Dear SPM:
We have been reviewing some of our MRI acquisition procedures and wonder if there are any opinions
on the slice acquisition orders. We have typically used an interleaved sequence (1,3,...N)
(2,4,...N-1) or similar. The thinking is that this is best for signal to noise particularly for
slices with no gap (3 mm slices). Are there advantages/disadvantages to using other acquisition
schemes - ascending or descending? In that case perhaps a gap should be added?
Are other schemes better for slice timing correction or avoiding it, or for analyses that include
measures of connectivity- e.g., DCM?
thanks,
darren
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Darren R. Gitelman, M.D.
Cognitive Neurology and the Alzheimer's Disease Center
Northwestern Univ., 320 E. Superior St., Searle 11-470, Chicago, IL 60611
Voice: (312) 908-9023 Fax: (312) 908-8789
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