Abstract
In neurosurgery, opening a brain fissure allows an operator to access to the basis cranii and to treat a disease part safely, but the operator is required highly sophisticated techniques. In order to develop a neurosurgery simulator enabling surgeons to train themselves for opening a brain fissure procedure, it is required to detect collision between a thin instrument model and a deformable brain model and furthermore to compute feasible enforced displacements to deformable object. This paper proposes a new collision detection method which considers to the collision state of objects in previous loop of simulation. And simulation of opening a brain fissure is implemented using the proposed method which is accelerated by GPU (Graphics Processing Unit). Finally the performance of the proposed method is evaluated.
Highlights
Neurosurgery simulator In recent years, due to the improvement of safety awareness and significant advances in medical technology, doctors have to spend more time in training themselves to learn up-to-date surgical techniques
Surgical simulators based on Virtual Reality (VR) technology and haptic display offer high quality and cost-effective training
When intersection test is performed by Graphics Processing Unit (GPU), Central Processing Unit (CPU) sends the data sets of position of source nodes and all surface triangles to GPU by each side of the spatula
Summary
Neurosurgery simulator In recent years, due to the improvement of safety awareness and significant advances in medical technology, doctors have to spend more time in training themselves to learn up-to-date surgical techniques. To develop a simulator with which operators can learn how to open a brain fissure, it is required to detect collision between a non-convex deformable object and a thin rigid object and to give suitable enforced displacements for the deformable object. When a thin object penetrates a deformable object deeply, enforced displacements computed by a collision detection algorithm, based on only geometric relationship between colliding objects,. Other volume-based methods detect collision by intersection between internal meshes of objects [11,14]. In this method, depth of penetration between objects is calculated and used for displacement for intersected objects. This paper proposes a DCD method realizing suitable deformation for opening a brain fissure
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