Patent ID: 6933723

Claim:
A coil system ( 210 ) for an apparatus which operating in conformity with the spin resonance or magnetic resonance (MR) method, which coil system ( 210 ) encloses an examination space ( 217 ), which extends along an axis ( 218 ) and is intended to receive a patient ( 215 ), and includes an inner RF coil ( 219 ), an inner sub-coil ( 213 ′) which externally encloses the RF coil ( 219 ) and projects beyond the RF coil ( 219 ) in the axial direction at both sides, and an active shield ( 212 ) which externally encloses the inner sub-coil ( 213 ′) and constitutes a gradient coil arrangement in conjunction with the inner sub-coil ( 213 ′), characterized in that, in order to reduce the energy required for the gradient coil system ( 213 ′, 212 ), the volume which is present between the inner sub-coil ( 213 ′) and the active shield ( 212 ) is enlarged in that the cross-section of the inner sub-coil ( 213 ′) in the direction perpendicular to the axis ( 218 ) is smaller in regions to both sides of the RF coil ( 219 ) than in the region of the RF coil.