Jens Georg Schmidt

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Malformations of the midface can be treated by distraction osteogenesis, i.e. cutting bones and pulling them into the right position. We present a computational toolchain helping to predict the effects of the surgery on the soft tissue displacement. An initial raw CT image is segmented and transformed into a geometric head model, which is used for virtual(More)
GEMSS is a European project that aims at providing high performance medical simulation services in a distributed and grid computing environment. The GEMSS grid middleware is designed using web services technologies and standards and provides support for authorization, workflow, security, Quality of Service aspects. In this work, one of the GEMSS(More)
The European GEMSS Project 1 is concerned with the creation of medical Grid service prototypes and their evaluation in a secure service-oriented infrastructure for distributed on-demand super-computing-the GEMSS test-bed. The medical prototype applications include maxillo-facial surgery simulation, neuro-surgery support, radio-surgery planning, inhaled(More)
The first part of this paper presents a selection of medical simulation applications, including image reconstruction, near real-time registration for neuro-surgery, enhanced dose distribution calculation for radio-therapy, inhaled drug delivery prediction, plastic surgery planning and cardio-vascular system simulation. The latter two topics are discussed in(More)
Cerebral aneurysms are a multi-factorial disease with severe consequences. A core part of the European project @neurIST was the physical characterization of aneurysms to find candidate risk factors associated with aneurysm rupture. The project investigated measures based on morphological, haemodynamic and aneurysm wall structure analyses for more than 300(More)
The first part of this presentation is devoted to the problem of determining the precise time of onset of retinitis pigmentosa (RP). For the purpose of this discussion we will stay with the definition of the beginning of RP as that date on which the decrease in dark adaptation is first noticed, rather than visual field loss, which is subject to even greater(More)
In the reconstruction of complex craniofacial malfor-mations CAD-CAM procedures could help generating alloplastic implants to achieve almost optimal esthetic results. Complementary to the existing CAD-CAM techniques in the cranial vault region or modeling procedures in unilateral defects, these techniques are introduced to bilaterally affected skulls in(More)
UNLABELLED The electroretinogram (ERG) was recorded 20 times over a period of 360 days in 26 albino-rats with implanted intravitreal iron wires ranging in size between 0.15 and 1.2 mm2. RESULTS (i) The a- and b-wave amplitudes decreased rapidly within one day after iron wire implantation. During the following week the amplitudes recovered to some extent.(More)
The electroretinograms of 20 anesthetised but spontaneously breathing rats (Wistar) were recorded over a period of 60 minutes. Two anesthetical procedures were applied to each of these rats respectively: (I) halothane/nitrous oxide/oxygen (2% halothane in 0.81 N2O: 0.41 O2/min) and (II) halothane/nitrogen/oxygen (2% halothane in 0.81 N2: 0.41 O2/min). From(More)