Impedance matching using multiple ports

US11221385B2 · kind B2 · utility

Assignee

• KONINIKLIJKE PHILIPS N.V. · NL

Inventors

• CHRISTIAN FINDEKLKEE · Norderstedt, DE
• Christoph Leussler · Hamburg, DE
• Falk Uhlemann · Hamburg, DE
• Peter Vernickel · Hamburg, DE

Key dates

• Filing date: Oct 2, 2017
• Grant date: Jan 11, 2022
• Expiry date: Jul 10, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/3664
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention provides for a magnetic resonance imaging system (100) comprising a main magnet (104) for generating a main magnetic field within an imaging zone (108). The magnetic resonance imaging system further comprises an RF coil (114) for acquiring magnetic resonance data (164) from the imaging zone, wherein the RF coil comprises multiple RF ports (124, 412, 414, 416, 500, 502, 702, 1004, 1006). The RF coil comprises a switch unit (120) for at least one of the multiple RF ports to individually couple or uncouple the at least one of of the multiple RF ports from the RF coil. The magnetic resonance imaging system further comprises a radio-frequency system (125) for supplying radio-frequency power to each of the multiple RF ports and an RF matching detection system (122) for measuring impedance matching data (166) between the radio-frequency system and the RF coil. Execution of the machine executable instructions causes a processor controlling the magnetic resonance imaging system to measure (200, 300, 302, 304) the impedance matching data using the RF matching detection system; determine (202) switch unit control instructions (168) using the impedance matching data, wherein the …