Method for motion correction of emission computed tomography data by way of magnetic resonance tomography data

A combined emission computed tomography and magnetic resonance tomography device, comprising:

• a control device configured to
• record emission computed tomography data over a recording period and storing associated detection events and detection instants,
• perform seperate magnetic resonance measurements for at least two subregions of an examination region of an object to record magnetic resonance data of at least two subregions at at least two recording instants during the recording period of the emission computed tomography data,
• store the recorded magnetic resonance data and the at least two recording instants,
• determine, for each of the at least two subregions, at least one item of motion information describing a motion of a region of the examination object at a first instance relative to a position at a second instant, from magnetic resonance data recorded at the first instant and the second instant.
• determine a motion model describing motion of the examination object, for the entire examination object, from the items of motion information for the at least two subregions, and
• calculate motion-corrected emission tomography data from the detection events, the detection and the motion model.

A computer readable medium including program code segments for, when executed on a combined emission computed tomography and magnetic resonance tomography device, causing the combined emission computed tomography and magnetic resonance tomography device to perform a method comprising:

• recording emission computed tomography data over a period and storing associated detection events and detection instants;
• performing seperate magnetic resonance measurements for at least two subregions of an examination region of an examination object to record magnetic resonance data of at least two subregions at at least two recording instants during the recording period of the emission computed tomography data;
• storing the recorded magnetic resonance data and the at least two recording instants;
• determining, for each of the at least two subregions, at least one item of motion information describing a motion of a region of the examination object at a first instant relative to a position at a second instant, from magnetic resonance data recorded at the first instant and the second instant;
• determining a motion model describing motion of the examination object, for the entire examination object, from the items of motion information for the at least two subregions;
• and
• calculating motion-corrected emission tomography data from the detection events, the detection instants and the motion model.