Matlab:dicomread读取dicom文件函数

最新推荐文章于 2023-09-09 20:01:08 发布

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本文详细介绍了使用dicomread函数读取DICOM图像的方法，包括读取图像数据、颜色映射、透明通道和覆盖层。展示了如何通过指定文件名或元数据结构体来读取图像，并提供了创建图像拼贴和调整对比度的例子。

功能：读取 DICOM 图像

Syntax

X = dicomread(filename) X = dicomread(info)%% [X,map] = dicomread(...) [X,map,alpha] = dicomread(...) [X,map,alpha,overlays] = dicomread(...) [...] = dicomread(filename, 'frames', v) [...] = dicomread(___,'UseVRHeuristic',TF)

Description

X = dicomread(filename) 通过从dicom文件名，读取图像数据。（单帧图像，返回MxN数组；单帧彩色图像返回MxNx3数组；多帧图像返回4-D数组）。

X = dicomread(info) 通过读取Dicom头文件的元数据结构体，读取图像信息。

[X,map] = dicomread(...) returns the image X and the colormap map. If X is a grayscale or true-color image, map is empty.

[X,map,alpha] = dicomread(...) returns the image X, the colormap map, and an alpha channel matrix for X. The values of alpha are 0 if the pixel is opaque; otherwise they are row indices into map. The RGB value in map should be substituted for the value in X to use alpha. alpha has the same height and width as X and is 4-D for a multiframe image.

[X,map,alpha,overlays] = dicomread(...) returns the image X, the colormap map, an alpha channel matrix for X, and any overlays from the DICOM file. Each overlay is a 1-bit black and white image with the same height and width as X. If multiple overlays are present in the file, overlays is a 4-D multiframe image. If no overlays are in the file,overlays is empty.

[...] = dicomread(filename, 'frames', v) reads only the frames in the vector vfrom the image. v must be an integer scalar, a vector of integers, or the string 'all'. The default value is 'all'.

[...] = dicomread(___,'UseVRHeuristic',TF) instructs the parser to use a heuristic to help read certain noncompliant files which switch value representation (VR) modes incorrectly. dicomread displays a warning if the heuristic is used. When TFis true (the default), a small number of compliant files will not be read correctly. Set TFto false to read these compliant files.

Class Support

X can be uint8, int8, uint16, or int16. map must be double. alpha has the same size and type as X. overlays is a logical array.

Examples

Use dicomread to retrieve the data array, X, and colormap matrix, map, needed to create a montage.

[X, map] = dicomread('US-PAL-8-10x-echo.dcm');
montage(X, map, 'Size', [2 5]);

Call dicomread with the information retrieved from the DICOM file using dicominfoand display the image using imshow. Adjust the contrast of the image usingimcontrast.

info = dicominfo('CT-MONO2-16-ankle.dcm');
Y = dicomread(info);
figure, imshow(Y);
imcontrast;

常规例子：

info = dicominfo([dicom_pat_path '\' image_name]);%功能：图像处理函数，从指定的dicom文件中读取大量dicom元数据信息
CT = double(dicomread(info));