RF coil considerations for short-T2 MRI.

Horch RA, Wilkens K, Gochberg DF, Does MD
Magn Reson Med. 2010 64 (6): 1652-7

PMID: 20665825 · PMCID: PMC2970722 · DOI:10.1002/mrm.22558

With continuing hardware and pulse sequence advancements, modern MRI is gaining sensitivity to signals from short-T(2) (1)H species under practical experimental conditions. However, conventional MRI coils are typically not designed for this type of application, as they often contain proton-rich construction materials that may contribute confounding (1)H background signal during short-T(2) measurements. An example of this is shown herein. Separately, a loop-gap style coil was used to compare different coil construction materials and configurations with respect to observed (1)H background signal sizes in a small animal imaging system. Background signal sources were spatially identified and quantified in a number of different coil configurations. It was found that the type and placement of structural coil materials around the loop-gap resonator, as well as the coil's shielding configuration, are critical determinants of the coil's background signal size. Although this study employed a loop-gap resonator design, these findings are directly relevant to standard volume coils commonly used for MRI.

MeSH Terms (10)

Cadaver Copper Equipment Design Femur Humans Imaging, Three-Dimensional Magnetic Resonance Imaging Polycarboxylate Cement Polytetrafluoroethylene Radio Waves

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