DocumentCode :
2706832
Title :
Active contours: an overview with applications to motion artifact cancellation in MRI
Author :
Guidry, Diana L. ; Farag, Aly A.
Author_Institution :
Dept. of Electr. Eng., Louisville Univ., KY, USA
Volume :
6
fYear :
1999
fDate :
15-19 Mar 1999
Firstpage :
3425
Abstract :
Motion can be estimated by detecting the edges of a moving object using active contours, and registering them together to obtain the motion model parameters. This idea can be applied to patient motion during the acquisition of an MRI to eliminate motion artifacts in the image. The data obtained during the MRI acquisition, the k-space, can be divided into several subbands such that each subband is acquired in a small fraction of the full imaging time. These subbands create invariant tissue feature maps called subband images. Using active contours, the relative motion is analyzed across the different subband images to determine the motion parameters. Using these motion parameters it is possible to correct the subbands, thus correcting the k-space. This has the potential to yield clear, noise-free MR images
Keywords :
biomedical MRI; edge detection; image registration; interference suppression; medical image processing; motion estimation; MRI; active contours; edges; k-space; motion artifact cancellation; motion model parameters; motion parameters; moving object; patient motion; registration; relative motion; subband; tissue feature maps; Active contours; Application software; Computer vision; Gray-scale; Image edge detection; Magnetic resonance imaging; Motion analysis; Motion detection; Motion estimation; Object detection;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1999. Proceedings., 1999 IEEE International Conference on
Conference_Location :
Phoenix, AZ
ISSN :
1520-6149
Print_ISBN :
0-7803-5041-3
Type :
conf
DOI :
10.1109/ICASSP.1999.757578
Filename :
757578
Link To Document :
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