摘要:
In a gradient coil and a method to manufacture a gradient coil for a magnetic resonance apparatus, the gradient coil has at least one saddle coil, the saddle coil having a spatially shaped, electrically conductive plate with a line-shaped recess penetrating the plate. Conductor structures that create a gradient magnetic field in an examination region when a current signal flows therethrough are formed by the recess and by the shaping of the plate. The recess is filled with an electrically insulating material before implementation of the spatial shaping.
摘要:
In a gradient coil and a method to manufacture a gradient coil for a magnetic resonance apparatus, the gradient coil has at least one saddle coil, the saddle coil having a spatially shaped, electrically conductive plate with a line-shaped recess penetrating the plate. Conductor structures that create a gradient magnetic field in an examination region when a current signal flows therethrough are formed by the recess and by the shaping of the plate. The recess is filled with an electrically insulating material before implementation of the spatial shaping.
摘要:
A method for producing a gradient coil assembly for a magnetic resonance imaging system includes applying a number of primary gradient coils and a number of secondary gradient coils to a winding mandrel to form the gradient coil assembly. A control coil arrangement is associated with the winding mandrel. During an intermediate check before completion of the gradient coil assembly, at least one coupling inductance value between the control coil arrangement and at least one of the primary gradient coils and/or at least one of the secondary gradient coils is determined. An arrangement of the relevant gradient coils on the winding mandrel is corrected as a function of the at least one coupling inductance value.
摘要:
A method for producing a gradient coil assembly for a magnetic resonance imaging system includes applying a number of primary gradient coils and a number of secondary gradient coils to a winding mandrel to form the gradient coil assembly. A control coil arrangement is associated with the winding mandrel. During an intermediate check before completion of the gradient coil assembly, at least one coupling inductance value between the control coil arrangement and at least one of the primary gradient coils and/or at least one of the secondary gradient coils is determined. An arrangement of the relevant gradient coils on the winding mandrel is corrected as a function of the at least one coupling inductance value.
摘要:
A method for producing at least one saddle coil for a gradient coil layer for a magnetic resonance tomography system is provided. At least one half cylinder-shaped, premolded saddle coil is arranged between an inner shell and an outer shell of a casting apparatus. The shells of the casting apparatus are closed, and the space between the shells is filled with a casting compound.
摘要:
Magnetic resonance device comprising a preferably essentially cylindrical vacuum housing containing a magnet together with a cooling device, said vacuum housing having an inner wall, an outer wall and two end walls, the inner wall and/or one or each end wall being fashioned as a composite component consisting of one or more components made of a non-metallic composite material and a plurality of metal components serving to provide mechanical reinforcement and having a lamellar or annular form for forming the inner wall or having the form of a segment of a circle for forming an end wall such that a reduction in eddy currents is produced.
摘要:
Magnetic resonance device comprising a preferably essentially cylindrical vacuum housing containing a magnet together with a cooling device, said vacuum housing having an inner wall, an outer wall and two end walls, the inner wall and/or one or each end wall being fashioned as a composite component consisting of one or more components made of a non-metallic composite material and a plurality of metal components serving to provide mechanical reinforcement and having a lamellar or annular form for forming the inner wall or having the form of a segment of a circle for forming an end wall such that a reduction in eddy currents is produced.
摘要:
In a method and apparatus for producing a plate-type insulation support provided with an adhesive layer for a gradient coil for a magnetic resonance device, an adhesive film forming the adhesive layer is used, which has a number of openings distributed over its surface to allow the passage of air and which is applied to the insulation support.
摘要:
A gradient coil system for a magnetic resonance tomography apparatus has a layer structure including a gradient coil layer and a cooling layer. The cooling layer is fashioned as a plate heat exchanger, composed of plates, for cooling the gradient coil layer. In this way, a highly efficient cooling of the gradient coil layer is achieved with a lower structural height compared to conventional tubular configurations.
摘要:
In a method to produce a curved coil, in particular a sub-coil of a gradient coil for a magnetic resonance apparatus, at least one conductor is wound corresponding to a predetermined pattern on a winding plate, and a winding plate composed of multiple plate elements that are moveable relative to one another is used that is formed into a curved shape after the winding of the conductor, in which curved shape the conductor is fixed while maintaining the curved shape.