Re[1] [Insight-users] Re[1]OperatingRoom and itkFstream.h (HOW TO GETDATA)

[lydia ycl]

Dear Luis,
I followed all the instructions but I foud a problem in 
decompression with GUNZIP and even with Winzip 
for /compression option) for Windows platform
Do you get after decompression 2 files? what are the 
extensions?
Sorry for bothering you again.
Regards
Lydia

> -------Message d'origine-------
> De : Luis Ibanez <ibanez at choroid.cs.unc.edu>
> Date : 04/01/2002 19:53:32
> 
> 
> Hi Lydia,
> 
> 
> On Fri, 4 Jan 2002, lydia ycl wrote:
> > it's a pity for the operating room project.
> 
> ???
> Did you have further problems after updating your ITK 
checkout ?
> 
> 
> 
> 
> > For the Gaussian filter project, I couldn't find which
> > image format should I use. I tried many of them but each
> > time it failed in reading the file. May I ask you to 
give
> > me the right format (even pgm didn't work)
> 
> 
> The format that GaussianFilter is accepting 
is "MetaImage".
> Here is how you can create one image in the appropiate 
format.
> 
> Metaimages are composed of a Header file and a Raw data 
file.
> You can get raw data from the BrainWeb project and write 
the
> corresponding MetaImage header for it.
> 
> Do the following:
> 
> 1) In order to get RAW data, go to :
> 
> 
http://www.bic.mni.mcgill.ca/brainweb/selection_normal.html
> 
> - Select the Image modality you prefer : T1, T2, PD
> - Select "Slice Thickness" = 1mm
> - Select "Noise" = 3
> - Select "non-uniformity" = 20
> 
> then click in Download.
> That will prompt you to another web page where you have
> a header file (which is different from the MetaImage 
header),
> and a new set of selections:
> 
> - Select "File format" = raw byte (this is very 
important)
> - Select "Compression" = gunzip (you'll get a .gz file)
> 
> and fill out your name, institution and e-mail 
> this will help them to get funding for continuing 
> with their project. :-) 
> 
> Then, click on "Start download"
> 
> you will be prompted to provide a file name for the data.
> 
> Then, sit back, relax and take your coffee while the
> about 5Mb got copied into your machine.
> 
> When you are done with the download, decompress the 
> file with "gunzip". You should get a text header and
> a raw data file.
> 
> 
> 2) In order to create the MetaImage header, cut paste
> the following lines in a "new" file with extension
> ".mhd".
> 
> 
> NDims = 3
> DimSize = 181 217 180
> ElementType = MET_UCHAR
> ElementSpacing = 1.0 1.0 1.0
> ElementByteOrderMSB = False
> ElementDataFile = brainweb165a10f17.raw 
> 
> 
> 
> Now, 
> replace the values in front of DimSize for the image size
> that is indicated in the text header file that you
> got from BrainWeb. You should use the values indicated
> under the "length" column as : ( xspace, yspace, zspace).
> 
> Keep the MET_UCHAR because you selected "raw byte 
> (unsigned)" at BrainWeb. 
> 
> Change the "ElementDataFile" = "brainweb...." for
> the name of the raw data file that you just downloaded
> from the BrainWeb project.
> 
> 
> 
> 3) That's it !
> 
> 
> 
> Now you should be able to load this file from the 
> GaussianFilter program. Select "File->Open" from
> the bar menu, and look for the ".mhd" header file.
> 
> Make sure that the raw data file and the header file
> are in the same directory.
> 
> 
> Take into account that the load will take a couple
> of seconds because the file is about 5Mb. 
> 
> You might want also to check the amount of RAM memory 
> in your machine to make sure that it can handle all 
> the intermediary images.
> 
> 
> 
> 
> 
> Please let us know if you encounter any dificulties
> creating this data file.
> 
> 
> 
> Thanks
> 
> 
> Luis
> 
> 
> 
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> 
>
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