pixel values for image created with dicomwrite are different from the matrix pixel values?

I have a 3D matrix (say X) and want to write it as a 3D dicom, Y.dcm with meta data, meta (acquired using dicominfo on some other dicom file)

I conver my 3D matrix, X, into a 4D matrix Y (because the third dimension value of 1 is needed for photometric representation)

Here is the code : dicomwrite(Z,'name',meta,'CreateMode','Copy','MultiframeSingleFile',true) ;

This command WORKS, and gives me a dicom image. HOWEVER, when I look at the pixel intensities (using some other software or using dicomread to read the created dicom) I find that the pixel intensities DO NOT MATCH.

I'm using MRI dicoms . ..... Any thoughts? Suggestions? etc?

[Elham Yousefzadeh]

I have the same problem. did you find any answer for that?

[Muzamil]

Sorry it's been a while. I think Dicom images are int16 (or int32) where as matlab marix is in double so u need to convert from double to int before you use dicomwite.

Hope this helps

[Rik]

In general dicom images (at least CT images) will be saved in uint16, with only 12 bits used. The exact specifications are stored in the dicom header, see the dicom doc.