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Abstract #1319

Safe Imaging at 3 Tesla for Children with Deep Brain Electrodes: A simulation Study of a Double-Row Parallel Transmit Coil Array

Nejat Karadeniz1, Daniel E Lumsden2,3, Jo V Hajnal1,3,4, and Özlem Ipek1
1Imaging physics and engineering research department, School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom, 2Complex Motor Disorders Service, Evelina London Children's Hospital, London, United Kingdom, 3Research Department of Early Life Imaging, Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom, 4Centre for the Developing Brain, King's College London, London, United Kingdom

Synopsis

Keywords: Safety, Safety

Motivation: Safe postoperative MRI imaging is essential for children with DBS devices, as conventional MRI poses risks of tissue heating. This study addresses the challenge of balancing B1+ homogeneity with SAR safety in pediatric DBS patients.

Goal(s): To evaluate the performance of double-row pTx coil compared to conventional birdcage coils in pediatric DBS patients.

Approach: We compared a 16-channel double-row pTx coil and a birdcage coil on four child models and one adult model using FDTD simulation, applying SAR-regularized-MLS optimisation to balance B1+ homogeneity and SAR1g.

Results: The double-row coil demonstrated superior B1+ homogeneity and reduced SAR1g, enhancing MRI safety for pediatric DBS patients.

Impact: The double-row pTx coil enhances MRI safety for paediatric DBS patients by balancing B1+ homogeneity and reducing SAR, minimizing tissue heating risks and enabling safer, more reliable imaging protocols with consistent performance across models, potentially improving clinical outcomes.

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Keywords