Pre-emphasis techniques based on temperature dependent gradient system behavior for trajectory correction in magnetic resonance imaging

A method of imaging a patient using a magnetic resonance (MR) device, the method comprising:

• measuring a temperature of at least one gradient coil of the MR device using at least one temperature sensor associated with the respective gradient coil;
• determining, using a processor of the MR device, a gradient system characterization function for the at least one gradient coil based on the measured temperature of the respective gradient coil;
• calculating a pre-emphasized gradient for the at least one gradient coil using the determined gradient system characterization function;
• and
• imaging the patient using the pre-emphasized gradient.

A magnetic resonance (MR) device comprising:

• a plurality of gradient coils having a first gradient coil for an x-axis, a second gradient coil for a y-axis, and a third gradient coil for a z-axis of the MR device;
• at least one temperature sensor for each gradient coil of the plurality of gradient coils, the at least one temperature sensor configured to monitor a temperature of the respective gradient coil;
• at least one processor configured to set at least one gradient coil to a target temperature, measure a behavior of the MR device for the at least one gradient coil at different frequencies generated by varying current through the at least one gradient coil, and develop at least one characterization function for the at least one gradient coil at the target temperature based on the measured behavior;
• and
• a database or non-transitory memory configured to store the at least one characterization function of the at least one gradient coil of the plurality of gradient coils.