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Biomedical subjects

D P Pretschner

Publications and source records attributed to D P Pretschner.

25 records · Page 2Linked to original sources
PubMed1980

Nuclear medicine in Europe. Considerations of present status and future trends.

A general view of nuclear medicine's present status and future trends in Europe is given. Nclear medicine procedures, radiopharmaceuticals, annual examinations, equipment, quality assurance, management, and number of installations of gamma cameras, and computer systems in Europe are considered. Market trends are given. The role of nuclear medicine computer systems, hardware and software, is discussed. The situation of nuclear medicine in Europe, especially in the Federal Republic of Germany (FRG) with regard to economic and medical factors, is investigated.

Computers↗
PubMedDate not supplied

Elastodynamic shape modeler: a tool for defining the deformation behavior of virtual tissues.

A main goal of surgical simulators is the creation of virtual training environments for prospective surgeons. Thus, students can rehearse the various steps of surgical procedures on a computer system without any risk to the patient. One main condition for realistic training is the simulated interaction with virtual medical devices, such as endoscopic instruments. In particular, the virtual deformation and transection of tissues are important. For this application, a neuro-fuzzy model has been developed, which allows the description of the visual and haptic deformation behavior of the simulated tissue by means of expert knowledge in the form of medical terms. Pathologic conditions affecting the visual and haptic tissue response can be easily changed by a medical specialist without mathematical knowledge. By using the personal computer-based program Elastodynamic Shape Modeler, these conditions can be adjusted via a graphical user interface. With a force feedback device, which is similar to a real laparoscopic instrument, virtual deformations can be performed and the resulting haptic feedback can be felt. Thus, use of neuro-fuzzy technologies for the definition and calculation of virtual deformations seems applicable to the simulation of surgical interventions in virtual environments.

Computer Graphics↗