Cut and Suture Support on Volumetric Models in the CyberMed Framework

Cunha, Ícaro Lins Leitão da; Xia, Pingping; Machado, Liliane S.; Restivo, Maria Teresa; Moraes, Ronei Marcos de; Lopes, António M.

doi:10.1016/j.protcy.2012.09.085

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…The features provided by CyberMed include: monoscopic and stereoscopic visualization; support to common VR devices, such as haptic devices, motion trackers, head-mounted display and data gloves; different algorithms for collision / deformation of virtual objects; an AI module for users assessment [27]; collaboration and network communication, visual programming interface [28], amongst others. A new feature (implemented through a new data structure) was recently added to the framework, in order to support volumetric 3D objects [11]. Such new feature allowed the development of simulation of medical procedures that required actions such as cutting and suturing virtual organs as it's covered in previous works [29], [14], [12].…”

Section: Collaboration In the Cybermed Frameworkmentioning

confidence: 99%

“…The multicasting protocol has the advantage of providing a better scalability, especially when it is used together with peer-topeer architectures, which dismisses the overhead imposed by central servers in client-server architectures [10]. The Cy-berMed framework has been created aiming at facilitating the development process of VR based medical simulations [11]. Its collaboration module, named CybCollaboration [12], has been recently added with new networking functionalities such as a traffic analyzer and multicasting protocol class that handle group communication, in order to provide better use of network bandwidth.…”

Section: Introductionmentioning

confidence: 99%

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Networking Issues for 3D Medical Collaborative Virtual Environments: Design and Applications

Paiva

Machado

Oliveira

et al. 2017

JIS

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Collaborative Virtual Environments (CVEs) are Virtual Reality (VR) systems and can simulate medical procedures such as surgeries performed by a group of remote users which can interact with one another through the simulation in real-time, with the aid of a network such as the Internet.Therefore, it is important to note that research on CVE-specific networking issues allows us to better understand the requirements for real-time applications. This paper discloses design and implementation issues of a peer-to-peer multicast architecture on the collaborative module of theCyberMed VR framework, aiming at providing better network scalability, as well as it shows as results, some developed applications as validation. Finally, we compared the performance of the newly implemented peer-to-peer multicast architecture with the peer-to-peer unicast previously existent with simulated models designed with OPNET Network Modeler and R statistical software. As result of our experiments, the null hypothesis was rejected (p = 2.2e-16, level of significance = 5%) confirming what we expected about the behavior of CyberMed’s multicast protocol.

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Section: Collaboration In the Cybermed Frameworkmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Networking Issues for 3D Medical Collaborative Virtual Environments: Design and Applications

Paiva

Machado

Oliveira

et al. 2017

JIS

View full text Add to dashboard Cite

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Comparing efficient data structures to represent geometric models for three-dimensional virtual medical training

Bscaro

Nunes

Oliveira

et al. 2016

Journal of Biomedical Informatics

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Data structures have been explored for several domains of computer applications in order to ensure efficiency in the data store and retrieval. However, data structures can present different behavior depending on applications that they are being used. Three-dimensional interactive environments offered by techniques of Virtual Reality require operations of loading and manipulating objects in real time, where realism and response time are two important requirements. Efficient representation of geometrical models plays an important part so that the simulation may become real. In this paper, we present the implementation and the comparison of two topologically efficient data structures - Compact Half-Edge and Mate-Face - for the representation of objects for three-dimensional interactive environments. The structures have been tested at different conditions of processors and RAM memories. The results show that both these structures can be used in an efficient manner. Mate-Face structure has shown itself to be more efficient for the manipulation of neighborhood relationships and the Compact Half-Edge was more efficient for loading of the geometric models. We also evaluated the data structures embedded in applications of biopsy simulation using virtual reality, considering a deformation simulation method applied in virtual human organs. The results showed that their use allows the building of applications considering objects with high resolutions (number of vertices), without significant impact in the time spent in the simulation. Therefore, their use contributes for the construction of more realistic simulators.

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