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Bharti Temkin Ph.D., Dept.
of Computer Science, Texas Tech University “Haptic Texture Generation – A Heuristic Method For
Virtual Body Structures” We
address the question developing a library of three-dimensional Haptic
Anatomical Structures (3D-HAS) by integration of haptics with Virtual
Body Structures (VBS). Such a library would provide a stepping-stone
to integrate haptics for future surgical training simulations. A number
of difficulties must be overcome in order to create a realistic sense
of touch. One of the problems is that the data of in-vivo tissue compliance
properties needed to generate credible output forces does not exist.
Once consistent understandable data exists, we will still be faced with
the issue of developing force feedback models that can be applied in
surgical simulations. Without this “haptic texture”, the sense of touch
component will remains relatively primitive and unrealistic. In this
presentation, we describe a system that generates Virtual Body Structures
using Visible Human segmented data and adds haptic texture, thus creating
3D-Haptic Anatomical Structures. The system integrates an algorithm
for the generation of VBS with a Graphics-to-Haptic (G2H)
tool that makes arbitrary 3D objects haptic without any additional programming.
A method of creating, modifying, and applying heuristic texture data
will also be described. The system makes it possible, for an expert
in the field of anatomy or surgery, to generate a haptic texture appropriate
to a given anatomical structure. Once generated, the haptic texture
can be saved as a part of a heuristic database of tissue properties.
The goal of this work is to create a library of 3D structures with haptic
textures that can be used as canonical models for the development of
surgical simulations. |