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How to calculate actual size of an object in a dicom image?

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Sparkle89
Sparkle89 2019-3-30
编辑： nehad mohamed 2021-1-10
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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Image Analyst
Image Analyst 2019-3-30
Hopefully there is something in your dicom header that gives the spatial calibration in real world units per pixel.
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Sparkle89
Sparkle89 2019-3-30
Thank you Sir.
Pixelspacing returns spacing in mms.
Therefore is the following calculation of size obtained by multiplying area obtained from regioprops by [pixelspacing.x pixelspacing.y] correct?
%PixelSpacing value from dicom header
% area returned by regionprops
area_in_mm = area .* [PixelSpacing.xvalue PixelSpacing.yvalue];

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nehad mohamed
nehad mohamed 2021-1-7
I want a tool like a ruler to measure distances in dicom images. In cm. using matlab
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Image Analyst
Image Analyst 2021-1-9
编辑：Image Analyst 2021-1-9
nehad, it looks to me like you totally ignored my comment when I asked you to read this link:
TUTORIAL: How to ask a question (on Answers) and get a fast answer
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
Walter Roberson 2021-1-9
Take. A. Picture. Of. The. Error. Message. And. Attach. The. Picture. 🥺

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nehad mohamed
nehad mohamed 2021-1-10
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nehad mohamed
nehad mohamed 2021-1-10
编辑：nehad mohamed 2021-1-10
this my error and my code
iwant tools like ruler to measure distance and save this distance in excel sheet
Image Analyst
Image Analyst 2021-1-10
Again:
nehad, it looks to me like you totally ignored my comment when I asked you to read this link:
TUTORIAL: How to ask a question (on Answers) and get a fast answer
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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