Can plastimatch convert dose volume to RTDOSE dcm file?

[fcj...@gmail.com]

Hi all:

    I know that plastimatch can convert RTDOSE DICOM files to dose volumes by using the following command:

    plastimatch convert --input RTDOSE.dcm --output-dose-img RTDOSE.nii.gz

    Is this process reversible i.e. can plastimatch convert dose volumes to RTDOSE DICOM files? I already have CT, RTSTRUCT, RTPLAN DICOM files, and a dose volume file named RTDOSE.nii.gz. How can I generate a RTDOSE DICOM file with these files?

[Sharp, Gregory C.]

Indeed it is possible.  You need to tell plastimatch that the image represents a dose.

 

plastimatch convert --input-dose-img RTDOSE.nii.gz --output-dicom dicom-dir

 

To play nicely with other systems, the RTDOSE should reference the RTSTRUCT.  (Just as the RTSTRUCT should reference the CT image.)  So you should either convert them together, or else you can use --referenced-ct to link the UIDs.

 

 

From: plast...@googlegroups.com <plast...@googlegroups.com> On Behalf Of fcj...@gmail.com
Sent: Friday, December 18, 2020 5:24 AM
To: Plastimatch <plast...@googlegroups.com>
Subject: [Plastimatch] Can plastimatch convert dose volume to RTDOSE dcm file?

 

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[fcj...@gmail.com]

Hi Greg:

    Thanks for your reply. 

    Does convert them together means the following command?

    plastimatch convert --input-dose-img RTDOSE.nii.gz --input-ss-img RTSTRUCT.dcm --output-dicom output-dicom-dir

    But I got a itk::ImageFileReaderException error.

[Sharp, Gregory C.]

No, that won't work.  The RTSTRUCT.dcm must be in a directory, and loaded by --referenced-ct.  For example:

 

plastimatch convert --input-dose-img RTDOSE.nii.gz --referenced-ct struct-dir --output-dicom output-dir

 

With the RTSTRUCT.dcm in struct-dir.

To view this discussion on the web visit https://groups.google.com/d/msgid/plastimatch/1ad0410a-5560-4059-8552-3375db229301n%40googlegroups.com.

[fcj...@gmail.com]

Hi Greg:

    Thanks to your method, I got a dose_xxxxx.dcm file in the output-dir. But I still have two questions:

    1. The dose_xxxxx.dcm file was an ANONYMOUS one, so I added --patient-id <arg> and --patient-name <arg> to the command and got an normal one. But I wonder that the patient-id and patient-name was already in the referenced RTSTRUCT.dcm, why the dose_xxxxx.dcm didn't get them.

    2. Why was the dose_xxxxx.dcm file so big? All the CT and RTSTRUCT dcm files were 57.4M in total, but the dose_xxxxx.dcm file was 102M. Can the output file size be reduced?

[fcj...@gmail.com]

Excuse me, can the output dose_xxxxx.dcm file size be reduced?

[Sharp, Gregory C.]

Hi Fc,

I'm sorry for the delay, it's been a long month.

I think the easiest way to resize the dose is as a nrrd or nii.gz format, and then convert to dicom after resizing.

I'm not sure that I can answer as to why the file is so big.  Where did the file come from?  In any case, the DICOM is not compressed for best compatibility. 

Greg

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From: plast...@googlegroups.com <plast...@googlegroups.com> on behalf of fcj...@gmail.com <fcj...@gmail.com>
Sent: Wednesday, March 3, 2021 9:53 PM

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