Dear all,

I am a student working with reconstruction of images .. recently we
have got images from a cone beam CT and reconstrcuted them in DICOM
Format.. I donno what went wrong .We could not open the reconstructed
images in treatment planning system like OTP etc. .. we are trying to
figure out the best possiblities and well i believe there must be
something wrong with the tagging ( guess ) .. like for other images
there were many tages .. but for our images there are only few.. it may

look bit silly comparing them directly. I am just working on it ..
trying to add tags to the our image. Hope it would work ..
Please someone help to get some information about DICOM Tags or is
there any other way solving this problem. I am really looking forward
for any precious suggestions and advise ..


thank you so much in advance


regards
Dan

to transfer the images to TPS . I am under the opinion that if I
change the DICOM Format with an Editor, there is a possibility to open
them in TPS.

Could you please tell which tags are really important for TPS to open
an Reconstructed Image .

1. Is the problem with a specific image set or all images sent to the
Treatment Planning System (TPS) ??

The problem is only with the specific Image data set ( self -
reconstructed Images Only ! )

2.How are you transferring the images to the TPS? Can you transfer
successfully? Does the TPS give any error messages when attempting to
open the images ??

The reconstructed Images were generated in DICOM Format so we are just
transfering them in a regular fashion like the data sets are in the CD
, so copying them in the treatment planning system and trying to open
them. BUT it says there is no image found.

3.Are you only sending the reconstructed images to the Treatment
Planning System (TPS)? If sending other images that are not
reconstructed, can they be opened?

Yeah the images other than the reconstructed ones can be opened easily.
so the problem is only with reconstructed Images . Well I am trying to
change the DICOM tags with an editor .. still there is problem , i mean
TPS does not open them.

xrayspectrum@googlemail.com wrote:

to transfer the images to TPS . I am under the opinion that if I
change the DICOM Format with an Editor, there is a possibility to open
them in TPS.

I am not sure this opinion is correct. Exactly what Editor are you
using?


Could you please tell which tags are really important for TPS to open
an Reconstructed Image .

The SOP Class needs to be the Secondary Capture UID value. The image
must have a Study Instance UID, Series Instance UID, and a SOP Instance
UID. The other critical information is in Group 28. These fields
include Number of Planes, Photometric Interpretation, Rows, Columns,
Bits Allocated, Bits Stored, and High Bit. There are a few other
required fields, but this should at least get the image to display.


1. Is the problem with a specific image set or all images sent to the
Treatment Planning System (TPS) ??

The problem is only with the specific Image data set ( self -
reconstructed Images Only ! )

Let me clarify. Do all of your reconstructed images have this problem?


2.How are you transferring the images to the TPS? Can you transfer
successfully? Does the TPS give any error messages when attempting to
open the images ??

The reconstructed Images were generated in DICOM Format so we are just
transfering them in a regular fashion like the data sets are in the CD
, so copying them in the treatment planning system and trying to open
them. BUT it says there is no image found.

Actually, the regular fashion is to transfer the images over a network
association using the DICOM Protocol. However, the images can be
transferred via CD. Are there other DICOM images, not reconstructed,
on the CD as well? If so, can those DICOM images be displayed?

You have to be careful when copying DICOM images from one device to
another. Reason. Byte Order Transfer. Intel computers use Little
Endian byte order. Sun, Motorola, and PowerPC use Big Endian byte
order. Copying DICOM images from a Little Endian to a Big Endian, and
visa versa, will cause problems as you are describing here. Plus, the
DICOM image itself states the byte order with its Transfer Syntax.


3.Are you only sending the reconstructed images to the Treatment
Planning System (TPS)? If sending other images that are not
reconstructed, can they be opened?

Yeah the images other than the reconstructed ones can be opened easily.
so the problem is only with reconstructed Images . Well I am trying to
change the DICOM tags with an editor .. still there is problem , i mean
TPS does not open them.


Have you tried to view the reconstructed images with some free viewer
software? If so, what were the results?

Bill

I wish to send you the image as an attachment , May I send you through
ur yahoo ID ?

thanks once again,

regards,
Dan