Hi Dave,
Thank you so much for your very helpful reply. You are indeed right about
the data; the data I've been given are a couple years old. I'm still trying
to wrap my head around all of this but I think I'm starting to get a better
sense of these Pfiles that the GE scanner produces. I so still have a few
more questions, though:
Is there any way I can reconstruct the images from my personal computer?
I've been surfing the web and it sounds like the program grecons would
reconstruct the images but I can't seem to find a download anywhere. Would a
software like this only be available commercially?
What format would the reconstructed images be in? Would they be dicom files
or could they be directly reconstructed into the Analyze or Nifti format
that fsl reads?
Perhaps I should just try tracking down the original researcher who acquired
this data...
Thanks again for all the help,
Lin
On Wed, 1 Jul 2009 10:56:17 +0100, David Lythgoe <[log in to unmask]>
wrote:
>On 30/06/2009 22:53, "Lin Nga" <[log in to unmask]> wrote:
>
>> Hi all,
>>
>> Does anyone know what file format a 3-T MRI Signa LX Horizon Echospeed
>> scanner (G.E. Medical Systems) produces? I was given data for a study and
>> each subject's folder has three subfolders: anatomy (which contains s1/sag
>> and s2/inplane folders), etc (which contains the scan information for each
>> run), and raw (which contains, what I'm assuming is the functional data).
>>
>> I've attached one of the .info files that were listed under the etc folder.
>> The functional data have a .Z extension, for example: P31232.7.Z. After
>> uncompressing the files in the anatomy folder, I was able to convert the
>> files into analyze format, using LONI's Debablet under the GE to Analyze
>> Translation setting, and open this group translation in fslview. When I try
>> to convert the functional data under the same setting (or any other
>> setting), i receive a source identification error. Does anyone know how I
>> can convert these functional files into a format fsl can handle?
>
>Hi Lin,
>
>It looks as though you have either (a) been given some old data to analyse,
>or (b) are still using a fairly old GE scanner. The old GE scanners could
>only reconstruct 512 images per series. If you needed more images, you had
>to store the raw data, which is in the file P31232.7.Z of your example.
>Looking at the info file, I would guess the images were acquired using a
>spiral acquisition. If the MRI centre your images were acquired at were
>acquiring such data, presumably they should have software to reconstruct
>images from the files you have. Typically other files from the scanner would
>be needed as well.
>
>
>Dave
>
>>
>> Thanks everyone!
>> -Lin
>>
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