Functional imaging equivalence and proof of concept for image-guided adaptive radiotherapy with fixed gantry and rotating couch oleh Ilana Feain, PhD, Chun-Chien Shieh, PhD, Paul White, MMedPhys, Ricky O'Brien, PhD, Sandra Fisher, MMedPhys, William Counter, PhD, Peter Lazarakis, PhD, David Stewart, BRadTherapy, Simon Downes, MMedPhys, Michael Jackson, MBBS, Siddhartha Baxi, MBBS, Brendan Whelan, PhD, Kuldeep Makhija, BSc, Chen-Yu Huang, PhD, Michael Barton, MBBS, Paul Keall, PhD