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The phantom was irradiated with 1 \u00d7 1, 3 \u00d7 3, 5 \u00d7 5, 10 \u00d7 10, and 22 \u00d7 22\u00a0cm<jats:sup>2<\/jats:sup> fields, gantry at 90\u00b0. Out\u2010of\u2010field doses (OFDs) deposited by electron streams generated at the entry and exit surface of the angled phantom were measured on the surface of solid water slabs placed\u00a0\u00b120.0\u00a0cm from the isocenter along the x\u2010direction. A high\u2010resolution MO<jats:italic>Skin<\/jats:italic>\u2122 detector served as a benchmark due to its shallower depth of measurement that matches the International Commission on Radiological Protection (ICRP) recommended depth for skin dose assessment (0.07\u00a0mm). MO<jats:italic>Skin<\/jats:italic>\u2122 doses were compared to EBT3 film, OSLDs, a diamond detector, and the TPS where the experimental setup was modeled using two separate calculation parameters settings: a 0.1\u00a0cm dose grid with 0.2% statistical uncertainty (0.1\u00a0cm, 0.2%) and a 0.2\u00a0cm dose grid with 3.0% statistical uncertainty (0.2\u00a0cm, 3.0%).<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>OSLD, film, the 0.1\u00a0cm, 0.2%, and 0.2\u00a0cm, 3.0% TPS ESE doses, underestimated skin doses measured by the MO<jats:italic>Skin<\/jats:italic>\u2122 by as much as \u201375.3%, \u20137.0%, \u201324.7%, and \u201341.9%, respectively. Film results were most similar to MO<jats:italic>Skin<\/jats:italic>\u2122 skin dose measurements.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>These results show that electron streams can deposit significant doses outside the primary field and that dosimeter choice and TPS calculation settings greatly influence the reported readings. Due to the steep dose gradient of the ESE, EBT3 film remains the choice for accurate skin dose assessment in this challenging environment.<\/jats:p><\/jats:sec>","DOI":"10.1002\/acm2.14370","type":"journal-article","created":{"date-parts":[[2024,4,25]],"date-time":"2024-04-25T11:15:25Z","timestamp":1714043725000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Electron streaming dose measurements and calculations on a 1.5 T MR\u2010Linac"],"prefix":"10.1002","volume":"25","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6240-2887","authenticated-orcid":false,"given":"Elizabeth","family":"Patterson","sequence":"first","affiliation":[{"name":"Centre for Medical and Radiation Physics University of Wollongong  Wollongong New South Wales 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