Chaiya Luengviriya1,2, Jian Yun1, Oliver Speck1
1Department of Biomedical Magnetic Resonance, Otto-von-Guericke University, Magdeburg, Germany; 2Department of Physics, Kasetsart University, Bangkok, Thailand
Real-time prospective correction is a very promising method to avoid image quality degradation caused by subject motion in MRI of human brain. The inaccuracy of measured motion data is limiting the efficiency. Simulations showed that residual motion artifacts after a prospective correction increased with the level of inaccuracy. Even for an ideal accurate case, artifacts can appear in multi-channel MRI because of coil sensitivity map errors. A retrospective correction was proposed and showed that the image quality can be further improved, especially for strong motion. In all cases, smooth motion resulted in fewer artifacts than abrupt motion.