Synopsis

This lecture describes the most common artifacts found on preclinical MRI scanners related to acquisition, image formation, hardware, sequence specific issues and physiological properties. It starts with a brief review of k-space and image formation, then it describes the physical principles of various artifacts, provides examples of preclinical images specifically acquired to show them and discusses different strategies to mitigate artifacts, both at the acquisition and data post-processing level. Some of the artifacts covered in this lecture are aliasing, chemical shift, Gibbs ringing, field inhomogeneities, Eddy currents, ghosts, susceptibility artifacts and motion.