Journal
JOURNAL OF MAGNETIC RESONANCE
Volume 203, Issue 2, Pages 323-327Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jmr.2010.01.003
Keywords
Dielectric materials; High-field MRI; Transmit arrays; Electromagnetics
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The spatial distribution of electromagnetic fields within the human body can be tailored using external dielectric materials. Here, we introduce a new material with high dielectric constant, and also low background MRI signal. The material is based upon metal titanates, which can be made into a geometrically-formable suspension in de-ionized water. The material properties of the suspension are characterized from 100 to 400 MHz. Results obtained at 7 T show a significant increase in image intensity in areas such as the temporal lobe and base of the brain with the new material placed around the head, and improved performance compared to purely water-based gels. (C) 2010 Elsevier Inc. All rights reserved.
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