Paper Info
Title
Correction of translation-induced artifacts in wrist MRI scans using orthogonal acquisitions
Abstract
Correction of motion artifacts in MRI due to interview in-plane 2-D rigid body translations is possible using only the raw data of two standard 2DFT images acquired of the same object with phase encode direction swapped. Previous techniques simply use multiple or orthogonal images to reduce artifacts by ghost interference or geometric averaging. The orthogonal k-space phase difference (ORKPHAD) provides an overdetermined system of linear equations that can be solved directly to compensate for the phase errors caused by the translation. This technique was used to correct images of a volunteer's moving wrist. For all slices of the motion corrupted data volumes, artifacts were dramatically reduced. Though the algorithm only accounts for interview translational motion, it is robust enough to correct real in vivo images that may also be corrupted by small amounts of rotational or out-of-plane motion. Experiments underway show the algorithm can tolerate bulk rotation of several degrees between orthogonal image pairs and that corrections using fractional NEX scans are possible. The current results and such ongoing advancements should make this correction technique practical for certain clinical scenarios vulnerable to in-plane translation.
Year
DOI
Venue
2002
10.1117/12.467174
Proceedings of SPIE
Keywords
Field
DocType
MRI,motion correction,motion artifacts,orthogonal acquisitions
Computer vision,Linear equation,Overdetermined system,Wrist,Rigid body,Interference (wave propagation),Artificial intelligence,Translational motion,Motion correction,Mathematics
Conference
Volume
ISSN
Citations 
4684
0277-786X
0
PageRank 
References 
Authors
0.34
0
2
Name
Order
Citations
PageRank
E. Brian Welch14516.66
Armando Manduca230360.99