Patent ID: 11927659
Assignee: ZHEJIANG UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 1:
2. The method for frequency drift correction of magnetic resonance CEST imaging according to claim 1, the value of a main magnetic field frequency drift in step S21 is calculated by:
dividing the single line of free induction decay signal into odd-numbered lines defined by the odd sampling points data of the free induction decay signal and even-numbered lines defined by the even sampling points data of the free induction decay signal;
calculating a representative value of phase differences of corresponding sampling points in the odd-numbered lines and the even-numbered lines as an inter-line phase difference between odd-numbered lines and even-numbered lines; and
calculating the value of a main magnetic field frequency drift from the inter-line phase difference and the sampling period,
wherein the representative value comprises an arithmetic mean or a median.