On the importance of modelling organ geometry and boundary conditions for predicting three-dimensional prostate deformation

Jahya, Alex and Schouten, Martijn G. and Fütterer, Jurgen J. and Misra, Sarthak (2012) On the importance of modelling organ geometry and boundary conditions for predicting three-dimensional prostate deformation. Computer Methods in Biomechanics and Biomedical Engineering . ISSN 1025-5842

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Abstract:	The use of an ultrasound probe or a needle guide during biopsy deforms both the rectal wall and the prostate, resulting in lesion motion. An accurate patient-speciﬁc ﬁnite element (FE)-based biomechanical model can be used to predict prostate deformations. In this study, an FE model of a prostate phantom is developed using magnetic resonance images, while soft-tissue elasticity is estimated in vivo using an ultrasound-based acoustic radiation force impulse imaging technique. This study conﬁrms that three-dimensional FE-predicted prostate deformation is predominantly dependent on accurate modelling of prostate geometry and boundary conditions. Upon application of various compressive displacements, our results show that a linear elastic FE model can accurately predict prostate deformations. The maximum global error between FE-predicted simulations and experimental results is 0.76 mm. Moreover, the effect of including the urethra, puboprostatic ligament and urinary bladder on prostate deformations is investigated by a sensitivity study.
Item Type:	Article
Copyright:	© 2012 Taylor & Francis
Faculty:	Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:	Robotics and Mechatronics (CE)
Link to this item:	http://purl.utwente.nl/publications/80782
Official URL:	http://dx.doi.org/10.1080/10255842.2012.694876
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