MR system with improved protection against cardiac stimulation

US11567154B2 · kind B2 · utility

Assignee

• Siemens Healthcare Limited · DE

Inventors

• Helmut Lenz · Tutzing, DE
• Lennart Kilian · Gauting, DE
• Daniel Niederlöhner · Erlangen, DE
• Dirk Schneiderbanger · Langensendelbach, DE

Key dates

• Filing date: Dec 3, 2021
• Grant date: Jan 31, 2023
• Expiry date: Dec 3, 2041

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03F2200/451
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for operating an MR system with a gradient power amplifier having at least one output stage that is connectable to a gradient coil, and having four switching elements connected to one another as an H-bridge includes, to operate the gradient coil, in alternation: switching the switching elements attached to a common first pole of a voltage supply to conductive and switching the switching elements attached to a common second pole of a voltage supply to blocking by inverting power drivers; and switching the switching elements attached to a common first pole of a voltage supply to blocking and switching the switching elements attached to a common second pole of a voltage supply to conductive by inverting power drivers. The switching elements attached to the first pole are switched by non-inverting power drivers, and the switching elements attached to the second pole are switched by inverting power drivers.