PS-GANS: A Patient-Specific, Gravity Assisted Navigation System for Acetabular Cup Placement


Autoria(s): Zheng, Guoyan; Echeverri, Santiago; Xie, Weiguo; Nolte, Lutz-Peter
Data(s)

2011

Resumo

In this paper we propose a new system that allows reliable acetabular cup placement when the THA is operated in lateral approach. Conceptually it combines the accuracy of computer-generated patient-specific morphology information with an easy-to-use mechanical guide, which effectively uses natural gravity as the angular reference. The former is achieved by using a statistical shape model-based 2D-3D reconstruction technique that can generate a scaled, patient-specific 3D shape model of the pelvis from a single conventional anteroposterior (AP) pelvic X-ray radiograph. The reconstructed 3D shape model facilitates a reliable and accurate co-registration of the mechanical guide with the patient’s anatomy in the operating theater. We validated the accuracy of our system by conducting experiments on placing seven cups to four pelvises with different morphologies. Taking the measurements from an image-free navigation system as the ground truth, our system showed an average accuracy of 2.1 ±0.7 o for inclination and an average accuracy of 1.2 ±1.4 o for anteversion.

Formato

application/pdf

Identificador

http://boris.unibe.ch/4674/1/4674.pdf

Zheng, Guoyan; Echeverri, Santiago; Xie, Weiguo; Nolte, Lutz-Peter (2011). PS-GANS: A Patient-Specific, Gravity Assisted Navigation System for Acetabular Cup Placement. In: Information Processing in Computer-Assisted Interventions. Second International Conference, IPCAI 2011. Lecture notes in computer science: Vol. 6689 (pp. 101-112). Berlin: Springer 10.1007/978-3-642-21504-9_10 <http://dx.doi.org/10.1007/978-3-642-21504-9_10>

doi:10.7892/boris.4674

info:doi:10.1007/978-3-642-21504-9_10

urn:issn:0302-9743

urn:isbn:978-3-642-21504-9

Idioma(s)

eng

Publicador

Springer

Relação

http://boris.unibe.ch/4674/

Direitos

info:eu-repo/semantics/restrictedAccess

Fonte

Zheng, Guoyan; Echeverri, Santiago; Xie, Weiguo; Nolte, Lutz-Peter (2011). PS-GANS: A Patient-Specific, Gravity Assisted Navigation System for Acetabular Cup Placement. In: Information Processing in Computer-Assisted Interventions. Second International Conference, IPCAI 2011. Lecture notes in computer science: Vol. 6689 (pp. 101-112). Berlin: Springer 10.1007/978-3-642-21504-9_10 <http://dx.doi.org/10.1007/978-3-642-21504-9_10>

Palavras-Chave #570 Life sciences; biology #610 Medicine & health
Tipo

info:eu-repo/semantics/conferenceObject

info:eu-repo/semantics/publishedVersion

PeerReviewed