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Radiofrequency field enhancement with high dielectric constant (HDC) pads in a receive array coil at 3.0T
Qing X Yang1, Sebastian Rupprecht, Wei Luo
1Department of Radiology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA. qyang@psu.edu
Purpose:
To investigate the use of a new high-dielectric constant (HDC) material for improving SNR and transmission efficiency for clinical MRI applications at 3 Tesla (T) with cervical spine imaging.
Materials And Methods:
Human subjects were imaged using a commercial cervical spine receive array coil on a clinical system with and without pads containing Barium Titanate beads in deuterium water placed around the neck. Numerical electromagnetic field simulations of the same configuration were also performed.
Results:
Experimental and simulated maps of transmit and receive fields showed greater efficiency for imaging the cervical spine when the pads were present. Experimental measurements showed a significant improvement in SNR with the pads present and an average input power reduction of 46%.
Conclusion:
Use of HDC material can enhance SNR and transmission efficiency for clinical imaging of the cervical spine at 3.0T.
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