Actively shielded transverse gradient coil for nuclear magnetic resonance tomography apparatus

US5512828A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Guenther Pausch · Effeltrich, DE
• Heinz Hentzelt · Erlangen, DE

Key dates

• Filing date: Jun 20, 1995
• Grant date: Apr 30, 1996
• Expiry date: Jun 20, 2015

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/4215
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An actively shielded transverse gradient coil arrangement contains a primary coil and a secondary coil that are arranged at a radial spacing from one another. Turns of the primary coil and the secondary coil disposed farther from the center of the examination volume in an axial direction of the gradient coil arrangement have a smaller radial spacing from one another than do turns lying close to the center. The parasitic flux density can thus be minimized. This is particularly important in EPI sequences for avoiding physiological stimulations in the examination subject.