Assessment of bone ingrowth in titanium implants using MARS spectral CT.

Type of content
Theses / Dissertations
Publisher's DOI/URI
Thesis discipline
Medical Physics
Degree name
Master of Science
Publisher
University of Canterbury
Journal Title
Journal ISSN
Volume Title
Language
English
Date
2018
Authors
Dalefield, Tara
Abstract

The MARS scanner is a type of computed tomography scanner that uses a wider range of energies than conventional machines, partitioning the range of photon en- ergies into bins. With this advantage, it has many potential uses, one of them being an assessment tool of ingrowth into porous titanium implants, used in the treatment of bone fractures as well as osteodegenerative conditions. If it is successful in this regard, the MARS scanner could become a less invasive form of assessment than the current use of histology.

In order to utilise the MARS scanner’s abilities, it is necessary to understand what makes for ideal scanning conditions. This includes study into the effects of different filters, energy bins, voxel size, tube current, and the number of projections. All of these are covered in this thesis, as well as investigation in what effect, if any, a minor camera tangential offset or density of the material submerging the scaffold could have.

This work was confounded by the presence of a metal artefact caused by the scaffold itself, yet a suitable set of parameters was obtained to reduce the incident of the arte- fact. Experimentation into the effects of tangential offset and submerging material found them to have an insignificant effect.

This thesis may contribute to the goals of the MARS team, and to the advancement of the field of medical imaging. In the short term, this is carried out as a demon- stration of my own abilities to learn and research. It is hoped that this work will contribute to all of these stated goals.

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Ngā upoko tukutuku/Māori subject headings
ANZSRC fields of research
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