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Any diet restrictions with radiation? What were your side effects?

Prostate Cancer | Last Active: Jun 8, 2023 | Replies (46)
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@bens1

web265: Today I had my first mapping with the MRIdian. They did a quick CT scan first and then digitally fused it with the MRIdian machines built in MRI. I was in the MRIdian for about a half hour. They gave me a headset for music but also put some special glasses on me so that I could see a specially positioned screen with images of the Ocean which really made me feel as if I was not in a tube. Also, my RO told me today that a new randomized study's final results was released regarding the MRIdian and toxicity that showed that the requirement, at least at Orlando Health, for the margins for the MRIdian could now be narrowed from 3 cm to 2 cm.

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Replies to "web265: Today I had my first mapping with the MRIdian. They did a quick CT scan..."
rockin2047 | @rockin2047 | Jun 6, 2023

Hi bens1
What was the month and year of your MRIdian treatments? According to the Viewray MRIdian website as of June 5, 2023 it seems that they no longer use a CT scan but rather use their newest MRI machne which is integrated with a proton beam machine (Linac). No fusion of images are used. Could it be that your machine was an older model? The site says "Findings published on January 12, 2023, in JAMA Oncology demonstrate the superiority of MRIdian "MRI guidance" in stereotactic body radiotherapy (SBRT) for localized prostate cancer compared to "CT-guided" SBRT. Then says MIRAGE phase III randomized controlled trial (NCT04384770) shows a significant reduction in acute (≤90 days) genitourinary (GU) and gastrointestinal (GI) side effects with MRIdian MRI-guided versus CT-guided SBRT." I believe Viewray mentioned that fiducial markers are no longer required, however is SpaceOar still being inserted? Is it possible I'm confusing your CT scan for "mapping purposes" with a radiation treatment which uses a CT scan along with a proton beam machine? More detail would be helpful.

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