How to calculate actual size of an object in a dicom image?
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I have a dicom image of CT scan. Regionprops returns area in pixels. Is there any other way in Matlab to get the actual sizein cms/mms?
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Accepted Answer
Image Analyst
on 30 Mar 2019
Hopefully there is something in your dicom header that gives the spatial calibration in real world units per pixel.
4 Comments
Image Analyst
on 30 Mar 2019
No, more like
area_in_mm = area * PixelSpacing.xvalue * PixelSpacing.yvalue;
More Answers (2)
nehad mohamed
on 7 Jan 2021
I want a tool like a ruler to measure distances in dicom images. In cm. using matlab
9 Comments
Image Analyst
on 9 Jan 2021
Edited: Image Analyst
on 9 Jan 2021
nehad, it looks to me like you totally ignored my comment when I asked you to read this link:
Your last comment proves that. So after you read that, start your own discussion thread since this is not an official Answer to Sparkle89's question, and we don't want to be sending them emails with every post about this non-Answer.
Walter Roberson
on 9 Jan 2021
Take. A. Picture. Of. The. Error. Message. And. Attach. The. Picture. 🥺
nehad mohamed
on 10 Jan 2021
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/483853/image.png)
2 Comments
nehad mohamed
on 10 Jan 2021
Edited: nehad mohamed
on 10 Jan 2021
this my error and my code
iwant tools like ruler to measure distance and save this distance in excel sheet
Image Analyst
on 10 Jan 2021
Again:
nehad, it looks to me like you totally ignored my comment when I asked you to read this link:
Your last comment proves that. So after you read that, start your own discussion thread since this is not an official Answer to Sparkle89's question, and we don't want to be sending them emails with every post about this non-Answer.
If you want, you can put a link to your new thread back here. That's all.
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