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An approach for robot-assisted biosensing: Demonstration with MRI-guided MR spectroscopy

An approach for robot-assisted biosensing: Demonstration wit...

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10th IEEE International Workshop on Biomedical Engineering, BioEng 2011

作者： Sonmez, Ahmet E. Hedayati, Yousef Webb, Andrew G. Deng, Zhigang Navkar, Nikhil Tsekos, Nikolaos V. Medical Robotics Laboratory Department of Computer Science University of Houston Houston TX 77204 United States Computer Graphics and Interactive Media Laboratory Department of Computer Science University of Houston Houston TX 77204 United States Department of Radiology Leiden University Medical Centre Leiden Netherlands

ISBN: (纸本)9781457705526

Emerging and established methods, such as optical imaging and MR spectroscopy (MRS), offer new opportunities for in situ biosensing. The limited tissue penetration of these modalities can be addressed by locally placing the sensor via minimally invasive trans-needle or trans-catheter access. This work introduces a generic system that mechanically scans an area of interest with a sensor, capable of generating 1D scans while registering them to a guiding modality. computer simulations illustrate the operation of this approach for a miniature RF coil as the mechanically scanned biosensor. Experimental studies demonstrated the approach on phantoms, using MRI as the guiding modality, and an MR-compatible manipulator, which carried a miniature RF coil, was used to scan and collect MRS and generated 1D MRS scans co-registered to the guiding MRI. © 2011 IEEE.

关键词： Robotics

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A Review of Dynamic Motion Control Considering Physics for Real Time Animation Character

A Review of Dynamic Motion Control Considering Physics for R...

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Workshop on Digital Media and Digital Content Management (DMDCM)

作者： Ismahafezi Ismail Mohd Shahrizal Sunar Mohd Kufaisal Mohd Sidik Cik Suhaimi Yusof ViCube Laboratory Department of Computer Graphics and Multimedia Faculty of Computer Science and Information System Universiti Teknologi Malaysia Johor Malaysia

This paper presents a current motion research in the real time animation character. Real time animation character has the problem with unrealistic and unnatural character movement. This review focuses on three main parts in dynamic motion generation with physics consideration and control: skeleton hierarchy and kinematics, motion capture data animation, and active dynamic control.

关键词： Dynamics Animation Kinematics Real time systems Joints Humans

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New Silhouette Detection Algorithm to Create Real-Time Volume Shadow

New Silhouette Detection Algorithm to Create Real-Time Volum...

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Workshop on Digital Media and Digital Content Management (DMDCM)

作者： Hoshang Kolivand Mohd Shahrizal bin Sunar UTM ViCube Laboratory Department of Computer Graphics and Multimedia Faculty of Computer Science and Information System Universiti Teknologi Malaysia Johor Malaysia

In this paper a new algorithm to recognize occluder silhouette for generating shadow volume with some improvement of the traditional shadow volume algorithm is proposed. Silhouette detection is one of the expensive processes of volume shadows (VS). The triangular algorithm and visible-non-visible algorithm that are famous algorithms to detect the outline of occluder are renewed. An accurate comparison between these algorithms and a new algorithm has been done. The algorithm involves to detect silhouette and decreases the cost of implementation of VS. The obtained results confirm superiority of the proposed algorithm in terms of processing time to the previously used traditional algorithms. The last volume shadow algorithm using stencil buffer is rewritten and an algorithm for VS with silhouette detection together is proposed. It makes higher the number of frame per second.

关键词： Face Image edge detection Light sources Real time systems Arrays Rendering (computer graphics)

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Towards outcome based learning: An engineering education case

Towards outcome based learning: An engineering education cas...

