Academic Journal
A Magnetic Resonance-Compatible Fiberoptic Temperature Sensor for Measuring Focused Ultrasound-Induced Heating Without Artifacts.
| Τίτλος: | A Magnetic Resonance-Compatible Fiberoptic Temperature Sensor for Measuring Focused Ultrasound-Induced Heating Without Artifacts. |
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| Συγγραφείς: | Johnson SL; Radiology & Imaging Sciences, University of Utah, Salt Lake City, UT, USA., Odéen H; Radiology & Imaging Sciences, University of Utah, Salt Lake City, UT, USA., Vine H; OSENSA Innovations, Burnaby BC, Canada., Guenkawa P; Biomedical Engineering, University of Utah, Salt Lake City, UT, USA., Nelson B; School of Computing, University of Utah, Salt Lake City, UT, USA., Payne A; Radiology & Imaging Sciences, University of Utah, Salt Lake City, UT, USA. Electronic address: allison.payne@hsc.utah.edu. |
| Πηγή: | Ultrasound in medicine & biology [Ultrasound Med Biol] 2026 Aug; Vol. 52 (8), pp. 1664-1670. Date of Electronic Publication: 2026 May 15. |
| Τύπος έκδοσης: | Journal Article |
| Γλώσσα: | English |
| Στοιχεία περιοδικού: | Publisher: Pergamon Press Country of Publication: England NLM ID: 0410553 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-291X (Electronic) Linking ISSN: 03015629 NLM ISO Abbreviation: Ultrasound Med Biol Subsets: MEDLINE |
| Imprint Name(s): | Original Publication: Oxford, New York, Pergamon Press. |
| Ιατρικοί όροι (MeSH): | Magnetic Resonance Imaging*/instrumentation , Fiber Optic Technology*/instrumentation , High-Intensity Focused Ultrasound Ablation*, Phantoms, Imaging ; Equipment Design ; Artifacts ; Hot Temperature |
| Περίληψη: | Objective: This work evaluated a fiberoptic probe that meets all features and qualities that render it highly suitable for validating magnetic resonance temperature imaging measurements for magnetic resonance-guided focused ultrasound (MRgFUS) applications. The fiberoptic probe performance was compared with other probes with viscous heating artifact (VHA) effects in both a free-field and a controlled tissue-mimicking phantom environment with MRgFUS heating applied. Methods: Three fiberoptic probes with different coatings (nylon, ethylene tetrafluoroethylene and polyimide) and tip diameters (1, 0.75 and 0.14 mm) were evaluated in free-field and tissue-mimicking phantom environments at 1 and 3 MHz under a variety of acoustic intensity and probe incidence angles with respect to the acoustic field. Concurrently acquired temperature measurements from the fiberoptic probes and magnetic resonance temperature imaging were compared, with Bland-Altman analysis also performed. Results: The 0.14 mm diameter fiberoptic probe composed of a glass optical fiber and ethylene tetrafluoroethylene coating had negligible VHAs under all acoustic exposure conditions. Comparison of the magnetic resonance temperature imaging and fiberoptic temperature data resulted in a root mean squared error of 0.52°C and 0.47°C and a limit of agreement of 1.2°C and 1.0°C when tested in a 1 and 3 MHz acoustic field, respectively. This contrasts with the results from a 1 mm-diameter fiberoptic probe composed of a polymer optical fiber with a nylon coating that demonstrated a root mean squared error and limit of agreement of 15°C and 3.5°C, and 37°C and 7.5°C at 1 and 3 MHz, respectively. Conclusion: The thin-diameter (0.14 mm) glass fiberoptic probe monitored focused ultrasound-induced heating in the acoustic field without evidence of a VHA. The ability to perform calibration and accuracy studies in an active acoustic field will broaden the range of testing allowed, improving the calibration range of magnetic resonance imaging temperature sequences. (Copyright © 2026 The Authors. Published by Elsevier Inc. All rights reserved.) |
| Competing Interests: | Conflict of interest H.V. is an employee of OSENSA Innovations. All other authors declare no conflict of interest. |
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| Grant Information: | R01 CA259686 United States CA NCI NIH HHS; R37 CA224141 United States CA NCI NIH HHS; S10 OD018482 United States OD NIH HHS |
| Contributed Indexing: | Keywords: Fiberoptic temperature probes; Focused ultrasound; MR thermometry; MRI temperature imaging; Temperature measurement validation |
| Entry Date(s): | Date Created: 20260515 Date Completed: 20260623 Latest Revision: 20260813 |
| Update Code: | 20260813 |
| PubMed Central ID: | PMC13339831 |
| DOI: | 10.1016/j.ultrasmedbio.2026.04.014 |
| PMID: | 42140831 |
| Βάση Δεδομένων: | MEDLINE |
| ISSN: | 1879-291X |
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| DOI: | 10.1016/j.ultrasmedbio.2026.04.014 |