title: Quadrature RF Coil for In Vivo Brain MRI of a Macaque Monkey in a Stereotaxic Head Frame.
abstract: We present a quadrature volume coil designed for brain imaging of a macaque monkey fixed in a sphinx position (facing down the bore) within a stereotactic frame at 3 T, where the position of the monkey and presence of the frame preclude use of existing coils. Requirements include the ability to position and remove the coil without disturbing the position of the monkey in the frame. A saddle coil and a solenoid were combined on a modified cylindrical former and connected in quadrature as to produce a homogeneous circularly polarized field throughout the brain. To allow the loops of the saddle coil to encompass the ear posts, partial disassembly and reassembly were facilitated by embedding pin and socket contacts into separate pieces of the former. Coil design included simulation of the electromagnetic fields for the coil containing a 3D model of a monkey's head. The resulting coil produced adequate homogeneity and signal-to-noise ratio throughout the brain.
authors.affiliation: Capital College, School of Science, Engineering, and Technology, The Pennsylvania State University, Middletown, PA 17057.
authors.forename: Colin A
authors.initials: CA
authors.lastname: Roopnariane
authors.forename: Yeun-Chul
authors.initials: YC
authors.lastname: Ryu
authors.forename: Mohammad-Reza
authors.initials: MR
authors.lastname: Tofighi
authors.forename: Patti A
authors.initials: PA
authors.lastname: Miller
authors.forename: Sukhoon
authors.initials: S
authors.lastname: Oh
authors.forename: Jianli
authors.initials: J
authors.lastname: Wang
authors.forename: Bu Sik
authors.initials: BS
authors.lastname: Park
authors.forename: Lukas
authors.initials: L
authors.lastname: Ansel
authors.forename: Christopher A
authors.initials: CA
authors.lastname: Lieu
authors.forename: Thyagarajan
authors.initials: T
authors.lastname: Subramanian
authors.forename: Qing X
authors.initials: QX
authors.lastname: Yang
authors.forename: Christopher M
authors.initials: CM
authors.lastname: Collins