Ulf R Jensen-Kondering

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BACKGROUND AND PURPOSE We hypothesize that in acute middle cerebral artery stroke, thrombus lengths measured in thin-slice nonenhanced CT images define a limit beyond which systemic thrombolysis will fail to recanalize occluded arteries. METHODS In 138 patients who presented with acute middle cerebral artery stroke and who were treated with intravenous(More)
PURPOSE To evaluate the utility of a novel non-contrast enhanced, vessel-selective magnetic resonance angiography (MRA) approach based on superselective pseudo-continuous arterial spin labeling (ASL) for the morphologic assessment of intracranial arteries when compared to a clinically used time-of-flight (TOF) MRA. MATERIALS AND METHODS Three sets of(More)
AIM To review the literature on the assessment of venous vessels to estimate the penumbra on T2*w imaging and susceptibility-weighted imaging (SWI). METHODS Literature that reported on the assessment of penumbra by T2*w imaging or SWI and used a validation method was included. PubMed and relevant stroke and magnetic resonance imaging (MRI) related(More)
Functional MRI (fMRI) is routinely used to depict language areas, for example in the preoperative diagnostic work-up of patients with a brain tumour. The objective of this study was to test whether semantic decision making can activate the temporo-parietal language areas better than phonological generation stimuli. Five fMRI language stimuli were tested in(More)
OBJECTIVES It is well known that cerebral cavernous malformations (CCMs) present with variable degrees of contrast enhancement on routine magnetic resonance imaging (MRI) studies. This is attributed to the presence of a low flow vascular architecture in these lesions. The aim of this preliminary study was to determine whether an additional reason for the(More)
M apping the ischemic penumbra (ie, the neurophysio-logically silent but still viable ischemic tissue) is increasingly part of routine assessment in suspected acute stroke, although whether this approach is cost-effective is still unclear. 1,2 The penumbra is characterized by both low cerebral blood flow (CBF; Ͻ20 mL ⅐ 100 g Ϫ1 ⅐ min Ϫ1) and elevated oxygen(More)
PURPOSE Spontaneous dissection of the internal carotid artery (CAD) is an increasingly recognized cause for stroke especially in young and middle-aged patients. We hypothesized that non-enhanced cranial computed tomography (NECCT) can visualize the subpetrous carotid wall hematoma and thus enable identification of patients with CAD. MATERIALS AND METHODS(More)
Mapping the ischaemic penumbra in acute stroke is of considerable clinical interest. For this purpose, mapping tissue hypoxia with 18F-misonidazole (FMISO) PET is attractive, and is straightforward compared to 15O PET. Given the current emphasis on penumbra imaging using diffusion/perfusion MR or CT perfusion, investigating the relationships between FMISO(More)
Despite the advent and growing availability of magnetic resonance imaging, the imaging modality of choice in the acute care of stroke patients in many institutions remains computed tomography. The hyperdense artery sign is the earliest marker of acute ischemic stroke. In this short review, we discuss the pathology, incidence, clinical aspects, imaging(More)
Angiographic imaging is an important diagnostic tool for the assessment of the intracranial arterial status. Using arterial spin labeling (ASL) techniques, it is possible to visualize the arteries without the administration of exogenous contrast agents. Moreover, modifications of the labeling method allow for the visualization of single arterial trees. In(More)