Assessment of MRI Issues at 3 Tesla for a New Metallic Tissue MarkerReport as inadecuate




Assessment of MRI Issues at 3 Tesla for a New Metallic Tissue Marker - Download this document for free, or read online. Document in PDF available to download.

International Journal of Breast Cancer - Volume 2015 2015, Article ID 823759, 5 pages -

Research Article

Loyola Marymount University, 1 LMU Drive, Los Angeles, CA 90045, USA

Keck School of Medicine, University of Southern California and Institute for Magnetic Resonance Safety, Education, and Research, 7751 Veragua Drive, Playa Del Rey, CA 90293, USA

Received 17 May 2015; Revised 21 June 2015; Accepted 24 June 2015

Academic Editor: Vladimir F. Semiglazov

Copyright © 2015 Charlotte M. Cronenweth and Frank G. Shellock. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Purpose. To assess the MRI issues at 3 Tesla for a metallic tissue marker used to localize removal areas of tissue abnormalities. Materials and Methods. A newly designed, metallic tissue marker Achieve Marker, CareFusion, Vernon Hills, IL used to mark biopsy sites, particularly in breasts, was assessed for MRI issues which included standardized tests to determine magnetic field interactions i.e., translational attraction and torque, MRI-related heating, and artifacts at 3 Tesla. Temperature changes were determined for the marker using a gelled-saline-filled phantom. MRI was performed at a relatively high specific absorption rate whole body averaged SAR, 2.9-W-kg. MRI artifacts were evaluated using T1-weighted, spin echo and gradient echo pulse sequences. Results. The marker displayed minimal magnetic field interactions 2-degree deflection angle and no torque. MRI-related heating was only 0.1°C above background heating i.e., the heating without the tissue marker present. Artifacts seen as localized signal loss were relatively small in relation to the size and shape of the marker. Conclusions. Based on the findings, the new metallic tissue marker is acceptable or “MR Conditional” using current labeling terminology for a patient undergoing an MRI procedure at 3 Tesla or less.





Author: Charlotte M. Cronenweth and Frank G. Shellock

Source: https://www.hindawi.com/



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