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PubMedDate not supplied

Intuitive actions.

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Decision Making↗
PubMed2004

An AR system with intuitive user interface for manipulation and visualization of 3D medical data.

We report on a stereoscopic video-see-through augmented reality system which we developed for medical applications. Our system allows interactive in-situ visualization of 3D medical imaging data. For high-quality rendering of the augmented scene we utilize the capabilities of the latest graphics card generations. Fast high-precision MPR generation ("multiplanar reconstruction") and volume rendering is realized with OpenGL 3D textures. We provide a tracked hand-held tool to interact with the medical imaging data in its actual location. This tool is represented as a virtual tool in the space of the medical data. The user can assign different functionality to it: select arbitrary MPR cross-sections, guide a local volume rendered cube through the medical data, change the transfer function, etc. Tracking works in conjunction with retroreflective markers, which frame the workspace for head tracking respectively are attached to instruments for tool tracking. We use a single head-mounted tracking camera, which is rigidly fixed to the stereo pair of cameras that provide the live video view of the real scene. The user's spatial perception is based on stereo depth cues as well as on the kinetic depth cues that he receives with the viewpoint variations and the interactive data visualization. The AR system has a compelling real-time performance with 30 stereo-frames/second and exhibits no time lag between the video images and the augmenting graphics. Thus, the physician can interactively explore the medical imaging information in-situ.

Diagnostic Imaging↗
PubMed2004

[Historical insights into tuberculosis. Girolamo Fracastoro's intuition on the transmission of tuberculosis and his opponents. History of an idea].

The author presents the ideas of Girolamo Fracastoro, an Italian scientist from Verona, who postulated in 1546 that tuberculosis was caused by "seminaria contagionum", which were invisible but somehow living and transmissible, that harboured a fondness for those who were constitutionally receptive. This was followed by a major discussion, but the official scientific world did not understand the real importance of the revolutionary idea. Nevertheless, during the 17th and 18th centuries in Italy, but also in France and Spain, the first measures to reduce the spread of tubercular disease were adopted. These public health measures were extended with some difficulty, but were mostly abandoned at the end of 18th century, before the beginning and the development of microbiology as a science. The author presents the more successful guidelines against tuberculosis proposed at that time.

History, 16th Century↗
PubMed2005

"Counter" intuitive.

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Administration, Topical↗