US 12,140,653 B2
Dixon-type water/fat separation MR imaging
Holger Eggers, Ellerhoop (DE)
Assigned to Koninklijke Philips N.V., Eindhoven (NL)
Appl. No. 17/641,829
Filed by KONINKLIJKE PHILIPS N.V., Eindhoven (NL)
PCT Filed Sep. 11, 2020, PCT No. PCT/EP2020/075444
§ 371(c)(1), (2) Date Mar. 10, 2022,
PCT Pub. No. WO2021/052882, PCT Pub. Date Mar. 25, 2021.
Claims priority of application No. 19197456 (EP), filed on Sep. 16, 2019.
Prior Publication US 2022/0390538 A1, Dec. 8, 2022
Int. Cl. G01V 3/00 (2006.01); G01R 33/48 (2006.01); G01R 33/485 (2006.01); G01R 33/56 (2006.01); G01R 33/561 (2006.01)
CPC G01R 33/4828 (2013.01) [G01R 33/485 (2013.01); G01R 33/5608 (2013.01); G01R 33/5611 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method of magnetic resonance (MR) imaging of an object placed in an examination volume of an MR device the method comprising:
subjecting the object to a dual-acquisition gradient-echo imaging sequence comprising a series of temporally equidistant RF excitations, wherein one gradient echo is generated in each repetition time between successive RF excitations with the echo time alternating between a first and a second value (TE1, TE2), and wherein phase-encoding magnetic field gradients (P, S) are switched in each repetition time to sample a pre-defined region of k-space;
acquiring echo signals from the object, wherein each gradient echo associated with either the first or the second echo time value (TE1, TE2) is sampled as a partial echo, wherein the duration of the re-phasing lobe of the readout magnetic field gradient associated with the partially sampled echo is increased as compared to the duration of the re-phasing lobe of the readout magnetic field gradient associated with its corresponding fully sampled echo;
and
reconstructing an MR image from the acquired echo signals, whereby signal contributions from water and fat are separated.