Method and magnetic resonance apparatus for quiet echo-planar imaging

US10663544B2 · kind B2 · utility

Assignee

• Siemens Healthcare Limited · DE

Inventors

• Robin Heidemann · Strullendorf, DE
• Patrick Liebig · Erlangen, DE

Key dates

• Filing date: Mar 9, 2018
• Grant date: May 26, 2020
• Expiry date: May 28, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/4806
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In a method and magnetic resonance (MR) apparatus for echo-planar acquisition of MR images using multiple reception coils, an RF excitation pulse is radiated to generate transverse magnetization, and a temporal sequence of a readout gradient is activated with alternating positive and negative values, thereby producing MR signal echoes. Multiple phase-encoding gradients are activated in a temporal sequence with a value of the phase-encoding gradients being maximum when a value of the readout gradients is minimum, and vice versa. A time period during which a single phase-encoding gradient is applied is at least a quarter of a time interval between two MR signal echoes. The MR signal echoes are read with the multiple reception coils in a trajectory in k-space, continuously without interruption during the readout gradient. The trajectory does not completely fill k-space with raw data in an edge region according to the Nyquist condition.