Hi all,
here my solution to the Multiband Slice timing. I have changed the code
so that for multi band the slice order is an array where each row give
the slices which are measured at the same timepoint
% Multi-Band: array
% [ [ 1 4] same timepoint 1
% [ 3 6] same timepoint 2
% [ 2 5] ] same timepoint 3
Hope it works also for you.
Regards,
Michael
Am 02.06.2014 15:57, schrieb Torben Lund:
> That is right. Looking at the code it seems that nslices is rather
> fundamental for the way the code works, and that extra matlab coding
> will be needed. You could either rewrite the spm_slicetiming.m code or
> alternatively split each of the current volumes into (in our example)
> three volumes, and perform the correction on each of the segments
> seperately, and then after the correction merge the volumes again. Much
> better would of course be a slice specific designmatrix in which case
> this would not be a problem.
>
> Best
> Torben
>
>
> Torben Ellegaard Lund
> Associate Professor, PhD
> Center of Functionally Integrative Neuroscience (CFIN)
> Aarhus University
> Aarhus University Hospital
> Building 10G, 5th floor, room 31
> Noerrebrogade 44
> 8000 Aarhus C
> Denmark
> Phone: +45 7846 4380
> Fax: +45 7846 4400
> http://www.cfin.au.dk <http://www.cfin.au.dk/>
> [log in to unmask] <mailto:[log in to unmask]>
>
>
>
>
>
> Den Uge:23 02/06/2014 kl. 13.37 skrev Rajat Thomas <[log in to unmask]
> <mailto:[log in to unmask]>>:
>
>> Hi Torben,
>>
>> Thank you for your suggestion. I think it is a good compromise because
>> in this case for example, 1 3 5 which should be offset by zero
>> (because its acquired simultaneously) but will be offset by TR/15
>> (using default SPM). Indeed for TRs < 1s, this would be negligible.
>>
>> Cheers,
>>
>> Rajat
>>
>>
>>
>> Rajat Mani Thomas
>> Social Brain Lab
>> Netherlands Institute for Neuroscience
>> Amsterdam
>> ------------------------------------------------------------------------
>> *From:*Torben Lund <[log in to unmask] <mailto:[log in to unmask]>>
>> *Sent:*02 June 2014 11:48
>> *To:*Rajat Thomas
>> *Cc:*spm Parametric Mapping)
>> *Subject:*Re: [SPM] Multiband Slice timing
>> Hi Rajat
>>
>> This is a wild guess which I have not testet, but have you tried
>> a sliceorder vector which reflects the situation e.g. with 15 slices
>> and multislice acceleration of 3 [1 3 5 2 4 1 3 5 2 4 1 3 5 2 4 ]
>>
>> Best
>> Torben
>>
>>
>> Torben Ellegaard Lund
>> Associate Professor, PhD
>> Center of Functionally Integrative Neuroscience (CFIN)
>> Aarhus University
>> Aarhus University Hospital
>> Building 10G, 5th floor, room 31
>> Noerrebrogade 44
>> 8000 Aarhus C
>> Denmark
>> Phone: +45 7846 4380
>> Fax: +45 7846 4400
>> http://www.cfin.au.dk <http://www.cfin.au.dk/>
>> [log in to unmask] <mailto:[log in to unmask]>
>>
>>
>>
>>
>>
>> Den Uge:23 02/06/2014 kl. 11.08 skrev Rajat Thomas
>> <[log in to unmask] <mailto:[log in to unmask]>>:
>>
>>> Dear SPMers,
>>>
>>> Any suggestion on how to perform multiband slice timing in SPM?
>>>
>>> Thanks.
>>>
>>> Rajat
>>>
>>>
>>>
>>> Rajat Mani Thomas
>>> Social Brain Lab
>>> Netherlands Institute for Neuroscience
>>> Amsterdam
>
--
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Dr. Michael Erb
Department of Biomedical Magnetic Resonance
University of Tübingen
Hoppe-Seyler-Str. 3
72076 Tübingen, Germany
Tel.: +49(0)7071/2987753 priv. +49(0)7071/61559
Fax.: +49(0)7071/294371
e-mail: <[log in to unmask]>
www:
http://www.medizin.uni-tuebingen.de/Forschung/Kliniken/Radiologie/Biomedizinische+Magnetresonanz.html
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