| 摘要 |
<p>The invention provides for a magnetic resonance imaging system (100) for acquiring magnetic resonance data from subject using an imaging pulse sequence instructions (140), a first motion correction pulse sequence instructions (142), and a second motion correction pulse sequence instructions (144). Execution of instructions causes a processor to: acquire (202) the second k-space navigator data using the first motion correction pulse sequence instructions, acquire (204) reference tracker magnetic resonance data (148) using the second motion correction pulse sequence instructions, and reconstruct (206) a predetermined number of reference images (150) using the reference tracker magnetic resonance data. The instructions causes the processor to repeatedly: acquire (208) a portion (152) of the magnetic resonance data using the imaging pulse sequence instructions, detect (210) movement of the subject by comparing the first k-space navigator data to the second k- space navigator data, iteratively (214) correct the scan geometry if the movement of the subject is above a predetermined threshold, correct (216) the portion of magnetic resonance data if the scan geometry has been iteratively corrected. The instructions further causes the processor to reconstruct (220) a magnetic resonance image (168) from the magnetic resonance data after all portions of the magnetic resonance data have been acquired.</p> |
