Dear Marko and John:
Thanks for your response. It didn't finish after 48hrs so I decided to
try later.
> One would certainly hope so since the original message was posted 2
> days ago :) But just as a hunch: have you coregistered the images to
> each other before warping them?
Good idea. I only set AC-PC lines in both images. I'll give another
try after rigid body coregistration.
Thanks,
Hedok
> This may be a good idea as a rigid-body will take care of gross
> positional differences and will leave only the small local differences
> for the warping to model. If I remember correctly, this was
> recommended for earlier versions of the toolbox so perhaps this helps.
>
> Best,
> Marko
>
>> -----Original Message-----
>> From: SPM (Statistical Parametric Mapping) [mailto:[log in to unmask]]
>> On Behalf Of Hedok Lee
>> Sent: Saturday, August 25, 2007 12:38 AM
>> To: [log in to unmask]
>> Subject: [SPM] Time it takes to finish high-dimensional warping
>>
>> Dear SPMers:
>>
>> This is regarding high-dimensional warping in SPM5(the latest patch
>> Updates 826). I'm trying to register serially corrected T1W scans
>> using high-
>> dimensional warping. It's taken from the same subject using high
>> resolution T1W(SPGR 1.0x1.0x1.5mm 256x256x100). I'm interested in
>> the anatomical areas where structures have expanded or shrunk between
>> the
>> two time points, so I thought it would be useful to try the toolbox.
>> This is the first time trying this toolbox, and my apology for such a
>> elementary question, and please correct me if this is not something I
>> should be doing. I picked high-dimensional warping in the GUI menu, and
>>
>> selected image from time point A as a reference. In the "moved image",
>> I selected an image taken in time point B. Everything else was set
>> to default values.
>>
>> The problem is that it hasn't finished the registration after ~24hrs and
>>
>> I'm wondering if this is a normal behavior. I'm using a PC(AMD64 1.8GHz
>> 2G RAM Centos 4_64) with Matlab 7.1.0.183
>>
>> According to the "top" command, matlab is using 14% of RAM and none of
>> the swap space is being utilized so I don't think it's RAM problem.
>> The CPU
>>
>> has been 100% the whole time. I appreciate if someone can tell me if
>> it's going to take days, weeks, or years to register two scans. Also
>> I'm attaching the screenshot of what I've been seeing for past 24hrs.
>>
>> Thanks,
>>
>> Hedok
>>
>
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