Matlab 3D 体积可视化 - dicom 文件 [英] Matlab 3D Volume visualization - dicom file

问题描述

我期待将 3D 矩阵从 dicom 文件可视化到 matlab 中.由于我对 matlab 不太熟悉，我设法从 这篇文章中获得帮助:

I am looking forward to visualize a 3D matrix into matlab from dicom files. As I am not quite familiar with matlab, i managed to get help from this post:

不同之处在于我的矩阵不是由 1 和 0 组成，而是由负数组成，这些负数用 imshow(dicomeread(dicomFile))

The difference is that my matrix is not made of 1 and 0 but negative numbers that are correctly red with imshow(dicomeread(dicomFile))

如何获得相同的对比度但使用 3D 渲染?

How can I get to the same contrast but with a 3D rendering ?

我的代码:

dicomFilesZm = dir(fullfile(myDcmFolder, 'SLZ-*.dcm')); %Get files name
dicomFilesZp = dir(fullfile(myDcmFolder, 'SLZ+*.dcm')); %~

Z = dicomFilesZm(end:-1:1); % sort

dicomFilesZ = [Z ; dicomFilesZp]; % recompose final array with files name

Iz1 = fullfile(myDcmFolder, dicomFilesZ(1).name); 
v = NaN([size(dicomread(Iz1)) numel(dicomFilesZ)]); % creation of empty matrix with the good size    
for i = 1 : numel(dicomFilesZ)
    Iz = fullfile(myDcmFolder, dicomFilesZ(i).name);
    v(:,:,i) = dicomread(Iz); % fill the matrix with each image
end

p = patch( isosurface(v,0) );
isonormals(v, p)
set(p, 'FaceColor','r', 'EdgeColor','none')
daspect([1 1 1])

感谢您的帮助.

推荐答案

解决问题的两个选项:

1. 天真，你为什么不设置 v=v+min(v(:)) 这样图像将从零缩放到不同的最大值?

1. Naively, why won't you just set v=v+min(v(:)) so the image will scale from zero to a different maximum value?

为什么带有负等值的 isosurface(V,isovalue) 不能为您解决这个问题?或者，如果您想循环 (-n:step_size:m) 中的 isovalues 以获得您想要的动态范围(使用一些 alpha(0.2) 来查看您想要的图层)

Why won't isosurface(V,isovalue) with negative isovlaue solve this issue for you? Or if you want loop over isovalues from (-n:step_size:m) to get the dynamic range you want (with some alpha(0.2) to see the layers you want)

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