Keywords: stereo vision ; [VRAI] Reference LSRO2-CONF-1997-002 Record created on 2005-02-04, modi... more Keywords: stereo vision ; [VRAI] Reference LSRO2-CONF-1997-002 Record created on 2005-02-04, modified on 2017-05-10
Keywords: hip ; tracking ; positioning ; computer aided surgery ; [VRAI] Reference LSRO2-CONF-200... more Keywords: hip ; tracking ; positioning ; computer aided surgery ; [VRAI] Reference LSRO2-CONF-2003-011 Record created on 2005-02-04, modified on 2017-05-10
Keywords: hip ; tracking ; positioning ; computer aided surgery ; [VRAI] Reference LSRO2-CONF-200... more Keywords: hip ; tracking ; positioning ; computer aided surgery ; [VRAI] Reference LSRO2-CONF-2003-010 Record created on 2005-02-04, modified on 2017-05-10
Keywords: stereo vision ; [VRAI] Reference LSRO2-CONF-1998-001 Record created on 2005-02-04, modi... more Keywords: stereo vision ; [VRAI] Reference LSRO2-CONF-1998-001 Record created on 2005-02-04, modified on 2017-05-10
Le groupe VRAI, en collaboration avec l’institut de police scientifique de l’UNIL, developpe un s... more Le groupe VRAI, en collaboration avec l’institut de police scientifique de l’UNIL, developpe un scanner optique pour la digitalisation d’empreintes de chaussures. Le systeme analyse l’empreinte par projection d’un laser sur le moule en plâtre de l'empreinte realisee sur la scene d'investigation. Le spot laser est localise en 3D par un systeme de triangulation optique. La valeur retournee par ce systeme permet la creation d'un modele 3D de l'empreinte. Ce modele permettra, a terme, la comparaison automatique avec des empreintes de reference stockee dans une base de donnee.
Proceedings. 1998 IEEE/RSJ International Conference on Intelligent Robots and Systems. Innovations in Theory, Practice and Applications (Cat. No.98CH36190), 1998
Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference, 2005
In cranio-maxillofacial and in trauma surgery while making osteosynthesis the surgeons want to re... more In cranio-maxillofacial and in trauma surgery while making osteosynthesis the surgeons want to reposition bone fractures and make fixation using implants and fixations devices. These devices need to be bent during surgery or prior surgery to fit geometrical boundary conditions defined by the individual anatomy of the patient. In clinical routine, surgeons must frequently repeat several times the "bend and try" process until they get the best fitting. This process often requires up to twenty minutes for a single osteosynthesis plate. A realistic deformation algorithm is then a pre-requisite to a computer-aided planning system which aims to help surgeons to optimally pre-bend the implant in respect to an individual patient bone structure. It has been shown that computer assisted planning system for bendable implant improves the results and operation outcome: shorter operation time, more accuracy, less post-operative implant failure, etc. This paper presents our preliminary r...
We present a new contour segmentation method for femoral head detection in CT images. The princip... more We present a new contour segmentation method for femoral head detection in CT images. The principal idea underlying our approach is to represent the contour using active rays. Each ray has internal energy (continuity and smoothness constraints), as well as external energy (image-oriented edges and global a-priori knowledge). The causal nature of this representation allows a globally optimal, non-iterative solution to be found using dynamic programming. Moreover, even pathological bone structures can be automatically segmented. Several clinical situations on pelvis CT scan with hip degenerative change shows that this approach is more efficient than conventional methods. In this paper, we describe our method and discuss how it can be used to create graphical 3D models of the hip that are suitable for preoperative planning.
Keywords: stereo vision ; [VRAI] Reference LSRO2-CONF-1997-002 Record created on 2005-02-04, modi... more Keywords: stereo vision ; [VRAI] Reference LSRO2-CONF-1997-002 Record created on 2005-02-04, modified on 2017-05-10
Keywords: hip ; tracking ; positioning ; computer aided surgery ; [VRAI] Reference LSRO2-CONF-200... more Keywords: hip ; tracking ; positioning ; computer aided surgery ; [VRAI] Reference LSRO2-CONF-2003-011 Record created on 2005-02-04, modified on 2017-05-10
Keywords: hip ; tracking ; positioning ; computer aided surgery ; [VRAI] Reference LSRO2-CONF-200... more Keywords: hip ; tracking ; positioning ; computer aided surgery ; [VRAI] Reference LSRO2-CONF-2003-010 Record created on 2005-02-04, modified on 2017-05-10
Keywords: stereo vision ; [VRAI] Reference LSRO2-CONF-1998-001 Record created on 2005-02-04, modi... more Keywords: stereo vision ; [VRAI] Reference LSRO2-CONF-1998-001 Record created on 2005-02-04, modified on 2017-05-10
Le groupe VRAI, en collaboration avec l’institut de police scientifique de l’UNIL, developpe un s... more Le groupe VRAI, en collaboration avec l’institut de police scientifique de l’UNIL, developpe un scanner optique pour la digitalisation d’empreintes de chaussures. Le systeme analyse l’empreinte par projection d’un laser sur le moule en plâtre de l'empreinte realisee sur la scene d'investigation. Le spot laser est localise en 3D par un systeme de triangulation optique. La valeur retournee par ce systeme permet la creation d'un modele 3D de l'empreinte. Ce modele permettra, a terme, la comparaison automatique avec des empreintes de reference stockee dans une base de donnee.
Proceedings. 1998 IEEE/RSJ International Conference on Intelligent Robots and Systems. Innovations in Theory, Practice and Applications (Cat. No.98CH36190), 1998
Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference, 2005
In cranio-maxillofacial and in trauma surgery while making osteosynthesis the surgeons want to re... more In cranio-maxillofacial and in trauma surgery while making osteosynthesis the surgeons want to reposition bone fractures and make fixation using implants and fixations devices. These devices need to be bent during surgery or prior surgery to fit geometrical boundary conditions defined by the individual anatomy of the patient. In clinical routine, surgeons must frequently repeat several times the "bend and try" process until they get the best fitting. This process often requires up to twenty minutes for a single osteosynthesis plate. A realistic deformation algorithm is then a pre-requisite to a computer-aided planning system which aims to help surgeons to optimally pre-bend the implant in respect to an individual patient bone structure. It has been shown that computer assisted planning system for bendable implant improves the results and operation outcome: shorter operation time, more accuracy, less post-operative implant failure, etc. This paper presents our preliminary r...
We present a new contour segmentation method for femoral head detection in CT images. The princip... more We present a new contour segmentation method for femoral head detection in CT images. The principal idea underlying our approach is to represent the contour using active rays. Each ray has internal energy (continuity and smoothness constraints), as well as external energy (image-oriented edges and global a-priori knowledge). The causal nature of this representation allows a globally optimal, non-iterative solution to be found using dynamic programming. Moreover, even pathological bone structures can be automatically segmented. Several clinical situations on pelvis CT scan with hip degenerative change shows that this approach is more efficient than conventional methods. In this paper, we describe our method and discuss how it can be used to create graphical 3D models of the hip that are suitable for preoperative planning.
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