Show simple item record

dc.contributor.advisorJohanson, Robert Een_US
dc.contributor.advisorKasap, Safa Oen_US
dc.creatorMeyer, Thomas Johanen_US
dc.date.accessioned2010-04-16T15:15:04Zen_US
dc.date.accessioned2013-01-04T04:29:26Z
dc.date.available2011-04-19T08:00:00Zen_US
dc.date.available2013-01-04T04:29:26Z
dc.date.created2010-04en_US
dc.date.issued2010-04en_US
dc.date.submittedApril 2010en_US
dc.identifier.urihttp://hdl.handle.net/10388/etd-04162010-151504en_US
dc.description.abstractX-ray medical imaging provides invaluable medical information, while subjecting patients to hazardous ionizing radiation. The dosage that the patient is exposed to may be reduced, at the cost of image resolution. A technology that promises lower dosage for a given resolution is direct conversion digital imaging, typically based on amorphous Selenium semiconductor. Sufficient exposure should be used for the first exposure to avoid subsequent exposures; a challenge is then to reduce the necessary exposure for a suitable image. To quantify how little radiation the detector can reliably discriminate, one needs an analysis of the variance that 1/f and white noise contribute to the signal of such detectors. An important consideration is that the dark current, which varies with time, is subtracted from the photo-current, to reduce the spurious spatial variance in the image. In this thesis, the variance that 1/f noise contributes to integrating detectors is analysed, for a very general integrating detector. Experiments were performed to verify the theoretical results obtained for the 1/f noise variance contribution.en_US
dc.language.isoen_USen_US
dc.subjectCDSen_US
dc.subjectX-ray imagingen_US
dc.subject1/f noiseen_US
dc.titleContribution of noise to the variance of integrating detectorsen_US
thesis.degree.departmentElectrical Engineeringen_US
thesis.degree.disciplineElectrical Engineeringen_US
thesis.degree.grantorUniversity of Saskatchewanen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Science (M.Sc.)en_US
dc.type.materialtexten_US
dc.type.genreThesisen_US
dc.contributor.committeeMemberDegenstein, Dougen_US
dc.contributor.committeeMemberDinh, Anh vanen_US
dc.contributor.committeeMemberChen, Lien_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record