Correction

This is the lats code :

 optseq2 --ntp 140 --tr 3 --psdwin 6 15 3 --ev ev20 3 20 --ev ev40 3 20 --ev ev60 3 20 --nkeep 3 --o OptSeq_TRIALS/trial_squ --nsearch 10000

So The duration is 3 seconds for each and each repeat it 20 times. What I need is to change/add the ISI to be 7 + or - 1.5 seconds.

Any help please ?

Another point is about the psdwin, I am not sure what exactly it represents. I saw your slides but I thought this should also change the ISI,. Can you comment on it please ?

Thanks

AS



On Mon, Jun 10, 2013 at 5:49 PM, fMRI <fmri2013@gmail.com> wrote:
Dear Prof Douglas,

Thanks for your response.

I managed to do the following:

optseq2  --ntp 140 --tr 3 --padwin 0 12 3 --ev ev15 --ev ev30 --ev ev45 --nkeep 3 --o trial --nsearch 10000

Now what I really want to do is to make the ISI 7 seconds + or - 1.5 seconds. I am not sure how I should use the percentage option if this is what I should change plus the ISI time?

I hope this clarifies it more

Regards,

AS

On 10 Jun 2013, at 16:21, Douglas N Greve <greve@nmr.mgh.harvard.edu> wrote:

> Hi, can you at least come up with an optseq2 command line that I could
> then help you with? There are lots of examples on the web page. You
> should be able to get to a point where you have an error.
> thanks
> doug
>
>
> On 06/10/2013 05:14 AM, fMRI wrote:
>> Hello all,
>>
>> This is my first question in this list and it is about OptSeq2.
>>
>> I am nee to this command.
>>
>> In brief, I wish to insert the following but Some of them I could not handle it:
>>
>> My experiment has three conditions although I will later specify them as one condition:
>>
>> Moving hand at three different target level ( say 10 20 30). Then I will model them as a one condition and enter the parametric response as a first order polynomial effects.
>>
>> My design will have two columns : main effect of moving hand and the 1 order.
>>
>> My contrast will be like this [1 0; 0 1]
>>
>> This is what I would like to optimize using OptSeq2:
>>
>> Event design
>> 1) ISI 6 seconds + or - 1.5 seconds ( I could not do this
>> 2) TR 3
>> 3) volumes 150
>> 4) 45 hand movement; 15 at each target level   ( I could not do this )
>> 5) each movement lasts for 3 seconds
>>
>> I am not sure whether I should use null events or the Period between movement is enough.
>>
>> Also my main aim is to optimize the best design in terms of detection.
>>
>> Please any guide or help
>>
>> Thanks
>>
>>
>> AS
>>
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>
> --
> Douglas N. Greve, Ph.D.
> MGH-NMR Center
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