Calculation of SAR and B1-field within human head excited by MRI birdcage coils

J. Chen, J. M. Jin

Research output: Contribution to journalConference articlepeer-review


Birdcage coils are used to generate radiofrequency (RF) pulses for magnetic resonance imaging (MRI) because of their capability to produce a highly homogeneous B1-field over a large volume within the coil. The interaction between the electromagnetic (EM) field and the biological object to be imaged deteriorates the B1-field homogeneity when the birdcage coils are used for high frequency MRI. The EM field interaction and the specific energy absorption rate (SAR) are computed using finite-difference time-domain (FDTD) method. The FDTD method can model the complex anatomical structure of the human head, the currents in the MRI coil, and the RF shield.

Original languageEnglish (US)
Pages (from-to)1210-1213
Number of pages4
JournalIEEE Antennas and Propagation Society, AP-S International Symposium (Digest)
StatePublished - 1997
EventProceedings of the 1997 IEEE Antennas and Propagation Society International Symposium. Part 1 (of 4) - Montreal, Can
Duration: Jul 13 1997Jul 18 1997

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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