Virtual Surgery
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
computer science crazy
Super Moderator
******

Posts: 3,048
Joined: Dec 2008
#1
21-09-2008, 11:44 PM


Rapid change is under way on sever fronts I medicine and surgery. Advance in computing power have enable continued growth in virtual reality, visualization, and simulation technologies. The ideal learning opportunities afforded by simulated and virtual environments have prompted their exploration as learning modalities for surgical education and training. Ongoing improvements in this technology suggest an important future role for virtual reality and simulation in medicine.


Medical virtual reality has come a long way in the past 10 years as a result of advances in computer imaging, software, hardware and display devices. Commercialisation of VR systems will depend on proving that they are cost effective and can improve the quality of care. One of the current limitations of VR implementation is shortcomings in the realism of the simulations. The main Impediment to realistic simulators is the cost and processing power of available hardware. Another factor hindering the progress and acceptability of VR applications is the need to improve human-computer interfaces, which can involve use of heavy head-mounted displays or bulky VR gloves that impede movement. There is also the problem of time delays in the simulator?s response to the users movements. Conflicts between sensory information can result in stimulator sickness, which includes side effects such as eyestrain, nausea, loss of balance and disorientation. Commercialisation of VR systems must also address certain legal and regulatory issues.
Use Search at http://topicideas.net/search.php wisely To Get Information About Project Topic and Seminar ideas with report/source code along pdf and ppt presenaion
Reply
seminar topics
Active In SP
**

Posts: 559
Joined: Mar 2010
#2
31-03-2010, 11:56 PM

please read topicideashow-to-virtual-surgery-full-report for more about Virtual Surgery technical informations
Use Search at http://topicideas.net/search.php wisely To Get Information About Project Topic and Seminar ideas with report/source code along pdf and ppt presenaion
Reply
Mano Ice
Active In SP
**

Posts: 1
Joined: Aug 2010
#3
23-08-2010, 02:46 PM

I need info on ppt related to virtual surgery...pls post me..........
Reply
seminar ideas
Super Moderator
******

Posts: 10,003
Joined: Apr 2012
#4
10-05-2012, 03:46 PM

Virtual Surgery


.pdf   VirtualSurgery.pdf (Size: 312.82 KB / Downloads: 42)


Abstract

This tool of ours called Bender, which is in its first stage emerges out of a need for the surge‐ons to virtualize heart surgeries which involves besides visualizing a three dimensional view of the heart, its valves and arteries from different angles the fine grained surgical operations like cutting and bending of the patient’s arteries and joining them in another appropriate place, all in real time. Bender uses triangle mesh and ray casting operations to achieve this, and inserts a cubic Bezier curve inside the cut artery as its ‘spine’ and project and implimentations the vertices of the cut part on it. When the user interactively and intuitively modifies any of the control points related to this spine, its length is maintained and corresponding vertices are ‘unpro‐jected’ back from it after deforming the same.

Introduction

In our knowledge, surgeons who are at present involved in heart surgery operations don’t really have a handy and intuitive graphical tool for simulating heart surgeries which main‐tains desirable properties and still manages to get a real time performance. This work is a step towards the same. It allows the surgeon to cut the arteries, bend and join them some‐where else in the cardio logical system. Professor Jarek Rossignac’s Mesh Viewer program has been modified to achieve the same. When the user presses the Left Mouse Button (LMB from now on) on any triangle on the triangle mesh to select it, and then at some other loca‐tion outside the triangle mesh, I draw a plane between this line drawn by the user, and the camera’s eye. This plane is used to find a curve of intersection between itself and the trian‐gle mesh. After tracing the curve of intersection and its triangles, I ‘topologically’ separate the triangles on both sides of the cutting plane. After the user inserts one or more cutting planes, he can initiate the bending of any of the parts separated by this act. The following section explain the techniques and algorithms involved.

Algorithms and Techniques

Here I present the techniques and algorithms implemented for the project and implimentation.

