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Virtual Unfolding of the Stomach Based on Volumetric Image Deformation [chapter]

Kensaku Mori, Hiroki Oka, Takayuki Kitasaka, Yasuhito Suenaga, Jun-ichiro Toriwaki
2004 Lecture Notes in Computer Science  
This paper describes a method for generating unfolded views of the stomach based on 3-D gray image deformation. Unfolded views can show the status of the stomach in one image.  ...  In the proposed method, we generate the approximated shape using a volumetric model. The volumetric model is deformed so as to generate unfolded views of the stomach.  ...  of Science, and the Grant-In-Aid for Cancer Research from the Ministry of Health and Welfare of Japanese Government.  ... 
doi:10.1007/978-3-540-30136-3_48 fatcat:vgy5mkghkvevjde6o4udtzeiuq

PPU-friendly Biomechanical Models for Virtual Medicine

Jing Qin, Yim-Pan Chui, Simon Sze-Ming Ho, Wai-Sang Poon, Pheng Ann Heng
2009 International Journal of Virtual Reality  
The main focus of virtual medicine is to develop and deliver virtual reality based training and computer enhanced learning in medicine.  ...  With the change in the health economics, the advances of minimal invasive surgery (MIS) and shortening of hospitalization time, source and availability of patient for teaching become a major problem.  ...  ACKNOWLEDGMENT The work described in this paper was fully supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region (Project No.  ... 
doi:10.20870/ijvr.2009.8.1.2709 fatcat:mwsl4sz3abexrn75smwspwokcq

Using the PhysX engine for physics-based virtual surgery with force feedback

Anderson Maciel, Tansel Halic, Zhonghua Lu, Luciana P. Nedel, Suvranu De
2009 International Journal of Medical Robotics and Computer Assisted Surgery  
Methods-In this work, we propose solutions to this problem and demonstrate how a multimodal surgical simulation environment may be developed based on NVIDIA's PhysX physics library.  ...  Conclusions-To develop complex and realistic surgical trainers with realistic organ geometries and tissue properties demands stable physics-based deformation methods which are not always compatible with  ...  Acknowledgments Grant Partial support of this work through the R01 EB005807-01 grant from NIH/NIBIB and 151820/2007-4 grant from CNPq-Brazil are gratefully acknowledged.  ... 
doi:10.1002/rcs.266 pmid:19449317 pmcid:PMC2810833 fatcat:5bvcnyqlqvgapiw32sydhjy5be

VR-Caps: A Virtual Environment for Capsule Endoscopy [article]

Kagan Incetan, Ibrahim Omer Celik, Abdulhamid Obeid, Guliz Irem Gokceler, Kutsev Bengisu Ozyoruk, Yasin Almalioglu, Richard J. Chen, Faisal Mahmood, Hunter Gilbert, Nicholas J. Durr, Mehmet Turan
2021 arXiv   pre-print
on real medical data.  ...  Current capsule endoscopes and next-generation robotic capsules for diagnosis and treatment of gastrointestinal diseases are complex cyber-physical platforms that must orchestrate complex software and  ...  the 3D shape of the whole organ based on visual feedback from endoscope camera (Widya et al., 2019) .  ... 
arXiv:2008.12949v2 fatcat:pdtbj2ytajhrzcdd3jjyloilqq

Mechanical Properties of the Human Stomach under Uniaxial Stress Action

Grzegorz Rotta, Jarosław Kobiela, Szymon Grymek, Magdalena Karczewska
2019 Current Science  
Twenty-two fresh human stomach specimens were used for the experimental study of its general strength.  ...  Finally, data on mechanical properties of the stomach wall with detailed analysis of anatomical regions of the stomach have been presented.  ...  Fresh human stomach specimens were used for an experimental study of the general strength of these organs.  ... 
doi:10.18520/cs/v116/i11/1886-1893 fatcat:axlbyle7crhnpk53zlvfnhdrxq

Virtual endoscopy: development and evaluation using the Visible Human Datasets

R.A Robb
2000 Computerized Medical Imaging and Graphics  
Virtual endoscopy (VE) is a new method of diagnosis using computer processing of 3D image datasets (such as CT or MRI scans) to provide simulated visualizations of patient specific organs similar or equivalent  ...  Additionally, the adjunctive value of full 3D imaging (e.g. looking "outside" of the normal field of view) during the VE exam is being evaluated.  ...  Special thanks are extended to Darlene Bernard for preparation of the manuscript.  ... 
doi:10.1016/s0895-6111(00)00014-8 pmid:10838008 fatcat:c2l7vtip6bdkjcx6bcq4zpr3he

Virtual Endoscopy: Application of 3D Visualization to Medical Diagnosis

Richard M. Satava, Richard A. Robb
1997 Presence - Teleoperators and Virtual Environments  
Virtual endoscopy is a diagnostic technique in which a three-dimensional imaging technology (CT scan, MRI scan, ultrasound) is used to create a computer-generated representation of a specific patient's  ...  The potential is to provide a computer diagnosis to replace an endoscopie procedure, not only for conventional endoscopy such as bronchoscopy, colonoscopy, sinusoscopy, or hysteroscopy, but also for areas  ...  The authors also acknowledge the use of the Visible Human Male Dataset from the National Library of Medicine. Special thanks are extended to Darlene Bernard for preparation of the manuscript.  ... 
doi:10.1162/pres.1997.6.2.179 fatcat:dyjgl4li7ngvfgihv2kir4je6m

