Antenna assembly for magnetic resonance unit

Details Antenna assembly for magnetic resonance unit Antenna assembly for magnetic resonance unit

2006-02-21

2009-06-23

Chen, Shih-Chao (Department: 2821)

Communications: radio wave antennas

Antennas

Rod type

C324S318000

Reexamination Certificate

active

07551147

ABSTRACT:
An antenna for a magnetic resonance unit has a number of antenna rods arranged substantially regularly around an antenna axis, and being axially oriented relative to said antenna axis. Each antenna rod has two opposite ends with a central portion therebetween. The ends of each rod are electrically connected with the ends of at least one adjacent antenna rod by connecting elements oriented tangentially relative to the antenna axis. The rods are symmetrical relative to a plane of symmetry that proceeds perpendicularly relative to the antenna axis. Each point of each antenna rod defines a radial direction with the antenna axis, and the central portion defines a reference direction with respect to the antenna axis. Each radial direction forms a tangential angle with the reference direction, which is a non-constant function of the axial spacing of each point from the central portion of that rod.

REFERENCES:
patent: 6369570 (2002-04-01), Wong et al.
patent: 6795037 (2004-09-01), Greim
patent: 6806710 (2004-10-01), Renz et al.
patent: 6842003 (2005-01-01), Heid et al.
patent: 6943551 (2005-09-01), Eberler et al.
patent: 2004/0100262 (2004-05-01), Seeber
patent: WO 03/008988 (2003-01-01), None
“A Spiral Volume Coil for Improved RF Field Homogeneity at High Static Magnetic Field Strength,” Alsop et al, Magnetic Resonance In Medicine, vol. 40 (1998), pp. 49-54.

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