Title:	Interpatient respiratory motion model transfer for virtual reality simulations of liver punctures
Authors:	Mastmeyer, Andre Wilms, Matthias Handels, Heinz
Citation:	Journal of WSCG. 2017, vol. 25, no. 1, p. 1-9.
Issue Date:	2017
Publisher:	Václav Skala - UNION Agency
Document type:	článek article
URI:	wscg.zcu.cz/WSCG2017/!_2017_Journal_WSCG-No-1.pdf http://hdl.handle.net/11025/26275
ISSN:	1213-6972 (print) 1213-6980 (CD-ROM) 1213-6964 (on-line)
Keywords:	virtuální realita;instruktáž punkce jater;4D model pohybu;registrace mezi pacienty
Keywords in different language:	virtual reality;liver puncture training;4D motion models;inter-patient registration
Abstract in different language:	Current virtual reality (VR) training simulators of liver punctures often rely on static 3D patient data and use an unrealistic (sinusoidal) periodic animation of the respiratory movement. Existing methods for the animation of breathing motion support simple mathematical or patient-specific, estimated breathing models. However with personalized breathing models for each new patient, a heavily dose relevant or expensive 4D data acquisition is mandatory for keyframe-based motion modeling. Given the reference 4D data, first a model building stage using linear regression motion field modeling takes place. Then the methodology shown here allows the transfer of existing reference respiratory motion models of a 4D reference patient to a new static 3D patient. This goal is achieved by using non-linear inter-patient registration to warp one personalized 4D motion field model to new 3D patient data. This cost- and dose-saving new method is shown here visually in a qualitative proof-of-concept study.
Rights:	© Václav Skala - UNION Agency
Appears in Collections:	Volume 25, Number 1 (2017)

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