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Abstract #1331

Influence of Deactivated 8Tx/16Rx Transceiver Coil Elements on 3D SAR Distribution at 7T MRI of the Body Trunk

Farzad Jabbarigargari1, Maxim Terekhov1, and Laura Maria Schreiber1
1Chair of Molecular and Cellular Imaging, Comprehensive Heart Failure Center, University Hospital Wuerzburg, Wuerzburg, Germany

Synopsis

Keywords: Safety, Safety

Motivation: In 7T cardiac MRI, controlling peak SAR and SAR distribution is critical for safety. This study explores how deactivating loop coil elements affects these metrics.

Goal(s): We assess the impact of coil element deactivation on SAR in a shared-conductor loop coil across different human models.

Approach: Electromagnetic simulations were conducted on ten human models, analyzing SAR under normal conditions and with individual coil element deactivations.

Results: Coil element deactivation increases peak SAR, up to 77.61% in the Rosalind model, and changes SAR distribution by up to 474% in the Laura model, varying with coil position and model anatomy.

Impact: This study highlights the significant impact of coil element deactivation on SAR, requiring a safety factor in clinical routines to protect patients if coil elements become deactivated.

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Keywords