Motion compensated MR imaging system

摘要

A method provides motion corrected MR image data in an MR imaging system. The method employs an imaging method for acquiring k-space data of a k-space data array during an imaging scan and the k-space data represents image data of a patient anatomical region. The method acquires k-space data associated with a central region of the k-space data array and subsequently acquires k-space data external to the central region of the k-space data array. The method acquires a motion signal indicating respiratory motion at least during the acquisition of the k-space data external to the central region and compares the motion signal with a predetermined threshold. The method identifies acquired k-space data corresponding to acquisition periods when the motion signal exceeds the threshold and excludes use of the identified acquired k-space data in image reconstruction using the remaining acquired k-space data.

主权项

1. A method for providing motion corrected MR image data in an MR imaging system, comprising the steps of:
employing an imaging method for acquiring k-space data of a k-space data array during an imaging scan,
a) by acquiring k-space data associated with a central region of the k-space data array andb) subsequently acquiring k-space data external to said central region of the k-space data array, said k-space data representing image data of a patient anatomical region; acquiring a motion signal indicating respiratory motion at least during the acquisition of said k-space data external to said central region; comparing said motion signal with a predetermined threshold; identifying acquired k-space data corresponding to acquisition periods when said motion signal exceeds said threshold; and excluding use of the identified acquired k-space data in image reconstruction using the remaining acquired k-space data.