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In this study, we evaluated multiparametric mapping (MPM) as a non-invasive imaging technique for the detection of microstructural brain alterations in PD. We assessed 31 patients with idiopathic PD (PwPD) and 68 healthy controls (HCs) utilizing MPM-derived longitudinal relaxation rate (R1), effective transverse relaxation rate (R2*), proton density, and magnetic transfer saturation (MTsat). We performed a whole-brain voxel-based quantification (VBQ) and multiple linear regression analysis to assess group differences and associations with the clinical phenotype. Lower MTsat within the left superior frontal gyrus (SFG) predicted motor symptom severity in PwPD, while higher R2* values in the right SFG were associated with higher levodopa-equivalent daily dose. Higher R2* values in the posterior cingulate gyrus and lower proton density in the left superior parietal lobule were associated with a stronger cognitive impairment in PwPD. Additionally, numerous clusters presented with group differences across multiple MPM modalities, including the supplementary motor area and cingulate cortex. Overall, we successfully replicated previously documented cortical microstructural changes in PwPD, presenting MPM as a sensitive tool for the detection of disease-specific alterations. This study further underscores the utility of MPM for monitoring disease progression through biologically informed measures, opening avenues for further research.<\/jats:p>","DOI":"10.1038\/s41531-026-01329-4","type":"journal-article","created":{"date-parts":[[2026,3,31]],"date-time":"2026-03-31T16:34:51Z","timestamp":1774974891000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["In-vivo histology of Parkinson\u2019s disease using quantitative multiparametric mapping"],"prefix":"10.1038","volume":"12","author":[{"given":"Marta M.","family":"Pokotylo","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Martin","family":"G\u00f6ttlich","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Laura","family":"Schmidt","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Helena Sophia","family":"Weingarten","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lydia","family":"Dirksen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lea","family":"Albrecht","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Norman","family":"Griebner","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jan","family":"Uter","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Julia","family":"Henkel","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Norbert","family":"Br\u00fcggemann","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jannik","family":"Prasuhn","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,3,31]]},"reference":[{"key":"1329_CR1","doi-asserted-by":"publisher","first-page":"2284","DOI":"10.1016\/S0140-6736(21)00218-X","volume":"397","author":"BR Bloem","year":"2021","unstructured":"Bloem, B. 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