Title: MRI magnetic field generator
Application Number: 97182074 Application Date: 1997.12.26
Publication Number: 1248896 Publication Date: 2000.03.29
Approval Pub. Date: Granted Pub. Date: 2005.02.02
International Classifi-cation: A61B5/055,G01R33/3873
Applicant(s) Name: Sumitomo Special Metals Co., Ltd. Address:
Inventor(s) Name: Aqki Masaaki
Attorney & Agent: ma gao
Abstract:
     An MRI magnetic field generator comprising a pair of pole pieces and an inclined magnetic field coil which is attached to the pair of the pole pieces. The adjustment of the magnetic field uniformity within the imaged field of view of a gap can be made safely and easily without removing the inclined magnetic field coil. After a holder disc is put on a base disc and fixed, magnetic material small pieces or permanent magnet small pieces for the adjustment of the magnetic field uniformity are inserted into the necessary positions of pits which are arranged in a predetermined pattern. Then spacers are inserted into the space between the holder disc and a cover disc in the pits as necessary, positioned and fixed with screws to form a unified shim holder which is aligned with the inclined magnetic field ocil or its support and fixed.
Time: 19
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