MR tomography apparatus and method for suppressing stimulation of an examination subject

US6418336B1 · kind B1 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Ralph Kimmlingen · Zirndorf, DE
• Franz Schmitt · Erlangen, DE

Key dates

• Filing date: Aug 4, 2000
• Grant date: Jul 9, 2002
• Expiry date: Aug 4, 2020

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/3852
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In an MR tomography system and a method for operating an MR tomography system for the purpose of executing both fast and conventional measuring sequences with high image resolution without triggering stimulations in a living subject and with a high degree of freedom in the selection of imaging regions, a gradient coil is provided with at least two independently controllable potions, so that it is possible to set up gradient fields for a first imaging subregion and for a second imaging subregion that is not a subset of the first region and does not contain it, as well as an aggregate imaging region that contains at least the first and second imaging regions. The gradient fields for different regions can be set up in chronological succession, the various possibilities for setting up the gradient fields allows a selection dependent on the set measuring sequences to be determined prior to the execution of data acquisition with an examination subject present, so that stimulations do not occur in the actual execution of measuring sequences for image data acquisition.