Patent ID: 11906607
Assignee: KONINKLIJKE PHILIPS N.V.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 3:
4. A magnetic resonance (MR) device comprising:
at least one main magnet coil for generating a uniform, static magnetic field within an examination volume;
a number 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 a temporal succession of RF pulses and switched magnetic field gradients, wherein the control unit is configured to:
specify a set of radial k-space spokes to cover a spherical k-space volume, such that spokes of the set of radial k-space spokes are between a k-space origin and end points distributed on a surface of the spherical k-space volume;
select subsets of a predetermined number of spokes from the specified set radial k-space spokes so that concatenation of the spokes in each of the subsets forms a closed trajectory in k-space, wherein selecting the subsets is based on a cost function is based on optimizing a cost function favouring (i) minimizing a maximum angle between subsequently acquired spokes within the same subset, (ii) maximizing the uniformity of the distribution of the end points of the spokes on the surface of the spherical k-space volume, while ensuring that the concatenation of the spokes of the subsets forms the closed trajectory in k-space; and
perform a zero echo time imaging sequence of the object, wherein each of the subsets is acquired as a sequence of gradient echo signals;

a reconstruction unit configured to reconstruct an MR image from the acquired spokes; and
a video monitor configured to provide a human-readable display of the reconstructed MR image.