Modified design of the coil probe for high field MRI

Seifi, Bahram; Semouchkina, Elena; Perger, Warren F.; Lee, Gang Chea; Neuberger, Thomas; Lanagan, Michael T.

doi:10.1109/aps.2015.7305066

Cited by 2 publications

(1 citation statement)

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“…To create a more uniform distribution, the field near the coil ends should be increased, whereas the field in the center of the coil length should be decreased. Assuming that these changes could be accomplished by making denser wrapping of wire at both sides of the coil and sparser wrapping at its center, a non‐uniformly wrapped micro‐coil shown in Figure A was designed, in contrast to the uniformly wrapped micro‐coil, so that both coils had the same length of 9 mm along their axes.…”

Section: Resultsmentioning

confidence: 99%

Approaches to designing micro‐solenoidal RF probes for 14 T MRI studies of millimeter‐range sized objects

Seifi

Semouchkina

Lanagan

et al. 2016

Concepts Magn Reson

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Full‐wave electromagnetic simulations have been employed to analyze the design approaches that allow for solving the problems preventing inductive performance of micro‐solenoidal RF probes and formation of strong and homogeneous magnetic fields inside probes at the studies of millimeter‐range sized objects in 14 T MRI scanners. In particular, the effects of non‐uniform coil wrapping on field homogeneity inside extended coils and of partitioning the coils by dielectric separators on coil self‐resonances have been investigated. The possibility to utilize tunable C‐C matching circuits with the coils and to mitigate the effects of sample insertion on the probe resonance frequency has been demonstrated. Challenges of coil fabrication have been also addressed.

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Section: Resultsmentioning

confidence: 99%