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PURPOSE To investigate the ability of diffusion-tensor imaging (DTI) and T2 to help detect the mildest nerve lesion conceivable, that is, subclinical ulnar neuropathy at the elbow. MATERIALS AND METHODS This prospective study was approved by the institutional ethics board. Written informed consent was obtained from all participants. Magnetic resonance(More)
OBJECTIVE The aim of this study was to determine whether quantitative diffusion tensor imaging (DTI) adds diagnostic accuracy in magnetic resonance neurography. MATERIALS AND METHODS This prospective study was approved by the institutional review board. We enrolled 16 patients with peripheral polyneuropathy of various etiologies involving the upper arm(More)
The preferred structural pattern of antiparallel beta-barrels in proteins, described as the right-handed tilting of the peptide strands with respect to the axis of the barrel, is accounted for in terms of intra- and interchain interaction energies. It is related to the preference of beta-sheets for right-handed twisting. Conformational energy computations(More)
A land surface broadband albedo map of the entire Earth's land surface (snow and snow-free) is required for use in Global Climate Model initialisation and verification. A group of 10 users have been selected to work with the GlobAlbedo* Implementation team to define requirements and drive the project towards practical applications of the product. These(More)
A network of ground-based UV/visible DOAS instruments operated by the University of Bremen is used to validate total column measurements from the SCIAMACHY instrument on ENVISAT from the tropics to the Arctic. Measurement quantities include vertical columns of O 3 , NO 2 , and BrO. Depending on atmospheric conditions, also slant columns of OClO (during(More)
Producing a global and comprehensive description of atmospheric aerosols requires integration of ground-based, airborne, satellite and model datasets. Due to its complexity, aerosol monitoring requires the use of several data records with complementary information content. This paper describes the lessons learned while developing and qualifying algorithms(More)
The MERIS and AATSR instruments onboard ENVISAT provide similar resolution and swath but complementary information, encompassing different spectral domains and viewing geometries. We present research on synergistic use of MERIS and AATSR imagery, with objectives (i) to define and evaluate algorithms for improved cloud screening, global aerosol retrieval and(More)
The Medium Resolution Imaging Spectrometer MERIS and the Advanced Along-Track Scanning Radiometer AATSR instruments, both onboard ESA's Environmental Satellite ENVISAT, provide similar spatial resolution and swath but complementary information, encompassing different spectral domains and viewing geometries. Recent geophysical algorithms do not take(More)