Patent ID: 11918335
Assignee: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY
Field: Measurement (Instruments)
Classification: CPC A  G | IPC A  G

Claim 10:
11. The magnetic resonance imaging apparatus according to claim 9, wherein
the two-dimensional mapping data comprises a first two-dimensional mapping data of the target object collected based on a second three-dimensional magnetic resonance imaging sequence, a second two-dimensional mapping data of the target object collected based on a third three-dimensional magnetic resonance imaging sequence, a third two-dimensional mapping data of the target object collected based on a fourth three-dimensional magnetic resonance imaging sequence, and a fourth two-dimensional mapping data of the target object collected based on a fifth three-dimensional magnetic resonance imaging sequence;
the second three-dimensional magnetic resonance imaging sequence comprises the first sinusoidal gradient field and a first gradient field on the phase direction; the third three-dimensional magnetic resonance imaging sequence comprises the first gradient field on the phase direction; the fourth three-dimensional magnetic resonance imaging sequence comprises the second sinusoidal gradient field and the first gradient field on the layer selection direction; the fifth three-dimensional magnetic resonance imaging sequence comprises the first gradient field on the layer selection direction; and
when calculating and obtaining the three-dimensional point spread function based on the two-dimensional mapping data of the target object, the processor is configured to execute the instruction and work with the non-transitory memory cooperatively to further perform operations of:
dividing the first two-dimensional mapping data by the second two-dimensional mapping data to obtain a two-dimensional point spread function of the phase direction;
dividing the third two-dimensional mapping data by the fourth two-dimensional mapping data to obtain a two-dimensional point spread function of the layer selection direction; and
obtaining the three-dimensional point spread function based on the two-dimensional point spread function of the phase direction and the two-dimensional point spread function of the layer selection direction.