Method for exciting nuclear spins

US12265144B2 · kind B2 · utility

Assignee

• Siemens Healthineers AG · DE

Inventors

• Jürgen Herrler · Erlangen, DE
• Patrick Liebig · Erlangen, DE
• Rene Gumbrecht · Herzogenaurach, DE
• Armin Nagel · Böbingen an der Rems, DE

Key dates

• Filing date: Jan 30, 2023
• Grant date: Apr 1, 2025
• Expiry date: Jul 2, 2043

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/4833
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Nuclear spins are excited in a region of interest in an object under examination by a radio-frequency pulse. During at least one phase of the radio-frequency pulse, excitation fields are transmitted while magnetic field gradients are simultaneously applied so that the magnetization of the nuclear spins moves on a trajectory through a transmission k-space. In a first phase of the at least one phase of the radio-frequency pulse, the trajectory moves at a radial distance around the center of the transmission k-space. The radial distance corresponds to the radius of a sphere superimposed with at least one radial harmonic.