Pre-operative RadiothErapy for Soft Tissue SarcOmas

"Shorter radiation therapy means that a higher dose will be given on a daily basis. The goal is to target microscopic disease and decrease the chances of local recurrence.~Organs at risk (OAR) will receive doses following the constraints from the Timmerman tables used for reference when using 5 or more fractions of EBRT.~Treatment will be delivered every 2nd day, for a maximum of 3 fractions per week. Daily pretreatment Image Guided Radiotherapy Images (IGRT) (Cone-Beam CT - CBCT) will be co-registered with the CT simulation dataset to adjust patient position before each treatment by matching the bone adjacent to the planned tumour volume (PTV). Treatment will be administered if there is \<3 mm in any dimension, or rotation is \<3 degrees. If the isocentre set-up exceeds 3 mm at any given treatment session, the treatment couch will be translated to restore its planned position."