Magnetic resonance method and apparatus with reduction of artifacts by a combination of SPAIR pulse and saturation pulse

US10598746B2 · kind B2 · utility

Assignee

• Siemens Healthcare Limited · DE

Inventors

• Simon Bauer · Baunach, DE
• Ralf Kartaeusch · Erlangen, DE
• Joerg Roland · Hemhofen, DE

Key dates

• Filing date: May 7, 2018
• Grant date: Mar 24, 2020
• Expiry date: Sep 15, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/56563
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

For reduction of artifacts when acquiring magnetic resonance (MR) data using an MR apparatus, a SPAR pulse, which acts on spins in a first predetermined frequency range, and a saturation pulse, which acts on spins in a second predetermined frequency range, are radiated. A gradient for spatial encoding is activated at the same time as the saturation pulse, so that the saturation pulse acts on an edge region adjacent to the volume segment. The edge region borders an ellipsoidal useful volume of the scanner of the MR apparatus, in which the strength of the B0 field changes in terms of magnitude by no more than 30 ppm. Spoiler gradients are activated to destroy a transverse magnetization, before an RF excitation pulse, adjusted to the SPAIR pulse, is radiated. MR data are acquired after the SPAIR pulse, the saturation pulse and the RF excitation pulse. The second frequency range is adjusted to the first frequency range.