Computational modeling of the thermal effects of flow on radio frequency-induced heating of peripheral vascular stents during MRI
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 near a peripheral vascular stent during magnetic resonance imaging (MRI). Methods . Computational modeling and simulation of radio frequency (R...
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Veröffentlicht in: | Biomedical physics & engineering express 2023-11, Vol.9 (6), p.65025 |
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Hauptverfasser: | , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | 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 near a peripheral vascular stent during magnetic resonance imaging (MRI).
Methods
. Computational modeling and 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
−1
, corresponding to a reduction of CEM
43
from 45 min to less than 1 min.
Conclusion
. The computer model 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 relatively low flow rates significantly reduce 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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ISSN: | 2057-1976 2057-1976 |
DOI: | 10.1088/2057-1976/ad0398 |