Leif Østergaard

  1. 1995
  2. Published

    MR perfusion studies with T1-weighted echo planar imaging. / Kwong, K K; Chesler, D A; Weisskoff, R M; Donahue, K M; Davis, T L; Østergaard, Leif; Campbell, T A; Rosen, B R.

    In: Magnetic Resonance in Medicine, Vol. 34, No. 6, 1995, p. 878-87.

    Research output: Research - peer-reviewJournal article

  3. 1996
  4. Published

    High resolution measurement of cerebral blood flow using intravascular tracer bolus passages. Part I: Mathematical approach and statistical analysis. / Østergaard, Leif; Weisskoff, R M; Chesler, D A; Gyldensted, C; Rosen, B R.

    In: Magnetic Resonance in Medicine, Vol. 36, No. 5, 1996, p. 715-25.

    Research output: Research - peer-reviewJournal article

  5. Published

    High resolution measurement of cerebral blood flow using intravascular tracer bolus passages. Part II: Experimental comparison and preliminary results. / Østergaard, Leif; Sorensen, A G; Kwong, K K; Weisskoff, R M; Gyldensted, C; Rosen, B R.

    In: Magnetic Resonance in Medicine, Vol. 36, No. 5, 1996, p. 726-36.

    Research output: Research - peer-reviewJournal article

  6. 1997
  7. Published

    Contrast agents in functional MR imaging. / Sorensen, A G; Tievsky, A L; Østergaard, Leif; Weisskoff, R M; Rosen, B R.

    In: Journal of Magnetic Resonance Imaging, Vol. 7, No. 1, 1997, p. 47-55.

    Research output: Research - peer-reviewJournal article

  8. Published
  9. 1998
  10. Published

    Absolute cerebral blood flow and blood volume measured by magnetic resonance imaging bolus tracking: comparison with positron emission tomography values. / Østergaard, Leif; Smith, D F; Vestergaard-Poulsen, Peter; Hansen, Søren Baarsgaard; Gee, A D; Gjedde, A; Gyldensted, C.

    In: Journal of Cerebral Blood Flow and Metabolism, Vol. 18, No. 4, 1998, p. 425-32.

    Research output: Research - peer-reviewJournal article

  11. Published

    Cerebral blood flow measurements by magnetic resonance imaging bolus tracking: comparison with [(15)O]H2O positron emission tomography in humans. / Østergaard, Leif; Johannsen, P; Høst-Poulsen, P; Vestergaard-Poulsen, P; Asboe, H; Gee, A D; Hansen, Søren Baarsgaard; Cold, G E; Gjedde, A; Gyldensted, C.

    In: Journal of Cerebral Blood Flow and Metabolism, Vol. 18, No. 9, 1998, p. 935-40.

    Research output: Research - peer-reviewJournal article

  12. Published

    Perfusion-weighted imaging defects during spontaneous migrainous aura. / Cutrer, F M; Sorensen, A G; Weisskoff, R M; Østergaard, Leif; Sanchez del Rio, M; Lee, E J; Rosen, B R; Moskowitz, M A.

    In: Annals of Neurology, Vol. 43, No. 1, 1998, p. 25-31.

    Research output: Research - peer-reviewJournal article

  13. 1999
  14. Published

    An evaluation of the time dependence of the anisotropy of the water diffusion tensor in acute human ischemia. / Zelaya, F; Flood, N; Chalk, J B; Wang, D; Doddrell, D M; Strugnell, W; Benson, M; Østergaard, Leif; Semple, J; Eagle, S.

    In: Magnetic Resonance Imaging, Vol. 17, No. 3, 1999, p. 331-48.

    Research output: Research - peer-reviewJournal article

  15. Published

    CBF and CBV measurements by USPIO bolus tracking: reproducibility and comparison with Gd-based values. / Simonsen, Claus Ziegler; Østergaard, Leif; Vestergaard-Poulsen, P; Røhl, L; Bjørnerud, A; Gyldensted, C.

    In: Journal of Magnetic Resonance Imaging, Vol. 9, No. 2, 1999, p. 342-7.

    Research output: Research - peer-reviewJournal article

  16. Published

    Combined diffusion and perfusion MRI with correlation to single-photon emission CT in acute ischemic stroke. Ischemic penumbra predicts infarct growth. / Karonen, J O; Vanninen, R L; Liu, Y; Østergaard, Leif; Kuikka, J T; Nuutinen, J; Vanninen, E J; Partanen, P L; Vainio, P A; Korhonen, K; Perkiö, J; Roivainen, R; Sivenius, J; Aronen, H J.

