In a bird cage resonator, the axial length of rungs is changed between orthogonal elements. By doing this, the real view fields of orthogonal ports A and B in the sagittal direction are changed and the sensitivity difference between both view fields is reduced. For an object with an elliptical section...http://www.google.fr/patents/US5510714?utm_source=gb-gplus-shareBrevet US5510714 - Magnetic resonance imaging apparatus and RF coil employed therein
Magnetic resonance imaging apparatus and RF coil employed therein