display a screen/frame to display dicom image in matlab - matlab

Question

I have a matlab program to upload a folder of dicom images. I want to display a black screen/frame where in the image would be loaded. Now, the image is displayed over the browse button.
Is there a way to do it ?
Here's my code:
function varargout = ui(varargin)
% UI MATLAB code for ui.fig
% UI, by itself, creates a new UI or raises the existing
% singleton*.
%
% H = UI returns the handle to a new UI or the handle to
% the existing singleton*.
%
% UI('CALLBACK',hObject,eventData,handles,...) calls the local
% function named CALLBACK in UI.M with the given input arguments.
%
% UI('Property','Value',...) creates a new UI or raises the
% existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before ui_OpeningFcn gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to ui_OpeningFcn via varargin.
%
% *See GUI Options on GUIDE's Tools menu. Choose "GUI allows only one
% instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES
% Edit the above text to modify the response to help ui
% Last Modified by GUIDE v2.5 17-Nov-2015 13:11:51
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', #ui_OpeningFcn, ...
'gui_OutputFcn', #ui_OutputFcn, ...
'gui_LayoutFcn', [] , ...
'gui_Callback', []);
if nargin && ischar(varargin{1})
gui_State.gui_Callback = str2func(varargin{1});
end
if nargout
[varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT
end
% --- Executes just before ui is made visible.
function ui_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject handle to figure
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% varargin command line arguments to ui (see VARARGIN)
% Choose default command line output for ui
handles.output = hObject;
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes ui wait for user response (see UIRESUME)
% uiwait(handles.figure1);
end
% --- Outputs from this function are returned to the command line.
function varargout = ui_OutputFcn(hObject, eventdata, handles)
% varargout cell array for returning output args (see VARARGOUT);
% hObject handle to figure
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Get default command line output from handles structure
varargout{1} = handles.output;
end
% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
global files;
global dname;
dname = uigetdir('Select the dicom image folder');
set(handles.text2, 'String', dname);
files = dir(fullfile(dname, '*.dcm'));
dname = [dname '\'];
global indexSelected;
indexSelected = 1;
filePath = [dname files(1).name];
fileRead = dicomread(filePath);
imshow(fileRead, []);
end
function text2_Callback(hObject, eventdata, handles)
% hObject handle to text2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hints: get(hObject,'String') returns contents of text2 as text
% str2double(get(hObject,'String')) returns contents of text2 as a double
% --- Executes during object creation, after setting all properties.
end
function text2_CreateFcn(hObject, eventdata, handles)
% hObject handle to text2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
% Hint: edit controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end
end
% --- Executes on button press in pushbutton2.
function pushbutton2_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
global indexSelected;
global files;
global dname;
if(indexSelected == 1)
indexSelected = length(files);
filePath = [dname files(indexSelected).name];
fileRead = dicomread(filePath);
imshow(fileRead, []);
else
indexSelected = indexSelected - 1;
filePath = [dname files(indexSelected).name];
fileRead = dicomread(filePath);
imshow(fileRead, []);
end
end
% --- Executes on button press in pushbutton3.
function pushbutton3_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton3 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
global indexSelected;
global files;
global dname;
if(indexSelected == length(files))
indexSelected = 1 ;
filePath = [dname files(1).name];
fileRead = dicomread(filePath);
imshow(fileRead,[]);
else
indexSelected = indexSelected + 1;
filePath = [dname files(indexSelected).name];
fileRead = dicomread(filePath);
imshow(fileRead,[]);
end
end

