Factors Affecting Image Quality in Near-field Ultra-wideband Radar Imaging for Biomedical Applications
| atmire.migration.oldid | 3477 | |
| dc.contributor.advisor | Fear, Elise | |
| dc.contributor.author | Curtis, Charlotte | |
| dc.date.accessioned | 2015-09-01T15:02:08Z | |
| dc.date.available | 2015-11-20T08:00:37Z | |
| dc.date.issued | 2015-09-01 | |
| dc.date.submitted | 2015 | en |
| dc.description.abstract | Near-field ultra-wideband radar imaging has potential as a new breast imaging modality. While a number of reconstruction algorithms have been published with the goal of reducing undesired responses or clutter, an in-depth analysis of the dominant sources of clutter has not been conducted. In this thesis, time domain radar image reconstruction is demonstrated to be equivalent to frequency domain synthetic aperture radar. This reveals several assumptions inherent to the reconstruction algorithm related to radial spreading, point source antennas, and the independent summation of point scatterers. Each of these assumptions is examined in turn to determine which has the greatest impact on the resulting image quality and interpretation. In addition, issues related to heterogeneous and dispersive media are addressed. Variations in imaging parameters are tested by observing their influence on the system point spread function. Results are then confirmed by testing on simple and detailed simulation models, followed by data acquired from human volunteers. Recommended parameters are combined into a new imaging operator that is demonstrated to generate results comparable to a more accurate signal model, but with a 50 fold improvement in computational efficiency. Finally, the most significant factor affecting image quality is determined to be the estimate of tissue properties used to form the image. | en_US |
| dc.identifier.citation | Curtis, C. (2015). Factors Affecting Image Quality in Near-field Ultra-wideband Radar Imaging for Biomedical Applications (Doctoral thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/26144 | en_US |
| dc.identifier.doi | http://dx.doi.org/10.11575/PRISM/26144 | |
| dc.identifier.uri | http://hdl.handle.net/11023/2416 | |
| dc.language.iso | eng | |
| dc.publisher.faculty | Graduate Studies | |
| dc.publisher.institution | University of Calgary | en |
| dc.publisher.place | Calgary | en |
| dc.rights | University of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission. | |
| dc.subject | Engineering--Biomedical | |
| dc.subject | Engineering--Electronics and Electrical | |
| dc.subject.classification | RADAR | en_US |
| dc.subject.classification | breast cancer | en_US |
| dc.subject.classification | Imaging | en_US |
| dc.subject.classification | Ultra-Wideband | en_US |
| dc.subject.classification | Algorithms | en_US |
| dc.title | Factors Affecting Image Quality in Near-field Ultra-wideband Radar Imaging for Biomedical Applications | |
| dc.type | doctoral thesis | |
| thesis.degree.discipline | Electrical and Computer Engineering | |
| thesis.degree.grantor | University of Calgary | |
| thesis.degree.name | Doctor of Philosophy (PhD) | |
| ucalgary.item.requestcopy | true |