@incollection{MuellerVeggianKopsQuinetal.2007,
  author    = {M{\"u}ller-Veggian, Mattea and Kops, Elena Rota and Quin, Peng and Herzog, Hans},
  title     = {MRI Based Attenuation Correction for Brain PET Images},
  series = {Advances in medical engineering / [3rd RPT - Remagener Physiktage together with the Second Scientific Workshop of Medical Robotics, Navigation and Visualization ... Remagen ... 7.-9. M{\"a}rz 2007]. Thorsten M. Buzug (ed.) Part 1.},
  booktitle = {Advances in medical engineering / [3rd RPT - Remagener Physiktage together with the Second Scientific Workshop of Medical Robotics, Navigation and Visualization ... Remagen ... 7.-9. M{\"a}rz 2007]. Thorsten M. Buzug (ed.) Part 1.},
  publisher = {Springer},
  address   = {Berlin},
  isbn      = {978-3-540-68763-4},
  doi       = {10.1007/978-3-540-68764-1_15},
  pages     = {93 -- 97},
  year      = {2007},
  abstract  = {This work describes a procedure to yield attenuation maps from MR images which are used for the absorption correction (AC) of brain PET data. Such an approach could be mandatory for future combined PET and MRI scanners, which probably do not include a transmission facility. T1-weighted MR images were segmented into brain tissue, bone, soft tissue, and sinus; attenuation coefficients corresponding to elemental composition and density as well as to 511 keV photon energy were respectively assigned. Attenuation maps containing up to four compartments were created and forward projected into sinograms with attenuation factors which then were used for AC during reconstruction of FDG-PET data. The commonly used AC based on a radioactive (68Ge) transmission scan served as reference. The reconstructed radioactivity values obtained with the MRI-based AC were about 20\% lower than those obtained with PET-based AC if the skull was not taken into account. Considering the skull the difference was still about 10\%. Our investigations demonstrate the feasibility of a MRI-based AC, but revealed also the necessity of a satisfying delineation of bone thickness which tends to be underestimated in our first approach of T1-weighted MR image segmentation.},
  language  = {en}
}
@incollection{Schermutzki2007,
  author    = {Schermutzki, Margret},
  title     = {Lernergebnisse - Begriffe, Zusammenh{\"a}nge, Umsetzung und Erfolgsermittlung : Lernergebnisse und Kompetenzvermittlung als elementare Orientierungen des Bologna-Prozesses},
  publisher = {FH Aachen},
  publisher      = {Fachhochschule Aachen},
  year      = {2007},
  abstract  = {zuerst erschienen In: Handbuch Qualit{\"a}t in Studium und Lehre : Evaluation nutzen, Akkreditierung sichern, Profil sch{\"a}rfen / Hrsg.: Winfried Benz .... Berlin: Raabe ISBN 978-3-8183-0207-8 ; 3-8183-0207-3 , Kapitel E.3.3 S. 1-30 Sonderdruck unter dem Titel: Schermutzki, Lernergebnisse - Begriffe, Zusammenh{\"a}nge, Umsetzung und Erfolgsermittlung. Fachhochschule Aachen, 2007. 39 S.: graph. Darst. Der Beitrag beschreibt die Bedeutung und Notwendigkeit der Verwendung von Lernergebnissen als gemeinsame Sprache zwischen den verschiedenen Hochschulen und zwischen Hochschule und beruflicher Bildung, um zu einem feststellenden Validit{\"a}tsurteil und zu funktionst{\"u}chtigen Anerkennungsmechanismen zu kommen. Hierbei kommt der ergebnisorientierten Beschreibung der Studieng{\"a}nge und Module durch die Hochschulen große Bedeutung zu. Der Beitrag beschreibt die diesbez{\"u}glichen Grundlagen und schl{\"a}gt Methoden vor, die bei der praktischen Beschreibung, der Wahl der Lehr- und Lernformen und Pr{\"u}fungsformen von Studieng{\"a}ngen und Modulen angewendet werden k{\"o}nnen.},
  subject      = {Bologna-Prozess},
  language  = {de}
}