A microstrip-based RF coil for use in an MRI apparatus constructed to
perform human head imaging is provided and includes (a) a cylindrical
non-magnetic core module having an outer surface and a longitudinal axis,
a cylindrical bore extending through the core module along the
longitudinal axis and defining an inner surface; and a plurality of
conductive strip lines. The strip lines extend parallel to the
longitudinal axis on the outer surface of the core module. The coil is
constructed such that one or more of the conductive strips are divided
into conductive microstrip segments with one or more tuning capacitors
being bridged between two adjacent microstrip segmented sections of the
conductive strip. The coil also include a shield support cylinder that is
disposed concentrically about the core module and is spaced therefrom to
receive the tuning capacitors. The shield support cylinder supports a
conductive segmented shield that is operatively connected to the
conductive strips through tunable capacitors at a front and rear of the
shield support cylinder.