstract from 14th Meeting of the World Society for Stereotatic and Functional Neurosurgery, Rom, Italy.

    Research output: Contribution to conferenceConference abstract for conference

  55. Published

    Bayesian Estimation of perfusion Parameters Using a Physiological Model of the Microvasculature. / Mouridsen, Kim; Gyldensted, Louise; Friston, Karl; Østergaard, Leif; Kiebel, Stefan.

    2005. Poster session presented at ISMRM 2005, Miami, United States.

    Research output: Contribution to conferencePoster

  56. Published

    Cerebral metabolic response to low blood flow : possible role of cytochrome oxidase inhibition. / Gjedde, Albert; Johannsen, Peter; Cold, Georg; Østergaard, Leif.

    In: Journal of Cerebral Blood Flow and Metabolism, Vol. 25, No. 9, 2005, p. 1183-96.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  57. Published

    Concrete spatial language : see what I mean? / Wallentin, Mikkel; Østergaard, Svend; Lund, Torben Ellegaard; Østergaard, Leif; Roepstorff, Andreas.

    In: Brain and Language, Vol. 92, No. 3, 2005, p. 221-33.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  58. Published

    Effect of Impermeable Interfaces on Apparent Diffusion Coefficient in Heterogeneous Media. / Frøhlich, Astrid From; Østergaard, Leif; Kiselev, Valerij G.

    ESMRMB proceedings 2005. 2005. p. p.292, number 500.

    Research output: Contribution to book/anthology/report/proceedingConference abstract in proceedings

  59. Published

    Effect of Impermeable Interfaceson Apparent Diffusion Coefficient in Heterogeneous Media. / Frøhlich, Astrid From; Østergaard, Leif; Kiselev, Valerij G.

    In: Applied Magnetic Resonance, Vol. 29, 2005, p. 123-137.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  60. Published

    Ischemic injury detected by diffusion imaging 11 minutes after stroke. / Hjort, Niels; Christensen, Søren; Sølling, Christine; Ashkanian, Mahmoud; Wu, Ona; Røhl, Lisbeth; Gyldensted, Carsten; Andersen, Grethe; Østergaard, Leif.

    In: Annals of Neurology, Vol. 58, No. 3, 2005, p. 462-465.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  61. Published

    Magnetic ressonance imaging criteria for thrombolysis in acute cerebral infarct. / Hjort, Niels; Butcher, K; Davis, SM; Kidwell, CS; Koroshetz, WJ; Rother, J; Schellinger, PD; Warach, S; Østergaard, Leif.

    In: Stroke, Vol. 36, No. 2, 2005, p. 388-397.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  62. Published

    Motion verb sentences activate left posterior middle temporal cortex despite static context. / Wallentin, Mikkel; Lund, Torben Ellegaard; Østergaard, Svend; Østergaard, Leif; Roepstorff, Andreas.

    In: NeuroReport, Vol. 16, No. 6, 2005, p. 649-52.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  63. Published

    New Developments in Perfusion Imaging by Bolus Tracking. / Østergaard, Leif.

    In: Journal of Neuroradiology, Vol. 32, No. 5, 2005, p. 315-20.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  64. Published

    Perfusion Weighted MRI in Alzheimer's Disease and Mild Cognitive Impairment. / Gyldensted, Louise; Madsen, Jamila Ahdidan; Rodell, Anders; Mouridsen, Kim; Østergaard, Leif; Gyldensted, Carsten.

    2005. Poster session presented at ISMRM 13th Scientific Meeting & Exhibition, Miami, United States.

    Research output: Contribution to conferencePoster

  65. Published

    Predictive coding of rhythm - Brain responses to rhythmic incongruity. / Vuust, Peter; Roepstorff, Andreas; Pallesen, Karen Johanne; Bailey, Christopher; Østergaard, Leif.

    2005. Poster session presented at Human Brain Mapping 2005, Toronto, Canada.

    Research output: Contribution to conferencePoster

  66. Published

    Principles of Cerebral Perfusion Imaging by Bolus Tracking. / Østergaard, Leif.