    In: Stroke, Vol. 30, No. 8, 1999, p. 1583-90.

    Research output: Research - peer-reviewJournal article

  17. Published

    Early changes measured by magnetic resonance imaging in cerebral blood flow, blood volume, and blood-brain barrier permeability following dexamethasone treatment in patients with brain tumors. / Østergaard, Leif; Hochberg, F H; Rabinov, J D; Sorensen, A G; Lev, M; Kim, L; Weisskoff, R M; Gonzalez, R G; Gyldensted, C; Rosen, B R.

    In: Journal of Neurosurgery, Vol. 90, No. 2, 1999, p. 300-5.

    Research output: Research - peer-reviewJournal article

  18. Published

    Hyperacute stroke: simultaneous measurement of relative cerebral blood volume, relative cerebral blood flow, and mean tissue transit time. / Sorensen, A G; Copen, W A; Østergaard, Leif; Buonanno, F S; Gonzalez, R G; Rordorf, G; Rosen, B R; Schwamm, L H; Weisskoff, R M; Koroshetz, W J.

    In: Radiology, Vol. 210, No. 2, 1999, p. 519-27.

    Research output: Research - peer-reviewJournal article

  19. Published

    Modeling cerebral blood flow and flow heterogeneity from magnetic resonance residue data. / Østergaard, Leif; Chesler, D A; Weisskoff, R M; Sorensen, A G; Rosen, B R.

    In: Journal of Cerebral Blood Flow and Metabolism, Vol. 19, No. 6, 1999, p. 690-9.

    Research output: Research - peer-reviewJournal article

  20. Published

    NC100150-enhanced 3D-SPGR MR angiography of the common carotid artery in a pig vascular stenosis model : Quantification of stenosis and dose optimization. / Røhl, L; Østergaard, Leif; Simonsen, Claus Ziegler; Vestergaard-Poulsen, P; Sørensen, L; Bjørnerud, A; Saebø, K B; Gyldensted, C.

    In: Acta Radiologica, Vol. 40, No. 3, 1999, p. 282-90.

    Research output: Research - peer-reviewJournal article

  21. Published

    On the oxygenation of hemoglobin in the human brain. / Gjedde, A; Poulsen, P H; Østergaard, Leif.

    Oxygen Transport to Tissue XXI. ed. / Andras Eke; David T Delpy. Vol. 471 Springer Publishing Company, 1999. p. 67-81.

    Research output: ResearchBook chapter

  22. Published

    Perfusion weighted imaging during migraine : spontaneous visual aura and headache. / Sanchez del Rio, M; Bakker, D; Wu, O; Agosti, R; Mitsikostas, D D; Østergaard, Leif; Wells, W A; Rosen, B R; Sorensen, G; Moskowitz, M A; Cutrer, F M.

    In: Cephalalgia, Vol. 19, No. 8, 1999, p. 701-7.

    Research output: Research - peer-reviewJournal article

  23. 2000
  24. Published

    Assessment of regional cerebral blood flow by dynamic susceptibility contrast MRI using different deconvolution techniques. / Wirestam, R.; Andersson, L.; Østergaard, Leif; Bolling, M.; Aunola, J.; Lindgren, A.; Geijer, B.; Holtås, S.; Ståhlberg, F.

    In: Magnetic Resonance in Medicine, Vol. 43, No. 5, 2000, p. 691-700.

    Research output: Research - peer-reviewJournal article

  25. Published

    Cerebral Hemodynamics in Human Acute Ischemic Stroke : A Study with Diffusion- and Perfusion-Weighted Magnetic Resonance Imaging and SPECT. / Liu, Y.; Karonen, J.O.; Vanninen, R.L.; Østergaard, Leif; Roivainen, R.; Nuutinen, J.; Perkiö, J.P.; Könönen, M.; Hämäläinen, A.; Vanninen, E.J.; Soimakallio, S.; Kuikka, J.T.; Aronen, H.J.

    In: Journal of Cerebral Blood Flow and Metabolism, Vol. 20, No. 6, 2000, p. 910-920.

    Research output: Research - peer-reviewJournal article

  26. Published
  27. Published

    Cerebral blood flow in volunteers measured by PET and Xe CT/CBF : A comparison. / Bergholt, Bo; Østergaard, Leif; Oettingen, Gorm von; Johannsen, P.; Poulsen, P.H.; Bundgaard, H.; Asboe, H.; Cold, Georg; Gjedde, Albert; Gyldensted, C.; Astrup, Jens.

    In: Keio Journal of Medicine, Vol. 49, No. Suppl 1, 2000, p. 55-57.