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2011 IEEE Global Engineering Education Conference, EDUCON 2011

作者： Najjar, Jad Klobučar, Tomaž Nguyen-Ngoc, Anh Vu Totschnig, Michael Müller, Franz Simon, Bernd Karlsson, Mikael Eriksson, Henning Institute for Information Systems and New Media WU Vienna of Economics and Business Vienna Austria Laboratory for Open Systems and Networks Jozef Stefan Institute Ljubljana Slovenia Department of Computer Science University of Leicester Leicester United Kingdom Dept. of Interactive Media and Learning Umeå University Umeå Sweden Department of Computer Science AL-Quds University Jerusalem Palestine

ISBN: (纸本)9781612846439

Following the European initiatives like European Qualification Framework (EQF), Europass [4] and European Learner Mobility [3], the aim of this paper is to introduce specifications, services and applications that enable the management and use of learning outcome information. We present pilot implementation and validation of the adoption of standards and specifications related to outcome based learning. Prototypes are developed as widgets and modules of Learning Management Systems (LMS) like Moodle, to produce and import data about intended learning outcomes of learning opportunities and achieved learning outcomes of learners. We demonstrate an outcome based Engineering Education use case. © 2011 IEEE.

关键词： Engineering education

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Extracting geometric features of aortic valve annulus motion from dynamic MRI for guiding interventions

Extracting geometric features of aortic valve annulus motion...

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IEEE International Symposium on Biomedical Imaging

作者： Nikhil V. Navkar Erol Yeniaras Dipan J. Shah Nikolaos V. Tsekos Zhigang Deng Medical Robotics Laboratory Department of Computer Science University of Houston Houston TX USA Methodist DeBakey Heart & Vascular Center Methodist Hospital Houston TX USA Computer Graphics and Interactive Media Laboratory Department of Computer Science University of Houston Houston TX USA

ISBN: (纸本)9781424441273

Transcatheter aortic valve implant (TAVI) has emerged as a prominent approach for treating aortic stenosis. Success of such implants depends upon the accurate assessment of the geometric features such as the diameter, center and orientation of the aortic valve annulus (AVA). In this paper, we present a method for extracting these geometric features from magnetic resonance images (MRI). The method is based on finding an optimal fit for a circular ring mimicking AVA in the aortic root. Moreover, the presented approach provides dynamic tracking of the AVA in CINE MR images. This approach can be used for preoperative planning of prosthetic valve implantation, as well as for the emerging MRI guided manual, or with robot-assisted, annuloplasty.

关键词： Valves Magnetic resonance imaging Robots Heart Tracking Prosthetics

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Magnetic Resonance Based Control of a Robotic Manipulator for Interventions in the Beating Heart

Magnetic Resonance Based Control of a Robotic Manipulator fo...

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2011 IEEE International Conference on Robotics and Automation(2011年IEEE世界机器人与自动化大会 ICRA 2011)

作者： Nikolaos V. Tsekos Johann Lamaury Erol Yeniaras Zhigang Deng Nikhil V. Navkar Dipan J. Shah Karen Chin Medical Robotics Laboratory Department of Computer Science at University of HoustonHoustonTX 77204 Computer Graphics and Interactive Media Lab. Department of Computer ScienceUniversity of HoustonHo Methodist DeBakey Heart & Vascular Center HoustonTX 77030 USA

As a part of an ongoing project, in this paper we introduce the first version of a system which has a novel methodology for Cine (as in cinema) MRI based control of a cardiac robot for beating heart surgeries. The system uses the preoperative planning approach that we developed earlier, and integrates it to the intraoperative algorithms for controlling a robot and tracking some specific landmarks of a highly dynamical surgical field. In particular, our late studies presented herein aim to demonstrate the feasibility of integrating appropriate computational tools to achieve the volumetric image guidance for minimally invasive surgeries in the beating heart. We conceive of the system as practicable for in vitro experiments upon the completion of the first physical prototype, which may pave the way for expansion of the approach for other complex surgeries as well.

关键词： Heart Magnetic resonance imaging Manipulators Surgery Robot kinematics Valves

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Virtual Circuit Model for Low Power Scan Testing in Linear Decompressor-Based Compression Environment

Virtual Circuit Model for Low Power Scan Testing in Linear D...

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Asian Test Symposium (ATS)

作者： Zhen Chen Jia Li Dong Xiang Yu Huang Department of Computer Science and Technology Tsinghua National Laboratory for Information Science and Technology Beijing China Integrated Circuit Advaced Process Center Institute of Microelectronics Chinese Academy of Sciences Beijing China Mentor Graphics Corporation Wilsonville OR USA

Large test data volume and high test power consumption are two major concerns for the industry when testing large integrated circuits. Linear decompress or-based compression (LDC) is efficient in reducing test data volume, while X-filling during ATPG can efficiently reduce test power with low overhead. However, traditional X-filling methods cannot be reused in the LDC environment. In this paper, we propose a virtual circuit model to make the linear de-compressor transparent to the external testing. As a result, existing X-filling methods can be reused to reduce test power. Experimental results on benchmark circuits demonstrate the efficiency of the proposed approach.

