Hi, Excuse me for a beginner's question. I am trying to convert the original dicom files to the format that can be recognized by SPM5. So I tried using spm_dicom_convert and spm_dicom_headers. However, the following error messages appeared: >> spm_dicom_headers('003_0001'); ??? Error using ==> fread Out of memory. Type HELP MEMORY for your options. Error in ==> spm_dicom_headers>decode_csa2 at 508 t(i).item(j).val = fread(fp,len,'*char')'; Error in ==> spm_dicom_headers>decode_csa at 425 t = decode_csa2(fp,lim); Error in ==> spm_dicom_headers>read_dicom at 100 dat = decode_csa(fp,tag.length); Error in ==> spm_dicom_headers>readdicomfile at 66 ret = read_dicom(fp, 'il',dict); Error in ==> spm_dicom_headers at 25 tmp = readdicomfile(P(i,:),dict); %% Here, '003_0001' is a dicom file. I am using SPM5 on Matlab R2007b with 1G RAM Thanks!