    Research output: ResearchJournal article

  28. Published

    Cerebral hemodynamics in CADASIL before and after acetazolamide challenge assessed with MRI bolus tracking. / Chabriat, H; Pappata, S; Østergaard, Leif; Clark, C A; Pachot-Clouard, M; Vahedi, K; Jobert, A; Le Bihan, D; Bousser, M G.

    In: Stroke, Vol. 31, No. 8, 2000, p. 1904-12.

    Research output: Research - peer-reviewJournal article

  29. Published

    Combined diffusion-weighted and perfusion-weighted flow heterogeneity magnetic resonance imaging in acute stroke. / Østergaard, Leif; Sorensen, A G; Chesler, D A; Weisskoff, R M; Koroshetz, W J; Wu, O; Gyldensted, C; Rosen, B R.

    In: Stroke, Vol. 31, No. 5, 2000, p. 1097-103.

    Research output: Research - peer-reviewJournal article

  30. Published

    Combined perfusion- and diffusion-weighted MR imaging in acute ischemic stroke during the 1st week : a longitudinal study. / Karonen, J O; Liu, Y; Vanninen, R L; Østergaard, Leif; Kaarina Partanen, P L; Vainio, P A; Vanninen, E J; Nuutinen, J; Roivainen, R; Soimakallio, S; Kuikka, J T; Aronen, H J.

    In: Radiology, Vol. 217, No. 3, 2000, p. 886-94.

    Research output: Research - peer-reviewJournal article

  31. Published

    Comparison of Gd-DTPA BMA and NC100150 Enhancement Patterns in C3H Mammary Carcinoma Bearing Mice. / Østergaard, Leif; Vestergaard-Poulsen, Peter; Bentzen, Lise Nørgaard; Horsman, M.R.; Overgaard, Jens; Bjørnerud, A.; Briley-Sæbø, K.; Gyldensted, C.

    Proc. Intl. Sot. Mag. Reson. Med. 8. 2000. p. 2019-2019.

    Research output: ResearchArticle in proceedings

  32. Published

    Comparison of gradient- and spin-echo imaging: CBF, CBV, and MTT measurements by bolus tracking. / Simonsen, Claus Ziegler; Østergaard, Leif; Smith, D F; Vestergaard-Poulsen, P; Gyldensted, C.

    In: Journal of Magnetic Resonance Imaging, Vol. 12, No. 3, 2000, p. 411-6.

    Research output: Research - peer-reviewJournal article

  33. Published

    Determination of Cerebral Blood Volume and Mean Transit Time by Dynamic Contrast Enhanced MR Imaging in Patients with Acute Stroke : A Comparison of Four Post Processing Methods. / Perkiö, J.; Aronen, H.J.; Karonen, J.; Liu, Y.; Savolainen, S.; Østergaard, Leif.

    Proc. Intl. Sot. Mag. Reson. Med. 8. 2000. p. 527-527.

    Research output: ResearchArticle in proceedings

  34. Published

    Dynamic MR Bolus Tracking in Hyperacute Stroke : Comparison with Diffusion Weighted MR Imaging. / Perkiö, J.; Soinne, L.; Østergaard, Leif; Tatlisumak, T.; Kangsmäki, A.; Helenius, J.; Martinkauppi, S.; Salonen, O.; Savolainen, S.; Kaste, M.; Aronen, H.J.

    Proc. Intl. Soc. Mag. Reson. Med. 8. 2000. p. 450-450.

    Research output: ResearchArticle in proceedings

  35. Published

    Human Cerebral Blood Flow Maps Improve with Higher Concentration of Contrast Agent. / Benner, T.; Tombach, B.; Synnott, J.P.; Schuierer, G.; Reimer, P.; Geens, V.; Østergaard, Leif; Sorensen, A.G.

    ISMRM 8th Scientific Meeting & Exhibition - Proceedings. 2000.

    Research output: Research - peer-reviewArticle in proceedings

  36. Published

    MR Residue Detection: Modeling Cerebral Blood Flow and Flow Heterogeneity : With Special Reference to Acute Stroke. / Østergaard, Leif.

    Aarhus : Faculty of Health Sciences, Aarhus University, 2000. 30 p.

    Research output: ResearchDoctoral thesis

  37. Published

    Methodological Aspects of Cerebral Blood Flow Measurements : With Special Reference to Monitoring Anti-Edema Drug Action in Brain Tumor Patients. / Østergaard, Leif.

    Aarhus : Faculty of Health Sciences, Aarhus University, 2000. 24 p.