Answer 1

In short:
You can fix your problem by adding an axes in your GUI in the position (and with the size) in which you want to display the image
You should add in your callback some checks in order to catch the following situations:
the users selects Cancel when selecting the folder
the selected folder does not contains any .dcm files
pushbutton2 and pushbutton3 should be disabled when the GUI is opened and then enabled in the pushbutton1 callback if the users selected a right folder. You can disable them either using GUIDE or setting their enable property off in the GUI CreateFcn
Also you can avoid using global varaibles; you can actually store and share variables among the callback by using the guidata built-in function.
Adding the axes
After having added the axes (with, for example, tag axes1) you can set its appearence in the CreateFcn:
you can set a black background color using set function
you can remove X-axis and Y-axis ticks using set function as well
You can insert this callback in your code
% --- Executes during object creation, after setting all properties.
function axes1_CreateFcn(hObject, eventdata, handles)
% hObject handle to axes1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
% Hint: place code in OpeningFcn to populate axes1
% Set axes background color to black
set(hObject,'color','k')
% Remove X-axis and Y-axis ticks
set(gca,'xtick',[],'ytick',[])
% Disable pushbutton2 and pusbutton 3 (they will be enabled in pushbutton1
% callback)
set(handles.pushbutton2,'enable','off')
set(handles.pushbutton3,'enable','off')
When the imshow function is called in your pushbutto callback the DICOM image will be displayed in the right position.
Adding checks on folder selection
You can simply test the value returned by uigetdir: it is set to 0 when the user pushes Cancel or
Using GUI data instead of flobal variables
You can store the varaibles you want to share among the callback adding them to the GUI data struct.
In the GUI OpeningFcn you can initialize (if needed) the varaibles you want to share by adding the following code:
% Add "indexSelected" to handles struct and initialize it
my_gui_data=guidata(gcf)
my_gui_data.indexSelected=0;
guidata(gcf,my_gui_data);
The function guidata is used at the beginning to get the GUI data from the GUI (at the beginning it only contains the GUI handles).
Then you can add the indexSelected to the GUI data struct and set the updated GUI data struct by calling again guidata.
When you need to retrieve and / or update the variables in the callback you just have to use the same approach. For example, to store the dname varaible in the pushbutton1_Callback
my_gui_data=guidata(gcf)
my_gui_data.dname=dname;
guidata(gcf,my_gui_data);
I've created a GUI (dcom_gui) to test the above suggestions:
function varargout = ui(varargin)
% UI MATLAB code for ui.fig
% UI, by itself, creates a new UI or raises the existing
% singleton*.
%
% H = UI returns the handle to a new UI or the handle to
% the existing singleton*.
%
% UI('CALLBACK',hObject,eventData,handles,...) calls the local
% function named CALLBACK in UI.M with the given input arguments.
%
% UI('Property','Value',...) creates a new UI or raises the
% existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before ui_OpeningFcn gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to ui_OpeningFcn via varargin.
%
% *See GUI Options on GUIDE's Tools menu. Choose "GUI allows only one
% instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES
% Edit the above text to modify the response to help ui
% Last Modified by GUIDE v2.5 21-Nov-2015 17:35:56
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', #ui_OpeningFcn, ...
'gui_OutputFcn', #ui_OutputFcn, ...
'gui_LayoutFcn', [] , ...
'gui_Callback', []);
if nargin && ischar(varargin{1})
gui_State.gui_Callback = str2func(varargin{1});
end
if nargout
[varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT
% --- Executes just before ui is made visible.
function ui_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject handle to figure
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% varargin command line arguments to ui (see VARARGIN)
% Choose default command line output for ui
handles.output = hObject;
% Update handles structure
guidata(hObject, handles);
% Add "indexSelected" to handles struct and initialize it
my_gui_data=guidata(gcf)
my_gui_data.indexSelected=0;
guidata(gcf,my_gui_data);
% Disable pushbutton2 and pusbutton 3 (they will be enabled in pushbutton1
% callback)
set(handles.pushbutton2,'enable','off')
set(handles.pushbutton3,'enable','off')
% UIWAIT makes ui wait for user response (see UIRESUME)
% uiwait(handles.figure1);
% --- Outputs from this function are returned to the command line.
function varargout = ui_OutputFcn(hObject, eventdata, handles)
% varargout cell array for returning output args (see VARARGOUT);
% hObject handle to figure
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Get default command line output from handles structure
varargout{1} = handles.output;
% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Get GUI data
my_gui_data=guidata(gcf)
% Use guidata data struct instead of "global" variables
% global files;
% global dname;
dname = uigetdir('Select the dicom image folder');
% Check for directory selection validity
if(dname == 0)
set(handles.text2,'string','Dir selection aborted')
else
set(handles.text2, 'String', dname);
files = dir(fullfile(dname, '*.dcm'));
% Check for files presence
if(length(files) == 0)
set(handles.text2,'string',['No ".dcm" file in ' dname ' folder'])
else
% Enable pushbutton2 and pusbutton 3
set(handles.pushbutton2,'enable','on')
set(handles.pushbutton3,'enable','on')
% Use guidata data struct instead of "global" variables
% global indexSelected;
% Not needed, use fullfile to build the full file name
% dname = [dname '\'];
indexSelected = 1;
% filePath = [dname files(1).name];
filePath = fullfile(dname,files(1).name);
fileRead = dicomread(filePath);
imshow(fileRead, []);
% Store GUI data
my_gui_data.dname=dname;
my_gui_data.files=files;
my_gui_data.indexSelected=indexSelected;
my_gui_data.filePath=filePath;
guidata(gcf,my_gui_data);
end
end
% --- Executes on button press in pushbutton2.
function pushbutton2_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Use guidata data struct instead of "global" variables
% global indexSelected;
%
% global files;
% global dname;
my_gui_data=guidata(gcf);
indexSelected=my_gui_data.indexSelected;
files=my_gui_data.files;
dname=my_gui_data.dname;
if(indexSelected == 1)
indexSelected = length(files);
% Use "fullfile" to build the file name
% filePath = [dname files(indexSelected).name];
filePath = fullfile(dname,files(indexSelected).name);
fileRead = dicomread(filePath);
imshow(fileRead, []);
else
indexSelected = indexSelected - 1;
% Use "fullfile" to build the file name
% filePath = [dname files(indexSelected).name];
filePath = fullfile(dname,files(indexSelected).name);
fileRead = dicomread(filePath);
imshow(fileRead, []);
end
% Store GUI data
my_gui_data.filePath=filePath;
my_gui_data.indexSelected=indexSelected;
guidata(gcf,my_gui_data);
% --- Executes on button press in pushbutton3.
function pushbutton3_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton3 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Use guidata data struct instead of "global" variables
% global indexSelected;
%
% global files;
% global dname;
my_gui_data=guidata(gcf);
indexSelected=my_gui_data.indexSelected;
files=my_gui_data.files;
dname=my_gui_data.dname;
if(indexSelected == length(files))
indexSelected = 1 ;
% Use "fullfile" to build the file name
% filePath = [dname files(1).name];
filePath = fullfile(dname,files(1).name);
fileRead = dicomread(filePath);
imshow(fileRead,[]);
else
indexSelected = indexSelected + 1;
% Use "fullfile" to build the file name
% filePath = [dname files(indexSelected).name];
filePath = fullfile(dname,files(indexSelected).name);
fileRead = dicomread(filePath);
imshow(fileRead,[]);
end
% Store GUI data
my_gui_data.filePath=filePath;
my_gui_data.indexSelected=indexSelected;
guidata(gcf,my_gui_data);
% --- Executes during object creation, after setting all properties.
function axes1_CreateFcn(hObject, eventdata, handles)
% hObject handle to axes1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
% Hint: place code in OpeningFcn to populate axes1
% Set axes background color to black
set(hObject,'color','k')
% Remove X-axis and Y-axis ticks
set(gca,'xtick',[],'ytick',[])
The GUI just opened
The GUI with a DCOM image
Hope this helps.