Fig. 1
From: THUNDER 2: THeragnostic Utilities for Neoplastic DisEases of the Rectum by MRI guided radiotherapy
THUNDER 2: THeragnostic Utilities for Neoplastic DisEases of the Rectum by MRI guided radiotherapy treatment algorithm. LARC: locally advanced rectal cancer; CRT: chemoradiotherapy; GTV: gross tumor volume; ERI: early regression index; PTV: planning target volume; RT: radiation therapy; MR: magnetic resonance.