DATA ACQUISITION METHOD OF COMPENSATION FOR MAGNETIC FIELD DRIFT, METHOD OF COMPENSATION FOR MAGNETIC FIELD DRIFT, AND MRI APPARATUS

摘要

PURPOSE: A data acquisition method, method of compensation for magnetic field drift, and MRI apparatus is provided to achieve an improvement of the image quality by compensating for the magnetic field drift and reduction of overall scanning time. CONSTITUTION: A data acquisition method comprises, N > M>= 2, where N is the number of repetition of pulse sequences for gathering imaging data, M is the total number of repetition of pulse sequences for gathering data for magnetic field compensation; a first step(S1) of clearing imaging data acquisition counter I to be initialized to '1'; a second step(S2) of clearing compensation data acquisition counter for magnetic field drift D to be initialized to '1'; a third step(S3) of gathering 'I'th imaging data by using imaging data acquisition pulse sequences; a fourth step(S4) of judging whether I = D . N / M is true or not, proceeding to the a step(S5) if true, and proceeding to a step(S7) if false; a fifth step(S5) of gathering 'D'th compensation data for magnetic field drift by using the pulse sequences of compensation data acquisition for magnetic field drift; a sixth step(S6) of incrementing the compensation data acquisition counter for magnetic field drift D by '1'; a seventh step(S7) of terminating the process if I = N is true, and proceeding to a step(S8) if false; and a step(S8) of incrementing the imaging data acquisition counter I by '1'.