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Abstract #3962

In Silico Trials On RF-Induced Hazards For Patients With Cerebral Stents Exposed to 1.5 T and 3.0 T MRI

Ananya Nandikanti1, Guanfa Shen2, Jianfeng Zheng1, Stuart A. Long1, and Ji Chen1
1University of Houston, Houston, TX, United States, 2William P. Clements High School, Sugar Land, TX, United States

Synopsis

Keywords: Safety, In Silico, RF-induced heating, MRI, brain, stents

Motivation: Lack of research on RF-induced heating in cerebral regions emphasizes the need for investigation, as surface curvature of brain, anatomical differences, and stent orientation across blood vessels in human models affect heating.

Goal(s): Study the correlation of RF-induced heating and electric fields in the brain region at 1.5T and 3T MRI.

Approach: EM simulations are performed along trajectories of sagittal sinus vein and internal carotid artery, with uniform vessel structures modeled for precision.

Results: The heating correlates with tangential electric fields, but correlation coefficients vary between human models. This implies that heating is influenced by vessel anatomy, local tissues, and stent placement.

Impact: This study highlights the importance of patient-specific in silico simulations to accurately predict RF-induced heating in cerebral stents during MRI. It demonstrates how anatomical variations, stent placement, and surrounding tissue properties influence heating, crucial for ensuring patient safety.

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Keywords