Abstract:
:The use of phase correlation to detect rigid-body translational motion is reviewed and applied to individual echotrains in turbo-spin-echo data acquisition. It is shown that when the same echotrain is acquired twice, the subsampled correlation provides an array of delta-functions, from which the motion that occurred between the acquisitions of the two echotrains can be measured. It is shown further that a similar correlation can be found between two sets of equally spaced measurements that are adjacent in k-space. By measuring the motion between all adjacent pairs of k-space subgroups, the complete motion history of a subject can be determined and the motion artifacts in the image can be corrected. Some of the limiting factors in using this technique are investigated with turbo-spin-echo head and hand images.
journal_name
Magn Reson Medjournal_title
Magnetic resonance in medicineauthors
Mendes J,Kholmovski E,Parker DLdoi
10.1002/mrm.21883subject
Has Abstractpub_date
2009-03-01 00:00:00pages
739-47issue
3eissn
0740-3194issn
1522-2594journal_volume
61pub_type
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