University of Twente Student Theses


RF Heating Mitigation around a DBS lead at 3T

Roskamp, W. (2023) RF Heating Mitigation around a DBS lead at 3T.

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Abstract:The aim of this study is to propose a new method for mitigating the radiofrequency (RF) heating that occurs around a deep brain stimulation (DBS) lead during 3T MRI scans, in a reliable manner. This can be achieved by reducing the induced current at the shaft of DBS lead through the use of safe RF excitation settings, also known as implant friendly (IF) mode. These settings are determined using a manual and model-based approach that utilize low-SAR 2D Gradient Echo Sequence (GRE) calibration images for both transmit channels of the MRI scanner. The induced current from both pre-scans is then determined by utilizing the position of transmission RF magnetic field (Tx) null location relative to the DBS lead. In this study, it is shown that a model-based approach provides a comparable mitigation of the RF heating as compared to the manual approach, while offering a more reliable and robust outcome and eliminating user dependency. Therefore, it holds promise for potential integration of this method into clinical practise. Nonetheless, prior to the implementation of this method, further research needs to be conducted.
Item Type:Essay (Master)
Radboud UMC, Nijmegen, The Netherlands
Faculty:TNW: Science and Technology
Subject:33 physics, 44 medicine
Programme:Biomedical Engineering MSc (66226)
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