Motion tracking based on fast image acquisition

摘要

A magnetic resonance imaging (MRI) system including a memory for storing machine executable instructions and a processor for controlling the magnetic resonance imaging system. The MRI system for performing a plurality of MRI scans for acquiring magnetic resonance data from a target volume of a patient in accordance with respective predefined scan geometries. The execution of the machine executable instructions causes the processor to control the MRI system to at least: perform a first calibration scan; perform a second calibration scan; generate geometry transformation data; determine a deviation of the target volume caused by a movement of the patient; update each of the predefined scan geometries and the second scan geometry as a function of the geometry transformation data; and perform at least one MRI scan of the plurality of MRI scans to acquire image data in accordance with the respective updated predefined scan geometry.

主权项

1. A magnetic resonance imaging (MRI) system for performing a plurality of MRI scans for acquiring magnetic resonance data from a target volume of a patient in accordance with respective predefined scan geometries, wherein a scan geometry refers to positional information that describes the target volume, the magnetic resonance imaging system comprising a non-transitory memory for storing machine executable instructions and a processor for controlling the magnetic resonance imaging system, wherein execution of the machine executable instructions causes the processor to:
a. control the MRI system to perform a first calibration scan for acquiring first image data from the target volume in accordance with a first scan geometry, wherein the first calibration scan comprises a first set of two-dimensional scans performed in respective first crossing slices, wherein the first set of two dimensional scans comprises at least two two-dimensional scans; b. control the MRI system to perform a second calibration scan comprising a second set of two-dimensional scans performed in respective second crossing slices to acquire second image data of the target volume in accordance with a second scan geometry; c. generate geometry transformation data by registering the second image data relative to the first image data; d. determine a deviation of the target volume caused by a movement of the patient using the geometry transformation data; e. update each of the predefined scan geometries and the second scan geometry as a function of the geometry transformation data; f. repeat steps b to e until the determined deviation of the target volume satisfies a termination criterion; g. control the MRI system to perform at least one MRI scan of the plurality of MRI scans to acquire image data in accordance with the respective updated predefined scan geometry; and h. repeat steps b to g for performing the plurality of MRI scans.