[Insight-users] Re : Re : how to reduce a size of a dicom serie 3D

[Luis Ibanez]

Hi Syrine,

You should try the RegionOfInterestImageFilter,
and extract the region of the image where the vasculature of
interest is.

You will find this filter explained in the ITK Software Guide

    http://www.itk.org/ItkSoftwareGuide.pdf



     Regards,

         Luis


---------------------------------------------------------------
On Mon, Nov 16, 2009 at 2:28 PM, Syrine Sahmim <syrine.sahmim at yahoo.fr> wrote:
> hi luis,
> it's a 3D MRA tof dicom image of brain vessels.
> Regards
> Syrine
>
>
> ________________________________
> De : Luis Ibanez <luis.ibanez at kitware.com>
> À : Syrine Sahmim <syrine.sahmim at yahoo.fr>
> Cc : Xabier Artaechevarria <xabiarta at unav.es>; insight-users at itk.org
> Envoyé le : Lun 16 Novembre 2009, 0 h 39 min 14 s
> Objet : Re: [Insight-users] Re : how to reduce a size of a dicom serie 3D
>
> Hi Syrine,
>
>
> 1) What is the content of your DICOM image ?
>
>     Is it a CT scan of the brain ?
>     Is it a MRI of the abdomen ?
>     Could you post a screenshot of it to a public web site ?
>
> Please let us know,
>
> ----
>
> If you need to reduce the memory footprint of the image,
>
>     the typical options are:
>
> A) Subsample the image (as Xabier suggested)
>
> B) Crop the image (by using the RegionOfInterestImageFilter)
>     and focus on the internal rectangular block of the image
>     that contains the anatomy of interest.
>
> C) Change the pixel type of the image.
>     (e.g. if you had PET in float, you could scale it to
>       shorts).  This last one is in general a bad option,
>     given that it is very easy to lose important information
>
>
> Once you answer question (1) above , we will be able to
> give you more useful advice.
>
>
>       Regards,
>
>
>           Luis
>
>
> ---------------------------------------------------------------------------------------------
> On Sun, Nov 15, 2009 at 3:28 PM, Syrine Sahmim <syrine.sahmim at yahoo.fr>
> wrote:
>>
>> hi,
>> if we try to use this filter or any other method to reduce the size of
>> dicom
>> volume. we will lose the quality of the dicom volume because we will
>> eliminate some voxels. My problem is how to do to reduce the volume
>> without
>> modifying the quality of data. Can i choos some slices randomly from the
>> dicom seroies that i have and eliminate others to test it on matlab and
>> then
>> on itk or vtk
>> Regards
>> Syrine
>> ________________________________
>> De : Xabier Artaechevarria <xabiarta at unav.es>
>> À : Syrine Sahmim <syrine.sahmim at yahoo.fr>
>> Cc : insight-users at itk.org
>> Envoyé le : Ven 13 Novembre 2009, 11 h 38 min 42 s
>> Objet : Re: [Insight-users] how to reduce a size of a dicom serie 3D
>>
>> Hi Syrine,
>>
>> you can try this ITK filter:
>>
>> http://www.itk.org/Doxygen/html/classitk_1_1ShrinkImageFilter.html
>>
>> Regards,
>> Xabier
>>
>> 2009/11/13 Syrine Sahmim <syrine.sahmim at yahoo.fr>
>>>
>>> Hi,
>>>
>>> I'm testing a code on matlab to see the result before doing it on itk or
>>> vtk.the error i have is a warning "out of memory". So i guess that i have
>>> to
>>> reduce the size of the dicom serie 3D that i use. I tried on matlab the
>>> imresize function but there are some problem with it.
>>> If someone tells me  how to do it on itk or vtk or even matlab.
>>> Thank you
>>>
>>> Regards
>>> syrine
>>>
>
>