A CRYOGEN-FREE SUPERCONDUCTING MAGNET WITH 95-CM WARM BORE FOR WHOLE-BODY MRI

Authors
XU BX SCHNURER S OBASIH K MRUZEK M IGE O LOCHNER R HELBING J MANTONE D
Citation
Bx. Xu et al., A CRYOGEN-FREE SUPERCONDUCTING MAGNET WITH 95-CM WARM BORE FOR WHOLE-BODY MRI, IEEE transactions on magnetics, 32(4), 1996, pp. 2637-2639
Citations number
2
Categorie Soggetti
Engineering, Eletrical & Electronic","Physics, Applied
Journal title
IEEE transactions on magnetics → ACNP
ISSN journal
00189464
Volume
32
Issue
4
Year of publication
1996
Part
1
Pages
2637 - 2639
Database
ISI
SICI code
0018-9464(1996)32:4<2637:ACSMW9>2.0.ZU;2-G
Abstract
A 0.5T, 95cm warm bore, cryogen-free superconducting magnet for whole body MRI has been developed and tested. By using Nb3Sn tape supercondu ctor, this magnet is designed to meet the same performance requirement as existing helium cooled MRI magnets. Persistent operation with drif t rate less than 0.1ppm/hour and a stable 5.6ppm field homogeneity in a 30cmx40cm cylindrical volume was achieved in October 1992, The magne t is cooled and maintained temperature of about 10K by a Gifford McMah on(G-M) cryocooler. High quality images were produced by using this ma gnet with the 0.5T GE SIGNA magnetic resonance imaging system.