Invention Grant
- Patent Title: Magnetic resonance apparatus having an asymmetrical cylindrical gradient coil and at least one asymmetrical shim-coil
- Patent Title (中): 具有不对称圆柱形梯度线圈和至少一个非对称垫片的磁共振装置
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Application No.: US11995953Application Date: 2006-07-14
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Publication No.: US08008916B2Publication Date: 2011-08-30
- Inventor: Jörg Riegler , Axel vom Endt
- Applicant: Jörg Riegler , Axel vom Endt
- Applicant Address: DE Munich
- Assignee: Siemens Aktiengesellschaft
- Current Assignee: Siemens Aktiengesellschaft
- Current Assignee Address: DE Munich
- Agency: Schiff Hardin LLP
- Priority: DE102005033955 20050720
- International Application: PCT/EP2006/064282 WO 20060714
- International Announcement: WO2007/009956 WO 20070125
- Main IPC: G01V3/00
- IPC: G01V3/00 ; A61B5/05
Abstract:
A magnetic resonance apparatus has a cylindrical gradient coil with an x-gradient coil and a y-gradient coil that are asymmetrical relative to the z-direction of a coordinate system, the z-direction extending along a longitudinal direction of a patient receptacle. Shim coils are provided that generate magnetic fields to homogenize the basic magnetic field, produced by a cylindrical basic field magnet, in an examination volume in the patient receptacle. At least some of the shim coils are asymmetrical relative to the z-direction to minimize coupling induction between the asymmetrical x-gradient coil and y-gradient coil and the asymmetrical shim coils.
Public/Granted literature
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