1. Practical improvements in the design of high permittivity pads for dielectric shimming in neuroimaging at 7 T
- Author
-
Wyger M. Brink, Andrew G. Webb, and Thomas O'Reilly
- Subjects
Permittivity ,Nuclear and High Energy Physics ,High permittivity materials ,Materials science ,business.product_category ,Biophysics ,Relative permittivity ,Neuroimaging ,Dielectric ,B-1 homogeneity ,Biochemistry ,Mixing rules ,030218 nuclear medicine & medical imaging ,03 medical and health sciences ,0302 clinical medicine ,Humans ,Headphones ,Perovskite (structure) ,business.industry ,Induced currents ,Condensed Matter Physics ,Image Enhancement ,Magnetic Resonance Imaging ,Characterization (materials science) ,Matrix stabilization ,Electromagnetic coil ,Optoelectronics ,business ,Material properties ,030217 neurology & neurosurgery - Abstract
Improvements are proposed for practical design and use of high permittivity materials in high field neuroimaging in three different areas: (i) a simple formula to predict the permittivity of tri-component aqueous-based perovskite suspensions with relative permittivities between 110 and 300, (ii) characterization of addition of a hydroxyethyl-cellulose gelling agent to improve the long-term stability and material properties of "dielectric pads", and (iii) investigation of the integration of, for example, headphones into the dielectric pads to increase patient comfort within tightly-fitting receive coil arrays.
- Published
- 2016