## Abstract Echo‐planar imaging (EPI) commonly suffers from ghosting artifacts caused by zero‐ or first‐order phase differences between the odd and even echoes that constitute an EPI dataset. Small‐bore imaging systems with shielded gradients may suffer significantly from cross‐term eddy currents d
Elimination of nyquist ghosts in MRI by using fast linogram imaging
✍ Scribed by Neville Gai; Leon Axel
- Book ID
- 102905561
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 743 KB
- Volume
- 7
- Category
- Article
- ISSN
- 1053-1807
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Timing inaccuracies between the even and odd echoes lead to the formation of Nyquist ghosts in conventional (blipped) echo‐planar imaging (EPI). A fast radial scanning method based on the linogram sampling geometry was designed and implemented. No ghosting effects are seen with this scheme, and correction for timing inaccuracies is performed using simple postprocessing steps before reconstruction.
📜 SIMILAR VOLUMES
## Abstract ## Purpose To develop a method that automatically corrects ghosting artifacts due to echo‐misalignment in interleaved gradient‐echo echo‐planar imaging (EPI) in arbitrary oblique or double‐oblique scan planes. ## Materials and Methods An automatic ghosting correction technique was de