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We systematically evaluate RF-induced heating of commonly used intravascular devices at the Larmor frequency of a 0.55\u00a0T system (23.66\u00a0MHz) with a focus on the effect of patient size, target organ, and device position on maximum temperature rise.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Materials and methods<\/jats:title>\n                <jats:p>To assess RF-induced heating, high-resolution measurements of the electric field, temperature, and transfer function were combined. Realistic device trajectories were derived from vascular models to evaluate the variation of the temperature increase as a function of the device trajectory. At a low-field RF test bench, the effects of patient size and positioning, target organ (liver and heart) and body coil type were measured for six commonly used interventional devices (two guidewires, two catheters, an applicator and a biopsy needle).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>Electric field mapping shows that the hotspots are not necessarily localized at the device tip. Of all procedures, the liver catheterizations showed the lowest heating, and a modification of the transmit body coil could further reduce the temperature increase. For common commercial needles no significant heating was measured at the needle tip. Comparable local SAR values were found in the temperature measurements and the TF-based calculations.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>At low fields, interventions with shorter insertion lengths such as hepatic catheterizations result in less RF-induced heating than coronary interventions. The maximum temperature increase depends on body coil design.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1007\/s10334-023-01099-7","type":"journal-article","created":{"date-parts":[[2023,5,17]],"date-time":"2023-05-17T09:03:38Z","timestamp":1684314218000},"page":"439-449","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["RF-induced heating of interventional devices at 23.66\u00a0MHz"],"prefix":"10.1007","volume":"36","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3536-0826","authenticated-orcid":false,"given":"Ali Caglar","family":"\u00d6zen","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maximilian Frederik","family":"Russe","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas","family":"Lottner","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Simon","family":"Reiss","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sebastian","family":"Littin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maxim","family":"Zaitsev","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael","family":"Bock","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2023,5,17]]},"reference":[{"issue":"4","key":"1099_CR1","doi-asserted-by":"publisher","first-page":"590","DOI":"10.1002\/1522-2586(200010)12:4<590::AID-JMRI11>3.0.CO;2-3","volume":"12","author":"J-M Serfaty","year":"2000","unstructured":"Serfaty J-M, Yang X, Aksit P, Quick HH, Solaiyappan M, Atalar E (2000) Toward MRI-guided coronary catheterization: Visualization of guiding catheters, guidewires, and anatomy in real time. 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