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Visualization of three-dimensional stomach shapes for virtual observation

Y. Mekada, M. Kasuga, J. Hasegawa, S. Nawano
2001 Excerpta Medica: International Congress Series  
We propose a virtualized stomach and its deformation method based on the approximation of physical features around the stomach.  ...  We use both X-ray TV images and external appearances of the subject while taking X-ray images, to transform the shapes of virtualized stomach. Several types of simulated results are presented.  ...  Ministry of Education, Science, Sports and Culture, Japan.  ... 
doi:10.1016/s0531-5131(01)00097-8 fatcat:tif2x5oohzhhpd27vodarbovne

Semi-automated Virtual Unfolded View Generation Method of Stomach from CT Volumes [chapter]

Masahiro Oda, Tomoaki Suito, Yuichiro Hayashi, Takayuki Kitasaka, Kazuhiro Furukawa, Ryoji Miyahara, Yoshiki Hirooka, Hidemi Goto, Gen Iinuma, Kazunari Misawa, Shigeru Nawano, Kensaku Mori
2013 Lecture Notes in Computer Science  
CT image-based diagnosis of the stomach is developed as a new way of diagnostic method. A virtual unfolded (VU) view is suitable for displaying its wall.  ...  The unfolding forces are determined so that the stomach wall is deformed to the expected shape.  ...  Parts of this research were supported by the MEXT, the JSPS KAKENHI Grant Numbers 21103006, 25242047, and the Kayamori Foundation of Informational Science Advancement.  ... 
doi:10.1007/978-3-642-40811-3_42 fatcat:aaxl3mgw2zg2nojkipfdbagfqe

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  
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.  ...  The previous method approximates the shape of the stomach using a surface model. This approximation is required for the stretching and reconstruction processes.  ...  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

Virtual Pneumoperitoneum for Generating Virtual Laparoscopic Views Based on Volumetric Deformation [chapter]

Takayuki Kitasaka, Kensaku Mori, Yuichiro Hayashi, Yasuhito Suenaga, Makoto Hashizume, Jun-ichiro Toriwaki
2004 Lecture Notes in Computer Science  
This paper describes a method for generating virtual pneumoperitoneum based on volumetric deformation and its application to virtual laparoscopy.  ...  The entire process consists of five major steps: (a) extracting the abdominal wall, (b) elastic modeling, (c) elastic deformation of the model, (d) deformation of the original image, and (e) rendering  ...  Technology, Japan Society for Promotion of Science, and the Grant-In-Aid for Cancer Research from the Ministry of Health and Welfare.  ... 
doi:10.1007/978-3-540-30136-3_69 fatcat:du36hxwfovedndxx5xp3sx6gui

Development of a High Resolution 3D Infant Stomach Model for Surgical Planning [chapter]

Qaiser Chaudry, S. Hussain Raza, Jeonggyu Lee, Yan Xu, Mark Wulkan, May D. Wang
2009 Lecture Notes in Computer Science  
Mitchell Parry, Todd Stokes, and Richard Moffitt from Bio-MIBLab for extensive discussions and preparation for this manuscript.  ...  Bioengineering Research Partnership R01CA108468, P20GM072069, Center for Cancer Nanotechnology Excellence U54CA119338), Georgia Cancer Coalition (Distinguished Cancer Scholar Award to MDW), Hewlett Packard, and  ...  Next, we use spring-mass system [4] to model stomach muscle deformation, and use virtual reality haptic device to control deformation upon touching force.  ... 
doi:10.1007/978-3-642-03767-2_75 pmid:30221253 pmcid:PMC6136844 fatcat:njf4vsfv45eg3k62637vcb6zs4

Modeling the Fluid Dynamics in a Human Stomach to Gain Insight of Food Digestion

M.J. Ferrua, R.P. Singh
2010 Journal of Food Science  
The goal of this study was to use computational fluid dynamics (CFD) to develop a 3-D model of the shape and motility pattern of the stomach wall during digestion, and use it to characterize the fluid  ...  A geometrical model of an averaged-sized human stomach was created, and its motility was characterized by a series of antral-contraction waves of up to 80% relative occlusion.  ...  Inst. of Food and Agriculture.  ... 
doi:10.1111/j.1750-3841.2010.01748.x pmid:21535567 pmcid:PMC2992692 fatcat:gsprkdv55fakrgrq3gucm6u2za

NOViSE: a virtual natural orifice transluminal endoscopic surgery simulator

Przemyslaw Korzeniowski, Alastair Barrow, Mikael H. Sodergren, Niels Hald, Fernando Bello
2016 International Journal of Computer Assisted Radiology and Surgery  
NOViSE is a first prototype, and the initial results indicate that it provides promising foundations for further development.  ...  The haptic device is custom-built, and the behaviour of the virtual flexible endoscope is based on an established theoretical framework-the Cosserat theory of elastic rods.  ...  Sodergren and N. Hald declare that there is no conflict of interest. Dr.  ... 
doi:10.1007/s11548-016-1401-8 pmid:27314591 pmcid:PMC5110615 fatcat:u5dhaf7s5nds3phyqpkaosoah4

Real-Time Incision Simulation Using Discontinuous Free Form Deformation [chapter]

