Question

在matlab中打开dicom文件时我得到了黑色图像

我打开dicom文件的代码

[real_image,real_path] = uigetfile( ...
{'*.*;','File Dicom (*.dcm)';},...
'Open Image');

if ~isequal(real_image,0)
handles.image = dicomread(fullfile(real_path,real_image));
guidata(hObject,handles);
axes(handles.axes1);
imshow(handles.image);

set(handles.text5,'String',real_image);
set(handles.text6,'String',real_path);

[row,column]=size(handles.image);
set(handles.text7,'String',row);
set(handles.text8,'String',column);

else
return;
end

Answer 1

我已经通过创建GUI（R2012b）并在按钮回调中插入代码来测试您的代码，它运行正常。

所以我可以看到两种可能性： - 您以某种方式加载的dcom图像已损坏 - dcom图片很好，这是contrast

的问题

我会选择第二种可能性。

我使用从DICOM sample image sets下载的dcom图片“CARDIX”作为示例。

当加载其中一个图像时，它似乎是黑色，轴的clim是[0 65535]。

如果您将clim范围分别设置为dcom图像数据值的minimum和maximum值，则可以开始“看到某些内容”。

要进一步增强图像的可见性，您可以使用imcontrast tool。

在下文中，您可以找到GUI的.m文件：imcontrast tool可以通过pushbutton运行。

function varargout = adjust_contrast(varargin)
% ADJUST_CONTRAST MATLAB code for adjust_contrast.fig
%      ADJUST_CONTRAST, by itself, creates a new ADJUST_CONTRAST or raises the existing
%      singleton*.
%
%      H = ADJUST_CONTRAST returns the handle to a new ADJUST_CONTRAST or the handle to
%      the existing singleton*.
%
%      ADJUST_CONTRAST('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in ADJUST_CONTRAST.M with the given input arguments.
%
%      ADJUST_CONTRAST('Property','Value',...) creates a new ADJUST_CONTRAST or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before adjust_contrast_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to adjust_contrast_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 adjust_contrast

% Last Modified by GUIDE v2.5 26-Dec-2015 10:44:54

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @adjust_contrast_OpeningFcn, ...
                   'gui_OutputFcn',  @adjust_contrast_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 adjust_contrast is made visible.
function adjust_contrast_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 adjust_contrast (see VARARGIN)

% Choose default command line output for adjust_contrast
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes adjust_contrast wait for user response (see UIRESUME)
% uiwait(handles.figure1);


% --- Outputs from this function are returned to the command line.
function varargout = adjust_contrast_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)


[real_image,real_path] = uigetfile( ...
   {'*.dcm;','File Dicom (*.dcm)';},...
   'Open Image');

if ~isequal(real_image,0)
   handles.image = dicomread(fullfile(real_path,real_image));
   guidata(hObject,handles);
   axes(handles.axes1);
   imshow(handles.image);

   set(handles.text5,'String',real_image);
   set(handles.text6,'String',real_path);

   [row,column]=size(handles.image);
   set(handles.text7,'String',row);
   set(handles.text8,'String',column);

else
   return;
end
% Set the "Clim" scale to the [min max] image values
set(gca,'clim',[min(min(handles.image)) max(max(handles.image))])


% --- 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)

imcontrast

在下图中您可以看到： - 显示为已加载的“黑色”图像 - 更新clim范围后的第一个增强点 - 使用imcontrast tool

“工作”获得的增强功能

注意：您可以从MATLAB Central下载DCOMViewer。

希望这有帮助。

需要帮助在matlab中打开dicom文件

1 个答案: