September 17, 2025

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

Key Points

The double-row pTx coil improved B1+ homogeneity and reduced SAR for pediatric DBS patients, enhancing imaging safety.
In simulations, the double-row coil outperformed conventional birdcage coils in terms of heat management and homogeneity.
FDTD simulation methods were utilized to compare the effectiveness of different coils on various child and adult models.
These findings indicate potential for better clinical outcomes and safer imaging protocols in pediatric patients with DBS devices.

Abstract

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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Cite This Study

Karadeniz et al. (Tue,) studied this question.

synapsesocial.com/papers/68d4597031b076d99fa5c531 https://doi.org/https://doi.org/10.58530/2025/1319

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