Cutting Plane Triangle Traversal

The first and foremost important implementation of the project and implimentation is the cutting plane traver‐sal to find the triangles which actually intersect with the plane. To achieve this, a simple tri‐angle walk algorithm is used, starting from the start triangle clicked by the user.
Reply
seminar flower
Super Moderator
******

Posts: 10,120
Joined: Apr 2012
#5
22-09-2012, 11:09 AM

Virtual Surgery


.doc   Virtual-Surgery.DOC (Size: 148.5 KB / Downloads: 22)

INTRODUCTION

Rapid change in most segments of the society is occurring as a result of increasingly more sophisticated, affordable and ubiquitous computing power. One clear example of this change process is the internet, which provides interactive and instantaneous access to information that must scarcely conceivable only a few years ago.
Same is the case in the medical field. Adv in instrumentation, visualisation and monitoring have enabled continual growth in the medical field. The information revolution has enabled fundamental changes in this field. Of the many disciplines arising from this new information era, virtual reality holds the greatest promise. The term virtual reality was coined by Jaron Lanier, founded of VPL research, in the late 1980’s. Virtual reality is defined as human computer interface that simulate realistic environments while enabling participant interaction, as a 3D digital world that accurately models actual environment, or simply as cyberspace.
Virtual reality is just beginning to come to that threshold level where we can begin using Simulators in Medicine the way that the Aviation industry has been using it for the past 50 Years — to avoid errors.

WHAT IS VIRTUAL SURGERY?

Virtual surgery, in general is a Virtual Reality Technique of simulating surgery procedure, which help Surgeons improve surgery plans and practice surgery process on 3D models. The simulator surgery results can be evaluated before the surgery is carried out on real patient. Thus helping the surgeon to have clear picture of the outcome of surgery. If the surgeon finds some errors, he can correct by repeating the surgical procedure as many number of times and finalising the parameters for good surgical results. The surgeon can view the anatomy from wide range of angles. This process, which cannot be done on a real patient in the surgery, helps the surgeon correct the incision, cutting, gain experience and therefore improve the surgical skills.
The virtual surgery is based on the patient specific model, so when the real surgery takes place, the surgeon is already familiar with all the specific operations that are to be employed.

TRAINING AND EDUCATION

The similarities between pilots and surgeons responsibilities are striking; both must, be ready to manage potentially life-threatening situations in dynamic, unpredictable environments. The long and successful use of flight simulation in air and space flight training has inspired the application of this technology to surgical and education.
Traditionally, textbook images or cadavers were used for training purposes, the former ie textbook images, limiting one’s perspective of anatomical structures to 2D plane and the latter, cadavers; limited in supply and generally allowing one-time use only. Today VR simulators are becoming the training methods of choice in medical schools. Unlike textbook examples, VR simulators allow users to view the anatomy from a wide range of angles and “fly through” organs to examine bodies from inside.

SURGICAL PLANNING

In traditional surgery planning, the surgeon calculates various parameters and procedure for surgery from his earlier experience and
imagination. The surgeon does not have an exact idea about the result of the surgery after it has been performed. So the result of the surgery depends mainly on human factors. This leads to lots of errors and even to the risk of losing the life of the patients. The incorporation of the virtual reality techniques helps in reducing the errors and plan the surgery in the most reliable manner.
‘The virtual reality technology can serve as useful adjunct to traditional surgical planning techniques. Basic research in image processing and segmentation of computed tomography and magnetic resonance scans has enabled reliable 3D reconstruction of important anatomical structures. This 3D imaging data have been used to further understand complex anatomical relationships in specific patient prior to surgery and also to examine and display the microsurgical anatomy of various internal operations.

IMAGE GUIDANCE

The integration of advanced imaging technology, image processing and 3D graphical capabilities has led to great interest in image guided and computer-aided surgery. The application of computational algorithm and VR visualization to diagnostic imaging, preoperative surgical
planning and interaoperative surgical navigation is referred to as Computer Aided Surgery. Navigation in surgery relates on stereotatic principles, based on the ability to locate a given point using geometric reference. Most of the work done in this field has been within neurosurgery. It also proved useful in Robotic Surgery, a new technique in which surgeon remotely manipulate robotic tool inside the patient body. An image guided operating robot has been developed Lavellee et al, and Shahide et al have described a micro’ surgical guidance system that allows navigation based on a 3D volumetric image data set. In one case, we use intra operative mapping of 3D image overlays on live video provides the surgeon with something like ‘X-ray vision’. This has been used in conjunction with an open MRI scan to allow precise, updated views of deformable brain tissues. Other researchers have focused on applications for orthopedic procedures. Improvements in sensor and imaging technology should eventually allow updates of patient’s position and intra operative shape changes in soft tissues with in reasonable time frame.

