Effect of metallic materials on magnetic resonance image uniformity: a quantitative experimental study.

Autor: Shimamoto H; Department of Oral and Maxillofacial Radiology, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka, 565-0871, Japan. shimamoto.hiroaki.dent@osaka-u.ac.jp., Felemban D; Division of Oral Radiology, Department of Oral & Maxillofacial Diagnostic Sciences, College of Dentistry, Taibah University, Al Madinah Al Munawwarah, P.O. Box 2898, 43353, Madinah, Saudi Arabia., Uchimoto Y; Department of Oral and Maxillofacial Radiology, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka, 565-0871, Japan., Matsuda N; Department of Oral and Maxillofacial Radiology, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka, 565-0871, Japan., Takagawa N; Department of Oral and Maxillofacial Radiology, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka, 565-0871, Japan., Takeshita A; Department of Oral and Maxillofacial Radiology, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka, 565-0871, Japan., Iwamoto Y; Department of Oral and Maxillofacial Radiology, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka, 565-0871, Japan., Okahata R; Department of Oral and Maxillofacial Radiology, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka, 565-0871, Japan., Tsujimoto T; Department of Oral and Maxillofacial Radiology, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka, 565-0871, Japan., Kreiborg S; Department of Pediatric Dentistry and Clinical Genetics, School of Dentistry, Faculty of Health and Medical Sciences, University of Copenhagen, Nørre Allé 20, 2200, Copenhagen, Denmark.; 3D Craniofacial Image Research Laboratory (School of Dentistry, Department of Applied Mathematics and Computer Science, University of Copenhagen; Centre of Head and Orthopedics, Copenhagen University Hospital Rigshospitalet, Technical University of Denmark), Nørre Allé 20, 2200, Copenhagen, Denmark., Mallya SM; Section of Oral and Maxillofacial Radiology, UCLA School of Dentistry, 10833 Le Conte Ave., Los Angeles, CA, 90095-1668, USA., Yang FG; Department of Oral and Maxillofacial Radiology, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka, 565-0871, Japan.; Department of Foreign Languages and Literature, National Tsing Hua University, No.101, Section 2, Guangfu Rd., East District Hsinchu, 300013, Taiwan.; Center for Cognition and Mind Sciences, National Tsing Hua University, No.101, Section 2, Guangfu Rd., East District Hsinchu, 300013, Taiwan.
Jazyk: angličtina
Zdroj: Oral radiology [Oral Radiol] 2024 Oct 15. Date of Electronic Publication: 2024 Oct 15.
DOI: 10.1007/s11282-024-00778-y
Abstrakt: Objective: To assess quantitatively the effect of metallic materials on MR image uniformity using a standardized method.
Methods: Six types of 1 cm cubic metallic materials (i.e., Au, Ag, Al, Au-Ag-Pd alloy, Ti, and Co-Cr alloy) embedded in a glass phantom filled were examined and compared with no metal condition inserted as a reference. The phantom was scanned five times under each condition using a 1.5-T MR superconducting magnet scanner with an 8-channel phased-array brain coil and head and neck coil. For each examination, the phantom was scanned in three planes: axial, coronal, and sagittal using T1-weighted spin echo (SE) and gradient echo (GRE) sequences in accordance with the American Society for Testing and Materials (ASTM) F2119-07 standard. Image uniformity was assessed using the non-uniformity index (NUI), which was developed by the National Electrical Manufacturers Association (NEMA), as an appropriate standardized measure for investigating magnetic field uniformity.
Results: T1-GRE images with Co-Cr typically elicited the lowest uniformity, followed by T1-GRE images with Ti, while all other metallic materials did not affect image uniformity. In particular, T1-GRE images with Co-Cr showed significantly higher NUI values as far as 6.6 cm at maximum equivalent to 11 slices centering around it in comparison with the measurement uncertainty from images without metallic materials.
Conclusion: We found that MR image uniformity was influenced by the scanning sequence and coil type when Co-Cr and Ti were present. It is assumed that the image non-uniformity in Co-Cr and Ti is caused by their high magnetic susceptibility.
(© 2024. The Author(s).)
Databáze: MEDLINE
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