lung segmentation in MR-Dataset

7 次查看（过去 30 天）
rocketMan
rocketMan 2021-7-6
编辑： Christine Poon 2024-8-7
Hello,
does anybody know a way to segment Lungs from mri-dataset? I foud many ways to segment them in CT, but not in MR.
I tried the otsu and the k-means methods, but the heart is alway segmented with the lungs

请先登录，再回答此问题。

回答（2 个）

Image Analyst
Image Analyst 2021-7-6
  4 个评论
显示 2更早的评论
rocketMan
rocketMan 2021-7-8
I would love that, but unfortunately I can't share anything because of privacy issues :(
the code, that you posted ist for CT-segmentation, did I understood it right?
Image Analyst
Image Analyst 2021-7-8
That's what the filename indicates. I haven't looked at it in a long time. Good luck. I'll be back in 3 or 4 days.

请先登录，再进行评论。

Christine Poon
Christine Poon 2024-8-2
编辑：Christine Poon 2024-8-7
Hi there, I recently segmented the lungs/the thoracic cavity from thoracic MRI scan images using activecontours to create lung masks. My basic approach is:
% 1. Import your mri image e.g.
X = dicomread(fullfile(folderPath, maskfile.name));
% 2. adjust image & grayscale levels
X = imadjust(X);
GS = im2gray(X);
% 3. Adaptive grayscale thresholding (find a suitable threshold value for your images)
meanGL = mean(GS(:));
BW = GS > 0.75*meanGL; % example
% 4. Apply activecontours
BWMask = activecontour(X,BW,100,"chan-vese",...
"ContractionBias",-0.1,"SmoothFactor",0.05); % adjust contraction bias depending on grayscale level
BWMask = rescale(BWMask);
% 5. Invert the mask (imcomplement), binarize, remove borders then select the lungs based on geometrical properties
Sample mask output (Left) and superimposed on the respective scan image (Right):
Hope this helps and feel free to reach out for the full solution!
  2 个评论
Image Analyst
Image Analyst 2024-8-5
You forgot to attach an image that your algorithm works well on. Can you do so? Can you also please attach the full solution (m-file)?
Christine Poon
Christine Poon 2024-8-5
编辑：Christine Poon 2024-8-7
Attached! I was just waiting on confirmation from a research group that I can share sample mask images as I wrote this code for the segmentation and analysis of their MRI images. Please also see some declassified sample output mask images from the documentation for my code bundle:
Active contours works well for this image set. There is no need to manually select seed points and only the occasional mask where parts of the thoracic boundary are blurred/blend into the stomach cavity required manual editing. I also developed and applied a vessel filter to the masks after active contour segmentation.
All proof of original work can be provided.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Image Segmentation 的更多信息

标签

产品


版本

R2020b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by