| Title | Algorithms for extracting motion information from navigator echoes. |
| Publication Type | Journal Article |
| Year of Publication | 1996 |
| Authors | Wang Y, Grimm RC, Felmlee JP, Riederer SJ, Ehman RL |
| Journal | Magn Reson Med |
| Volume | 36 |
| Issue | 1 |
| Pagination | 117-23 |
| Date Published | 1996 Jul |
| ISSN | 0740-3194 |
| Keywords | Algorithms, Artifacts, Brain, Computer Simulation, Diaphragm, Humans, Image Enhancement, Least-Squares Analysis, Magnetic Resonance Imaging, Motion, Nose, Respiration |
| Abstract | Algorithms to reliably detect motion in navigator echoes are crucial to many MRI motion suppression techniques. The accuracy of these algorithms is affected by noise and deformation of navigator echo profile caused by physiologic motion. This study compared the performance of algorithms based on correlation and least squares for extracting displacement information from motion-monitoring navigator echoes, using computer simulation and in vivo imaging. The least squares algorithm was determined to be of higher accuracy than the correlation algorithm against errors caused by noise and profile deformation. |
| DOI | 10.1002/mrm.1910360120 |
| Alternate Journal | Magn Reson Med |
| PubMed ID | 8795030 |
| Grant List | CA51124 / CA / NCI NIH HHS / United States |
Related Institute:
MRI Research Institute (MRIRI)