关键词： Vectors Equations Mathematical model Integrated circuit modeling Automatic test pattern generation Benchmark testing

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Towards outcome based learning: An engineering education case

Towards outcome based learning: An engineering education cas...

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IEEE Education Engineering (EDUCON)

作者： Jad Najjar Tomaž Klobučar Anh Vu Nguyen-Ngoc Michael Totschnig Franz Müller Bernd Simon Mikael Karlsson Henning Eriksson Institute for Information Systems and New Media WU Vienna of Economics and Business (Austria) Laboratory for Open Systems and Networks Jozef Stefan Institute Ljubljana Slovenia Department of Computer Science University of Leicester Leicester UK Institute of Information Systems and New Media WU Vienna of Economics and Business Vienna Austria Department of Interactive Media and Learning Umeå University Umea Sweden

Following the European initiatives like European Qualification Framework (EQF), Europass and European Learner Mobility, the aim of this paper is to introduce specifications, services and applications that enable the management and use of learning outcome information. We present pilot implementation and validation of the adoption of standards and specifications related to outcome based learning. Prototypes are developed as widgets and modules of Learning Management Systems (LMS) like Moodle, to produce and import data about intended learning outcomes of learning opportunities and achieved learning outcomes of learners. We demonstrate an outcome based Engineering Education use case.

关键词： Engineering education Data models Context Europe Qualifications Standards

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Enhancing the Top Level Visualization Ontology

Enhancing the Top Level Visualization Ontology

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作者： Pérez, Alberto Morell Risquet, Carlos Pérez Gómez, Jorge Marx Department of Computer Science Computer Graphics Laboratory Central University of Las Villas Santa Clara Cuba Department of Computing Science Business Information Systems I / VLBA Carl von Ossietzky University Oldenburg Oldenburg Germany

ISBN: (纸本)9789728939229

One purpose of the Top Level Visualization Ontology is to provide a common vocabulary to describe visualization data, processes, and products. However, there are two aspect where its expressiveness is poor: the models of the visualization process and the data used on it. The aim of this paper is to describe some modifications of this ontology which lead to a better representation of the visualization process and data models, and facilitate the accommodation of new models. A detailed description of the new ontology's components is given. © 2010 IADIS.

关键词： Visualization

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A novel semi-blind-and-semi-reversible robust watermarking scheme for 3D polygonal models

A novel semi-blind-and-semi-reversible robust watermarking s...

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作者： Lin, Chao-Hung Chao, Min-Wen Liang, Chan-Yu Lee, Tong-Yee Department of Geomatics National Cheng-Kung University No. 1 Ta-Hsueh Road Tainan 701 Taiwan Computer Graphics Group/Visual System Laboratory Department of Computer Science and Information Engineering National Cheng-Kung University No. 1 Ta-Hsueh Road Tainan 701 Taiwan

We introduce a novel semi-blind-and-semireversible robust watermarking scheme for three-dimensional (3D) polygonal models. The proposed approach embeds watermarks in the significant features of 3D models in a spread-spectrum manner. This novel scheme is robust against a wide variety of attacks including rotation, translation, scaling, noise addition, smoothing, mesh simplifications, vertex reordering, cropping, and even pose deformation of meshes. To the best of our knowledge, the existing approaches including blind, semi-blind, and non-blind detection schemes cannot withstand the attack of pose editing, which is a very common routine in 3D animation. In addition, the watermarked models can be semi-reversed (i.e., the peak signal-to-noise ratio (PSNR) of the recovered models is greater than 90 dB in all experiments) in semi-blind detection scheme. Experimental results show that this novel approach has many significant advantages in terms of robustness and invisibility over other state-of-the-art approaches. © Springer-Verlag 2010.

关键词： Watermarking

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