Thoracic wall reconstruction using ultrasound images to model/bend the thoracic...

• Author(s): Fonseca, João ; Moreira, António H. J. ; Rodrigues, Pedro L. ; Fonseca, Jaime C. ; Pinho, A. C. Marques de ; Rodrigues, Nuno F. ; Pinto, Jorge Correia ; Vilaça, João L.
• Date: 2012
• Persistent ID: http://hdl.handle.net/1822/18526
• Origin: RepositóriUM - Universidade do Minho
• Subject(s): CT-scan; Pectus excavatum; Personalization; Reconstruction; Ultrasound
• Document Type: Conference Object
• Language: English

Description

Pectus excavatum is the most common congenital deformity of the anterior thoracic wall. The surgical correction of such deformity, using Nuss procedure, consists in the placement of a personalized convex prosthesis into sub-sternal position to correct the deformity. The aim of this work is the CT-scan substitution by ultrasound imaging for the pre-operative diagnosis and pre-modeling of the prosthesis, in order to avoid patient radiation exposure. To accomplish this, ultrasound images are acquired along an axial plane, followed by a rigid registration method to obtain the spatial transformation between subsequent images. These images are overlapped to reconstruct an axial plane equivalent to a CT-slice. A phantom was used to conduct preliminary experiments and the achieved results were compared with the corresponding CT-data, showing that the proposed methodology can be capable to create a valid approximation of the anterior thoracic wall, which can be used to model/bend the prosthesis.