I am So sorry to read of your 2nd diagnosis, TaraJ​ I hope you are getting plenty of support, as it can muck with your brain a bit xx. Give our Helpline a call on 1800 500 258 if you'd like to have a private Chat xx
I hadn't heard of IORT before you mentioned it - it sounds a terrific idea to do it during surgery! Peter MaCallum Cancer Centre in Melbourne does it ... It will probably become more 'common place' once other hospitals/Cancer Centres are set up for it.
https://www.petermac.org/patients-and-carers/treatments/radiation-therapy/intraoperative-radiation-therapy-iort
Wishing you all the best for your surgery & IORT xx