Permanent magnet assembly with movable permanent body for main magnetic field adjustable
First Claim
Patent Images
1. A permanent magnet assembly located in an imaging system, the assembly comprising:
- a fixed permanent magnet body having an opening formed therein; and
a movable permanent magnet body disposed at least partially within the opening and movable relative to the fixed permanent magnet body.
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Abstract
A permanent magnet assembly comprising a fixed permanent magnet body and a movable permanent magnet body which is movable relative to the fixed permanent magnet body.
93 Citations
40 Claims
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1. A permanent magnet assembly located in an imaging system, the assembly comprising:
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a fixed permanent magnet body having an opening formed therein; and a movable permanent magnet body disposed at least partially within the opening and movable relative to the fixed permanent magnet body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A magnetic imaging apparatus, comprising:
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a yoke comprising a first portion, a second portion and at least one third portion connecting the first and the second portions such that an imaging volume is formed between the first and the second portions; and a first permanent magnet assembly attached to the first yoke portion, the permanent magnet assembly comprising; a fixed permanent magnet body having an opening formed therein; and a movable permanent magnet body disposed at least partially within a portion of the opening and movable relative to the fixed permanent magnet body. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A permanent magnet assembly located in an imaging system, the assembly comprising:
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a first permanent magnet body fixed to a support and having an opening formed therein; and a second permanent magnet means disposed at least partially within a portion of the opening for moving relative to the first permanent magnet body to adjust a Bo field of the assembly and for not moving relative to the first permanent magnet body while the assembly is in operation. - View Dependent Claims (25, 26)
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27. A method of making a permanent magnet assembly for use in an imaging system, the method comprising:
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providing a fixed permanent magnet body; providing an opening in the fixed permanent magnet body; providing a movable permanent magnet body at least partially disposed within the opening; and moving the movable permanent magnet body relative to the fixed permanent magnet body to adjust a Bo field of the assembly. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification