US 11,927,660 B2
Method for measuring motion of an object to be imaged in a medical imaging method
Richard Buschbeck, Cologne (DE); and Nadim Joni Shah, Jülich (DE)
Assigned to FORSCHUNGSZENTRUM JÜLICH GMBH, Jülich (DE)
Appl. No. 17/042,459
Filed by FORSCHUNGSZENTRUM JÜLICH GMBH, Jülich (DE)
PCT Filed May 22, 2019, PCT No. PCT/EP2019/063175
§ 371(c)(1), (2) Date Sep. 28, 2020,
PCT Pub. No. WO2019/224229, PCT Pub. Date Nov. 28, 2019.
Claims priority of application No. 10 2018 208 220.0 (DE), filed on May 24, 2018.
Prior Publication US 2021/0011105 A1, Jan. 14, 2021
Int. Cl. G01R 33/567 (2006.01); G01R 33/565 (2006.01)
CPC G01R 33/5676 (2013.01) [G01R 33/56509 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for determining one or more movements of an object to be imaged in a medical imaging method, said medical imaging method comprising at least Magnetic Resonance Imaging, wherein the method comprises steps of:
determining a first set of functions based on first navigator data of the object, and determining first coefficients of the first set of functions, wherein the first navigator data is recorded by a magnetic resonance tomograph using a first spherical Lissajous navigator in k-space with kr<0.2/cm, wherein kr represents an absolute value of the wave vector k,
determining a second set of functions based on second navigator data of the object, and determining second coefficients of the second set of functions, wherein the second navigator data is recorded by the magnetic resonance tomograph using a second spherical Lissajous navigator in the k-space with kr<0.2/cm, wherein kr represents the absolute value of the wave vector k,
calculating a rotation of the object based on the first coefficients and the second coefficients, wherein calculating the rotation comprises determining a relationship between each first coefficient in the first coefficients and each second coefficient in the second coefficients, said relationship governed by a rotation matrix selected from one of: an Euler rotation matrix and a Wigner rotation matrix, and
adjusting a recording area of the magnetic resonance tomograph based on the rotation of the object.