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Existing methods are limited in accuracy and provide single\u2010frequency results. Furthermore, accurate knowledge of dielectric properties becomes more important, since medical device design and safety evaluation increasingly rely on computational modeling\u2010based evaluation.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Tissue composition assessment was performed to find the most important factors for the dielectric properties, which were sodium, potassium, and water. These were measured with a 3D acquisition\u2010weighted density\u2010adapted stack\u2010of\u2010stars scheme (Na and K) and an inversion recovery turbo spin echo sequence (H). Measurements were conducted in muscle\u2010representative phantoms and six healthy volunteers. These measurements were used as input for mixture models, which were used to correlate the dielectric properties of the mixture with its constituents. Four different mixture models were tested to assess the feasibility of this method.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>With the Maxwell\u2013Garnett mixture model, a 7.9% error in the real relative permittivity and a 4.0% error in the effective conductivity are found for the phantoms. The in vivo values are in a similar range to those reported in literature.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>We presented the feasibility of estimating dielectric properties over a wide frequency band with quantitative MRI, leading to a new method: HNaK\u2010TiCEPT. A discrepancy can be observed in the 50\u2013200 MHz range, but the data aligns with literature from 200\u2013600 MHz. These results show substantial intersubject differences in effective conductivity (29%), supporting the need for an accurate method to provide in vivo dielectric tissue properties.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/mrm.70139","type":"journal-article","created":{"date-parts":[[2025,10,24]],"date-time":"2025-10-24T08:59:23Z","timestamp":1761296363000},"page":"1503-1512","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Ticept: Wideband Electrical Properties Tomography by Tissue Composition Assessment With Quantitative \u20091$$ {}^1 $$H\u200923$$ {}^{23} $$Na\u200939$$ {}^{39} $$K Multinuclear MRI"],"prefix":"10.1002","volume":"95","author":[{"ORCID":"https:\/\/orcid.org\/0009-0003-8221-0465","authenticated-orcid":false,"given":"Laura J. 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