    Research output: ResearchPh.D. thesis

  38. Published

    NC100150 Enhanced Imaging Offers the Possibility to Monitor Pharmacological Modification of Tumor Blood Flow and Blood Volume in Experimental Tumors in Mice. / Bentzen, Lise Nørgaard; Vestergaard-Poulsen, Peter; Horsman, M.R.; Overgaard, Jens; Bjørnerud, A.; Briley-Sæbø, K.; Gyldensted, C.; Østergaard, Leif.

    ISMRM 8th Scientific Meeting & Exhibition - Proceedings. 2000. 2030.

    Research output: Research - peer-reviewArticle in proceedings

  39. Published

    Pulmonary function affects the quantification of rCBF by non-invasive xenon methods. / von Oettingen, G; Bergholt, B; Rasmussen, M; Østergaard, Leif; Astrup, J.

    In: Journal of Neuroscience Methods, Vol. 95, No. 2, 2000, p. 159-69.

    Research output: Research - peer-reviewJournal article

  40. Published

    Quantification of Cerebral Blood Flow by Using Bolus Tracking and Artery Spin Tagging Methods. / Li, T-Q.; Chen, Z.G.; Østergaard, Leif; Hindmarsh, T.; Moseley, M.E.

    In: Magnetic Resonance Imaging, Vol. 18, No. 5, 2000, p. 503-512.

    Research output: Research - peer-reviewJournal article

  41. Published

    Quantitative perfusion imaging in carotid artery stenosis using dynamic susceptibility contrast-enhanced magnetic resonance imaging. / Lythgoe, D J; Østergaard, Leif; William, S C; Cluckie, A; Buxton-Thomas, M; Simmons, A; Markus, H S.

    In: Magnetic Resonance Imaging, Vol. 18, No. 1, 2000, p. 1-11.

    Research output: Research - peer-reviewJournal article

  42. Published

    Reduced cerebral blood flow in white matter in ischaemic leukoaraiosis demonstrated using quantitative exogenous contrast based perfusion MRI. / Markus, H.S.; Lythgoe, D.; Østergaard, Leif; O'Sullivan, M.; Williams, S.C.R.

    In: Journal of Neurology, Neurosurgery and Psychiatry, Vol. 69, No. 1, 2000, p. 48-53.

    Research output: Research - peer-reviewJournal article

  43. Published

    Regional cerebral blood flow distributions in normal volunteers: dynamic susceptibility contrast MRI compared with 99mTc-HMPAO SPECT. / Wirestam, R; Ryding, E; Lindgren, A; Geijer, B; Østergaard, Leif; Andersson, L; Holtås, S; Ståhlberg, F.

    In: Journal of Computer Assisted Tomography, Vol. 24, No. 4, 2000, p. 526-30.

    Research output: Research - peer-reviewJournal article

  44. Published
  45. Published

    The DaNeX Study of Fetal Embryonic Mesencephalic Dopaminergic Tissue Grafted to a Minipig model of Parkinson's disease : Preliminary Findings of Effect of MPTP-Poisoning on Striatal Dopaminergic Markers. / Danielsen, Erik Hvid; Cumming, Paul; Andersen, F.; Bender, D.; Brevig, T.; Falborg, L.; Gee, A.; Gillings, N.M.; Hansen, S.B.; Hermansen, F.; Johansen, J.; Johansen, T.E.; Dahl-Jørgensen, A.; Jørgensen, H.A.; Meyer, M.; Munk, Ole Lajord; Pedersen, E.B.; Poulsen, P.H.; Rodell, A.B.; Sakoh, M.; Simonsen, Claus Ziegler; Smith, Donald F.; Sørensen, J.C.; Østergaard, Leif; Zimmer, J.; Gjedde, Albert; Møller, Arne.

    In: Cell Transplantation, Vol. 9, No. 2, 2000, p. 247-259.

    Research output: Research - peer-reviewJournal article

  46. Published

    The influence of the input function on quantitative rCBF by the Xe/CT method. / Oettingen, Gorm von; Bergholt, Bo; Østergaard, Leif; Rasmussen, Mads; Gyldensted, Carsten; Astrup, Jens.

    In: Keio Journal of Medicine, Vol. 49, No. Suppl 1, 2000, p. 11-15.

    Research output: Research - peer-reviewConference article

  47. Published

    Viability Thresholds of the Penumbra of Acute Human Ischemic Stroke Defined from rCBF and rCBV. / Røhl, Lisbeth; Østergaard, Leif; Simonsen, Claus Ziegler; Vestergaard-Poulsen, Peter; Andersen, Grethe; Le Bihan, D.; Gyldensted, Carsten.

    In: Proc ISMRM, 2000, p. 452-452.

