LOW FRINGE FIELD PERMANENT MAGNET FOR MR APPARATUS

A magnetic resonance arrangement with a permanent magnet system and having magnet elements, pole piece elements and yoke elements of magnetic material arranged cylinder-symmetrically with respect to the z axis. The yoke elements have a first lid (11′) and a second lid (11″) and also a hollow cylindr...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Hänichen, Lukas, Pietig, Rainer
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS TESTING
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Beschreibung
Zusammenfassung:	A magnetic resonance arrangement with a permanent magnet system and having magnet elements, pole piece elements and yoke elements of magnetic material arranged cylinder-symmetrically with respect to the z axis. The yoke elements have a first lid (11′) and a second lid (11″) and also a hollow cylindrical drum (12) arranged axially between the lids. The yoke elements enclose the measuring volume in the axial and radial direction. The magnet elements each include a pair of cylinder-symmetrical axial magnets (13′, 13″) and also radial magnet rings (14′, 14″). The axial magnets are each arranged axially adjoining the lids and are arranged radially within the radial magnet rings and respectively axially further away from the measuring volume than the radial magnet rings. The outer diameter of the axial magnets is less than or equal to the inner diameter of the radial magnet rings.