Patent ID: 11914016
Assignee: KONINKLIJKE PHILIPS N.V.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 1:
2. A magnetic resonance (MR) device including at least one main magnet coil for generating a uniform, steady magnetic field B0 within an examination volume, a plurality of gradient coils for generating switched magnetic field gradients in different spatial directions within the examination volume, at least one RF coil for generating RF pulses within the examination volume and/or for receiving MR signals from an object positioned in the examination volume, a control unit for controlling temporal succession of RF pulses and switched magnetic field gradients, and a reconstruction unit for reconstructing MR images from the received MR signals, wherein the MR device is arranged to:
a) generate MR signals by subjecting the object to a 3D radial imaging sequence comprising RF pulses and switched magnetic field gradients defining an field-of-view and including a number of shots of a multi-echo imaging sequence, each shot comprising an RF excitation pulse followed by a number of refocusing magnetic field gradients or refocusing RF pulses to generate a train of MR echo signals in rapid succession, wherein each MR echo signal corresponds to one k-space profile and wherein k-space profiles from one k-space segment are acquired during one shot of the multi-echo imaging sequence, with a different k-space segment being associated with each shot;
b) for an individual k-space segment acquire the MR signals as radial k-space profiles for a first group of k-space profiles at a first rotation angle and subsequently for a second group of k-space profiles at a second rotation angle, wherein the second rotation angle is incremented relative to the first rotation angle by a minimal angle φ to fulfill Nyquist criterion according to the field-of-view, and wherein the k-space profiles of the first and second groups are acquired in opposite directions; and
c) reconstruct an MR image from the acquired MR signals.