Patent ID: 11963754
Assignee: SIEMENS HEALTHINEERS AG
Field: Measurement (Instruments)
Classification: CPC A  G | IPC A  G

Claim 0:
1. A method for producing scan data from an examination object, the method comprising:
reading out a k-space which corresponds to a mapping area of the scan data, by:
a) switching a constant gradient using a gradient field generator of a magnetic resonance system;
b) irradiating an RF excitation pulse using an RF transmitter/receiver of the magnetic resonance system;
c) following a time t1 after the last irradiated RF excitation pulse, recording echo signals using the RF transmitter/receiver; and
d) storing the recorded echo signals as scan data along a trajectory in k-space predetermined by a strength of the switched gradient,
wherein the steps a) to d) are carried out repeatedly with various switched constant gradients, and the various gradients are switched in at least two phase encoding directions, and
wherein at least once following the time t1 after the last switched RF excitation pulse, additional gradients with a modulating amplitude are switched in at least one direction which is oriented at right angles to a direction predetermined by the already switched constant gradients, until the k-space corresponding to the mapping area is read out in a first region which depends on the time t1; and
e) reading out the k-space corresponding to the mapping area, which is not covered by the first region of the k-space and which comprises at least a k-space center, differently to that described by steps a) to d), and storing this scan data; and
reconstructing image data from the stored scan data of the k-space using a control facility of the magnetic resonance system.