We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Navigator accuracy requirements for prospective motion correction.
- Authors
Maclaren, Julian; Speck, Oliver; Stucht, Daniel; Schulze, Peter; Hennig, Jürgen; Zaitsev, Maxim
- Abstract
Prospective motion correction in MRI is becoming increasingly popular to prevent the image artifacts that result from subject motion. Navigator information is used to update the position of the imaging volume before every spin excitation so that lines of acquired k-space data are consistent. Errors in the navigator information, however, result in residual errors in each k-space line. This paper presents an analysis linking noise in the tracking system to the power of the resulting image artifacts. An expression is formulated for the required navigator accuracy based on the properties of the imaged object and the desired resolution. Analytical results are compared with computer simulations and experimental data. Magn Reson Med, 2010. © 2009 Wiley-Liss, Inc.
- Publication
Magnetic Resonance in Medicine, 2010, Vol 63, Issue 1, p162
- ISSN
0740-3194
- Publication type
Article
- DOI
10.1002/mrm.22191