3D IMAGE SIMULATION

The first step in this is to generate a 3D model of the part of the body that undergo surgery Simulating human tissues-beit tooth enamel, skin or blood vessels-often starts with a sample from a flesh and blood person that is we should have a 3D model of the part of the body. Using computer graphics we first construct a reference model. Depending on this simulation needed, anatomical images can be derived from a series of patient’s Magnetic Resonance Images (MRI), Computed Tomography (CT) or video recording, which are 2D images. These images are segmented using various segmentation methods like SNAKE’. The final model is obtained by deforming the reference model with constraints imposed by segmentation results. The image is digitally mapped on to the polygonal mesh representing whatever part of the body on organ is being examined. Each vortex of the polygon is assigned attributes like colour and reflectivity from the reference model.

TOUCH SIMULATION

The second step in the simulation of surgery is simulating haptic-touch sensation. Physicians rely a great deal on their sense of touch for everything from routine diagnosis to complex, life saving surgical procedure. So haptics, or the abili to simulate touch, goes a long way to make virtual reality simulators more life like.
It also add a layer of technology that can stump the standard microprocessor. While the brain can be tricked into seeing seamless motion by flipping through 30 or so images per second, touch signals need to be refreshed up to once a millisecond. The precise rate at which a computer must update a haptic interface varies depending on what type of virtual surface is encountered-soft object require lower update rates than harder objects.
A low update rate may not prevent a users surgical instrument from sinking into the virtual flesh, but in soft tissues that sinking is what is expected. If we want something to come to an abrupt
stop that is in the case of born, etc it requires a higher update rates than bumping into something a little squishy like skin, liver etc.

CONCLUSION

Medical virtual reality has come a long way in the past 10 years as a result of advances in computer imaging, software, hardware and display devices. Commercialization of VR systems will depend on proving that they are cost effective and can improve the quality of care. One of the current limitations of VR implementation is shortcomings in the realism of the simulations. The main Impediment to realistic simulators is the cost and processing power of available hardware. Another factor hindering the progress and acceptability of VR applications is the need to improve human-computer interfaces, which can involve use of heavy head-mounted displays or bulky VR gloves that impede movement. There is also the problem of time delays in the simulator’s response to the users movements. Conflicts between sensory information can result in stimulator sickness, which includes side effects such as eyestrain, nausea, loss of balance and disorientation. Commercialization of VR systems must also address certain legal and regulatory issues.
Reply

Important Note..!

If you are not satisfied with above reply ,..Please

ASK HERE

So that we will collect data for you and will made reply to the request....OR try below "QUICK REPLY" box to add a reply to this page

Quick Reply
Message
Type your reply to this message here.


Image Verification
Please enter the text contained within the image into the text box below it. This process is used to prevent automated spam bots.
Image Verification
(case insensitive)

Possibly Related Threads...
Thread Author Replies Views Last Post
  10 Virtual Memory ppt seminar projects maker 0 411 12-09-2013, 12:29 PM
Last Post: seminar projects maker
  Memory Management: Overlays and Virtual Memory ppt study tips 0 447 22-06-2013, 12:19 PM
Last Post: study tips
  ELECTROOCULOGRAM BASED VIRTUAL KEYBOARD SEMINAR REPORT study tips 0 557 21-05-2013, 12:36 PM
Last Post: study tips
  TECHNICAL SEMINAR REPORT ON ADAPTIVE VIRTUAL KEYBOARD study tips 0 428 11-05-2013, 01:25 PM
Last Post: study tips
  Virtual Shuffling Keypad for secure ATMs project uploader 4 1,471 16-03-2013, 09:30 AM
Last Post: study tips
  PPT ON VIRTUAL KEYBORD project girl 0 357 15-12-2012, 06:00 PM
Last Post: project girl
  Virtual Smartphone over IP pdf project girl 0 352 05-12-2012, 11:46 AM
Last Post: project girl
  The Virtual Instrumentation PPT project girl 0 1,196 01-12-2012, 05:00 PM
Last Post: project girl
  Virtual Work Bench for Electronic Instrumentation Teaching seminar flower 0 423 17-09-2012, 10:51 AM
Last Post: seminar flower
  Virtual Reality Immersive Environments seminar girl 0 396 16-08-2012, 03:23 PM
Last Post: seminar girl