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Soft-Tissue Deformation for In Vivo Volume Animation

Taehyun Rhee, J.P. Lewis, Ulrich Neumann, Krishna Nayak
2007 15th Pacific Conference on Computer Graphics and Applications (PG'07)  
The pipeline consists of in-vivo volume scans, kinematic joint estimation, volumetric joint weight computation, soft-tissue volume deformation, and direct volume rendering.  ...  Articulated body animation with smooth skin deformation is an important topic in computer graphics.  ...  Conclusion In any arbitrary pose, our volume SSD algorithm can generate smooth deformation of the soft-tissue volume while preserving the hard tissue volume.  ... 
doi:10.1109/pg.2007.46 dblp:conf/pg/RheeLNN07 fatcat:isn3a4k5bne5xgvnvib5jndfdu

Physically Based Virtual Surgery Planning and Simulation Tools for Personal Health Care Systems [chapter]

Firat Dogan, Yasemin Atilgan
2009 Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering  
In this paper, all the aspects of the former and current developments in surgery planning and simulation related tools are presented, future directions and expectations are investigated for better electronic  ...  The virtual surgery planning and simulation tools have gained a great deal of importance in the last decade in a consequence of increasing capacities at the information technology level.  ...  For given surgical simulation, soft tissue deformation accuracy and computation time are the two main constraints.  ... 
doi:10.1007/978-3-642-03978-2_8 fatcat:lrqbeqzrrrd3tftq7eq7jd7qyy

In-Vivo and Postmortem Compressive Properties of Porcine Abdominal Organs [chapter]

Jeffrey D. Brown, Jacob Rosen, Mika N. Sinanan, Blake Hannaford
2003 Lecture Notes in Computer Science  
It is important to test tissues in-vivo and apply surgically relevant ranges of force, deformation, and duration.  ...  In order to provide realistic haptic feedback, simulators must incorporate accurate computational models of the in-vivo mechanical behavior of soft tissues.  ...  We recorded both in-vivo and postmortem data in animal experiments using the MEG. Results show nonlinear stress-strain behavior for all tissues tested.  ... 
doi:10.1007/978-3-540-39899-8_30 fatcat:lpztgexp5zdkrfk3mo2omajgmi

Measurements of Soft-Tissue Mechanical Properties to Support Development of a Physically Based Virtual Animal Model [chapter]

Cynthia Bruyns, Mark Ottensmeyer
2002 Lecture Notes in Computer Science  
We present the results of in vitro testing of rat organ tissues and discuss preliminary comparisons of the results with a Finite Element simulation of the test scenario and a method to extract parameters  ...  Though the course of ongoing development of a dynamic "Virtual Rat", the need for physically based simulation has been established.  ...  For volumetric objects however, interactions with the tissues become less localized and when coupled with volume preserving methods, can provide "more appealing" deformations.  ... 
doi:10.1007/3-540-45786-0_35 fatcat:gqk346em6ra4dgycuhghjgbtsq

Immediate in vivo response of the cortex and the blood–brain barrier following dynamic cortical deformation in the rat

David I Shreiber, Douglas H Smith, David F Meaney
1999 Neuroscience Letters  
The relationship between the response of the cortex and injury pattern points towards a new opportunity for control of the distribution and extent of injury patterns in animal models through a precise  ...  Using a transient vacuum pulse applied to the exposed cortical surface, we found that the displacement of the cortex and the extent of in vivo blood-brain barrier breakdown were related significantly to  ...  BBB breakdown in animal models can be achieved by controlling the deformation of brain tissue during percussion or direct impact.  ... 
doi:10.1016/s0304-3940(98)00853-2 pmid:10027542 fatcat:temjwo3k5jgbtauptefbezs6di

Page 1148 of Compendium : Continuing Education for Veterinarians Vol. 16, Issue 9 [page]

1994 Compendium : Continuing Education for Veterinarians  
Rigid prosthetic materials are less likely to sag when used to close large, soft tissue defects”'’; how- ever, nonpliable materials may erode soft tissues.“ Wrinkles in mesh materials can result in an  ...  The tensile (breaking) and bursting strength of mate- rials are commonly tested in vitro’ and in vivo after the materials are infiltrated with connective tissue.”  ... 

Ultra-sensitive optical coherence elastography using high-dynamic-range force loading scheme for cervical rigidity assessment

Xinwen Yao, Dawei Li, Hyeon-Cheol Park, Defu Chen, Honghua Guan, Mala Mahendroo, Xingde Li
2019 Biomedical Optics Express  
An ultra-sensitive, wide-range force loading scheme is proposed for compression optical coherence elastography (OCE) that allows for the quantitative analysis of cervical tissue elasticity ex vivo.  ...  We designed a force loading apparatus featuring a water sink for minuscule incremental loading through a volume-controlled water droplet, from which the Young's modulus can be calculated by fitting the  ...  Acknowledgement The authors would like to thank Ms Asha Varghese for preparing the rodent cervical samples, and Dr Wu Yuan, Mr. Ang Li, and Dr Wenxuan Liang for the enlightening discussion.  ... 
doi:10.1364/boe.383720 pmid:32133219 pmcid:PMC7041475 fatcat:6botma5mjzbmrkmvjabdi5qcdu

Cell-assisted lipotransfer in the clinical treatment of facial soft tissue deformity