    In: Journal of Magnetic Resonance Imaging, Vol. 22, No. 6, 2005, p. 710-717.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  67. Published

    Technical aspects of perfusion-weighted imaging. / Wu, Ona; Østergaard, Leif; Sørensen, AG.

    In: Neuroimaging Clinics of North America, Vol. 15, No. 3, 2005, p. 623-637.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  68. Published

    Theory of Susceptibility Induced Transverse Relaxation in the Capillary Network in the diffusion narrowing Regime. / Frøhlich, Astrid From; Østergaard, Leif; Kiselev, Valerij G.

    In: Magnetic Resonance in Medicine, Vol. 53, No. 3, 2005, p. 564-573.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  69. Published

    To musicians, the message is in the meter : Pre-attentive neuronal responses to incongruent rhythm are left-lateralized in musicians. / Vuust, Peter; Pallesen, Karen Johanne; Bailey, Christopher; van Zuijen, Titia; Gjedde, Albert; Roepstorff, Andreas; Østergaard, Leif.

    In: NeuroImage, Vol. 24, No. 2, 2005, p. 560-4.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  70. Published

    Trombolysebehandling til akut iskaemisk apopleksi : Dansk Neurologisk Selskab. / Andersen, Grethe; Ostergaard, Leif.

    In: Ugeskrift for Laeger, Vol. 167, No. 12-13, 2005, p. 1398.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  71. 2004
  72. Published

    A Hybrid Approach to Simulate the Transverse Relaxation Effect of the Vascular Network. / Kjølby, Birgitte Fuglsang; Østergaard, Leif; Kiselev, Valerij G.

    ESMRMB. ESMRMB, 2004.

    Research output: Contribution to book/anthology/report/proceedingArticle in proceedings

  73. Published

    A MRI-compatible stereotaxic localizer box enables high-precision stereotaxic procedures in pigs. / Bjarkam, Carsten Reidies; Cancian, G.; Larsen, M.; Rosendahl, F.; Ettrup, Kåre Schmidt Ettrup; Zeidler, Dora; Blankholm, Anne Dorte; Østergaard, Leif; Sunde, Niels; Sørensen, Jens Christian H.

    In: Journal of Neuroscience Methods, Vol. 139, No. 2, 2004, p. 293-298.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  74. Published

    A new intracerebral microinjection device enabling multiple minimally invasive injections of stem cells and therapeutics in a large cylindrical brain volume from one central injection tract. / Sørensen, Jens Christian H.; Bjarkam, Carsten; Larsen, Mette; Rosendal, Frederikke; Olsen, Aage K.; Østergaard, Leif; Zeidler, Dora; Blankholm, Anne Dorthe; Zimmer, Jens; Meyer, Morten; Scouten, Charles; Cunningham, Miles.

    2004. Abstract from 4th Forum of European Neuroscience, Lissabon, Portugal.

    Research output: Contribution to conferenceConference abstract for conference

  75. Published

    Cerebral perfusion imaging by bolus tracking. / Østergaard, Leif.

    In: Topics in Magnetic Resonance Imaging, Vol. 15, No. 1, 2004, p. 3-9.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  76. Published

    Cerebral perfusion imaging by exogenous contrast agents. / Østergaard, Leif; Barker, P. (Editor); Gillard, J. (Editor); Waldman, A. (Editor).

    Clinical MR Neuroimaging. Cambridge University Press, 2004. p. 3327-3229.

    Research output: Contribution to book/anthology/report/proceedingBook chapter

  77. Published

    Do indomethacin and propofol cause cerebral ischemic damage? : Diffusion-weighted magnetic resonance imaging in patients undergoing craniotomy for brain tumors. / Rasmussen, Mads; Østergaard, Leif; Juul, Niels; Gyldensted, Carsten; Poulsen, Peter V; Cold, Georg E.

    In: Anesthesiology, Vol. 101, No. 4, 2004, p. 872-878.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  78. Published

    Nye funktionelle MR-teknikker. Specielt med henblik på akut apopleksibehandling. / Østergaard, Leif; Røhl, Lisbeth; Andersen, Grethe.

