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Wu, O., Østergaard, L., Koroshetz, W. J., Schwamm, L. H., O'Donnell, J., Schaefer, P. W., Rosen, B. R., Weisskoff, R. M. & Sorensen, A. G. (2003). Effects of tracer arrival time on flow estimates in MR perfusion-weighted imaging. Magnetic Resonance in Medicine, 50(4), 856-64. https://doi.org/10.1002/mrm.10610
Gjedde, A. H., Vafaee, M. S., Østergaard, L. & Rodell, A. (Ed.) (2003). PET og hjernearbejde. Energiforsyning og stofomsætning i hjernen. In På sporet af det indre liv. PET i Århus 1993-2003 (pp. 137-149). Professionelle og Eksperimenterende Tekster, Århus.
Sakoh, M., Ohnishi, T., Østergaard, L. & Gjedde, A. (2003). Prediction of tissue survival after stroke based on changes in the apparent diffusion of water (cytotoxic edema). In T. Kuroiwa, A. Baethmann, Z. Czernicki, J. T. Hoff, U. Ito, Y. Katayama, A. Marmarou, B. A. D. Mendelow & H.-J. Reulen (Eds.), Brain Edema XII: Proceedings of the 12th International Symposium, Hakone, Japan, November 10–13, 2002 (Vol. 86, pp. 137-40) https://doi.org/10.1007/978-3-7091-0651-8_29
Wu, O., Østergaard, L., Koroshetz, W. J., Schwamm, L. H., ODonnell, J., Schaefer, P. W., Rosen, B. R., Weisskoff, R. M. & Sorensen, A. G. (2003). Tracer arrival timing insensitive technique for estimating flow in MR perfusion-weighted imaging using singular value decomposition with a block-circulant deconvolution matrix. Magnetic Resonance in Medicine, 50(1), 164-174. https://doi.org/10.1002/mrm.10522
Perkiö, J., Aronen, H. J., Kangasmäki, A., Liu, Y., Karonen, J., Savolainen, S. & Østergaard, L. (2002). Evaluation of four postprocessing methods for determination of cerebral blood volume and mean transit time by dynamic susceptibility contrast imaging. Magnetic Resonance in Medicine, 47(5), 973-81. https://doi.org/10.1002/mrm.10126
Yamada, K., Gonzalez, R. G., Østergaard, L., Komili, S., Weisskoff, R. M., Rosen, B. R., Koroshetz, W. J., Nishimura, T. & Sorensen, A. G. (2002). Iron-induced susceptibility effect at the globus pallidus causes underestimation of flow and volume on dynamic susceptibility contrast-enhanced MR perfusion images. American Journal of Neuroradiology, 23(6), 1022-9.
Yamada, K., Wu, O., Gonzalez, R. G., Bakker, D., Østergaard, L., Copen, W. A., Weisskoff, R. M., Rosen, B. R., Yagi, K., Nishimura, T. & Sorensen, A. G. (2002). Magnetic resonance perfusion-weighted imaging of acute cerebral infarction: effect of the calculation methods and underlying vasculopathy. Stroke; a journal of cerebral circulation, 33(1), 87-94. https://doi.org/10.1161/hs0102.101893
Aronen, H. J., Perkiö, J., Karonen, J. O., Vanninen, R. L., Østergaard, L., Liu, Y., Könönen, M., Vanninen, E. J., Soimakallio, S. & Kuikka, J. T. (2002). Perfusion-weighted MRI in human acute ischemic stroke: a comparison with the progression of the infarct on diffusion-weighted images. Academic Radiology, 9(Suppl 1), S160-4. https://doi.org/10.1016/S1076-6332(03)80427-0
Karonen, J. O., Østergaard, L., 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. (2001). Diffusion and perfusion MR imaging in acute ischemic stroke: a comparison to SPECT. Computer Methods and Programs in Biomedicine, 66(1), 125-8. https://doi.org/10.1016/S0169-2607(01)00146-8
Wu, O., Koroshetz, W. J., Østergaard, L., Buonanno, F. S., Copen, W. A., Gonzalez, R. G., Rordorf, G., Rosen, B. R., Schwamm, L. H., Weisskoff, R. M. & Sorensen, A. G. (2001). Predicting tissue outcome in acute human cerebral ischemia using combined diffusion- and perfusion-weighted MR imaging. Stroke; a journal of cerebral circulation, 32(4), 933-42. https://doi.org/10.1161/01.STR.32.4.933
