Abstract：
:When time-varying gradients are used for imaging, the off-resonance behavior does not just cause geometric distortion as is the case with spin-warp imaging, but changes the shape of the impulse response and causes blurring. This effect is well known for projection reconstruction and spiral k-space scanning sequences. The authors introduce a reconstruction and homogeneity correction method to correct for the zeroth order effects of inhomogeneity using prior knowledge of the inhomogeneity. In this method, the data are segmented according to collection time, reconstructed using some fast, linear algorithm, correlated for inhomogeneity, and then superimposed to yield a homogeneity corrected image. This segmented method is compared to a conjugate phase reconstruction in terms of degree of correction and execution time. The authors apply this method to in vivo images using projection-reconstruction and spiral-scan sequences.
journal_name
IEEE Trans Med Imagingjournal_title
IEEE transactions on medical imagingauthors
Noll DC,Meyer CH,Pauly JM,Nishimura DG,Macovski Adoi
10.1109/42.108599subject
Has Abstractpub_date
1991-01-01 00:00:00pages
629-37issue
4eissn
0278-0062issn
1558-254Xjournal_volume
10pub_type
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journal_title：IEEE transactions on medical imaging
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pub_type： 临床试验,杂志文章
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journal_title：IEEE transactions on medical imaging
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