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How to use the software
Andreas Gravgaard Andersen edited this page Apr 25, 2018
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The following list will guide you through how to do a complete CB scatter correction.
-
open
the directory containing the projection data, i.e. *.hnd, *.xim, *.xvi - If elekta projections
open
a geometry file (generated from RTK) - Press LOAD and answer the prompts on screen (skip to 7. if the planCT was loaded and immediate reconstruction was chosen)
- Do Beam hardening and bowtie correction of projections if necessary.
- Load Plan CT, from DICOM folder or mha file.
- In the view menu select
Registration
. - Set Fixed Image to
RAW_CBCT
and Moving Image toMANUAL_CT
- Check Keyboard and use the arrow keys + PageUp and PageDown to do a rough rigid registration.
- Optional: Press
Gradient
, to let plastimatch improve theMANUAL_CT
registration - Press
Do registration
in the "Plastimatch-rigid body" box to let plastimatch do the final rigid registration and set the image size and resolution to that of theRAW_CBCT
. - Press
Do registration
in the "Plastimatch-deformable" box, (optionally change the values and add steps first). - If you are happy with the deformable registration, proceed to 13. otherwise set Moving Image to
AUTO_RIGID_CT
and go back to 11. and do the optional part. - Back in the main window, press
Correct
to do the scatter correction. - If you are happy, you can export the files from the
file
menu. Otherwise, pressReLoad Proj.
, change some settings, make sure Moving Image isDEFORMED_CT_FINAL
, and try again.
There are a lot of features and settings in the program. I recommend loading some data and then just clicking on everything, play around, see what happens. In most cases the standard output will explain what happened or what didn't.