Lin, W., Celik, A., Derdeyn, C., An, H., Lee, Y., Videen, T., Østergaard, L. & Powers, W. J. (2001). Quantitative measurements of cerebral blood flow in patients with unilateral carotid artery occlusion: a PET and MR study. Journal of Magnetic Resonance Imaging, 14(6), 659-67. https://doi.org/10.1002/jmri.10021
Wirestam, R., Andersson, L., Østergaard, L., Bolling, M., Aunola, J., Lindgren, A., Geijer, B., Holtås, S. & Ståhlberg, F. (2000). Assessment of regional cerebral blood flow by dynamic susceptibility contrast MRI using different deconvolution techniques. Magnetic Resonance in Medicine, 43(5), 691-700. https://doi.org/10.1002/(SICI)1522-2594(200005)43:5<691::AID-MRM11>3.0.CO;2-B
Chabriat, H., Pappata, S., Østergaard, L., Clark, C. A., Pachot-Clouard, M., Vahedi, K., Jobert, A., Le Bihan, D. & Bousser, M. G. (2000). Cerebral hemodynamics in CADASIL before and after acetazolamide challenge assessed with MRI bolus tracking. Stroke, 31(8), 1904-12. https://doi.org/10.1161/01.STR.31.8.1904
Liu, Y., Karonen, J. O., Vanninen, R. L., Østergaard, L., Roivainen, R., Nuutinen, J., Perkiö, J. P., Könönen, M., Hämäläinen, A., Vanninen, E. J., Soimakallio, S., Kuikka, J. T. & Aronen, H. J. (2000). Cerebral Hemodynamics in Human Acute Ischemic Stroke: A Study with Diffusion- and Perfusion-Weighted Magnetic Resonance Imaging and SPECT. Journal of Cerebral Blood Flow and Metabolism, 20(6), 910-920. https://doi.org/10.1097/00004647-200006000-00003
Karonen, J. O., Liu, Y., Vanninen, R. L., Østergaard, L., Kaarina Partanen, P. L., Vainio, P. A., Vanninen, E. J., Nuutinen, J., Roivainen, R., Soimakallio, S., Kuikka, J. T. & Aronen, H. J. (2000). Combined perfusion- and diffusion-weighted MR imaging in acute ischemic stroke during the 1st week: a longitudinal study. Radiology, 217(3), 886-94. https://doi.org/10.1148/radiology.217.3.r00dc02886
Perkiö, J., Soinne, L., Østergaard, L., Tatlisumak, T., Kangsmäki, A., Helenius, J., Martinkauppi, S., Salonen, O., Savolainen, S., Kaste, M. & Aronen, H. J. (2000). Dynamic MR Bolus Tracking in Hyperacute Stroke: Comparison with Diffusion Weighted MR Imaging. In Proc. Intl. Soc. Mag. Reson. Med. 8 (pp. 450-450)
Benner, T., Tombach, B., Synnott, J. P., Schuierer, G., Reimer, P., Geens, V., Østergaard, L. & Sorensen, A. G. (2000). Human Cerebral Blood Flow Maps Improve with Higher Concentration of Contrast Agent. In ISMRM 8th Scientific Meeting & Exhibition - Proceedings
Li, T.-Q., Chen, Z. G., Østergaard, L., Hindmarsh, T. & Moseley, M. E. (2000). Quantification of Cerebral Blood Flow by Using Bolus Tracking and Artery Spin Tagging Methods. Magnetic Resonance Imaging, 18(5), 503-512. https://doi.org/10.1016/S0730-725X(00)00137-5
Lythgoe, D. J., Østergaard, L., William, S. C., Cluckie, A., Buxton-Thomas, M., Simmons, A. & Markus, H. S. (2000). Quantitative perfusion imaging in carotid artery stenosis using dynamic susceptibility contrast-enhanced magnetic resonance imaging. Magnetic Resonance Imaging, 18(1), 1-11. https://doi.org/10.1016/S0730-725X(99)00112-5
Markus, H. S., Lythgoe, D., Østergaard, L., O'Sullivan, M. & Williams, S. C. R. (2000). Reduced cerebral blood flow in white matter in ischaemic leukoaraiosis demonstrated using quantitative exogenous contrast based perfusion MRI. Journal of Neurology, Neurosurgery & Psychiatry, 69(1), 48-53. https://doi.org/10.1136/jnnp.69.1.48
Wirestam, R., Ryding, E., Lindgren, A., Geijer, B., Østergaard, L., Andersson, L., Holtås, S. & Ståhlberg, F. (2000). Regional cerebral blood flow distributions in normal volunteers: dynamic susceptibility contrast MRI compared with 99mTc-HMPAO SPECT. Journal of Computer Assisted Tomography, 24(4), 526-30.
