MR system with improved protection against cardiostimulation

US11614507B2 · 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 17, 2021
• Grant date: Mar 28, 2023
• Expiry date: Dec 17, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/3607
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for operating an MR system with a gradient pulse amplifier unit that has an end stage connected to a gradient coil with switching elements is provided. The gradient pulse amplifier unit includes a modulator for actuating the switching elements, and lockout switches interconnected in signal paths from the modulator to the switching elements. The gradient pulse amplifier unit includes feeder circuit breakers interconnected in at least some signal paths from the modulator to the switching elements. The circuit breakers are connected in the associated signal paths downstream of the lockout switches. A gradstop unit configured to receive at least one shut-off signal and actuate the lockout switches and the feeder circuit breakers. When the gradstop unit receives a shut-off signal, the gradstop unit actuates the lockout switches to lock out and the feeder circuit breakers to output an actuation signal to the switching elements.