Magnetic resonance imaging scanner with molded fixed shims

A magnetic resonance imaging scanner includes a generally cylindrical main magnet assembly (10) that defines a cylinder axis (16). A first set of shims (60) are rigidly positioned inside the magnet assembly (10) at about a first distance (d1) relative to the cylinder axis (16). A second set of shims...

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Hauptverfasser:	MULDER GERARDUS B. J, ALDEN JEROME S, EVERETT DENNIS K, SHARPLESS RONALD B, DOYLE TERRENCE M, HENDERSON ROBERT G, PEEREN GERARDUS N, AMOR WILLIAM H
Format:	Patent
Sprache:	eng
Schlagworte:	DETECTING MASSES OR OBJECTS GEOPHYSICS GRAVITATIONAL MEASUREMENTS MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS TESTING
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creator	MULDER GERARDUS B. J ALDEN JEROME S EVERETT DENNIS K SHARPLESS RONALD B DOYLE TERRENCE M HENDERSON ROBERT G PEEREN GERARDUS N AMOR WILLIAM H
description	A magnetic resonance imaging scanner includes a generally cylindrical main magnet assembly (10) that defines a cylinder axis (16). A first set of shims (60) are rigidly positioned inside the magnet assembly (10) at about a first distance (d1) relative to the cylinder axis (16). A second set of shims (62) are rigidly positioned inside the main magnet assembly (10) at about a second distance (d2) relative to the cylinder axis (16). The second distance (d2) is different from the first distance (d1). A generally cylindrical radio frequency coil (26) is arranged inside the main magnet assembly (10) at about a third distance (d3) relative to the cylinder axis (16). A plurality of gradient coils (20) are arranged inside the main magnet assembly (10) at about a fourth distance (d4) relative to the cylinder axis (16).
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A generally cylindrical radio frequency coil (26) is arranged inside the main magnet assembly (10) at about a third distance (d3) relative to the cylinder axis (16). 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J ; ALDEN JEROME S ; EVERETT DENNIS K ; SHARPLESS RONALD B ; DOYLE TERRENCE M ; HENDERSON ROBERT G ; PEEREN GERARDUS N ; AMOR WILLIAM H</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US7495441B23</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2009</creationdate><topic>DETECTING MASSES OR OBJECTS</topic><topic>GEOPHYSICS</topic><topic>GRAVITATIONAL MEASUREMENTS</topic><topic>MEASURING</topic><topic>MEASURING ELECTRIC VARIABLES</topic><topic>MEASURING MAGNETIC VARIABLES</topic><topic>PHYSICS</topic><topic>TESTING</topic><toplevel>online_resources</toplevel><creatorcontrib>MULDER GERARDUS B. J</creatorcontrib><creatorcontrib>ALDEN JEROME S</creatorcontrib><creatorcontrib>EVERETT DENNIS K</creatorcontrib><creatorcontrib>SHARPLESS RONALD B</creatorcontrib><creatorcontrib>DOYLE TERRENCE M</creatorcontrib><creatorcontrib>HENDERSON ROBERT G</creatorcontrib><creatorcontrib>PEEREN GERARDUS N</creatorcontrib><creatorcontrib>AMOR WILLIAM H</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>MULDER GERARDUS B. J</au><au>ALDEN JEROME S</au><au>EVERETT DENNIS K</au><au>SHARPLESS RONALD B</au><au>DOYLE TERRENCE M</au><au>HENDERSON ROBERT G</au><au>PEEREN GERARDUS N</au><au>AMOR WILLIAM H</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Magnetic resonance imaging scanner with molded fixed shims</title><date>2009-02-24</date><risdate>2009</risdate><abstract>A magnetic resonance imaging scanner includes a generally cylindrical main magnet assembly (10) that defines a cylinder axis (16). A first set of shims (60) are rigidly positioned inside the magnet assembly (10) at about a first distance (d1) relative to the cylinder axis (16). A second set of shims (62) are rigidly positioned inside the main magnet assembly (10) at about a second distance (d2) relative to the cylinder axis (16). The second distance (d2) is different from the first distance (d1). A generally cylindrical radio frequency coil (26) is arranged inside the main magnet assembly (10) at about a third distance (d3) relative to the cylinder axis (16). A plurality of gradient coils (20) are arranged inside the main magnet assembly (10) at about a fourth distance (d4) relative to the cylinder axis (16).</abstract><oa>free_for_read</oa></addata></record>
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subjects	DETECTING MASSES OR OBJECTS GEOPHYSICS GRAVITATIONAL MEASUREMENTS MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS TESTING
title	Magnetic resonance imaging scanner with molded fixed shims
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