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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Yamamoto, S. Yamada, T. Morita, M. Matsuda, T. Iwamoto, M. |
| Copyright Year | 1965 |
| Abstract | A 6th order superconducting solenoid coil has been developed for a whole body magnetic resonance imaging. Nine sets of shim coils are equipped on the solenoid coil. A least squares computer program was applied to determine shim coil currents analytically. After the field correction using shim coils, the homogeneity of 7.6 × 10-6/30cm DSV was obtained. The effects of ferromagnetic objects on the homogeneity was studied. The error field caused by iron spheres agreed well with the theoretical results. It was found that ferromagnetic objects generated mainly the 1st order error field and this could be corrected by shim coils. The effects of heat and charge/discharge cycles of the magnet on the homogeneity was studied. |
| Sponsorship | IEEE Magnetics Society |
| Starting Page | 698 |
| Ending Page | 701 |
| Page Count | 4 |
| File Size | 326692 |
| File Format | |
| ISSN | 00189464 |
| Volume Number | 21 |
| Issue Number | 2 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1985-03-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Superconducting magnets Least squares methods Superconducting coils Magnetic field measurement Solenoids Magnetic resonance imaging Computer errors Magnetic analysis Error correction Iron |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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