Improved metal suppression using new generation low-field MRI: a biophantom feasibility study.

Autor: Luitjens J; Department of Radiology and Biomedical Imaging, University of California San Francisco, 185 Berry Street, San Francisco, CA, 94158, USA.; Department of Radiology, University Hospital, LMU, Marchioninistraße 15, 81377, Munich, Germany., Ziegeler K; Department of Radiology and Biomedical Imaging, University of California San Francisco, 185 Berry Street, San Francisco, CA, 94158, USA. katharina.ziegeler@ucsf.edu., Yoon D; Department of Radiology and Biomedical Imaging, University of California San Francisco, 185 Berry Street, San Francisco, CA, 94158, USA., Gassert F; Department of Radiology and Biomedical Imaging, University of California San Francisco, 185 Berry Street, San Francisco, CA, 94158, USA.; Department of Diagnostic and Interventional Radiology, School of Medicine & Klinikum Rechts Der Isar, Technical University of Munich, Ismaninger Str. 22, 81675, Munich, Germany., Bhattacharjee R; Department of Radiology and Biomedical Imaging, University of California San Francisco, 185 Berry Street, San Francisco, CA, 94158, USA., Manatrakul R; Department of Radiology and Biomedical Imaging, University of California San Francisco, 185 Berry Street, San Francisco, CA, 94158, USA.; Department of Radiology, Faculty of Medicine Ramathibodi Hospital, Mahidol University, 270 Rama VI Rd, Thung Phaya Thai, Ratchathewi, Bangkok, 10400, Thailand., Ngarmsrikam C; Department of Radiology and Biomedical Imaging, University of California San Francisco, 185 Berry Street, San Francisco, CA, 94158, USA., Becker A; Department of Radiology and Biomedical Imaging, University of California San Francisco, 185 Berry Street, San Francisco, CA, 94158, USA., Yang Y; Department of Radiology and Biomedical Imaging, University of California San Francisco, 185 Berry Street, San Francisco, CA, 94158, USA., Joseph GB; Department of Radiology and Biomedical Imaging, University of California San Francisco, 185 Berry Street, San Francisco, CA, 94158, USA., Su P; Siemens Medical Solutions USA, Inc., 40 Liberty Blvd, Malvern, PA, 19355, USA., Itriago-Leon P; Siemens Medical Solutions USA, Inc., 40 Liberty Blvd, Malvern, PA, 19355, USA., Majumdar S; Department of Radiology and Biomedical Imaging, University of California San Francisco, 185 Berry Street, San Francisco, CA, 94158, USA., Link TM; Department of Radiology and Biomedical Imaging, University of California San Francisco, 185 Berry Street, San Francisco, CA, 94158, USA.
Jazyk: angličtina
Zdroj: Skeletal radiology [Skeletal Radiol] 2024 Oct 04. Date of Electronic Publication: 2024 Oct 04.
DOI: 10.1007/s00256-024-04809-x
Abstrakt: Objective: Novel 0.55 MRI scanners have the potential to reduce metal artifacts around orthopedic implants. The purpose of this study was to compare metal artifact size and depiction of anatomy between 0.55 T and 3.0 T MRI in a biophantom.
Materials and Methods: Steel and titanium screws were implanted in 12 porcine knee specimens and imaging at 0.55 T and 3 T MRI was performed using the following sequences: turbo spin-echo (TSE), TSE with view angle tilting (VAT), and slice encoding for metal artifact correction (SEMAC) with proton-density (PD) and T2-weighted short-tau inversion-recovery (T2w-STIR) contrasts. Artifacts were measured, and visualization of anatomy (cartilage, bone, growth plates, cruciate ligaments) was assessed and compared between groups.
Results: Metal artifacts were significantly smaller at 0.55 T. The smallest artifact sizes were achieved with SEMAC at 0.55 T for both PD and T2w-STIR sequences; corresponding relative size reductions vs. 3.0 T were 78.7% and 79.4% (stainless steel) and 45.3% and 1.4% (titanium). Depiction of anatomical structures was superior at 0.55 T.
Conclusion: Substantial reduction of artifact size resulting in superior depiction of anatomical structures is possible on novel 0.55 T MRI systems. Further clinical studies are required to elucidate patient-relevant advantages.
(© 2024. The Author(s), under exclusive licence to International Skeletal Society (ISS).)
Databáze: MEDLINE
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