Nuclear Magnetic Resonance apparatus
AssigneeEsaote S.p.A.
InventorsAlessandro Trequattrini, Luigi Satragno, Eugenio Biglieri, Stefano Pittaluga
Life of this patent
Estimating the term…
Abstract
A magnet for a Magnetic Resonance Imaging apparatus, said magnet having at last two, preferably three open sides, and delimiting the patient receiving area, said magnet being composed of three yoke elements, i.e. two parallel magnetically permeable elements and one transverse yoke element for connection of said two parallel elements, whereby said magnet has a C shape and wherein, for both of said parallel elements, the terminal portion associated to said transverse connecting element has a transverse wall for connection of said two parallel elements with the transverse element, which has an end step for engagement of a corresponding end of said transverse element.
Claims68
A magnet for a Magnetic Resonance Imaging apparatus, said magnet comprising:
- at least two pole pieces, between which pole pieces a cavity is formed for containing at least one body under examination, wherein said cavity is open on at least one side;
- two parallel magnetically permeable yoke elements;
- and
- a transverse yoke element for connection of said two parallel elements, said magnet thus having a C shape,
- wherein in both parallel elements, an end portion associated with said transverse connection element has a transverse wall for connecting the two parallel elements with the transverse element, the transverse wall having an end step for engagement of a corresponding end of said transverse element;
- and
- wherein each pole piece includes at least one magnetized layer, and at least one magnetically permeable layer or plate, wherein said magnetically permeable plate has a substantially circular shape and said magnetized layer is formed by a plurality of adjacent and/or superimposed magnetized blocks which form a polygon essentially approximating the circular shape of said magnetically permeable plate.
A pole piece for a Magnetic Resonance Imaging apparatus, comprising
- at least one magnetized layer;
- at least one magnetically permeable layer or plate, wherein said magnetically permeable plate has a substantially circular shape and said magnetized layer is formed by a plurality of adjacent and/or superimposed magnetized blocks, which form a polygon essentially approximating the circular shape of said magnetically permeable plate;
- and
- fastener posts located in a margin between said polygon and said circumference approximated by the polygon, for securing the pole piece to an inner face of a corresponding parallel yoke element.
A Magnetic Resonance Imaging apparatus, comprising:
- a magnet having at least two pole pieces, between which pole pieces a cavity is formed for containing at least one body under examination, wherein said cavity is open on at least one side;
- and
- at least one magnet support structure, wherein said magnet is capable of rotating relative to said support structure;
- wherein the magnet includes two parallel magnetically permeable yoke elements, and a transverse yoke element for connection of said two parallel elements, said magnet thus having a C shape, wherein in both parallel elements, an end portion associated with said transverse connection element has a transverse wall for connecting the two parallel elements with the transverse element, the transverse wall having an end step for engagement of a corresponding end of said transverse element, and
- wherein each pole piece includes at least one magnetized layer, and at least one magnetically permeable layer or plate, wherein said magnetically permeable plate has a substantially circular shape and said magnetized layer is formed by a plurality of adjacent and/or superimposed magnetized blocks which form a polygon essentially approximating the circular shape of said magnetically permeable plate.
Dependencies are inferred from the claim text.