[Dcmlib] DICOM Programming

[Jochen Roth]

Hi again,

well actually there is no reason for beeing impressed!

Writing this short c function took me about 4 hours. I spend most of that time
typing the tag descriptions.
I think you must have misunderstood what I said. Otherwise you can't be
impressed.

Let me explain what I did.
I took a sample DICOM brain file from
http://www.wolfram.com/products/webmathematica/resources/dicom.html

I simply parse that file and print out the header information on the console.
This is the way the output looks like:
Modality                       : MR
Manufacturer                   : Philips Medical Systems
Institution Name               : PMS
Referring Physican's Name      :
Station Name                   : MMOTM9
Study Description              : brain
Series Description             : Brain      T2W/GRA/512$
Manufacturer's Model Name      : Gyroscan NT Intera
Referenced Image Sequence      : \uffff\uffff
Patient's Name                 : brain
Patient ID                     : brain

And that's all. This simple program helps me to understand the content of the
file. It is only working for implicit VR in little endian format.
I leave the pixel data untouched right now and stop parsing at this position.

But anyway as I'm talking to experts right now, maybe one of you can give me a
hint regarding the following question:

Is for each gradient direction one dataset available in DWI?
One dataset with 512x512 voxels per plane and 6 different gradient directions
would then need approximately 3MB space.
Sorry for this stupid questions, but I haven't received a sample dataset with
DWI data yet. Otherwise I would already have a look at myself.
Can you give me a hint on how to convert DWI data to tensordata? Or do 
I have to
convert it to NRRD- format first?

Thanks for your help.
I'll have a look at the GDCM toolkit over weekend.

cheers

Jochen




Quoting Mathieu Malaterre <mathieu.malaterre at gmail.com>:

> Wow ! I am actually very impressed you managed to write a c lib to
> read DICOM file. How long did it took you ?
> Anyway I was asking this question simply because I work with a group
> that is also dealing with DWI and they are using GDCM.
>
> http://www.na-mic.org/Wiki/images/7/77/SlicerTraining9_DTI-FromDicomToNrrd.ppt
> http://wiki.na-mic.org/Wiki/index.php/NAMIC_Wiki:DTI:DICOM_for_DWI_and_DTI
>
> If would like to get started with GDCM, feel free to ask any question
> at: dcmlib at creatis.insa-lyon.fr
>
> Regards,
> Mathieu
>
> On 10/27/06, Jochen Roth <roth at new-light.de> wrote:
>> Hi Mathieu,
>>
>> I haven't used any DICOM toolkit yet.
>> I wrote a C program by my own, which reads in an implicit little 
>> endian DICOM
>> file and prints the public information e.g. patients name, number of rows,
>> physicans name and so on.
>> As I already mentioned I'm a newbie in this topic.
>>
>> Currently I have a look at the DCMTK toolkit to investigate if it is able to
>> transform DWI data to DTI data. I read D.Clunies quote that the
>> encoding of the
>> entire tensor data is not yet standardized. So as I need the diffusion
>> tensor I
>> asked myself if there would already exist code that does exactly 
>> that what I'm
>> searching for.
>>
>> Jochen
>>
>> Quoting Mathieu Malaterre <mathieu.malaterre at gmail.com>:
>>
>> > Hi Jochen,
>> >
>> >  Which DICOM toolkit are you using to do that ?
>> >
>> > Thanks
>> > Mathieu
>> >
>> > Jochen wrote:
>> >> Hi Lint,
>> >>
>> >> as I'm a real DICOM newby I'm very interested in your services.
>> >> Congratulation to your website. It looks pretty good.
>> >> Unfortunately you haven't provided much information yet. Or do I have
>> >> to be a member to see the content?
>> >>
>> >> I'm searching for an programming example which generates tensor data
>> >> out of DWI data.
>> >> All I already did was writing a short c-program which simply prints the
>> >> header of an implicit VR DICOM file.
>> >>
>> >> So I do not have much knowledge regarding DICOM yet. But I'm trying to
>> >> improve it.
>> >>
>> >> Jochen
>> >> Lint Radley wrote:
>> >> > Thanks Tom!
>> >> >
>> >> > I am planning on adding links, etc, that I know of. Any one who has
>> >> > suggestions, please feel free to post them.
>> >> >
>> >> > TDwyer wrote:
>> >> > > This is great!  I hope it lives up to its potential.  I'll 
>> put up a few
>> >> > > vb.net routines when I get a chance.
>> >> > > Tom
>> >> > >
>> >> > > Lint Radley wrote:
>> >> > >> Hello,
>> >> > >>
>> >> > >> As discussed in a previous thread, I went ahead and made a little
>> >> > >> forum/portal for programming DICOM applications, in my spare time.
>> >> > >>
>> >> > >> The URL is http://www.dicomprogramming.com/
>> >> > >>
>> >> > >> As you can see it's still drastically in its infancy. Please help
>> >> > >> contribute!
>> >> > >>
>> >> > >> Hope this will help all of us - or at least someone :-)
>> >> > >>
>> >> > >> -Lint
>> >> > >
>> >
>> >
>>
>>
>>
>>
>
>
> -- 
> Mathieu
>