folder_path = uigetdir;
dirOutput = dir(folder_path);
dirOutput([dirOutput.isdir]) = [];
fileNames = fullfile(folder_path, {dirOutput.name});
If a file does not have a .dcm extension, then dicomread() will not be able to read the file if you add the .dcm extension. You should leave out the code
ext = '.dcm';
for p = 1:file_num
fileNames(p) = strcat(fileNames(p),ext);
end
Note: you have
fileNames(:,[1, 2]) = []; % first 2 filenames don't have have an actual file so i clear the first 2 columns
which is not correct code because some files can sort before '.' and '..' . In the code above, the equivalent but more robust code is the one involving isdir
