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CommunityRadiation Oncology

What margins (CTV and PTV) do you use for palliation when using Quad Shot regimen?

And does this differ by site (e.g. gyn vs head and neck)?
4 Answers
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Radiation Oncology · Prostate Cancer Institute of America
Answered on

Since this is palliation and generally used for patients with limited longevity, there shouldn’t be a need for a CTV expansion for quad shot. You may use your typical location specific expansion, keeping in mind the particular needs of the patient - their ability to remain immobile and recreate a re...

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Radiation Oncology · Varian Medical Systems/Allegheny health network
Answered on

GTV only with a PTV margin of 5 - 10 mm based on location and patient related factors.

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Radiation Oncology · UCLA | VA Greater Los Angeles Healthcare System
Answered on

I love quad shot, and of course, reading QuadShot News. But when it comes to margins, I’ll share a story that’s worth a thousand words - and a textbook chapter that would otherwise put us to sleep.

A demented patient with widely metastatic H&N ca, whose wife refused chemo, was once referred to me fo...

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Radiation Oncology · Michigan Healthcare Professionals, PC
Answered on

Nothing should change based on intent, except for the omission of CTV.

ICRU fundamentals apply to curative and non-curative treatment. Contour a GTV (+/- CTV depending on intent), then add a PTV for set up error/motion. This applies to all palliation with visible tumor - doesn’t matter if it’s QS, ...

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