Error using dicomread, file not found

Am using dicom images in my project.

Currently trying to read in a series of dicom images into an array using dicomread but I keep getting these error.

Error using dicom_getFileDetails (line 14)
File "00100002.dcm" not found.

Error in dicomread>newDicomread (line 188)
fileDetails = dicom_getFileDetails(filename);

Error in dicomread (line 86)
[X, map, alpha, overlays] = newDicomread(msgname, frames, useVRHeuristic);

Error in Brain_Scannerv1 (line 20)
   X(:,:,1,y) = uint16(dicomread(fileNames{y}));

side notes

the files don't have the .dcm extension so I have to add the extension to the filenames.

code below works for a folder containing dicom images but not all of them.

%%create filepath and find list of Dicom
folder_path = uigetdir; 
addpath(folder_path)
dirOutput = dir(fullfile(folder_path));
fileNames = {dirOutput.name};
file_num = length(fileNames); %get the number of dicom files.
ext = '.dcm';
for p = 1:file_num
    fileNames(p) = strcat(fileNames(p),ext);
end
  fileNames(:,[1, 2]) = []; % first 2 filenames don't have have an actual file so i clear the first 2 columns
file_num = length(fileNames);

%%read DICOM files
X = repmat(int16(0), [256 256 1 file_num]); %preallocate array to store files
 for y=1:file_num
   X(:,:,1,y) = uint16(dicomread(fileNames{y}));
 end

Any help is appreciated

Answer 1

[Walter Roberson]

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

[Olukayode Sonaike]

Thanks for responding. leaving out the code

if true
ext = '.dcm';
for p = 1:file_num
  fileNames(p) = strcat(fileNames(p),ext);
end
end

gets rid of the errors.