    Research output: Research - peer-reviewJournal article

  48. Published

    Xenon CT cerebral blood flow in patients with head injury: influence of pulmonary trauma on the input function. / von Oettingen, G; Bergholt, Bo; Østergaard, Leif; Jensen, Lars Christian; Gyldensted, C; Astrup, Jens.

    In: Neuroradiology, Vol. 42, No. 3, 2000, p. 168-73.

    Research output: Research - peer-reviewJournal article

  49. 2001
  50. Published
  51. 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: Research - peer-reviewJournal article

  52. 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: Research - peer-reviewJournal article

  53. 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: Research - peer-reviewJournal article

  54. 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: Research - peer-reviewJournal article

  55. 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: Research - peer-reviewJournal article

  56. Published

    Quantitative measurements of cerebral blood flow in patients with unilateral carotid artery occlusion : a PET and MR study. / Lin, W; Celik, A; Derdeyn, C; An, H; Lee, Y; Videen, T; Østergaard, Leif; Powers, W J.

    In: Journal of Magnetic Resonance Imaging, Vol. 14, No. 6, 2001, p. 659-67.

    Research output: Research - peer-reviewJournal article

  57. Published

    System for determining haemodynamic indices by use of tomographic data. / Østergaard, Leif (Inventor).

    Patent No.: EP 1171028. Mar 23, 2000.

    Research output: ResearchPatent

  58. Published

    Viability thresholds of ischemic penumbra of hyperacute stroke defined by perfusion-weighted MRI and apparent diffusion coefficient. / Røhl, Lisbeth; Østergaard, Leif; Simonsen, Claus Ziegler; Vestergaard-Poulsen, Peter; Andersen, Grethe; Sakoh, M.; Le Bihan, D.; Gyldensted, Carsten.

    In: Stroke, Vol. 32, 2001, p. 1140-1146.

    Research output: Research - peer-reviewJournal article

  59. Published

    [14C]Serotonin uptake and [O-methyl-11C]venlafaxine kinetics in porcine brain. / Smith, D F; Hansen, Søren Baarsgaard; Østergaard, L; Gee, A D; Danielsen, E; Ishizu, K; Bender, D; Poulsen, P H; Gjedde, A.

    In: Nuclear Medicine and Biology, Vol. 28, No. 6, 2001, p. 633-8.

    Research output: Research - peer-reviewJournal article

  60. 2002
  61. 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: Research - peer-reviewJournal article

  62. 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: Research - peer-reviewJournal article

  63. 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: Research - peer-reviewJournal article

  64. 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: Research - peer-reviewJournal article

  65. Published
  66. 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: Research - peer-reviewJournal article

  67. 2003
  68. 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: ResearchConference abstract for conference

  69. 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: ResearchJournal article

  70. 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: Research - peer-reviewJournal article

  71. Published
  72. Published

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

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

    Research output: ResearchPatent

  73. 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: ResearchBook chapter

  74. 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: Research - peer-reviewBook chapter

  75. 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: Research - peer-reviewJournal article

  76. 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: Research - peer-reviewJournal article

  77. 2004
  78. 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: Research - peer-reviewArticle in proceedings

  79. 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: ResearchJournal article

  80. 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: ResearchConference abstract for conference

  81. 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: ResearchJournal article

  82. 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: ResearchBook chapter

  83. Published
  84. 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: ResearchJournal article

  85. 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: Research - peer-reviewJournal article

  86. 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: ResearchPoster

  87. 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: Research - peer-reviewArticle in proceedings

  88. 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: ResearchConference abstract in proceedings

  89. Published
  90. 2005
  91. 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: Research - peer-reviewJournal article

  92. 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: Research - peer-reviewJournal article

  93. 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: ResearchConference abstract for conference

  94. 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: ResearchPoster

  95. 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: Research - peer-reviewJournal article

  96. 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: Research - peer-reviewJournal article

  97. 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: ResearchConference abstract in proceedings

  98. 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: Research - peer-reviewJournal article

  99. 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: Research - peer-reviewJournal article

  100. 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: Research - peer-reviewJournal article

  101. 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: Research - peer-reviewJournal article

  102. 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: ResearchJournal article

  103. 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: ResearchPoster

  104. 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: ResearchPoster

  105. 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: Research - peer-reviewJournal article

  106. 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: Research - peer-reviewJournal article

  107. 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: Research - peer-reviewJournal article

  108. 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: Research - peer-reviewJournal article

  109. 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: Research - peer-reviewJournal article

  110. 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: Research - peer-reviewJournal article

  111. 2006
  112. 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: Research - peer-reviewArticle in proceedings

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