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Fiducial markers- are they necessary?
Prostate Cancer | Last Active: Oct 24, 2025 | Replies (23)Comment receiving replies
No fiducial markers here, just three permanent dot tattoos that were used each of my 5 sbrt sessions for the initial alignment on the gantry table, then the MRIdian linac took over each time.
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@beachguy As I understand, fiducial markers aren't required for MRI-Guided radiotherapy. In the cancer center where I was treated last April, there's only one MRI-Guided Linac machine, my radiation oncologist told me it's used for patients who couldn't (unable to) have fiducial markers. I was treated with one of their many non-MRI guided Linacs because I had fiducials.
(I was told that I had MRI-Guided radio planning, with a mini-CT scan (to compare with the planning images and make adjustments to compensate for the gland's position shift) before each treatment. It seems to me that the procedure worked; I haven't experienced post-SBRT toxicity the past 6 months, hoping for no long-term side effects.)
Just my experience which I can't and won't say if typical.