Haptic simulation of the liver with respiratory motion

Pierre-Frédéric Villard, Mathieu Jacob, Derek Gould, Fernando Bello
2009 Studies in Health Technology and Informatics  
This paper presents a framework that accurately simulates respiratory motion, allowing for the fine tuning of relevant parameters in order to produce a patient-specific breathing pattern that can then  ...  Ideally, this physiological behaviour should be taken into account in a virtual reality biopsy simulator.  ...  The method used for the deformation modelling is based on the 3D Chain-Mail algorithm extension proposed by Li and Brodlie [8] . In this model, the object is defined as a set of point elements.  ... 
pmid:19377194 fatcat:thwm2ujnv5g4vhv7x7etabc3cy

Toward Anatomical Simulation for Breath Training in Mind/Body Medicine [chapter]

Benjamin Sanders, Paul DiLorenzo, Victor Zordan, Donald Bakal
2009 Recent Advances in the 3D Physiological Human  
To this end, in this paper, we explore an adaptation method that employs optimization to modify a generic model of respiration to fit the breath patterns of specific individuals.  ...  Visualization of the respiratory system is made possible through an anatomically inspired, physically based model of the torso.  ...  These examples model the change in shape of a muscle through geometric muscle bellies that stretch and deform based on length.  ... 
doi:10.1007/978-1-84882-565-9_7 fatcat:pjbx6dw665efjbb6pkgomh2vm4

Adaptive Mesh Expansion Model (AMEM) for Liver Segmentation from CT Image

Xuehu Wang, Jian Yang, Danni Ai, Yongchang Zheng, Songyuan Tang, Yongtian Wang, Qinghui Zhang
2015 PLoS ONE  
The proposed method is evaluated on the basis of different criteria applied to 10 clinical data sets.  ...  The virtual deformable simplex model (DSM) is introduced to represent the mesh, in which the motion of each vertex can be easily manipulated.  ...  Despite having been studied for several years, the deformable model-based method still required improvement.  ... 
doi:10.1371/journal.pone.0118064 pmid:25769030 pmcid:PMC4358832 fatcat:4yufz4czrbe3ni5y6bmm5nb4hq

Advanced imaging and visualization in gastrointestinal disorders

Odd Helge Gilja
2007 World Journal of Gastroenterology  
Advanced methods for endoscopic ultrasound, three-dimensional (3D) ultrasound, and tissue Doppler (Strain Rate Imaging) provide detailed information of the GI tract.  ...  Imaging methods such as ultrasonography, magnetic resonance imaging (MRI), endoscopy, endosonography, and elastography will be outlined and visualization with Virtual Reality and haptic methods.  ...  In another study, an analytical method was developed to describe the three-dimensional geometry of the gastric antrum, the gastric fundus and the whole stomach based on 3D ultrasound acquisitions [56]  ... 
doi:10.3748/wjg.v13.i9.1408 pmid:17457973 pmcid:PMC4146926 fatcat:4cylgtkgmnac7hi24k4mgygzyi


C F Martin
1913 Canadian Medical Association Journal  
not overestimate the importance of many of our usual methods of physical examination.  ...  -As everyone knows, we have added to our understanding of the position, size, and shape of the stomach: we have discovered that they are normally subject to great variations, and, in consequence, we should  ...  The umbilicus, depending for its relative position upon the shape of the diaphragm and the conformation of the abdomen generally, is altogether too variable a point for accurate mensuration.  ... 
pmid:20310444 pmcid:PMC1579900 fatcat:ww3wpcv6bfd53pidskg6zil6nq

Graphic and haptic simulation system for virtual laparoscopic rectum surgery

Jun J. Pan, Jian Chang, Xiaosong Yang, Jian J. Zhang, Tahseen Qureshi, Robert Howell, Tamas Hickish
2011 International Journal of Medical Robotics and Computer Assisted Surgery  
Methods Data from MRI of the rectum and real operation videos are used to construct the virtual models.  ...  Finally, a real-time cutting technique based on mesh is employed to represent the incision operation.  ...  Acknowledgements The authors would like to thank Wenxi Li for his animation video in this project.  ... 
doi:10.1002/rcs.399 pmid:21563287 fatcat:de6hdubgj5bv5cfgf7tolfhhsu

Soft Tissue Modeling for Surgery Simulation [chapter]

Hervé Delingette, Nicholas Ayache
2004 Handbook of Numerical Analysis  
We also wish to thank Clément Forest and Jean-Christophe Lombardo for their numerous contributions on force-feedback rendering, collision detection as well as mesh data structure.  ...  Acknowledgments We would like to thank Matthias Teschner, Denis Laurendeau and Jean-Marc Schwartz for their priceless comments and for proofreading this article.  ...  In [64] , Lombardo et al. proposed an original collision detection method based on the OpenGL graphics library which is especially well-suited for elongated instruments shaped like those used in laparoscopic  ... 
doi:10.1016/s1570-8659(03)12005-4 fatcat:ezfsuftbvzfcvgyshazjowhr3u

Principles and Applications of Medical Virtual Environments [article]

F. P. Vidal, F. Bello, K. Brodlie, N.W. John, D. Gould, R. Phillips, N. J. Avis
2004 Eurographics State of the Art Reports  
The medical domain offers many excellent opportunities for the application of computer graphics, visualization, and virtual environments, offering the potential to help improve healthcare and bring benefits  ...  This report provides a comprehensive overview of the state-of-the-art in this exciting field.  ...  With geometrically-based modelling, the shape of an object is adjusted by changing the position of some control points, or by adjusting the parameters of an implicit function defining the shape.  ... 
doi:10.2312/egst.20041024 fatcat:of4sims3trcb5cuyyqjx7omoa4
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