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Abstract #2783

Combining Cylindrically Mounted Dipoles with Loops on a Transverse Plane for Better Head Coverage in Parallel Transmission.

Christopher John Wiggins1, Marie-France Hang1, Alexis Amadon1, Martijn Cloos1, Nicolas Boulant1, Michel Luong2, Guillaume Ferrand2, Karl Edler1

1LRMN, CEA/NeuroSpin, Gif-sur-Yvette cedex, France; 2Irfu, CEA/DSM, Gif-sur-Yvette cedex, France

Most transmit array coils for imaging of the human head are based on cylindrical designs. This arrangement leaves most elements at a distance from the superior surface of the brain. We present here a combination of dipoles (on a cylindrical surface) and geometrically decoupled loops (on a plane tranverse to the axis of the cylinder) to bring some elements closer to the superior surface of the head.

Keywords

accessible achieved acquisitions added adjusted allowed approximately around arrangement array arrays attempt axes axially axis better blue brain brought cable cables careful central channel circular close coil coils combinations combine common conductor configurations consisted contained containing conventionally corrected coupling couplings cover coverage cylinder cylindrical cylindrically decoupled decoupling degree described diameter dipole dipoles distance easily easy edge effective element elements equipped excitation experiencing extra field fitting flash gains generally generate geometric geometries geometry green head hexagonal human individual inside instance introduced involved lattice limited linearities located long loop loops made magnet mapping maps matrix measured minimize modes mostly mounted mutual neighboring noted null orientation oriented overall pairs parallel part particular particularly parts paths pattern patterns phantom placed placement plate poor power preamplifier principle produce quite rather receive recent reception reduce relatively rely required sensitivities sensitivity shot side since spacing spatial straight superior surface system transmission transmit transverse traps unlike utilizing various views