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Re: Transferring image pixel values to a DICOM file [message #76976]

Wed, 20 July 2011 07:52

Vivek
Messages: 6
Registered: July 2011

Junior Member

On Jul 20, 6:37 am, David Platten <dplat...@gmail.com> wrote:
> Hi Vivek,
>
> I used to use another method to create computed tomography DICOM files containing my own image data. I took an existing DICOM image, opened it, and then wrote my new image data over the existing image data in the file, and then saved the file. It was a nasty way to do it, but it worked. The CT images I was working on always had 512x512 pixels. An example of the code is below. There must be a more elegant way of doing this!
>
> Regards,
>
> David
>
> PRO modifyDICOM
>
> ; create an array to hold the generated image
> x_dim = 512
> y_dim = 512
> new_data = INTARR(x_dim,y_dim)
> new_data[*,*] = 0
>
> ; generate some test data to write to the image
> ; a diagonal cross
> FOR x = 0, (x_dim-1) DO BEGIN
> new_data[x,x] = 1000
> new_data[(x_dim-1)-x,x] = 1000
> ENDFOR
>
> ; Or you could load in a tif file with your image data:
> ;image_array = read_tiff('c:\TEMP\StraightEdgeReallyBlurred.tif', channels=1)
> ;new_data = fix(image_array)
>
> ; Open an existing DICOM file to modify. This must have the
> ; same pixel dimensions as the one you want to create.
> dicomFile = DIALOG_PICKFILE(/MUST_EXIST)
>
> ; open the file for writing
> OPENU, dcmfile, dicomFile, /GET_LUN, /Append
> POINT_LUN, -dcmfile, a
>
> ;position file pointer 512*512 from end of file
> POINT_LUN, dcmfile, a-(512l*512*2)
>
> ; replace the pixel data with the generated data
> WRITEU, dcmfile, new_data
>
> ; close the file and free the lun
> CLOSE, dcmfile
> FREE_LUN, dcmfile
> END

Hi David,

I managed to get around with my issues thankfully :) But thanks for
the suggestion. I shall keep this in mind as well.

Regards,

Vivek

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[Message index]

		Re: Transferring image pixel values to a DICOM file By: Vivek on Wed, 20 July 2011 07:52
		Re: Transferring image pixel values to a DICOM file By: dplatten on Wed, 20 July 2011 03:37
		Re: Transferring image pixel values to a DICOM file By: Vivek on Tue, 19 July 2011 07:18
		Re: Transferring image pixel values to a DICOM file By: Vivek on Tue, 19 July 2011 07:06
		Re: Transferring image pixel values to a DICOM file By: dplatten on Tue, 19 July 2011 01:11

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