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Visualization of three-dimensional stomach shapes for virtual observation
2001
Excerpta Medica: International Congress Series
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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]
2013
Lecture Notes in Computer Science
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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]
2004
Lecture Notes in Computer Science
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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]
2004
Lecture Notes in Computer Science
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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]
2009
Lecture Notes in Computer Science
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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
2010
Journal of Food Science
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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
2016
International Journal of Computer Assisted Radiology and Surgery
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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]
2004
Lecture Notes in Computer Science
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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
2014
Bio-medical materials and engineering
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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
1997
Presence - Teleoperators and Virtual Environments
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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]
2006
Lecture Notes in Computer Science
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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
2007
World Journal of Gastroenterology
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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
2009
International Journal of Medical Robotics and Computer Assisted Surgery
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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
2000
Computers & graphics
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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
2019
Endoscopy International Open
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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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