DICOM @ OFFIS

When I use dcmdump to extract Dicom-data-set from several test files ,which can be found here , http://barre.nom.fr/medical/samples/ . e.g. I use the following command to extract the dicom-data-set, dcmdump dcmfile-in a.dcm I never find the tag (0028,3000)Modality LUT sequence or (0028,3010)VOI LUT ...

check both files with dcmdump. I guess the Pixel Data element became larger? Yes , the original one has 7FE0,0000,Pixel Data Group Length=718960 the new one has 7FE0,0000,Pixel Data Group Length=777672 Also check whether the color model changed, i.e. look at tag Photometric Interpretation. original...

Dear OFFIS group, Recently I am using the dcmjpeg module to process a dicom file with compressed pixel values (Transfer syntax is JPEGProcess14SV1TransferSyntax), the download link to this file is as follows , http://barre.nom.fr/medical/samples/files/MR-MONO2-12-shoulder.gz I decompress this file a...

which function can be used to read out P-values with the help of DCMTK toolkit?
Thanks in advance!

hi, I have a dicom file ,the stored image under test is (16,12,11, PR=0) with VR=OW. I use findAndGetUint16Array() to get the raw pixel values ,and find out the max pixel value is 1287, and the min pixel value is 1008. I have the following questions , (1) when dicom viewer displays this image on a c...

Hi Joerg, I have asked you several weeks ago,about revise pixel values using DCMTK .
Today when I deal with a dicom file (16,16,15),even when I changed the pixel slightly ,the image changes a lot ? I don't know why, should I change reset the maximum value and minimum value?

when I read the raw pixel value from a dicom file (16,16,15) PR=1 ,the maximum value is 63535 , but it corresponds to a black pixel , I think it should be a white pixel ,right?

in (8,8,7) case the maximum value 255 corresponds to a white pixel.

Can anybody give me some ideas ? thanks in advance!

Anyone can give me some hints ?
Thanks in advance.

First I should thank you all for providing me great help of processing uncompressed pixel data. Now I want to process compressed pixel data , My application is that ,I want to add watermark to the image embedded in the dicom file . I need to do the following steps , (1) read out the pixel data (2) d...

Recently I have read Dicom standard concerning SOP instance uid and dicomdir , but I am still in the dark ,why it is recommended to revise creat a new SOP class uid and SOP instance uid ? I didn't find the answer ,Can u give me an answer roughly ?
Thanks a lot !

Thanks for your advices ! They help me a lot! And I am looking forward to the next release 3.5.5. And here is another question ,this time is about DICOMDIR . Yesterday I got a got a disk from one of a friends ,who hurts his leg last month, in this disk there exist a DICOM viewer and a DICOM file con...

First of all ,thanks for your reply!
Can you give me some further informations on how to generate a new SOP Instance UID for the database? which functions can I use ?
Thanks a lot !

I want to modify the pixel data ,e.g. add watermark to them ,this step I have finished ,but when I save the file,I found some of the meta information changed, e.g filemetainformationgrouplength, identifyinggrouplength,and so on, Can anyone give some idea on how to avoid revising the meta information...

Thanks a lot for the quick reply!!
wish u have a nice holiday!

I want to get the VR of Pixel data (7FE0,0010).
I use the following code:

DcmTag dcmtag(DCM_PixelData);
const char* vr_name;
vr_name=dcmtag.getVRName();

But I always get the a value of "ox", while in fact it should be OW or OB.
Can anybody give me a hint?
thanks a lot!