Figure 1:

(a) The ¹H/²³Na bilateral breast coil in its tailored housing. (b) Left and right units were separated by two RF shields (in blue) which reduced coupling enabling bilateral operation. (c) Each unit of the coil is constituted by three layers. From the outermost to the innermost: a three-turns series solenoid for ²³Na transmission, a three-turns series solenoid for ¹H excitation and reception and a four-channel ²³Na receive array. For sake of simplicity the series connection among the loops as well as the lumped elements are not reported.