{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,9]],"date-time":"2026-09-09T17:06:21Z","timestamp":1788973581950,"version":"build-2803163510"},"reference-count":45,"publisher":"Optica Publishing Group","issue":"10","license":[{"start":{"date-parts":[[2026,9,9]],"date-time":"2026-09-09T00:00:00Z","timestamp":1788912000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/doi.org\/10.1364\/OA_License_v2#VOR-OA"},{"start":{"date-parts":[[2026,9,9]],"date-time":"2026-09-09T00:00:00Z","timestamp":1788912000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/opg.optica.org\/policies\/opg-tdm-policy.json"}],"funder":[{"DOI":"10.13039\/501100002347","name":"Federal Ministry of Research, Technology and Space","doi-asserted-by":"crossref","award":["BMFTR, project insitu, FKZ: 13GW0775C"],"award-info":[{"award-number":["BMFTR, project insitu, FKZ: 13GW0775C"]}],"id":[{"id":"10.13039\/501100002347","id-type":"DOI","asserted-by":"crossref"},{"id":"https:\/\/ror.org\/04pz7b180","id-type":"ROR","asserted-by":"publisher"}]},{"name":"University of Augsburg","award":["COHYPERA"],"award-info":[{"award-number":["COHYPERA"]}],"id":[{"id":"https:\/\/ror.org\/03p14d497","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":["opg.optica.org"],"crossmark-restriction":false},"short-container-title":["Biomed. Opt. Express"],"published-print":{"date-parts":[[2026,10,1]]},"abstract":"<jats:p>\n                    This work explores the hyperspectral characteristics of imaging photoplethysmography (iPPG) to (1) deepen the understanding of iPPG signals\u2019 origin, and (2) assess iPPG\u2019s capacity to capture the peripheral perfusion. Our analyses are based on an experimental study employing a hyperspectral snapshot camera for iPPG and laser speckle contrast imaging (LSCI) at the forearm. We demonstrate a pronounced correlation between the wavelength-dependent normalized AC component from iPPG and the extinction coefficient of oxyhemoglobin (\n                    <jats:italic>r<\/jats:italic>\n                    \u2009=\u20090.975). Further, we show iPPG\u2019s ability to explain LSCI (linear mixed models\u2019\n                    <jats:italic>\u03b2<\/jats:italic>\n                    up to 0.692). Considering the entire optical spectrum, our results support blood volume changes as a dominant factor for iPPG signals\u2019 generation and demonstrate iPPG\u2019s capacity to monitor peripheral perfusion.\n                  <\/jats:p>","DOI":"10.1364\/boe.605828","type":"journal-article","created":{"date-parts":[[2026,7,27]],"date-time":"2026-07-27T10:00:10Z","timestamp":1785146410000},"page":"5062","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Hyperspectral imaging photoplethysmography: insights into the signals\u2019 origin and usage"],"prefix":"10.1364","volume":"17","author":[{"given":"Tobias","family":"Vogelsang","sequence":"first","affiliation":[{"name":"University of Augsburg"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vincent","family":"Fleischhauer","sequence":"additional","affiliation":[{"name":"University of Augsburg"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alexander","family":"Woyczyk","sequence":"additional","affiliation":[{"name":"University of Augsburg"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael","family":"Wellnhofer","sequence":"additional","affiliation":[{"name":"University of Augsburg"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stefan","family":"Rasche","sequence":"additional","affiliation":[{"name":"Technische Universit\u00e4t Dresden \/ University Hospital Carl Gustav Carus Dresden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6114-3142","authenticated-orcid":true,"given":"Sebastian","family":"Zaunseder","sequence":"additional","affiliation":[{"name":"University of Augsburg"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2026,9,9]]},"reference":[{"key":"boe-17-10-5062-R1","doi-asserted-by":"publisher","first-page":"1","DOI":"10.1145\/3558518","type":"journal-article","volume":"55","author":"McDuff","year":"2023","journal-title":"ACM Comput. 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