Abstract: In a method for quantitative detection of parameters in MRI, first and second spoiled gradient echo images and at least one multi-echo steady-state first/second magnetization image are acquired; based on the extended phase graph theory, signal equations are obtained corresponding to the first and second spoiled gradient echo images, the at least one multi-echo steady-state first magnetization image and the at least one multi-echo steady-state second magnetization image; based on the signal equations of the first and second spoiled gradient echo images, the signal equation of the at least one multi-echo steady-state first magnetization image and the signal equation of the at least one multi-echo steady-state second magnetization image, a spoiled gradient echo proton density map, a multi-echo steady-state proton density map, a longitudinal relaxation time map and a transverse relaxation time map of the target tissue are obtained.

Abstract: A method and device for radio-frequency field inhomogeneity correction in magnetic resonance imaging. The method includes: obtaining a first MR image by scanning a target tissue using a first pulse sequence; obtaining a B1+ field map of the target tissue; obtaining a B1?: field map of the target tissue based on the first MR image and the B1+ field map; and performing B1 field inhomogeneity correction on a second MR image of the target tissue based on the B1+ field map and the B1? field map, where the second MR image is an MR image obtained after scanning of the target tissue using any imaging protocol and any pulse sequence.

Abstract: This disclosure provides a coil array for parallel magnetic resonance imaging data acquisition, comprising: a plurality of coil elements, wherein each of the coil elements is formed by a loop of wire, wherein the plurality of coil elements are arranged such that the coil elements are covering the imaged sample and uniformly distributed over a plane comprising the encoding directions not in parallel with the frequency encoding directions, which are the directions of the static magnetic field variation generated by a plurality of gradient coils of a magnetic resonance imaging system during magnetic resonance data sampling.

Abstract: A method for detecting dynamic magnetic field distributions is provided and includes: generating a dephasing gradient magnetic field and a rephasing gradient magnetic field, wherein the dephasing and rephasing gradient magnetic fields are generated after a radio frequency pulse has been generated, and the magnetic resonance signal of the signal source sample of a magnetic field detector is acquired after the dephasing gradient magnetic field has been generated, wherein the rephasing gradient magnetic field is generated after the magnetic resonance signal of the signal source sample of the magnetic field detector has been acquired but before a magnetic resonance signal of an imaging object is acquired. The magnetic resonance signal of the signal source sample of magnetic field detectors and the magnetic resonance signal of the imaging object are obtained without interferencing between each other. Magnetic resonance images of the imaging object are corrected according the dynamic magnetic field distribution.

Abstract: This disclosure provides a coil array for parallel magnetic resonance imaging data acquisition, comprising: a plurality of coil elements, wherein each of the coil elements is formed by a loop of wire, wherein the plurality of coil elements are arranged such that the coil elements are covering the imaged sample and uniformly distributed over a plane comprising the encoding directions not in parallel with the frequency encoding directions, which are the directions of the static magnetic field variation generated by a plurality of gradient coils of a magnetic resonance imaging system during magnetic resonance data sampling.