    In: Maanedsskrift for Praktisk Laegegerning, Vol. 82, 2004, p. 46-61.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  79. Published

    Quantitative cerebral perfusion using the PRESTO acquisition scheme. / Pedersen, M.; Klarhöfer, M.; Christensen, Søren; Ouallet, J.P.; Østergaard, Leif; Dousset, V.; Moonen, C.

    In: Journal of Magnetic Resonance Imaging, Vol. 20, No. 6, 2004, p. 930-940.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  80. Published

    The importance of transverse relaxation in modeling water self diffusion in brain tissue. / Vestergaard-Poulsen, Peter; Jakobsen, Rikke; Hansen, Brian; Nørregaard Laursen, Troels; Østergaard, Leif.

    2004. Poster session presented at International Society of Magnetic Resonance in Medicine, Kyoto, 2004, .

    Research output: Contribution to conferencePoster

  81. Published

    Theoretical Analysis of Internal Accuracy of Perfusion Measurements at 1.5 T and 3 T. / Kjølby, Birgitte Fuglsang; Østergaard, Leif; Kiselev, Valerij G.

    Quantitative Cerebral Perfusion Imaging Using MRI: A Techincal Perspective. International Society of Magnetic Resonance in Medicine, 2004.

    Research output: Contribution to book/anthology/report/proceedingArticle in proceedings

  82. Published

    Theory of Susceptibility Induced Transverse Relaxation in the Capillary Network. / Frøhlich, Astrid From; Østergaard, Leif; Kiselev, Valerij G.

    Proceedings of the 12th Annual Meeting ISMRM Kyoto. 2004. p. p. 2308.

    Research output: Contribution to book/anthology/report/proceedingConference abstract in proceedings

  83. Published

    Tværdisciplinær forskning på CFIN : Center for Funktionelt Integrativ Neurovidenskab. / Østergaard, Leif.

    CFIN, 2004.

    Research output: Book/anthology/dissertation/reportBook

  84. 2003
  85. Published

    A porcine model for long-term stroke studies. / Olsen, Aage Kristian; Watanabe, Hideaki; Bjarkam, Carsten Reidies; Rodell, Anders; Zeidler, Dora; Blankholm, Anne Dorte; Cumming, Paul; Gyldensted, Carsten; Østergaard, Leif; Vestergaard-Poulsen, Peter; Gjedde, Albert.

    2003. Abstract from ScandLAS Symposium, Lahti, Finland.

    Research output: Contribution to conferenceConference abstract for conference

  86. Published

    Cerebral hemodynamics in a healthy population measured by dynamic susceptibility contrast MR imaging. / Helenius, J.; Perkio, J.; Soinne, L.; Østergaard, Leif; Carano, R.A.; Salonen, O.; Savolainen, S.; Kaste, M.; Aronen, H.J.; Tatlisumak, T.

    In: Acta Radiologica, Vol. 44, 2003, p. 538-546.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  87. Published

    Effects of tracer arrival time on flow estimates in MR perfusion-weighted imaging. / Wu, Ona; Østergaard, Leif; Koroshetz, Walter J; Schwamm, Lee H; O'Donnell, Joanie; Schaefer, Pamela W; Rosen, Bruce R; Weisskoff, Robert M; Sorensen, A Gregory.

    In: Magnetic Resonance in Medicine, Vol. 50, No. 4, 2003, p. 856-64.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  88. Published

    Evolving relations between cerebral blood flow and oxygen metabolism after middle cerebral artery occlusion in the porcine chronic stroke model. / Watanabe, Hideaki; Olsen, Aage Kristian; Bjarkam, Carsten Reidies; Rodell, Anders; Zeidler, Dora; Blankholm, Anne Dorte; Østergaard, Leif; Gyldensted, Carsten; Cumming, Paul; Gjedde, Albert.

