Haptic Rendering of Volumetric Anatomic Models at Subvoxel Resolution
نویسندگان
چکیده
In this paper, a new approach for haptic rendering of high resolution voxel-based anatomic models is presented. For visualization the surface location is determined by a ray-casting algorithm at sub-voxel resolution. Since the same algorithm is used for the haptics as well, a very high level of detail is achieved for haptic feedback. Both graphical and haptic representation is congruent. The interaction forces are calculated based on a collision detection between an arbitrary sized sphere-shaped tool and an arbitrary complex anatomic model. Forces are calculated at an update rate of 6000 Hz and sent to a 3Degree-of-Freedom (3-DOF) Phantom device [7]. Compared to point-based haptic rendering, the unique combination of the sphere-based approach in combination with sub-voxel rendering provides more realistic and very detailed tactile sensations.
منابع مشابه
Realistic haptic volume interaction for petrous bone surgery simulation
In this paper, a new approach for haptic volume interaction with high resolution voxelbased anatomic models is presented. The haptic rendering is based on a multi-point collision detection approach which provides realistic tool interaction with the models. Both haptics and graphics are rendered at sub-voxel resolution, which leads to a high level of detail and enables the exploration of the mod...
متن کاملSimulating Surgery using Volumetric Object Representations, Real- Time Volume Rendering and Haptic Feedback
Surgical simulation has many applications in education and training, surgical planning, and intra-operative assistance. However, extending current surface-based computer graphics methods to model phenomena such as the deformation, cutting, tearing, or repairing of soft tissues pose significant challenges for real-time interactions. In this paper, the use of volumetric methods for modeling compl...
متن کاملReal-time haptic rendering of a high-resolution volumetric deformable object in a collaborative virtual environment
A collaborative virtual environment (CVE) is a shared environment that allows geographically separated users to watch and manipulate the same object at the same time. This paper presents a fast haptic rendering method when users interact with a virtual object at multiple points or multiple areas in a CVE. Previously, we proposed a new model (Shape-retaining Chain Linked Model) for real-time vol...
متن کاملCatheter insertion simulation with co-registered direct volume rendering and haptic feedback.
We have developed an experimental catheter insertion simulation system supporting head-tracked stereoscopic viewing of volumetric anatomic reconstructions registered with direct haptic 3D interaction. The system takes as input data acquired with standard medical imaging modalities and regards it as a visual and haptic environment whose parameters are interactively defined using look-up tables. ...
متن کاملA a Novel Haptic Rendering Technique Using a Hybrid Surface Representation Addresses Conventional Limitations in Haptic Displays. a Haptic-rendering Technique Based on Hybrid Surface Representation 66
explore, paint, and manipulate virtual 3D models in a natural way using a haptic display device. A haptic rendering algorithm must generate a force field to simulate the presence of these virtual objects and their surface properties (such as friction and texture), or to guide the user along a specific trajectory. We can roughly classify haptic rendering algorithms according to the surface repre...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2001