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Re: pixel size in DICOM images [message #52697 is a reply to message #52696]

Tue, 27 February 2007 06:54

Mike[2]
Messages: 99
Registered: December 2005

Member

On Feb 27, 9:32 am, Peter Clinch <p.j.cli...@dundee.ac.uk> wrote:
> As far as I can tell the QUERY_DICOM routine doesn't actually tell me
> the pixel size (i.e., mm in the original target, not number of pixels
> making up the image) of an image. Which is a shame, as I'd really like
> to know what that is!
>
> Have I got that wrong, or are there any suggestions from The Team as to
> how I'd most easily go about getting that?

To get the pixel size and image dimensions, you can use IDLffDICOM:

IDL> dcm = obj_new('IDLffDICOM')
IDL> var = dcm->read(filename)
IDL> Nx = *(dcm->getvalue('0028'x,'0010'x))[0]
IDL> Ny = *(dcm->getvalue('0028'x,'0011'x))[0]
IDL> pixel_size = *(dcm->getvalue('0028'x,'0030'x))[0]
IDL> help, Nx, Ny, pixel_size
NX UINT = 512
NY UINT = 512
PIXEL_SIZE STRING = '0.9765625\0.9765625 '
IDL> print, float(strsplit(pixel_size, '\', /extract))
0.976562 0.976562

Although I often use the DICOM standard to look up group/element
pairs, it is even easier to use IDLffDICOM::dumpelements:

IDL> dcm->dumpelements

Regards, Mike

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[Message index]

		Re: pixel size in DICOM images By: Peter Clinch on Tue, 27 February 2007 07:04
		Re: pixel size in DICOM images By: Mike[2] on Tue, 27 February 2007 06:54
		Re: pixel size in DICOM images By: Jo Klein on Tue, 27 February 2007 06:54

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