Magnetic Resonance Safety Evaluation of a Novel Alumina Matrix Composite Ceramic Knee and Image Artifact Comparison to a Metal Knee Implant of Analogous Design

Purpose: The goal of this study was to develop and validate a computational model that can accurately predict the influence of flow on the temperature rise of a peripheral vascular stent during MRI.Methods: Computational simulation of radio frequency (RF) induced heating of a vascular stent during MRI at 3.0 T was developed and validated with flow phantom experiments. The maximum temperature rise of the stent was measured as a function of physiologically relevant flow rates.Results: A significant difference was not identified between the experiment and simulation (P > 0.05). The temperature rise of the stent during MRI was over 10 °C without flow and was reduced by 5 °C with a flow rate of only 58 mL/min, corresponding to a reduction of CEM43 from 45 minutes to less than 1 minute. Conclusion: The computer simulation developed in this study was validated with experimental measurements, and accurately predicted the influence of flow on the RF-induced temperature rise of a vascular stent during MRI. Furthermore, the results of this study demonstrate that flow significantly reduces the temperature rise of a stent and the surrounding medium during RF-induced heating under typical scanning power and physiologically relevant conditions.

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Magnetic Resonance Safety Evaluation of a Novel Alumina Matrix Composite Ceramic Knee and Image Artifact Comparison to a Metal Knee Implant of Analogous Design

Cited by 2 publications

References 71 publications

A zirconia/tantalum biocermet: in vitro and in vivo evaluation for biomedical implant applications

A zirconia/tantalum biocermet: in vitro and in vivo evaluation for biomedical implant applications

Computational modeling of the thermal effects of flow on radio frequency-induced heating of peripheral vascular stents during MRI

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