The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 23, 2006
Filed:
Aug. 27, 2001
Hitoshi Yoshino, Kashiwa, JP;
Fred Goldie, Worthing, GB;
Hitoshi Yoshino, Kashiwa, JP;
Fred Goldie, Worthing, GB;
Hitachi Medical Corporation, Tokyo, JP;
Abstract
In a superconductive magnet device comprising upper and lower vacuum vessels coupled by a coupling conduit, the upper and lower vacuum vesselsand the coupling conduitcoupling them are made of a high electric-resistance material so that the magnetic flux of gradient magnetic field coils reaches the upper and lower pair of a second heat shieldsand a coupling conduitcoupling the pair of the second heat shieldsThe coupling conduitcoupling the upper and lower pair of the second heat shieldsis provided with a slit (cut)extending in the vertical direction so that no eddy currents occur and thus eddy currents generated asymmetrically in the coupling conduitare reduced. Artifacts caused by asymmetrical eddy currents can by reduced in an MRI apparatus using such a magnet device.