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To validate an analytical method for quantifying both CBF and myelin content in the WM using dynamic [<jats:sup>11<\/jats:sup>C]PiB positron emission tomography (PET).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>A test-retest study was performed on eight healthy subjects who underwent two consecutive dynamic [11\u00a0C]PiB-PET scans. Three quantitative approaches were compared: simplified reference tissue model 2 (SRTM2), LOGAN graphical model, and standardized uptake value ratio (SUVR). The sensitivity of methods to the size of the region of interest was explored by simulating lesion masks obtained from 36 subjects with multiple sclerosis. Reproducibility was assessed using the relative difference and interclass correlation coefficient. Repeated measures correlations were used to test for cross-correlations between metrics.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>Among the CBF measures, the relative delivery (R1) of the simplified reference tissue model 2 (SRTM2) displayed the best reproducibility in the white matter, with a strong influence of the size of regions analyzed, the test-retest variability being below 10% for regions above 68 mm<jats:sup>3<\/jats:sup> in the supratentorial white matter. [<jats:sup>11<\/jats:sup>C]PiB PET-derived proxies of CBF demonstrated lower perfusion of white matter compared to grey matter with an overall ratio equal to 1.71\u2009\u00b1\u20090.09 when the SRTM2-R1 was employed. Tissue binding in the white matter was well estimated by the Logan graphical model through estimation of the distribution volume ratio (LOGAN-DVR) and SRTM2 distribution volume ratio (SRTM2-DVR), with test-retest variability being below 10% for regions exceeding 106 mm<jats:sup>3<\/jats:sup> for LOGAN-DVR and 300 mm<jats:sup>3<\/jats:sup> for SRTM2-DVR. SRTM2-DVR provided a better contrast between white matter and grey matter. The interhemispheric variability was also dependent on the size of the region analyzed, being below 10% for regions above 103 mm<jats:sup>3<\/jats:sup> for SRTM2-R1 and above 110 mm<jats:sup>3<\/jats:sup> for LOGAN-DVR. Whereas the 1 to 8-minute standardized uptake value ratio (SUVR1-8) showed an intermediary reproducibility for CBF assessment, SUVR0-2 for perfusion or SUVR50-70 for tissue binding showed poor reproducibility and correlated only mildly with SRTM2-R1 and LOGAN-DVR estimations respectively.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusions<\/jats:title>\n                <jats:p>[<jats:sup>11<\/jats:sup>C]PiB PET imaging can simultaneously quantify perfusion and myelin content in WM diseases associated with focal lesions. For longitudinal studies, SRTM2-R1 and DVR should be preferred over SUVR for the assessment of regional CBF and myelin content, respectively.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Trial registration<\/jats:title>\n                <jats:p>European Union Clinical Trials Register EUDRACT; EudraCT Number: 2008-004174-40; Date: 2009-03-06; <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.clinicaltrialsregister.eu\">https\/\/www.clinicaltrialsregister.eu<\/jats:ext-link>; number 2008-004174-40.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s13550-024-01107-4","type":"journal-article","created":{"date-parts":[[2024,5,27]],"date-time":"2024-05-27T14:04:33Z","timestamp":1716818673000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Simultaneous assessment of blood flow and myelin content in the brain white matter with dynamic [11\u00a0C]PiB PET: a test-retest study in healthy controls"],"prefix":"10.1186","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8389-4892","authenticated-orcid":false,"given":"Arya","family":"Yazdan-Panah","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8010-1220","authenticated-orcid":false,"given":"Benedetta","family":"Bodini","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-4726-493X","authenticated-orcid":false,"given":"Th\u00e9odore","family":"Soulier","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3562-0683","authenticated-orcid":false,"given":"Mattia","family":"Veronese","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2890-3653","authenticated-orcid":false,"given":"Michel","family":"Bottlaender","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9591-5710","authenticated-orcid":false,"given":"Matteo","family":"Tonietto","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9631-4674","authenticated-orcid":false,"given":"Bruno","family":"Stankoff","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,5,27]]},"reference":[{"key":"1107_CR1","doi-asserted-by":"publisher","first-page":"883","DOI":"10.1016\/j.neuron.2015.03.035","volume":"86","author":"PJ Magistretti","year":"2015","unstructured":"Magistretti PJ, Allaman I. 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