Magnetic Field-Generating Device for Magnetic Particle Imaging
AssigneeUniversitat Zu Lubeck
InventorsThorsten BUZUG, Matthias WEBER
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Abstract
Disclosed is a device for simply creating a magnetic gradient field having a field-free line (FFL). The device comprises two ring-shaped Halbach arrays formed of permanent magnets, and preferably also a coil arrangement for electrically generating a homogeneous magnetic field for shifting the FFL in a predetermined plane. The FFL can be rotated together with the Halbach array in the plane, without the coil arrangement having to be rotated or moved. The invention is suitable for effective construction of a scanning device for magnetic particle imaging (MPI).
Claims20
A magnetic-field generating device exhibiting two structurally identical Halbach rings, formed from permanent magnets, of the Halbach order k=2 having in each case a predetermined inside diameter ID and outside diameter AD and predetermined ring width R and magnetization direction, characterized in that the Halbach rings having a center-point distance M greater than the ring width R and smaller than the outside diameter AD are arranged symmetrically relative to a plane of symmetry, the projections of the magnetization directions onto the plane of symmetry pointing in opposite directions.
Dependencies are inferred from the claim text.