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Haptic and visual simulation of material cutting process: a study focused on bone surgery and the use of simulators for education and training
KTH, School of Technology and Health (STH).
2006 (English)Licentiate thesis, comprehensive summary (Other scientific)
Abstract [en]

A prototype of a haptic and virtual reality simulator has been developed for simulation of the bone milling and material removal process occurring in several operations, e.g. temporal bone surgery or dental milling. The milling phase of an operation is difficult, safety critical and very time consuming. Reduction of operation time by only a few percent would in the long run save society large expenses. In order to reduce operation time and to provide surgeons with an invaluable practicing environment, this licentiate thesis discusses the introduction of a simulator system to be used in both surgeon curriculum and in close connection to the actual operations.

The virtual reality and haptic feedback topics still constitute a young and unexplored area. It has only been active for about 10-15 years for medical applications. High risk training on real patients and the change from open surgery to endoscopic procedures have enforced the introduction of haptic and virtual reality simulators for training of surgeons. Increased computer power and the similarity to the successful aviation simulators also motivate to start using simulators for training of surgical skills.

The research focus has been twofold: 1) To develop a well working VR-system for realistic graphical representation of the skull itself including the changes resulting from milling, and 2) to find an efficient algorithm for haptic feedback to mimic the milling procedure using the volumetric Computer Tomography (CT) data of the skull. The developed haptic algorithm has been verified and tested in the simulator. The visualization of the milling process is rendered at a graphical frame rate of 30 Hz and the haptic rendering loop is updated at 1000 Hz. Test results show that the real-time demands are fulfilled. The visual and haptic implementations have been the two major steps to reach the over all goal with this research project.

A survey study is also included where the use of VR and haptic simulators in the surgical curriculum is investigated. The study starts with a historical perspective of the VR and haptic topics and is built up by answering different questions related to this topic and the implementation of simulators at the medical centres. The questions are of general concern for those developing surgical VR and haptic simulators.

Suggested future work includes modelling, development and validation of the haptic forces occurring in the milling process and, based on this, implementation in the simulator system. Also, further development of the simulator should be done in close cooperation with surgeons in order to get appropriate feedback for further improvements of the functionality and performance of the simulator.

Place, publisher, year, edition, pages
Haninge: KTH Syd , 2006. , ix, 28 p.
Series
Trita-STH : report, ISSN 1653-3836 ; 2006:3
Keyword [en]
surgical simulation, virtual reality, haptic feedback, surgical training, medical simulators, metrics, 3D visualization
National Category
Biomedical Laboratory Science/Technology
Identifiers
URN: urn:nbn:se:kth:diva-4052OAI: oai:DiVA.org:kth-4052DiVA: diva2:10564
Presentation
2006-06-09, B442, KTH, Brinellvägen 83, Stockholm, 10:15
Opponent
Supervisors
Note
QC 20101112Available from: 2006-06-14 Created: 2006-06-14 Last updated: 2010-11-12Bibliographically approved
List of papers
1. A haptic VR milling surgery simulator - using high-resolution CT-data
Open this publication in new window or tab >>A haptic VR milling surgery simulator - using high-resolution CT-data
2006 (English)In: Studies in Health Technology and Informatics, ISSN 0926-9630, E-ISSN 1879-8365, Vol. 119, 138-143 p.Article in journal (Refereed) Published
Abstract [en]

A haptic virtual reality milling simulator using high resolution volumetric data is presented in this paper. We discuss the graphical rendering performed from an iso-surface generated using marching cubes with a hierarchical storage method to optimize for fast dynamic changes to the data during the milling process. We also present a stable proxy-based haptic algorithm used to maintain a tip position on the surface avoiding haptic fall-through.

Keyword
algorithm, article, bone, computer assisted tomography, computer interface, computer simulation, education, human, surgery, Sweden
National Category
Biomedical Laboratory Science/Technology
Identifiers
urn:nbn:se:kth:diva-5997 (URN)000269690200032 ()16404033 (PubMedID)2-s2.0-33645740985 (Scopus ID)
Note
QC 20101112. Uppdaterad från Manuskript till Published (20101112). 14th Conference on Medicine Meets Virtual Reality, Long Beach, CA, JAN 24-27, 2006Available from: 2006-06-14 Created: 2006-06-14 Last updated: 2017-12-14Bibliographically approved
2. A virtual and haptic milling surgery simulator
Open this publication in new window or tab >>A virtual and haptic milling surgery simulator
2006 (English)Report (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH, 2006. 21 p.
Series
Trita-STH : report, ISSN 1653-3836 ; 2006:04
National Category
Biomedical Laboratory Science/Technology
Identifiers
urn:nbn:se:kth:diva-5998 (URN)
Note
QC 20101112Available from: 2006-06-14 Created: 2006-06-14 Last updated: 2010-11-12Bibliographically approved
3. The use of virtual reality and haptic simulators for training and education of surgical skills
Open this publication in new window or tab >>The use of virtual reality and haptic simulators for training and education of surgical skills
2006 (English)In: Simulation in Healthcare: journal of the society for simulation in healthcare, ISSN 1559-2332Article in journal (Other academic) Submitted
National Category
Biomedical Laboratory Science/Technology
Identifiers
urn:nbn:se:kth:diva-5999 (URN)
Note
QS 20120316Available from: 2006-06-14 Created: 2006-06-14 Last updated: 2012-03-16Bibliographically approved

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CiteExportLink to record
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Citation style
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