    2003. Abstract from European Stroke Conference, Valencia, Spain.

    Research output: Contribution to conferenceConference abstract for conference

  89. Published

    Imaging system for obtaining quantative perfusion indices. / Østergaard, Leif (Inventor).

    Patent No.: USP 6542769. Mar 20, 2000.

    Research output: Patent

  90. Published

    PET og hjernearbejde. Energiforsyning og stofomsætning i hjernen. / Gjedde, Albert Hellmut; Vafaee, Manouchehr Seyedi; Østergaard, Leif; Rodell, Anders (Editor).

    På sporet af det indre liv. PET i Århus 1993-2003. Professionelle og Eksperimenterende Tekster, Århus, 2003. p. 137-149.

    Research output: Contribution to book/anthology/report/proceedingBook chapter

  91. Published

    Prediction of tissue survival after stroke based on changes in the apparent diffusion of water (cytotoxic edema). / Sakoh, M; Ohnishi, T; Østergaard, Leif; Gjedde, A.

    Brain Edema XII: Proceedings of the 12th International Symposium, Hakone, Japan, November 10–13, 2002. ed. / T Kuroiwa; A Baethmann; Z Czernicki; J T Hoff; U Ito; Y Katayama; A Marmarou; B A D Mendelow; H-J Reulen. Vol. 86 2003. p. 137-40.

    Research output: Contribution to book/anthology/report/proceedingBook chapter

  92. Published

    Tracer arrival effects on flow estimates in MR perfusion-weighted imaging. / Wu, Ona; Østergaard, Leif; Koroshetz, W.J.; Schwamm, L.H.; ODonnell, J.; Schaefer, P.W.; Rosen, B.R.; Weisskoff, R.M.; Sorensen, A.G.

    In: Magnetic Resonance in Medicine, Vol. 50, No. 4, 2003, p. 856-864.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  93. Published

    Tracer arrival timing insensitive technique for estimating flow in MR perfusion-weighted imaging using singular value decomposition with a block-circulant deconvolution matrix. / Wu, Ona; Østergaard, Leif; Koroshetz, W.J.; Schwamm, L.H.; ODonnell, J.; Schaefer, P.W.; Rosen, B.R.; Weisskoff, R.M.; Sorensen, A.G.

    In: Magnetic Resonance in Medicine, Vol. 50, No. 1, 2003, p. 164-174.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  94. 2002
  95. Published

    Iron-induced susceptibility effect at the globus pallidus causes underestimation of flow and volume on dynamic susceptibility contrast-enhanced MR perfusion images. / Yamada, Kei; Gonzalez, R Gilberto; Østergaard, Leif; Komili, Suzanne; Weisskoff, Robert M; Rosen, Bruce R; Koroshetz, Walter J; Nishimura, Tsunehiko; Sorensen, A Gregory.

    In: American Journal of Neuroradiology, Vol. 23, No. 6, 14.06.2002, p. 1022-9.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  96. Published

    Evaluation of four postprocessing methods for determination of cerebral blood volume and mean transit time by dynamic susceptibility contrast imaging. / Perkiö, Jussi; Aronen, Hannu J; Kangasmäki, Aki; Liu, Yawu; Karonen, Jari; Savolainen, Sauli; Østergaard, Leif.

    In: Magnetic Resonance in Medicine, Vol. 47, No. 5, 2002, p. 973-81.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  97. Published

    Final infarct size after acute stroke : prediction with flow heterogeneity. / Simonsen, Claus Z; Røhl, Lisbeth; Vestergaard-Poulsen, Peter; Gyldensted, Carsten; Andersen, Grethe; Østergaard, Leif.

    In: Radiology, Vol. 225, No. 1, 2002, p. 269-75.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  98. Published

    Magnetic resonance perfusion-weighted imaging of acute cerebral infarction: effect of the calculation methods and underlying vasculopathy. / Yamada, Kei; Wu, Ona; Gonzalez, R Gilberto; Bakker, Dirk; Østergaard, Leif; Copen, William A; Weisskoff, Robert M; Rosen, Bruce R; Yagi, Katsumi; Nishimura, Tsunehiko; Sorensen, A Gregory.

