Virtuelle Realität in der Medizin

Müller‐Wittig, Wolfgang

doi:10.1007/978-3-540-34103-1_48

Cited by 2 publications

(1 citation statement)

References 20 publications

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“…It is well known, that a good surgeon needs a continuous training to perform such operations reliable in a top quality. To reduce the high costs and to overcome the tight ethical restrictions of animal based education and training an increasing development and application of virtual surgery simulators can be observed [4]. One of the main issues of surgery simulators is to ensure simultaneously the real time performance of the device, the high-level image representation and an acceptable force-feedback behavior.…”

Section: Introductionmentioning

confidence: 99%

Real‐time FEM for the Virtual Surgery of Soft Tissues

Willberg

Gabbert

Berger

2009

Proc Appl Math and Mech

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The virtual surgery of soft tissues, such as the virtual laparoscopy, requires realistic 3D models of all the inner organs belonging to the virtual scenario, which in connection with fast numerical algorithms have to assure the real-time performance of the simulation. The simulation has to take into account the interaction of the surgical instruments with the organs, the contact behavior between the organs including self contact as well as cutting, stitching, bleeding, coagulation etc. Recently, different approaches have been published to achieve a real time performance with sufficient accuracy. In the paper a finite element approach is presented, which includes the geometrical and physical nonlinear dynamic behavior of the organs during the surgery as well as the required contact conditions between the organs and the organs with surgical instruments. Some simplifications of the standard procedure (contact search, updating rate, etc.) to increase the computational speed as well as the beneficial behavior of an implicit time integration scheme resulting in larger time steps are discussed. In the paper some examples are presented to demonstrate the performance and the accuracy of the approach.

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Section: Introductionmentioning

confidence: 99%

Real‐time FEM for the Virtual Surgery of Soft Tissues

Willberg

Gabbert

Berger

2009

Proc Appl Math and Mech

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Real-Time FEM of Soft Tissues for Virtual Surgery

Willberg

Berger

Gabbert

2009

ASME 2009 Summer Bioengineering Conference, Parts a and B

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Endoscopic techniques require small perforation holes only as entries for optical and surgical instruments; such enabling the treatment of injuries with a minimized damage of the surrounding health tissue. But the surgeon has to operate in a 3D domain by looking at a distorted 2D image at the screen. It is well known, that a good surgeon needs a continuous training to perform such operations reliable in a top quality. To overcome the high costs and tight ethical restrictions of animal based education and training has result in an increasing development and application of virtual surgery simulators [1]. One of the main issues of surgery simulators is to ensure simultaneously the real time performance of the device, the high-level image representation and an acceptable force-feedback behavior. The basics of such simulators are mathematical models of the involved soft tissues, which have to perform in a realistic physical manner, with dynamic nonlinear large deformations, including the interaction of the different constituents (instrument/organ, organ/organ, organ by itself, cutting, bleeding etc). In the paper the focus is on realistic organ models and the realization of a fast contact search and reaction algorithm.

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Virtuelle Realität in der Medizin

Cited by 2 publications

References 20 publications

Real‐time FEM for the Virtual Surgery of Soft Tissues

Real‐time FEM for the Virtual Surgery of Soft Tissues

Real-Time FEM of Soft Tissues for Virtual Surgery

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