For the purpose of changing the geometry of and spacing between loop coils
incorporated into an RF coil without moving the RF coil, a first plurality
of loops having a geometry optimized for a square sum method employing a
phased array, and a second plurality of small loops having a geometry
optimized for a sensitivity encoding method are switched by switching
elements for an open/close operation using a diode, and at the same time,
a first decoupling means and a second decoupling means are switched. Thus,
an operator is not required to replace the RF coil positioned on a cradle,
and the first plurality of loops for the square sum method employing a
phased array and the second plurality of small loops for the sensitivity
encoding method can be switched by electronic switching and can be used as
RF coils.
