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Auflistung nach Autor:in "Hahn, Horst"

1 - 3 von 3
  • muc: kurzbeitrag (poster)
    Enhancing Medical Needle Placement with Auditory Display
    (Mensch & Computer 2013: Interaktive Vielfalt, 2013) Black, David; Al Issawi, Jumana; Rieder, Christian; Hahn, Horst
    Radiofrequency ablation is a minimally invasive procedure used to treat a tumor by applying local radiofrequency energy using a needle that is inserted into the patient through the skin. Current methods for guiding needle placement require the radiologist to remove the view from the patient and instead use a computer screen for guidance. We present two auditory display methods to guide needle placement that allow visual attention to remain on the patient. Initial results indicate that the needle placement task can be accomplished using almost solely auditory support, increasing user attention on the patient and reducing head and neck movements.
  • Konferenzbeitrag
    Real-time breast deformation using non-linear tissue properties
    (INFORMATIK 2011 – Informatik schafft Communities, 2011) Harz, Markus; Georgii, Joachim; Schilling, Kathy; Hahn, Horst
    Localization of target structures in open surgical breast procedures mostly rely on localization wires that give coarse orientation hints together with a set of radiological images to convey the extent and location. Patient positioning, however, is different for image acquisition and surgery. We propose to simulate the breast deformation between these positions to track and visualize the target position. To date no sufficiently fast and accurate methods have been proposed for that purpose, which is caused by the computational expensiveness caused by the non-linear behavior of the material. In contrast, the FEM-based simulation framework employed in our work allows for an online update of material attributes, in particular the per-element elastic modulus, which affects the reaction to forces. Fast breast deformation simulation is thereby for the first time amenable to improve accuracy and confidence of breast surgeons compared to the de-facto standard techniques for localization of target structures.
  • Konferenzbeitrag
    Softwareassistenten – Computerunterstützung für die medizinische Diagnostik und Therapieplanung
    (Informatik 2009 – Im Focus das Leben, 2009) Hahn, Horst; Harz, Markus; Klein, Jan; Peitgen, Hein-Otto