signal intensity value in MRI dicom file
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Ranga Tudugala
le 28 Déc 2015
Commenté : Image Analyst
le 31 Déc 2015
Can Anybody help me to extract matlab code to extract signal intensity value in MRI dicom file with the corresponding pixel coordination? here i have attached dicom file Brain http://www.osirix-viewer.com/datasets/DATA/BRAINIX.zip
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harjeet singh
le 28 Déc 2015
hello Ranga use this to exract signal intensity
X = uint8(dicomread('IM-0001-0001'));
figure(1)
imshow(X)
pixel_co=[256 200];
pixel_vale=X(pixel_co(1),pixel_co(2))
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Walter Roberson
le 29 Déc 2015
If you get 0 every time then your data might have been negative and you should probably not have converted to uint8... as I cautioned could be a problem. Remove the uint8() part and try again and see what the values are.
Image Analyst
le 29 Déc 2015
If you remove uint8() and find that it is negative, you will probably have to use [] in imshow():
imshow(X, []);
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Image Analyst
le 29 Déc 2015
Try calling impixelinfo() to interactively view the value as you mouse around over the image.
grayImage = dicomread(fullFileName);
imshow(grayImage);
colorbar;
hp = impixelinfo();
Or you can call imtool().
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Ranga Tudugala
le 30 Déc 2015
7 commentaires
Image Analyst
le 31 Déc 2015
Well Star could answer better than me, but I'm reading "A pseudo CT...[snip]...was generated by deforming atlas CT images...[snip]. The required deformation for atlas CT images was derived from a nonlinear registration of conjugated atlas MR images"
So it sounds like they're aligning/warping CT images with the formula for warping based on MRI images, or what I called multi-modality registration. Maybe that's what you meant. I was thinking that you wanted to take MRI images and convert them to have it look just as if you'd taken a CT of the patient instead of an MRI. I think you can align CT or MRI volumes in a variety of ways, but I don't think you can get one from the other. Otherwise hospitals would not have two separate multi-million dollar instruments when they could get by with one.
Star, what do you think?
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