Detecting subject motion in medical imaging

A system for detecting subject motion in medical imaging of a subject, the system comprising:

• an interface component adapted to obtain a motion classification model representing relationships between motion of image features and subject motion values;
• a feature extraction component adapted, for each of a plurality of medical slice images of an imaged volume of the subject, to extract an image feature of the medical slice image;
• a data processing component adapted to determine motion information for the image feature based on the extracted image feature for each of the plurality of medical slice images, the motion information representing motion of the image feature in the imaged volume of the subject;
• and
• a motion determination component adapted to determine a subject motion value based on the motion information for the image feature and the obtained motion classification model.