Design, construction and performance testing of a 1.5 T cryogen-free low-temperature superconductor whole-body MRI magnet

Autor:	Yulin Wang, Sucong Wang, Ping Liang, Vladimir Brusic, Jie Zeng, Bingjian Liu, Yuwei Ge, Jianjun Zheng, Jingfeng Zhang, Chengbo Wang
Rok vydání:	2023
Předmět:	Materials Chemistry Metals and Alloys Ceramics and Composites Electrical and Electronic Engineering Condensed Matter Physics
Zdroj:	Superconductor Science and Technology. 36:045002
ISSN:	1361-6668 0953-2048
DOI:	10.1088/1361-6668/acb467
Popis:	This work describes the design, construction and testing of a 1.5 T cryogen-free low-temperature superconductor niobium–titanium whole-body magnet with a bore diameter of 850 mm that is suitable for clinical magnetic resonance imaging (MRI) applications. The magnet is actively shielded and passively shimmed to achieve confinement within a 0.5 mT stray magnetic field at 2.5/4 m radial/axial positions and 12.1 ppm field inhomogeneity over a 45 mm diameter of spherical volume. The magnet is conductively refrigerated using a two-stage Gifford–McMahon cryocooler and can be maintained at a steady temperature below 5.7 K during MRI scanning. The MRI scanner assembled with the designed cryogen-free magnet demonstrated stable performance and provided MRI images with good quality and high contrast.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::dd44053ca91e9b19f83cd79bc4d5b01b https://doi.org/10.1088/1361-6668/acb467 Zobrazit plný text záznamu