    In: Stroke; a journal of cerebral circulation, Vol. 33, No. 1, 2002, p. 87-94.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  99. Published

    Perfusion-weighted MRI in human acute ischemic stroke : a comparison with the progression of the infarct on diffusion-weighted images. / Aronen, Hannu J; Perkiö, Jussi; Karonen, Jari O; Vanninen, Ritva L; Østergaard, Leif; Liu, Yawu; Könönen, Mervi; Vanninen, Esko J; Soimakallio, Seppo; Kuikka, Jyrki T.

    In: Academic Radiology, Vol. 9, No. Suppl 1, 2002, p. S160-4.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  100. Published

    Time evolution of cerebral perfusion and apparent diffusion coefficient measured by magnetic resonance imaging in a porcine stroke model. / Røhl, Lisbeth; Sakoh, Masaharuh; Simonsen, Claus Ziegler; Vestergaard-Poulsen, Peter; Sangill, Ryan; Sørensen, Jens Christian H.; Bjarkam, Carsten; Gyldensted, Carsten; Østergaard, Leif.

    In: Journal of Magnetic Resonance Imaging, Vol. 15, No. 2, 2002, p. 123-9.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  101. 2001
  102. Published

    Correlation between diffusion- and perfusion-weighted MRI and neurological deficit measured by the Scandinavian Stroke Scale and Barthel Index in hyperacute subcortical stroke (< or = 6 hours). / Røhl, Lisbeth; Geday, Jacob; Østergaard, Leif; Simonsen, Claus Ziegler; Vestergaard-Poulsen, Peter; Andersen, Grethe; Le Bihan, D.; Gyldensted, C.

    In: Cerebrovascular Diseases, Vol. 12, No. 3, 2001, p. 203-213.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  103. Published

    Diffusion and perfusion MR imaging in acute ischemic stroke : a comparison to SPECT. / Karonen, J O; Østergaard, Leif; Vainio, P; Partanen, K; Vanninen, R; Vanninen, E; Korhonen, K; Haapamäki, S; Liu, Y; Roivainen, R; Onatsu, J; Nuutinen, J; Könönen, M; Sivenius, J; Kuikka, J; Aronen, H J.

    In: Computer Methods and Programs in Biomedicine, Vol. 66, No. 1, 2001, p. 125-8.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  104. Published

    FDOPA metabolism in the adult porcine brain: influence of tracer circulation time and VOI selection on estimates of striatal DOPA decarboxylation. / Danielsen, E H; Smith, D F; Andersen, Flemming; Gee, A D; Bender, D; Hansen, Søren Baarsgaard; Hermansen, F; Østergaard, L; Cumming, P; Gjedde, A.

    In: Journal of Neuroscience Methods, Vol. 111, No. 2, 2001, p. 157-68.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  105. Published

    MR-scanning ved akut apopleksi. / Simonsen, Claus Ziegler; Røhl, L; Østergaard, L; Vestergaard-Poulsen, P; Andersen, Grethe; Gyldensted, C.

    In: Ugeskrift for Laeger, Vol. 163, No. 17, 2001, p. 2368-72.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  106. Published

    Predicting tissue outcome in acute human cerebral ischemia using combined diffusion- and perfusion-weighted MR imaging. / Wu, O; Koroshetz, W J; Østergaard, Leif; Buonanno, F S; Copen, W A; Gonzalez, R G; Rordorf, G; Rosen, B R; Schwamm, L H; Weisskoff, R M; Sorensen, A G.

    In: Stroke; a journal of cerebral circulation, Vol. 32, No. 4, 2001, p. 933-42.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  107. Published

    Prediction of tissue survival after middle cerebral artery occlusion based on changes in the apparent diffusion of water. / Sakoh, M; Østergaard, Leif; Gjedde, A; Røhl, L; Vestergaard-Poulsen, P; Smith, D F; Le Bihan, D; Sakaki, S; Gyldensted, C.

    In: Journal of Neurosurgery, Vol. 95, No. 3, 2001, p. 450-8.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article