Danielsen, E. H., Cumming, P., 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, O. L., Pedersen, E. B., Poulsen, P. H., Rodell, A. B. ... Møller, A. (2000). The DaNeX Study of Embryonic Mesencephalic Dopaminergic Tissue Grafted to a Minipig model of Parkinson's disease: Preliminary Findings of Effect of MPTP-Poisoning on Striatal Dopaminergic Markers. Cell Transplantation, 9(2), 247-259. https://doi.org/10.1177/096368970000900210
Zelaya, F., Flood, N., Chalk, J. B., Wang, D., Doddrell, D. M., Strugnell, W., Benson, M., Østergaard, L., Semple, J. & Eagle, S. (1999). An evaluation of the time dependence of the anisotropy of the water diffusion tensor in acute human ischemia. Magnetic Resonance Imaging, 17(3), 331-48. https://doi.org/10.1016/S0730-725X(98)00192-1
Karonen, J. O., Vanninen, R. L., Liu, Y., Østergaard, L., 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. (1999). Combined diffusion and perfusion MRI with correlation to single-photon emission CT in acute ischemic stroke. Ischemic penumbra predicts infarct growth. Stroke, 30(8), 1583-90. https://doi.org/10.1161/01.STR.30.8.1583
Østergaard, L., Hochberg, F. H., Rabinov, J. D., Sorensen, A. G., Lev, M., Kim, L., Weisskoff, R. M., Gonzalez, R. G., Gyldensted, C. & Rosen, B. R. (1999). 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. Journal of Neurosurgery, 90(2), 300-5.
Sorensen, A. G., Copen, W. A., Østergaard, L., Buonanno, F. S., Gonzalez, R. G., Rordorf, G., Rosen, B. R., Schwamm, L. H., Weisskoff, R. M. & Koroshetz, W. J. (1999). Hyperacute stroke: simultaneous measurement of relative cerebral blood volume, relative cerebral blood flow, and mean tissue transit time. Radiology, 210(2), 519-27. https://doi.org/10.1148/radiology.210.2.r99fe06519
Østergaard, L., Chesler, D. A., Weisskoff, R. M., Sorensen, A. G. & Rosen, B. R. (1999). Modeling cerebral blood flow and flow heterogeneity from magnetic resonance residue data. Journal of Cerebral Blood Flow and Metabolism, 19(6), 690-9. https://doi.org/10.1097/00004647-199906000-00013
Gjedde, A., Poulsen, P. H. & Østergaard, L. (1999). On the oxygenation of hemoglobin in the human brain. In A. Eke & D. T. Delpy (Eds.), Oxygen Transport to Tissue XXI (Vol. 471, pp. 67-81). Springer Publishing Company.
Sanchez del Rio, M., Bakker, D., Wu, O., Agosti, R., Mitsikostas, D. D., Østergaard, L., Wells, W. A., Rosen, B. R., Sorensen, G., Moskowitz, M. A. & Cutrer, F. M. (1999). Perfusion weighted imaging during migraine: spontaneous visual aura and headache. Cephalalgia, 19(8), 701-7.
Cutrer, F. M., Sorensen, A. G., Weisskoff, R. M., Østergaard, L., Sanchez del Rio, M., Lee, E. J., Rosen, B. R. & Moskowitz, M. A. (1998). Perfusion-weighted imaging defects during spontaneous migrainous aura. Annals of Neurology, 43(1), 25-31. https://doi.org/10.1002/ana.410430108
Sorensen, A. G., Tievsky, A. L., Østergaard, L., Weisskoff, R. M. & Rosen, B. R. (1997). Contrast agents in functional MR imaging. Journal of Magnetic Resonance Imaging, 7(1), 47-55.
Kwong, K. K., Chesler, D. A., Weisskoff, R. M., Donahue, K. M., Davis, T. L., Østergaard, L., Campbell, T. A. & Rosen, B. R. (1995). MR perfusion studies with T1-weighted echo planar imaging. Magnetic Resonance in Medicine, 34(6), 878-87. https://doi.org/Harvard-MIT Division of Health Sciences & Technology