Elena Steffensen

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As part of the DaNeX study, the uptake and binding of several positron emitting tracers was recorded in brain of healthy Göttingen minipigs, in minipigs with a syndrome of parkinsonism due to MPTP intoxication, and in parkinsonian minipigs which had received intrastriatal grafts of mesencephalic neurons from fetal pigs. The specific binding of [11C]NS 2214(More)
BACKGROUND Perfusion magnetic resonance imaging (MRI) is increasingly used in the evaluation of brain tumors. Relative cerebral blood volume (rCBV) is usually obtained by dynamic susceptibility contrast (DSC) MRI using normal appearing white matter as reference region. The emerging perfusion technique arterial spin labelling (ASL) presently provides(More)
The aim of this study was to use magnetic resonance imaging (MRI) to evaluate the three-dimensional geometry and mechanosensory properties of the sigmoid colon. The sigmoid colon was stepwise distended by a water-filled bag in eight subjects. Simultaneous MRI, bag pressure recording and sensory assessment were performed before and after smooth muscle(More)
A method to evaluate the three-dimensional (3-D) geometry of the human gastrointestinal wall may be valuable for understanding tissue biomechanics, mechano-sensation and function. In this paper we present a magnetic resonance imaging (MRI) based method to determine rectal geometry and validation of data obtained in three volunteers. A specially designed(More)
OBJECTIVE There may be advantages in using magnetic resonance imaging (MRI) in small-bowel disease. The aims of this study were to optimize the MRI examination technique and to evaluate the capabilities of MRI compared with those of conventional enteroclysis (CE). MATERIALS AND METHODS MRI and CE were performed in 36 patients suspected of Crohn's disease.(More)