{"id":{"repo_id":"uwo","oai_identifier":"oai:uwo.scholaris.ca:20.500.14721/27387"},"canonical_url":"https://search.dev.ndltd.org/etd/uwo/oai:uwo.scholaris.ca:20.500.14721/27387","repository":{"repo_id":"uwo","name":"Western University","base_url":"https://uwo.scholaris.ca/server/oai/request"},"display":{"title":"Coherent Scatter Computed Tomography for Core Composition Analysis of Intact Kidney Stones - Prospective Clinical Study","abstract":"Urolithiasis is the presence of urinary calculi (urinary stones) at any level along the excretory system. Establishing accurate and complete mineral composition of the stones is one of the main factors in deciding the best steps for therapy and recurrence prevention. Currently, infrared spectroscopy (IRS) and x-ray diffractometry (XRD) provide bulk composition results of urinary calculi in powdered form. Clinicians use the results to prescribe medical and dietary measures to restore the physiologic chemical balance of urine or rather alter it for the purpose of decreasing the crystallization rate of single or multiple minerals. As current methods have been shown reliable from a clinical perspective, they may also be, due to sampling bias, prone to missing the core components from the analysis. This work shows that coherent scatter computed tomography (CSCT) is a composition-imaging, laboratory method able to provide both composition analysis of intact calculi and a distribution map of minerals within the stone, including its core and the surrounding layers. Aspects related to CSCT’s measurement uncertainties, CSCT’s analysis of kidney stones in both intact and pulverized forms and the summarized conclusions of a comparison study between CSCT and IRS are presented. With this new knowledge clinicians may choose to employ a core-targeted prevention plan in the management of urolithiasis to further decrease the recurrence rate in these patients.","abstract_html":"Urolithiasis is the presence of urinary calculi (urinary stones) at any level along the excretory system. Establishing accurate and complete mineral composition of the stones is one of the main factors in deciding the best steps for therapy and recurrence prevention. Currently, infrared spectroscopy (IRS) and x-ray diffractometry (XRD) provide bulk composition results of urinary calculi in powdered form. Clinicians use the results to prescribe medical and dietary measures to restore the physiologic chemical balance of urine or rather alter it for the purpose of decreasing the crystallization rate of single or multiple minerals. As current methods have been shown reliable from a clinical perspective, they may also be, due to sampling bias, prone to missing the core components from the analysis. This work shows that coherent scatter computed tomography (CSCT) is a composition-imaging, laboratory method able to provide both composition analysis of intact calculi and a distribution map of minerals within the stone, including its core and the surrounding layers. Aspects related to CSCT’s measurement uncertainties, CSCT’s analysis of kidney stones in both intact and pulverized forms and the summarized conclusions of a comparison study between CSCT and IRS are presented. With this new knowledge clinicians may choose to employ a core-targeted prevention plan in the management of urolithiasis to further decrease the recurrence rate in these patients.","abstract_has_math":false,"creators":["Dihel, Cristian"],"institution":"The University of Western Ontario","degree_name":"M Sc","degree_level":null,"degree_discipline":"Medical Biophysics","degree_department":null,"school":null,"contributors":[],"advisors":["Cunningham, Ian A."],"committee_chairs":[],"committee_members":[],"year":2012,"date_issued":"2012-04-26","date_published":"2012-04-26","updated_at":"2026-07-27T21:55:59Z","subjects":["urinary stone disease","coherent scatter computed tomography","medical imaging","x-ray imaging"],"languages":["en_ca"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/20.500.14721/27387","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Cunningham, Ian A."]},{"key":"dc:creator","label":"Author","values":["Dihel, Cristian"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2025-07-10T15:29:34Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2025-07-10T15:29:34Z"]},{"key":"dc:date.issued","label":"Date","values":["2012-04-26"]},{"key":"dc:publisher","label":"Institution","values":["The University of Western Ontario"]},{"key":"dc:type","label":"Dc Type","values":["thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Medical Biophysics"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M Sc"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["urinary stone disease","coherent scatter computed tomography","medical imaging","x-ray imaging"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en_ca"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/20.500.14721/27387"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The thesis cover page in the PDF document includes references to Western University’s previous institutional repository platform, known as Scholarship@Western, and links to that platform (beginning with ir.lib.uwo.ca). In citing or referring to this thesis, use the DOI or handle from this page instead. Sample citation: Author name, \"Thesis title.\" (Year). Western University Open Repository. https://doi.org/10.71858/123456."]},{"key":"dc:description.abstract","label":"Abstract","values":["Urolithiasis is the presence of urinary calculi (urinary stones) at any level along the excretory system. Establishing accurate and complete mineral composition of the stones is one of the main factors in deciding the best steps for therapy and recurrence prevention. Currently, infrared spectroscopy (IRS) and x-ray diffractometry (XRD) provide bulk composition results of urinary calculi in powdered form. Clinicians use the results to prescribe medical and dietary measures to restore the physiologic chemical balance of urine or rather alter it for the purpose of decreasing the crystallization rate of single or multiple minerals. As current methods have been shown reliable from a clinical perspective, they may also be, due to sampling bias, prone to missing the core components from the analysis. This work shows that coherent scatter computed tomography (CSCT) is a composition-imaging, laboratory method able to provide both composition analysis of intact calculi and a distribution map of minerals within the stone, including its core and the surrounding layers. Aspects related to CSCT’s measurement uncertainties, CSCT’s analysis of kidney stones in both intact and pulverized forms and the summarized conclusions of a comparison study between CSCT and IRS are presented. With this new knowledge clinicians may choose to employ a core-targeted prevention plan in the management of urolithiasis to further decrease the recurrence rate in these patients."]},{"key":"dc:title","label":"Title","values":["Coherent Scatter Computed Tomography for Core Composition Analysis of Intact Kidney Stones - Prospective Clinical Study"]}]}],"canonical_facts":{"dc:contributor.advisor":["Cunningham, Ian A."],"dc:creator":["Dihel, Cristian"],"dc:date.accessioned":["2025-07-10T15:29:34Z"],"dc:date.available":["2025-07-10T15:29:34Z"],"dc:date.issued":["2012-04-26"],"dc:description":["The thesis cover page in the PDF document includes references to Western University’s previous institutional repository platform, known as Scholarship@Western, and links to that platform (beginning with ir.lib.uwo.ca). In citing or referring to this thesis, use the DOI or handle from this page instead. Sample citation: Author name, \"Thesis title.\" (Year). 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This work shows that coherent scatter computed tomography (CSCT) is a composition-imaging, laboratory method able to provide both composition analysis of intact calculi and a distribution map of minerals within the stone, including its core and the surrounding layers. Aspects related to CSCT’s measurement uncertainties, CSCT’s analysis of kidney stones in both intact and pulverized forms and the summarized conclusions of a comparison study between CSCT and IRS are presented. 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