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Magnetic resonance imaging using a superconducting magnet with an off-center homogeneous field zone
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10.1063/1.3560048
/content/aip/journal/jap/109/7/10.1063/1.3560048
http://aip.metastore.ingenta.com/content/aip/journal/jap/109/7/10.1063/1.3560048
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Figures

Image of FIG. 1.
FIG. 1.

(Color online) (a) Equipment for positioning a NMR probe in the homogeneous field zone of the magnet. (b) Iron pieces attached to an aluminum cylinder for passive shimming. (c) Magnetic field distribution measured after shimming. The distribution was plotted on a sphere located at the center of the homogeneous field zone. The parameters ϕ and z indicate the longitude and axial position, respectively. The absolute value at 0 ppm is 787.907 mT.

Image of FIG. 2.
FIG. 2.

(Color online) Experimental setup for measuring NMR and MRI.

Image of FIG. 3.
FIG. 3.

(Color online) (a) Circuit diagram of RF coil for MRI. (b) Schematic of the RF coil.

Image of FIG. 4.
FIG. 4.

1H NMR spectra of water (a) before and (b) after performing an active shim. The vertical axes in the two figures have an arbitrary unit but the same scale, which enables us to compare the two spectra. The absolute value at 0 ppm is 32.970 MHz.

Image of FIG. 5.
FIG. 5.

(Color online) (a) MRI of water in a spherical container. (b) MRI of okra.

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/content/aip/journal/jap/109/7/10.1063/1.3560048
2011-04-04
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Magnetic resonance imaging using a superconducting magnet with an off-center homogeneous field zone
http://aip.metastore.ingenta.com/content/aip/journal/jap/109/7/10.1063/1.3560048
10.1063/1.3560048
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