Quick Access to Pixel values in DICOM images

0
votes

I am trying to compare datasets of DICOM images so that I can choose a dataset best suited for volumetric rendering in opengl. I need DICOM images with r,g,b and alpha channels.

So, basically, I want a application like irfanView in ubuntu in which i just need to click a point and i get the corresponding pixel information.

I dont want some c++ library like itk or dcmtk. i dont know how to do the same thing with imagemagick. Does anyone know of such an application?

Some progress: I use dcmtk(although i would prefer something with a gui) and use this command:

$ dcmdump .dcm A huge output comes which looks like:

Dicom-File-Format

Dicom-Meta-Information-Header

Used TransferSyntax: Little Endian Explicit (0002,0002) UI =MRImageStorage # 26, 1 MediaStorageSOPClassUID (0002,0010) UI =LittleEndianImplicit # 18, 1 TransferSyntaxUID

Dicom-Data-Set Used TransferSyntax: Little Endian Implicit (0008,0005) CS [ISO_IR 100] # 10, 1 SpecificCharacterSet (0008,0008) CS [ORIGINAL\SECONDARY\MPR] # 24, 3 ImageType (0008,0016) UI =MRImageStorage # 26, 1 SOPClassUID (0008,0018) UI [1.3.12.2.1107.5.2.4.7259.20010531113752000010358] # 48, 1 SOPInstanceUID (0008,0020) DA [20010302] # 8, 1 StudyDate

and so on.... till...

(7fe0,0010) OW 0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000\0000... # 131072, 1 PixelData

which is the last line in that output. That is the information I am looking for. but how do i extract the complete pixel data and not just a tiny sample of it?

1
opengldicom
Are you looking for a ready-made application supporting this feature, or do you want a library that you can plug in to your own "dataset selection" application? – Anders Gustafsson
A ready-made application so that I can quickly see what the rgba values are at different pixels... just like in irfanview if possible – Spectre

1 Answers

2
votes

I am not aware of any free DICOM image editor with this kind of functionality, so I recommend that you do this in a two-step approach:

  • Use a tool to dump your DICOM image to a regular image format, for example dcm2pnm that is available as a precompiled binary in the DCMTK binary distribution (at least the Windows distro).
  • Use whatever tool for image viewing and editing you prefer (IrfanView for example) to examine the dumped image.