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1. GB2567204 - Electromagnet and assembly

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[ EN ]
CLAIMS 1 An electromagnet (100) for a Magnetic Resonance Imaging (MRI) apparatus, the electromagnet (100) comprising: a coil (110) for generating a magnetic field, the coil (110) having a first axially outer surface (112), and a support element (120) for mounting the coil (110) in the MRI; wherein the support element (120) is bonded to the first axially outer surface (112) of the coil (110). 2 The electromagnet (100) according to claim 1, wherein the support element (120) is configured for being mechanically fastened to a support structure (200). 3 The electromagnet (100) according to claim 1 or 2, wherein the support element (120) comprises a bonding face (122) by which the support element (120) is bonded to the first axially outer surface (112), and wherein the bonding face (122) is configured to have a reduced stiffness towards its periphery and a higher stiffness towards a central area of the bonding face. 4 The electromagnet (100) according to any previous claim, wherein a plurality of support elements (120) is bonded to the first axially outer surface, and wherein the plurality of support elements (120) is equally spaced around the first axially outer surface (112). 5 The electromagnet (100) according to any previous claim, the coil (110) comprising a second axially outer surface (114) opposite to the first axially outer surface (112), and wherein a further support element (120’) is bonded to the second axially outer surface (114). 6 The electromagnet (100) according to any previous claim, wherein the electromagnet (100) and the support element (120) are bonded using an adhesive suitable for cryogenic applications. 7 The electromagnet according to any previous claim, wherein the coil (110) and the support element (120) are resin-impregnated to form a monolithic structure. 8 An electromagnet assembly (10) for an MRI apparatus, comprising: the electromagnet (100) according to any previous claim, and a support structure (200) comprising a support plate (210, 220); wherein the support element (120) is mounted to the support plate (210, 220). 9 The electromagnet assembly (10) according to claim 8, wherein the support structure (200) comprises a pair of spaced-apart support plates (210, 220) forming a cavity (215) therebetween; wherein the support element (120) is received into the cavity (215) and mechanically fastened to the support plates (210, 220). 10 The electromagnet assembly (10) according to claim 8 or 9, comprising an extension tube (310) fitted around a pin (300) for making a pinned connection between the support plate (210, 220) and the support element (120), the extension tube (310) configured to abut against the support plate (210, 220) and the pin (300) configured to maintain compression on the support element (120) when the coil (110) is in its superconducting state. 11 The electromagnet assembly (10) according to any one of claims 7 to 10 when dependent on claim 5, wherein the support plates (210, 220) are configured to press the support element (120) and the further support element (120’) against the coil (110) when the coil is in its superconducting state. 12 The electromagnet assembly (10) according to any one of claims 7 to 11, wherein the support element (120) and the support plate (210, 220) are configured to make a pinned connection for securing the electromagnet (100) to the support structure (200). 13 An MRI apparatus comprising the electromagnet assembly (10) according to any one of claims 8 to 12. 14 A method of manufacturing an electromagnet for an MRI apparatus, the method comprising : winding a superconductor wire into a mould to form a coil (110); arranging a support element (120) against a first external surface (112) of the coil (110); impregnating the coil (110) and the support element (120) with a thermosetting resin; and removing the coil (110) and the support element (120) from the mould. 15 The method of manufacturing according to claim 14, comprising the step of placing a further support element (120’) against a second external surface (114) of the coil (110) prior to providing the thermosetting resin, the second external surface (114) being opposite to the first external surface (112) of the coil (110).