Guy Sela, Sagi Schein, Gershon Elber
2004 Lecture Notes in Computer Science  
Realtime response and interactivity are crucial components of any such system and a major effort has been invested in finding ways to improve the performance of existing systems.  ...  In this paper, we propose the use of a new variant of Free Form Deformations that supports discontinuities (DFFD) in complex real time surgical simulations.  ...  Acknowledgment The liver, stomach and face models were retrieved from the 3D-cafe web site -www.3dcafe.com.  ... 
doi:10.1007/978-3-540-25968-8_13 fatcat:5aojrordqfcgfpfip4shvlkrg4

A non-invasive navigation system for retargeting gastroscopic lesions

Jiquan Liu, Bin Wang, Weiling Hu, Yun Zong, Jianmin Si, Huilong Duan
2014 Bio-medical materials and engineering  
is 8.2 ± 1.6 mm, and at the antral anterior wall is 7.9 ± 1.3 mm.  ...  For example, the procedure is an invasive operation and may not be durable due to the diffusion. Moreover, it is procedurally cumbersome with an associated risk of technical failure.  ...  Jianmin Si and Dr. Weiling Hu from the Sir Run Run Shaw Hospital, Hangzhou, for their help in improving the algorithm.  ... 
doi:10.3233/bme-141084 pmid:25226971 fatcat:dzxb4ssbhbdzvp4qrutjm6hcai

Virtual Endoscopy: Application of 3D Visualization to Medical Diagnosis

Richard M. Satava, Richard A. Robb
1997 Presence - Teleoperators and Virtual Environments  
anatomy or organ, and then the virtual organ is "flown through," giving the same visual impression and ¡mage as if the corresponding real organ had a video or fiberoptic endoscopie procedure performed  ...  With sophisticated signal processing and computational analysis, it may be possible in the future to perform a "numerical biopsy," that is, make a tissue diagnosis based upon spectral or other information  ...  Michael Vannier and Dr. Charlene Prather. The neuron data was provided by Dr. Joseph Szurszewski.  ... 
doi:10.1162/pres.1997.6.2.179 fatcat:dyjgl4li7ngvfgihv2kir4je6m

Immersive Open Surgery Simulation [chapter]

Ali Al-khalifah, Rachel McCrindle, Vassil Alexandrov
2006 Lecture Notes in Computer Science  
Whilst useful, such models lack the realism and interaction of the operating theatre.  ...  Realistic medical simulation has great potential for augmenting or complimenting traditional medical training or surgery planning, and Virtual Reality (VR) is a key enabling technology for delivering this  ...  Using a 3-D wand, the application enables the user to arbitrarily deform a pre-defined surface, the abdomen in this case, such that the virtual body can be cut open and the internal organ structures -stomach  ... 
doi:10.1007/11758501_125 fatcat:dlslozzf7ngjjktw26ac6ephzi

Advanced imaging and visualization in gastrointestinal disorders

Odd Helge Gilja
2007 World Journal of Gastroenterology  
strain measurement of the gastric wall.  ...  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 addition, its real-time and functional imaging capacity makes it well suited for soft tissue modelling.  ... 
doi:10.3748/wjg.v13.i9.1408 pmid:17457973 pmcid:PMC4146926 fatcat:4cylgtkgmnac7hi24k4mgygzyi

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  
We have shown that combining different modeling strategies for behavior, collision and graphics is possible and desirable.  ...  Recently several physics engines have been developed which offer multi-physics simulation capabilities including rigid and deformable bodies, cloth and fluids.  ...  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

Endoscopic surgery training using virtual reality and deformable tissue simulation

U. Kühnapfel, H.K. Çakmak, H. Maaß
2000 Computers & graphics  
Additionally, it is possible to perform irrigation and suction in the operation area. Active deformable objects are used for the morphodynamic simulation of the stomach and the intestines.  ...  Special attention is addressed to elastodynamically deformable tissue models and geometric modelling techniques for graphical real-time performance.  ...  Buess and his team from Minimal Invasive Surgery at University TuK bingen/FRG and the help of Mrs. Prof. L. Mettler and her team from University Kiel/FRG, Section for Gynaecology.  ... 
doi:10.1016/s0097-8493(00)00070-4 fatcat:x4wi5zx4mbbbpodebmxl5tyjy4

Sealed endoscopic full-thickness resection for gastric cancer: a pilot study in an ex vivo and in vivo porcine model

Hidekazu Kitakata, Tohru Itoh, Shinichi Kinami, Ken Kawaura, Kazu Hamada, Sadafumi Azukisawa, Rika Kobayashi, Junji Kamai, Takeo Kosaka
2019 Endoscopy International Open  
Background and study aims Endoscopic full-thickness resection (EFTR) is a useful procedure that allows minimal resection of the gastric wall because the tumor can be located endoscopically.  ...  Materials and methods Three whole stomachs were harvested from pigs for an ex vivo experiment, and seven pigs were used for an in vivo experiment.  ...  In this experiment, we examined whether it is possible to resect the virtual lesion from inside the stomach while keeping the lumen of the stomach expanded.  ... 
doi:10.1055/a-0777-1954 pmid:30648137 pmcid:PMC6327734 fatcat:v3sr72bh3jc4nkrlzgprgyfduq
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