Laminate tile pole piece for an MRI magnet, a method of manufacturing the pole piece and a mold for bonding pole piece tiles

摘要

There iscribed a laminate tile pole piece (50) for an MRI (71-77) and a method and a mold for manufacturing laminate tile metal pole pieces (50) for an MRI. Each laminate tile(42) has a trapezoidal or annular sector shape. The trapezoidal shape allows the tiles (42) to be attached side by side to form a multiple concentric annular array pole piece (50) without using oddly shaped edge filler tiles needed to fill a circular pole piece with square tiles. The pole piece (50) is made by placing a plurality of tiles (42) into a mold (100) and filling the mold (100) with an adhesive substance to bind the plurality of tiles (42) into a unitary tile body (120). The unitary tile body (120) is then removed from the mold (100) and attached to a pole piece base (51) to form the pole piece (50). The mold cavity surface (101) preferably has a non-uniform contour (110). The bottom surface of the unitary tile body (120) forms a substantially inverse contour(114) of the mold cavity surface contour (110) <IMAGE> <IMAGE>