Leif Østergaard

Author PubWeight™ 51.07‹?›

Top papers

Rank Title Journal Year PubWeight™‹?›
1 Tracer arrival timing-insensitive technique for estimating flow in MR perfusion-weighted imaging using singular value decomposition with a block-circulant deconvolution matrix. Magn Reson Med 2003 3.44
2 How reliable is perfusion MR in acute stroke? Validation and determination of the penumbra threshold against quantitative PET. Stroke 2008 2.09
3 The roles of cerebral blood flow, capillary transit time heterogeneity, and oxygen tension in brain oxygenation and metabolism. J Cereb Blood Flow Metab 2011 1.76
4 Modeling dendrite density from magnetic resonance diffusion measurements. Neuroimage 2006 1.74
5 Neurite density from magnetic resonance diffusion measurements at ultrahigh field: comparison with light microscopy and electron microscopy. Neuroimage 2009 1.39
6 Comparison of 10 perfusion MRI parameters in 97 sub-6-hour stroke patients using voxel-based receiver operating characteristics analysis. Stroke 2009 1.38
7 To musicians, the message is in the meter pre-attentive neuronal responses to incongruent rhythm are left-lateralized in musicians. Neuroimage 2005 1.30
8 MRI detection of early blood-brain barrier disruption: parenchymal enhancement predicts focal hemorrhagic transformation after thrombolysis. Stroke 2008 1.30
9 Bayesian estimation of cerebral perfusion using a physiological model of microvasculature. Neuroimage 2006 1.29
10 A multicenter, randomized, double-blind, placebo-controlled trial to test efficacy and safety of magnetic resonance imaging-based thrombolysis in wake-up stroke (WAKE-UP). Int J Stroke 2013 1.29
11 Cerebral blood flow, blood volume, and oxygen metabolism dynamics in human visual and motor cortex as measured by whole-brain multi-modal magnetic resonance imaging. J Cereb Blood Flow Metab 2009 1.29
12 Assessment of ischemic penumbra in patients with hyperacute stroke using amide proton transfer (APT) chemical exchange saturation transfer (CEST) MRI. NMR Biomed 2013 1.23
13 Magnetic resonance perfusion-weighted imaging of acute cerebral infarction: effect of the calculation methods and underlying vasculopathy. Stroke 2002 1.23
14 Ischemic injury detected by diffusion imaging 11 minutes after stroke. Ann Neurol 2005 1.21
15 Characterizing physiological heterogeneity of infarction risk in acute human ischaemic stroke using MRI. Brain 2006 1.20
16 Remote ischemic perconditioning as an adjunct therapy to thrombolysis in patients with acute ischemic stroke: a randomized trial. Stroke 2013 1.19
17 Effects of tracer arrival time on flow estimates in MR perfusion-weighted imaging. Magn Reson Med 2003 1.18
18 Evaluation of four postprocessing methods for determination of cerebral blood volume and mean transit time by dynamic susceptibility contrast imaging. Magn Reson Med 2002 1.13
19 Accuracy and reliability assessment of CT and MR perfusion analysis software using a digital phantom. Radiology 2012 1.11
20 Applying instance-based techniques to prediction of final outcome in acute stroke. Artif Intell Med 2005 1.03
21 Analysis of partial volume effects on arterial input functions using gradient echo: a simulation study. Magn Reson Med 2009 0.94
22 Radiation administered as a large single dose or in a fractionated schedule: Role of the tumour vasculature as a target for influencing response. Acta Oncol 2006 0.94
23 Effect of hypnotic pain modulation on brain activity in patients with temporomandibular disorder pain. Pain 2010 0.92
24 Accessing the mental space-Spatial working memory processes for language and vision overlap in precuneus. Hum Brain Mapp 2008 0.91
25 Visualization of altered neurovascular coupling in chronic stroke patients using multimodal functional MRI. J Cereb Blood Flow Metab 2012 0.89
26 Susceptibility of Tmax to tracer delay on perfusion analysis: quantitative evaluation of various deconvolution algorithms using digital phantoms. J Cereb Blood Flow Metab 2010 0.88
27 Combretastatin A-4 phosphate affects tumor vessel volume and size distribution as assessed using MRI-based vessel size imaging. Clin Cancer Res 2012 0.88
