De-resolution of Dicom Image

Beginner to Matlab with radiology background

I am going to decrease the resolution for butch of DICOM image (40,000 MRI images ) from around 500(or 600) squre to 128 square and save them into the new folder and subfolder in same arrangement.

I have tried butch image processing addon, but it seems pretty dumb for saving output.

I know that imresize() can change the resolution, but I want save output dicom images in the folder and subfolders with the same name and arrangement.

I have seen the answer in https://www.mathworks.com/matlabcentral/answers/445249-dicom-image-resize-error#answer_361372

could anyone help me generate some code

Read folder and subfolder with dicom file -> use imresize to chage the resolution to 128x128 -> save output dicom image in the same name and save them in the new created folder and subfolder with the same name

Answer 1

[Bjorn Gustavsson]

So you problem is that you cannot figure out how to save a file to a new same-name file in another directory?

If so something like this should be the pattern:

Dicomfiles = dir('*.dcm');
New_dir = 'Dir4newsmallimages';
mkdir(New_dir);
for iFile = 1:numel()
  X = dicomread(Dicomfiles(iFile).name);
  INFO = dicominfo(Dicomfiles(iFile).name);
  % and whatever you need from the file
  Xout = improcessing(X); % or whatever you need to do with the image
  INFO = metadatafixing(INFO); % You might have to modify the meta-data to match Xout
  outname = fullfile(New_dir,Dicomfiles(iFile).name)
  dicomwrite(Xout, outname, INFO);
end

HTH