[Insight-users] information loss of images
ja sk
jasjaskas at yahoo.com.sg
Wed, 24 Mar 2004 13:53:25 +0800 (CST)
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Hi Luis,
A) I'm not sure what you mean by modality, but its MRI cine from siemens
B) I created the Meta Header manually and using the MetaImageImporter
C)I did not use any ImageFileReader/Writer for creating the .mhd file, so no raw files for the volumes were created.
Well i tried DicomSeriesReadImageWrite but the images are in "time series", so DicomSeriesReadImageWrite will just create a .mhd and .raw for a particular slice for a time instance.
I also tried out Jolinda's MRIConvert, and it has no means of writing out a volume in this case. Any suggestions, Thank You!!
here's the mhd file:
*********************
NDims = 3
DimSize = 256 256 12
ElementSpacing = 1.25 1.25 10
Position = 0 0 0
ElementByteOrderMSB = True
ElementType = MET_USHORT
ElementDataFile = LIST 2
mri_189.dcm
mri_210.dcm
mri_231.dcm
mri_252.dcm
mri_273.dcm
mri_294.dcm
mri_315.dcm
mri_336.dcm
mri_376.dcm
mri_397.dcm
mri_418.dcm
mri_439.dcm
**************************
Regards
Kasp
Luis Ibanez <luis.ibanez at kitware.com> wrote:
Hi Kasp,
The answer to your question probably
can be found among the answers of the
following new questions:
A) What image modality is stored in your DICOM files ?
B) Did you created the MetaHeader manually ?
or through the ImageFileWriter ?
C) What pixel type did you used for instantiating the
ImageFileReader ?
D) What pixel type did you used for instantiating the
ImageFileWriter ?
E) Can you post the MetaImage header that you got ?
Probably a post of your code will be a better
answer to these questions.
FYI, The simplest way of converting DICOM to MetaImage
(or to any other ITK supported file format) is to use
the application:
Insight/Examples/IO/
DicomSeriesReadImageWrite.cxx
You could also use MRIConvert
http://lcni.uoregon.edu/~jolinda/MRIConvert
Regards,
Luis
--------------
ja sk wrote:
> Hi,
>
> I created a meta header file for a volume of dicom slices, but when i
> tried to view the volume with the image viewer found in the Insight
> applications, it seems like the quality has disintegrated alot (not
> clear at all), as compared to reading the single dicom file. Is there
> any way to prevent this, thanks.
>
> Regards from Kasp
>
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--0-865966912-1080107605=:45433
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<DIV>Hi Luis,</DIV>
<DIV> </DIV>
<DIV>A) I'm not sure what you mean by modality, but its MRI cine from siemens</DIV>
<DIV> </DIV>
<DIV>B) I created the Meta Header manually and using the MetaImageImporter<BR></DIV>
<DIV>C)I did not use any ImageFileReader/Writer for creating the .mhd file, so no raw files for the volumes were created.</DIV>
<DIV> </DIV>
<DIV>Well i tried DicomSeriesReadImageWrite but the images are in "time series", so DicomSeriesReadImageWrite will just create a .mhd and .raw for a particular slice for a time instance. </DIV>
<DIV>I also tried out Jolinda's MRIConvert, and it has no means of writing out a volume in this case. Any suggestions, Thank You!!</DIV>
<DIV> </DIV>
<DIV>here's the mhd file:</DIV>
<DIV>*********************</DIV>
<DIV>NDims = 3<BR>DimSize = 256 256 12<BR>ElementSpacing = 1.25 1.25 10<BR>Position = 0 0 0<BR>ElementByteOrderMSB = True<BR>ElementType = MET_USHORT<BR>ElementDataFile = LIST 2<BR>mri_189.dcm<BR>mri_210.dcm<BR>mri_231.dcm<BR>mri_252.dcm<BR>mri_273.dcm<BR>mri_294.dcm<BR>mri_315.dcm<BR>mri_336.dcm<BR>mri_376.dcm<BR>mri_397.dcm<BR>mri_418.dcm<BR>mri_439.dcm</DIV>
<DIV>**************************</DIV>
<DIV> </DIV>
<DIV>Regards</DIV>
<DIV>Kasp</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV><B><I>Luis Ibanez <luis.ibanez at kitware.com></I></B> wrote:</DIV>
<BLOCKQUOTE class=replbq style="BORDER-LEFT: #1010ff 2px solid; MARGIN-LEFT: 5px; PADDING-LEFT: 5px"><BR><BR>Hi Kasp,<BR><BR><BR>The answer to your question probably<BR>can be found among the answers of the<BR>following new questions:<BR><BR><BR>A) What image modality is stored in your DICOM files ?<BR><BR>B) Did you created the MetaHeader manually ?<BR>or through the ImageFileWriter ?<BR><BR>C) What pixel type did you used for instantiating the<BR>ImageFileReader ?<BR><BR>D) What pixel type did you used for instantiating the<BR>ImageFileWriter ?<BR><BR>E) Can you post the MetaImage header that you got ?<BR><BR><BR>Probably a post of your code will be a better<BR>answer to these questions.<BR><BR>FYI, The simplest way of converting DICOM to MetaImage<BR>(or to any other ITK supported file format) is to use<BR>the application:<BR><BR>Insight/Examples/IO/<BR>DicomSeriesReadImageWrite.cxx<BR><BR><BR>You could also use
MRIConvert<BR>http://lcni.uoregon.edu/~jolinda/MRIConvert<BR><BR><BR><BR>Regards,<BR><BR><BR><BR><BR>Luis<BR><BR><BR><BR>--------------<BR>ja sk wrote:<BR><BR>> Hi,<BR>> <BR>> I created a meta header file for a volume of dicom slices, but when i <BR>> tried to view the volume with the image viewer found in the Insight <BR>> applications, it seems like the quality has disintegrated alot (not <BR>> clear at all), as compared to reading the single dicom file. Is there <BR>> any way to prevent this, thanks.<BR>> <BR>> Regards from Kasp<BR>> <BR><BR><BR></BLOCKQUOTE><p><img src=http://sg.yimg.com/i/sg/icons/16/messenger.gif width="16" height="16"><b> <a href="http://sg.rd.yahoo.com/mail/tagline/?http://sg.messenger.yahoo.com/" target=_blank>Yahoo! Messenger</a></b><br><small>- <a href="http://sg.mobile.yahoo.com/sms/msgr20.html">Log on</a> with your mobile phone!</small>
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