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You searched for +publisher:"Vanderbilt University" +contributor:("Dr. Robert J. Webster III"). Showing records 1 – 2 of 2 total matches.

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Vanderbilt University

1. Reda, Fitsum Aklilu. Automatic Segmentation of Structures and Registration of CT Images for Image-Guided Otologic Surgery and Implant Programming.

Degree: PhD, Electrical Engineering, 2014, Vanderbilt University

A cochlear implant (CI) is a neural prosthetic device that restores hearing by directly stimulating the auditory nerve using an electrode array surgically placed in the cochlea. Conventional CI implantation techniques require major excavation of the skull to achieve access and place an electrode array into the cochlea. After placement, CIs are typically programmed to attempt to optimize hearing outcome. Recently, image-guidance has been proposed to minimize the invasiveness of conventional CI surgery techniques as well as to design new strategies to improve CI programming outcomes. These image-guided techniques necessitate the automatic segmentation of the structures of the ear in pre- or post-implantation CTs, or the automatic registration of pre- and intra-implantation CTs. The structures of the ear include the facial nerve, the chorda tympani, the labyrinth, the ear canal, the tympani membrane, the ossicles, and the inner ear structures, which include the scala tympani, the scala vestibuli and the spiral ganglion. In this dissertation, we present a set of innovative image processing techniques we have developed to achieve the necessary segmentation or registration tasks. The set of techniques includes methods for automatic segmentation of the structures of the ear in pediatric pre-implantation CT, a new pose-invariant pre- to intra-implantation CT registration method, new algorithms for automatic segmentation of the inner ear structures in post-unilateral-implantation CT, and novel shape library-based algorithms for automatic segmentation of the inner ear structures in post-bilateral-implantation CT. All these techniques have been validated both qualitatively, by experts in ear anatomy, and quantitatively, by comparing the results they produce to expert generated results. Advisors/Committee Members: Dr. J. Michael Fitzpatrick (committee member), Dr. Robert F. Labadie (committee member), Dr. Jack H. Noble (committee member), Dr. Robert J. Webster III (committee member), Dr. Benoit M. Dawant (Committee Chair).

Subjects/Keywords: Image Segmentation; Image Registration; Statistical Shape Models; Surface-to-Image Registration; Shape Alignment; Cochlear Imaplnt; Cochlear Implant Surgery; Cochlear Implant Programming; CT; Ear; Minimally-invasive Surgery

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Reda, F. A. (2014). Automatic Segmentation of Structures and Registration of CT Images for Image-Guided Otologic Surgery and Implant Programming. (Doctoral Dissertation). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/11124

Chicago Manual of Style (16th Edition):

Reda, Fitsum Aklilu. “Automatic Segmentation of Structures and Registration of CT Images for Image-Guided Otologic Surgery and Implant Programming.” 2014. Doctoral Dissertation, Vanderbilt University. Accessed December 02, 2020. http://hdl.handle.net/1803/11124.

MLA Handbook (7th Edition):

Reda, Fitsum Aklilu. “Automatic Segmentation of Structures and Registration of CT Images for Image-Guided Otologic Surgery and Implant Programming.” 2014. Web. 02 Dec 2020.

Vancouver:

Reda FA. Automatic Segmentation of Structures and Registration of CT Images for Image-Guided Otologic Surgery and Implant Programming. [Internet] [Doctoral dissertation]. Vanderbilt University; 2014. [cited 2020 Dec 02]. Available from: http://hdl.handle.net/1803/11124.

Council of Science Editors:

Reda FA. Automatic Segmentation of Structures and Registration of CT Images for Image-Guided Otologic Surgery and Implant Programming. [Doctoral Dissertation]. Vanderbilt University; 2014. Available from: http://hdl.handle.net/1803/11124


Vanderbilt University

2. Sup IV, Frank Charles. A Powered Self-Contained Knee and Ankle Prosthesis for Near Normal Gait in Transfemoral Amputees.

Degree: PhD, Mechanical Engineering, 2009, Vanderbilt University

The human leg serves as the primary mechanism to provide locomotion and general mobility, both of which require significant power generation at the joints. Today, commercial lower limb prostheses are generally passive devices capable of only dissipating or storing energy. Amputees must adapt their gait and mobility patterns to compensate for this lack of power. The hypothesis of this work postulates that restoring power to the knee and ankle joints can positively affect gait and increase the ease of mobility in above knee amputees. Described herein is the development of an electrically powered knee and ankle prosthesis intended to restore normal locomotive function to above knee amputees. Initial work focused on a tethered prototype with off-board power and computation to investigate electrical power requirements of such a device. Findings indicated that a device could be fabricated with an acceptable operating weight and range, though limited. Based on this work, a self-contained electrically powered knee and ankle prosthesis was developed. The design specifications, mechanical and electrical designs, control architecture for the self-contained version are described. Experimental results testing the device on an above knee amputee demonstrate the devices merit in restoring biomechanically normal gait patterns, assistive sit to stand transitions and powered slope ascent. Advisors/Committee Members: Dr. Nilanjan Sarkar (committee member), Dr. George E. Cook (committee member), Dr. Robert J. Webster III (committee member), Dr. Eric J. Barth (committee member), Dr. Michael Goldfarb (Committee Chair).

Subjects/Keywords: Intent Recognition; Impedance Control; Amputee Gait; Powered Prosthesis

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Sup IV, F. C. (2009). A Powered Self-Contained Knee and Ankle Prosthesis for Near Normal Gait in Transfemoral Amputees. (Doctoral Dissertation). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/13427

Chicago Manual of Style (16th Edition):

Sup IV, Frank Charles. “A Powered Self-Contained Knee and Ankle Prosthesis for Near Normal Gait in Transfemoral Amputees.” 2009. Doctoral Dissertation, Vanderbilt University. Accessed December 02, 2020. http://hdl.handle.net/1803/13427.

MLA Handbook (7th Edition):

Sup IV, Frank Charles. “A Powered Self-Contained Knee and Ankle Prosthesis for Near Normal Gait in Transfemoral Amputees.” 2009. Web. 02 Dec 2020.

Vancouver:

Sup IV FC. A Powered Self-Contained Knee and Ankle Prosthesis for Near Normal Gait in Transfemoral Amputees. [Internet] [Doctoral dissertation]. Vanderbilt University; 2009. [cited 2020 Dec 02]. Available from: http://hdl.handle.net/1803/13427.

Council of Science Editors:

Sup IV FC. A Powered Self-Contained Knee and Ankle Prosthesis for Near Normal Gait in Transfemoral Amputees. [Doctoral Dissertation]. Vanderbilt University; 2009. Available from: http://hdl.handle.net/1803/13427

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