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.
Keywords