For what it's worth, irrespective of dicom, MRI images are typically
just a list of numbers; I can't speak for other manufacturers, but
with GE, 16 bit ints. (Why ints not floats I'm not sure, since the
image data have been fourier transformed, but that's how I open 'em
and it works.)
The image arrays are typically 256 X 256 or 512 x 512, which enables
a simple calculation of the actual data size in an image file. I
usually open images in Matlab (dicom and pre-dicom both) by assuming
that all the file header stuff is at the front, and that that last 2
x 256 X 256 X n^2 bytes (n = 1 or 2) is the desired image data. Read
this into a matlab array, and use the imagesc command with axis
square and colormap gray. You may have to transpose the array to get
the orientation correct.
I hope this helps.
Best regards and good luck
Jim
James Tropp Ph. D.
Senior Scientist
Applied Sciences Radiofrequency Group
GE Healthcare
47697 Westinghouse Dr.
Fremont CA 94539
email@hidden
**********
Hi All,
Perhaps someone here knows the answer to this or can point me in the right
direction.
A friend of mine was asking me if I knew what (if any) the standard datafile
format is for MRI images and if there is software (free or commercial) that
can be used for viewing them on a Mac or PC. I told him I didn't know and
that I'd ask around. He wan't to make a quicktime or avi of the various
slices from his wifes MRI scan of her shoulder.
Any information would be greatly appreciated.
Dave
David W. Gohara, Ph.D.
Harvard Medical School
http://www.scianafilms.com
617-432-1216 (p)
617-432-4360 (f)
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