Trying to give SBRT for an oligomet in the spine before the patient goes on to get carbo/Alimta/pembro. Med onc asking if there is a wash out period for the radiation. I'm thinking last fraction on a Friday, then start chemo on Monday should be enough time to avoid myelopathy. Radiobiologically, most DS-DNA repair from radiation happens in minutes to hours, so anything over 24 hours should be okay? Radbio instructors and PGY-5s, help me out!