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ROI for abdomen

Posted: Fri Jul 03, 2020 2:22 pm
by isabel
When treating abdominal area specially pancreas what to include when defining ROI


Re: ROI for abdomen

Posted: Tue Jul 07, 2020 3:25 pm
by john_dorr
Within the past few months there was a few SGRT short videos from the SGRT community meetings. In it Abdomen ROI was shown. It was basically an upside-down horseshoe. Make sure you do NOT include the stomach to account for breathing. The sides of the abdomen can be included. See attached pics. We reached out to Align Rt and got excellent response back that went from almost giving up on a Pancreases case to having almost no shifts after cbct. There is also a small spiral bound booklet that we had sitting near the Linac Console with similar images of recommended ROIs for the abdomen. See attached Imagerecommendations from Align Rt.

"

For cases in pelvis or lower abdomen, this is best:

No belly motion involved.
Still get enough AP and Lat information
If still have some belly movement, 2 options:

Take gated reference capture

OR
Remove center area of the ROI; the ROI doesn’t need to connect in the middle
(between red dotted lines on the picture can be removed)
Keep in mind where the pillowcase is covering the patient.  Should look like what’s green.

Remember, anything that shows up very green on the patient, is above where the surface should be.  So if you see a lot of green within the ROI, your sheet is probably in the ROI."

Re: ROI for abdomen

Posted: Mon Feb 22, 2021 10:35 am
by daniel_vetterli
Hi John
unfortunately I don't see the attached pics. I appreciate if you could send tehm via email (daniel.vetterli@radioonkologie.ch)
Thanks, Daniel

Re: ROI for abdomen

Posted: Thu Mar 18, 2021 9:22 am
by jay_zheng
Do you do FB or DIBH for lower abdomen? Have a liver case, thinking to try it, any advice would be appreciated! Jay