Can't open files

Question

Nora A 2019-7-9

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/470852-can-t-open-files

回答： Image Analyst 2023-2-4

在 MATLAB Online 中打开

Hi,

I'm not really familiar with MATLAB, but I need it to extract some information for my project.

I'm using a code (CGITA) that aimes to open and analys medical images (DICOM).

But I'm not able to open these images as I got the following error:

Unable to perform assignment because dot indexing is not supported for variables of this type.
Error in parse_directory_for_dicom (line 97)
            fileinfo.PatientName.GivenName = 'N/A';
Error in CGITA_GUI>load_Primary_btn_Callback (line 450)
    [filelist fusion_filelist] = parse_directory_for_dicom(Primary_dir);
Error in gui_mainfcn (line 95)
        feval(varargin{:});
Error in CGITA_GUI (line 42)
    gui_mainfcn(gui_State, varargin{:});
Error in
matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)CGITA_GUI('load_Primary_btn_Callback',hObject,eventdata,guidata(hObject))
 
Error while evaluating UIControl Callback.

Appreciate your help.

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Nora A 2019-7-9

在 MATLAB Online 中打开

I'm using R2018a

function varargout = parse_directory_for_dicom(dirname);
all_files_list = list_all_files(dirname, {}, '');
%cd(handles.dicom_folder);
% % Alternative option
% dirname = get(handles.original_dir,'String');
% if ~isdir(dirname)
%     errordlg('This is not a valid folder');
%     return;
% end
%a = dir(dirname);
study_ID = [];  % create empty cell array
study_description_name = {};
% description_location = {};
%b = ls(dirname);
%dirlen = length(b)-2; % must subtract "." & ".." 2 elements
dirlen = length(all_files_list);
filelist = {};
if dirlen ==0
    return;
end
do_fields_table= [8 4158; 8 49; 8 32; 8 4144; 32 16; 8 8487; 16 16; 8 16; 32 13];
dicomdict('set', 'dicom-dict_truncated.txt');
%tic
timing_n = floor(dirlen/20);
h = waitbar(0,'Parsing the directory for DICOM files. Please wait...');
steps = dirlen;
for i = 1:dirlen
    %dicomread = fullfile(handles.dicom_folder, a(i+2).name);
    %info = dicominfo(all_files_list{i});
    if mod(i, timing_n) == 0
        waitbar(i / steps);
    end
    if exist('dcmreadfile')
        info = [];
        try
            info = dcmreadfile(all_files_list{i});
        catch EM
        end
    else
        info = dicominfo_Dean_rev(all_files_list{i}, do_fields_table);
    end
    
    %if ~isempty(info) && isfield(info, 'StudyID')
    if ~isempty(info) && isfield(info, 'StudyInstanceUID') 
        %warndlg('No dicom files found');
    %else
        %find_location = strcmp(study_ID, info.StudyID);  % "find(study_ID == info.StudyID)" is unavailable because info.StudyID is a string
        find_location = strcmp(study_ID, info.StudyInstanceUID);  % "find(study_ID == info.StudyID)" is unavailable because info.StudyID is a string
        if sum(find_location) == 0
            % new ID for the ID List
            %study_ID{end+1} = info.StudyID;
            study_ID{end+1} = info.StudyInstanceUID;
            find_location = length(study_ID);
            study_description_name{find_location}.description{1} = info.SeriesDescription;
            study_description{find_location}.description{1}.filename{1} = all_files_list{i};
        else
            % ID already exists in list
            if isfield(study_description{find_location}, 'description')
                description_location = find(strcmp(study_description_name{find_location}.description, info.SeriesDescription));
                if isempty(description_location)
                    study_description_name{find_location}.description{end+1} = info.SeriesDescription;
                    study_description{find_location}.description{end+1}.filename{1} = all_files_list{i};
                else
                    study_description{find_location}.description{description_location}.filename{end+1} = all_files_list{i};
%                     study_description_name{find_location}.description{description_location} = info.SeriesDescription;
                end
            else
                study_description_name{find_location}.description{1} = info.SeriesDescription;
                study_description{find_location}.description{1}.filename{1} = all_files_list{i};
            end
        end
    end
    
end
close(h)
dicomdict('factory');
table_content = {};
datatable = {};
for i = 1:length(study_ID)
    for j = 1:length(study_description_name{i}.description)
        if exist('dcmreadfile')
            fileinfo = dcmreadfile(study_description{i}.description{j}.filename{1});
        else
            fileinfo = dicominfo(study_description{i}.description{j}.filename{1});
        end
        if ~isfield(fileinfo.PatientName, 'GivenName')
            fileinfo.PatientName.GivenName = 'N/A';
        end
        if ~isfield(fileinfo.PatientName, 'FamilyName')
            fileinfo.PatientName.FamilyName = 'N/A';
        end
        
        if ~isfield(fileinfo, 'SeriesTime')
            datatable(end+1,:) = {study_description{i}.description{j}.filename, []};
            fileinfo.SeriesTime = 'N/A';
        else
            datatable(end+1,:) = {study_description{i}.description{j}.filename, fileinfo.SeriesTime};
        end
        
        table_content(end+1,:) = {false, false, fileinfo.PatientID, fileinfo.PatientName.FamilyName, fileinfo.PatientName.GivenName, study_ID{i}, study_description_name{i}.description{j}, fileinfo.StudyDate, fileinfo.SeriesTime, ...
            length(study_description{i}.description{j}.filename), false};
        
    end
end
if size(datatable,1) == 1
    % simple case. Return the list.
    filelist = study_description{1}.description{1}.filename;
else
    [filelist fusion_filelist] = DICOM_selection_GUI(datatable, table_content, fileinfo, study_ID, study_description);
end
varargout{1} = filelist;
if exist('fusion_filelist')
    varargout{2} = fusion_filelist;
else
    varargout{2} = '';
end
return;

Rik 2019-7-9

在 MATLAB Online 中打开

This code seems very much a work in progress. There is a lot of commented code, and not all comments accurately describe what the code is doing.

The Image Processing Toolbox function dicominfo apparently has a different output from that custom function dcmreadfile. The code below should reproduce your error.

clc
clear fileinfo
fileinfo.PatientName='foo';
if ~isfield(fileinfo.PatientName, 'GivenName')
    fileinfo.PatientName.GivenName = 'N/A';
else
    disp('condition returned false')
end

This example shows the probable root cause: fileinfo.PatientName is already a char array, instead of a struct, as that assignment assumes.

mahmoud hafez 2023-2-4

This code old work and agree with old Matlab version, so, you can use an older version of MATLAB to avoid this error.

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Answer 1

Image Analyst 2023-2-4

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/470852-can-t-open-files#answer_1163700

在 MATLAB Online 中打开

Try changing the first few lines of the function to this

function varargout = parse_directory_for_dicom(dirname)
dirListing = dir(fullfile(dirname, '*.dcm'));
all_files_list = fullfile(dirname, {dirListing.name})