US 12,265,143 B2
Magnetic resonance imaging with zero echo time and slice selection
Fernando Galve Conde, Valencia (ES); José Miguel Algarín Guisado, Valencia (ES); José Borreguero Morata, Valencia (ES); José María Benlloch Baviera, Valencia (ES); and Joseba Alonso Otamendi, Valencia (ES)
Assigned to CONSEJO SUPERIOR DE INVESTIGACIONES CIENTÍFICAS (CSIC), Madrid (ES); and UNIVERSITAT POLITÉCNICA DE VALENCIA, Valencia (ES)
Appl. No. 17/928,485
Filed by CONSEJO SUPERIOR DE INVESTIGACIONES CIENTÍFICAS (CSIC), Madrid (ES); and UNIVERSITAT POLITÉCNICA DE VALÈNCIA, Valencia (ES)
PCT Filed May 31, 2021, PCT No. PCT/EP2021/064543
§ 371(c)(1), (2) Date Nov. 29, 2022,
PCT Pub. No. WO2021/245024, PCT Pub. Date Dec. 9, 2021.
Claims priority of application No. ES202030504 (ES), filed on Jun. 1, 2020.
Prior Publication US 2023/0204698 A1, Jun. 29, 2023
Int. Cl. G01R 33/48 (2006.01); G01R 33/50 (2006.01)
CPC G01R 33/4816 (2013.01) [G01R 33/4818 (2013.01); G01R 33/50 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A magnetic resonance imaging, MRI, method comprising a sample set in a magnetic field, B0, along a longitudinal direction so that the magnetization of the sample is initially parallel to said direction of the magnetic field, wherein said method comprises performing an imaging scan of a sample based on a ZTE sequence,
the imaging scan comprising the following steps:
a) applying a slice selection gradient pulse, GSS, followed by at least one radio frequency excitation pulse generating a transverse magnetization of the sample with respect to the direction of B0;
b) applying a slice selection pulse sequence comprising at least one rf pulse for selective locking of sample magnetization corresponding to a single 2D slice of the sample;
c) applying a preservation pulse sequence comprising at least one rf pulse, for keeping magnetization coherence of the selected 2D slice, and additionally comprising the termination of GSS and the onset of a readout gradient pulse, Gro;
d) performing the encoding, readout, and acquisition of the FID signal of a sample radial spoke defined by Gro;
e) repeating the steps (a-d) along a plurality of readout directions in order to gather a corresponding number of radial spokes in the k-space plane, corresponding to the 2D slice of the sample;
f) processing the FID signals gathered in steps a)-e) and reconstructing an image of the 2D slice of the sample.