What type of study is this?

This is a Quantitative Study study.

September 17, 2025

Safety Evaluation of a 16-element 9.4T Human Head Transmit Array with B0 Field Probes Inserted

Key Points

Inserting B0 field-probes causes a maximum change of 18% in pSAR10g, indicating some increase in local heating.
Simulated B1+ decreased by 24% while the experimental results showed a reduction of 25%, suggesting impact on RF performance.
The study employed both numerical and experimental approaches to evaluate the safety of the 16Tx-array with phantom and human models.
Findings suggest that B0 field-probes can be safely used in in-vivo studies without significant alteration in RF safety metrics.

Abstract

Motivation: Combining RF-array with B0 field-probes provides capability of controlling quality of the image. However, presence of additional devices can lead to an increased local heating and inhomogeneities of magnetic field (B1+). Goal(s): To evaluate RF-safety of the 16Tx-array in the presence of multiple B0 field-probes. Approach: We numerically and experimentally evaluate the transmit performance of the 16Tx-array loaded by a phantom and human voxel models in the presence of 11 B0 field-probes. Results: Inserting the field-probes led to a change up to 18% for the worst-case (WC) pSAR10g and decrease of simulated B1+ up to 24% and experimental in 25%. Impact: We showed that insertion of B0 field-probes does not substantially change the peak SAR and the RF magnetic field distribution of the 16Tx array at 9.4T. Predicted SAR changes facilitate safe use of the field-probes for in-vivo studies.

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Cite This Study

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

synapsesocial.com/papers/68d45b0b31b076d99fa5d135 https://doi.org/https://doi.org/10.58530/2025/1320

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