28 Elevated T2-values in MRI of stroke patients shortly after symptom onset do not predict irreversible tissue infarction. Brain 2012 0.87
29 Final infarct size after acute stroke: prediction with flow heterogeneity. Radiology 2002 0.86
30 Accumulation of magnetic iron oxide nanoparticles coated with variably sized polyethylene glycol in murine tumors. Nanoscale 2012 0.86
31 Cerebral blood flow, blood volume, and mean transit time responses to propofol and indomethacin in peritumor and contralateral brain regions: perioperative perfusion-weighted magnetic resonance imaging in patients with brain tumors. Anesthesiology 2010 0.86
32 Superior analgesic effect of an active distraction versus pleasant unfamiliar sounds and music: the influence of emotion and cognitive style. PLoS One 2012 0.85
33 Predicting tissue outcome from acute stroke magnetic resonance imaging: improving model performance by optimal sampling of training data. Stroke 2009 0.84
34 Cortical volumes and atrophy rates in FTD-3 CHMP2B mutation carriers and related non-carriers. Neuroimage 2008 0.84
35 Very low cerebral blood volume predicts parenchymal hematoma in acute ischemic stroke. Stroke 2013 0.84
36 Total mismatch: negative diffusion-weighted imaging but extensive perfusion defect in acute stroke. Stroke 2009 0.83
37 CT and MR perfusion can discriminate severe cerebral hypoperfusion from perfusion absence: evaluation of different commercial software packages by using digital phantoms. Neuroradiology 2011 0.83
38 Recurrent activity in higher order, modality non-specific brain regions: a Granger causality analysis of autobiographic memory retrieval. PLoS One 2011 0.80
39 Segmentation of dynamic contrast enhanced magnetic resonance imaging data. Acta Oncol 2008 0.80
40 Statistical mapping of effects of middle cerebral artery occlusion (MCAO) on blood flow and oxygen consumption in porcine brain. J Neurosci Methods 2006 0.80
41 Making sense: Dopamine activates conscious self-monitoring through medial prefrontal cortex. Hum Brain Mapp 2015 0.80
42 Acute stroke: automatic perfusion lesion outlining using level sets. Radiology 2013 0.79
43 Biased visualization of hypoperfused tissue by computed tomography due to short imaging duration: improved classification by image down-sampling and vascular models. Eur Radiol 2015 0.79
44 The impact of susceptibility gradients on cartesian and spiral EPI for BOLD fMRI. MAGMA 2006 0.78
45 Assessment of baseline hemodynamic parameters within infarct progression areas in acute stroke patients using perfusion-weighted MRI. Neuroradiology 2010 0.77
46 Abnormal intravoxel cerebral blood flow heterogeneity in human ischemic stroke determined by dynamic susceptibility contrast magnetic resonance imaging. Stroke 2004 0.77
47 Safety and efficacy of MRI-based selection for recombinant tissue plasminogen activator treatment: responder analysis of outcome in the 3-hour time window. Cerebrovasc Dis 2009 0.76
48 Letter to the Editor: A rejoinder to Grool et al. (2010). Psychol Med 2010 0.75
49 [Thrombolysis of apoplexy patients. A year's experience and results in Aarhus Hospital]. Ugeskr Laeger 2006 0.75
50 MRI Assessment of Ischemic Lesion Evolution within White and Gray Matter. Cerebrovasc Dis 2016 0.75
51 Correlations between Stroop task performance and white matter lesion measures in late-onset major depression. Psychiatry Res 2012 0.75
52 [Picture of the month: FLAIR]. Ugeskr Laeger 2006 0.75
53 [Imaging of the pathophysiology in acute stroke]. Ugeskr Laeger 2007 0.75
54 Upgraded acute stroke care including thrombolysis is associated with reduced length of hospital stay among non-stroke patients. Cerebrovasc Dis 2008 0.75
55 Time evolution of cerebral perfusion and apparent diffusion coefficient measured by magnetic resonance imaging in a porcine stroke model. J Magn Reson Imaging 2002 0.75
56 Do indomethacin and propofol cause cerebral ischemic damage? Diffusion-weighted magnetic resonance imaging in patients undergoing craniotomy for brain tumors. Anesthesiology 2004 0.75