Li Ma, Huicai Wen, Xueping Jian, Huaiwei Liao, Yunpeng Sui, Yanping Liu, Guizhen Xu
2015 Plastic Surgery  
CAL in the clinical treatment of soft tissue deformity ASCs and the SVF have been applied in the clinical treatment of soft tissue augmentation.  ...  This evidence suggests that CAL is a suitable technology for the treatment of soft tissue deformity.  ... 
doi:10.1177/229255031502300304 pmid:26361629 pmcid:PMC4557713 fatcat:rdrwycbwfvak3crlbhgu46rcje

Preenrichment with Adipose Tissue-Derived Stem Cells Improves Fat Graft Retention in Patients with Contour Deformities of the Face

Muhammad M. Bashir, Muhammad Sohail, Fridoon J. Ahmad, Mahmood S. Choudhery
2019 Stem Cells International  
Significantly lower absorption of graft due to the use of ASCs improves the clinical outcomes of conventional fat grafting for contour deformities of the face.  ...  Quick absorption of adipose tissue grafts makes the outcomes less satisfactory for clinical applications.  ...  The authors are grateful to Mr Asif Hanif for help in analysis of data.  ... 
doi:10.1155/2019/5146594 pmid:31827528 pmcid:PMC6886337 fatcat:qw3tdlocjvbe7ofkmtu6d6td54

Microscale Inorganic LED Based Wireless Neural Systems for Chronic in vivo Optogenetics

Raza Qazi, Choong Yeon Kim, Sang-Hyuk Byun, Jae-Woong Jeong
2018 Frontiers in Neuroscience  
Here we review recent state-of-the art μ-ILED integrated soft wireless optogenetic tools suitable for use in freely moving animals and discuss opportunities for future developments.  ...  However, conventional approaches relying on rigid and tethered optical probes cause significant tissue damage as well as disturbance with natural behavior of animals, thus preventing chronic in vivo optogenetics  ...  by tissue deformation of animals in motion.  ... 
doi:10.3389/fnins.2018.00764 pmid:30405343 pmcid:PMC6205995 fatcat:jbqw7a2zcrdnhd6ckqsgj4y664

Gaining Insight into the Deformation of Achilles Tendon Entheses in Mice

Julian Sartori, Sebastian Köhring, Stefan Bruns, Julian Moosmann, Jörg U. Hammel
2021 Advanced engineering materials 23(11)  
Examinations into the 3D tissue deformation under load are an important element in this process.  ...  Understanding the biomechanics of tendon entheses is fundamental for surgical repair and tissue engineering but also relevant in biomimetics and paleontology.  ...  Brinkmann for keeping the animals, Sabine Bischoff and Michael van der Wall for advice with regard to animal provision and animal rights, Dirk Arnold for recommendations with regard to tissue preparation  ... 
doi:10.3204/pubdb-2021-03299 fatcat:fzmr4eh4s5be7e6luojs3ykncq

Improving tissue expansion protocols through computational modeling

Taeksang Lee, Elbert E. Vaca, Joanna K. Ledwon, Hanah Bae, Jolanta M. Topczewska, Sergey Y. Turin, Ellen Kuhl, Arun K. Gosain, Adrian Buganza Tepole
2018 Journal of The Mechanical Behavior of Biomedical Materials  
Tissue expansion is a common technique in reconstructive surgery used to grow skin in vivo for correction of large defects.  ...  Here we explore four tissue expansion protocols by systematically varying the inflation volume and the protocol duration in a porcine model.  ...  Therefore, comparing the total in vivo deformation between animals ignores this source of variation.  ... 
doi:10.1016/j.jmbbm.2018.03.034 pmid:29627733 pmcid:PMC6028355 fatcat:3v6ey53b3zctbb4u7uzzjfxbbe

Active volumetric musculoskeletal systems

Ye Fan, Joshua Litven, Dinesh K. Pai
2014 ACM Transactions on Graphics  
Volume preservation is crucial for accurately capturing the dynamics of muscles and other biological tissues.  ...  Muscles are simulated using an Eulerian-on-Lagrangian discretization that handles volume preservation, large deformation, and close contact between adjacent tissues.  ...  Demer for the MRI data (supported by National Eye Institute grant EY08313) described in Section 8.2.  ... 
doi:10.1145/2601097.2601215 fatcat:7j6blvtcejgadj2q4mkfdiiv34

VR-Based Simulators for Training in Minimally Invasive Surgery

Cagatay Basdogan, Mert Sedef, Matthias Harders, Stefan Wesarg
2007 IEEE Computer Graphics and Applications  
Therefore, recent research has focused on in vivo, in situ measurement of soft tissues' mechanical properties.  ...  In the past, most tissue experiments were ex vivo studies. [7] [8] [9] For ex vivo measurements, the tissue's biological functioning has ceased; in other words, the tissue to be measured is dead.  ... 
doi:10.1109/mcg.2007.51 pmid:17388203 fatcat:zhmkffbefbfhhbt5i7bohesy7a

Enzymatic Recontouring of Auricular Cartilage in a Rabbit Model

Phillip L. Massengill, Paulino E. Goco, L. Layne Norlund, Jeanne Muir-Padilla
2005 Archives of Facial Plastic Surgery  
We injected hyaluronidase in 5 ears and elastase in 5 ears. After injection, the ears were contoured and splinted for 4 weeks. In the third phase, we changed the injection pathway in 5 animals.  ...  Methods: The first phase determined the most effective volume and concentration required to affect the cartilage. To accomplish this task, we used ex vivo rabbit ears from a slaughterhouse.  ...  In our preliminary ex vivo studies using higher concentrations of elastase (2.0 mg), we observed cartilage and soft-tissue necrosis.  ... 
doi:10.1001/archfaci.7.2.104 pmid:15781721 fatcat:4wzkzyod3zdaxirg7jpwsbb3me
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