Dear Amni
To avoid T1 effects and to make things a lot easier, I would recommend
retrospective gating instead see Glover et al 2000 and Lund et al
2006. You will need to record, and store the cardiac recordings in
order to use this method.
Hope this helps
Torben
@article{Glover2000,
Author = {G. H. Glover and T. Q. Li and D. Ress},
Date-Modified = {2007-08-17 11:26:32 +0200},
Journal = {Magn Reson Med},
Local-Url = {file://localhost/Users/torbenl/PDF_articles/fMRI-noise-RETROICOR-Glover2000.pdf
},
Month = {7},
Pages = {162--7},
Title = {Image-based method for retrospective correction of
physiological motion effects in {fMRI}: {RETROICOR}},
Volume = {44},
Year = {2000}}
@article{Lund2006,
Author = {Lund, Torben E and Madsen, Kristoffer H and Sidaros, Karam
and Luo, Wen-Lin and Nichols, Thomas E},
Journal = {Neuroimage},
Number = {1},
Pages = {54--66},
Title = {Non-white noise in {fMRI}: does modelling have an impact?},
Volume = {29},
Year = {2006}}
Torben Ellegaard Lund
Assistant Professor, PhD
The Danish National Research Foundation's Center for Functionally
Integrative Neuroscience (CFIN)
Aarhus University
Aarhus University Hospital
Building 30
Noerrebrogade 44
8000 Aarhus C
Denmark
Phone: +4589494380
Fax: +4589494400
http://www.cfin.au.dk
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Den 11/11/2008 kl. 05.29 skrev SUBSCRIBE SPM amni:
> Hello
>
> Can anyone recommend a source (web page, journal article or book
> etc.) that
> informs on methods and analyses of cardiac gating synchronize with mri
> signals for sparse temporal sampling in auditory fMRI?
>
> RR intervals = TR, Which RR interval (ms) = 60000/Heartrate (bpm).
> So if i need longer TR, TR=16000 ms, multiple intergers of the RR
> interval will
> be selected?
>
> so i will capture the signals at any intergers of the RR interval?
>
> Thanks
>
> amni
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