Patent ID: 11874358
Assignee: WISCONSIN ALUMNI RESEARCH FOUNDATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 22:
23. A method for controlling a magnetic resonance imaging (MRI) system, the method comprising:
performing a gradient echo pulse sequence that includes a phase increment of an RF pulse of the gradient echo pulse sequence selected to encode diffusion information into a phase of MR signals;
controlling the plurality of gradient coils and the RF system to acquire the MR signals as MR data;
processing the MR data to determine MR signals corresponding to diffusion in the subject when acquiring the MR signals; and
generating at least one of an image or a map of the subject indicating the diffusion in the subject from the MR data;
performing multiple repetitions of the gradient echo pulse sequence with differing phase increments and identifying linear or quadratic phase change between the multiple repetitions corresponding to artifacts along a phase-encoding direction in the MR data; and
further comprising evaluating artifacts in the at least one of the image or the map of the subject by evaluating a sidelobe-to-peak ratio (SPR) of a point spread function (PSF).