How to convert Dicom images (.dcm) into '.img' format ?

Hi, I have a c ++ program linked through MEX file to a Matlab program. The input to this is only '.img' format. Now I have a few images which are .dcm which cannot be given as input to the program.

Is there any way to convert .dcm to .img format?

Answer 1

[Walter Roberson]

You can use dicomread() to read the files.

If you look in the File Exchange you will find several programs that can write ENVI img/hdr files

[Gopichandh Danala]

can you please attach a link of FEX where I can get related functions.

And what do you mean by ENVI img/hdr (img files have header information? or is it a different format then '.img'?)

Please let me know

[Walter Roberson]

.hdr files give you information about how to interpret the .img files

https://www.harrisgeospatial.com/docs/enviheaderfiles.html

https://www.harrisgeospatial.com/docs/ENVIImageFiles.html

There is some potential ambiguity here. The same file extension pair .img/.hdr is used for ENVI and for NIFTI / Analyze files. You might wish to have a look at https://www.mathworks.com/matlabcentral/fileexchange/8797-tools-for-nifti-and-analyze-image if your are looking for NIFTI / Analyze

[Gopichandh Danala]

Thanks Walter, I will try these

[Gopichandh Danala]

Walter, Can you help me with using this files. I found a function by name: save_nii inside the zip file at https://www.mathworks.com/matlabcentral/fileexchange/8797-tools-for-nifti-and-analyze-image.

The function says: Support both .nii and *.hdr/.img file extension

Usage: save_nii(nii, filename, [old_RGB])

I tried to enter

save_nii(img,'savedImage.img',0)

where img is image read using dicomread, and the last argument is [RGB], as the image is grayscale I entered '0'. But it gives the error:

Error using save_nii (line 56)
Usage: save_nii(nii, filename, [old_RGB])

can you please try this

[Walter Roberson]

Look at the documentation:

%  Usage: save_nii(nii, filename, [old_RGB])
%  
%  nii.hdr - struct with NIFTI header fields (from load_nii.m or make_nii.m)
%
%  nii.img - 3D (or 4D) matrix of NIFTI data.

You passed in a plain data array instead of an appropriate struct.