Figure 2: Bar diagram of the acceptance criteria of IMRT plans followed by the hospitals for pre-treatment dose verification; A: 5% dose difference and 3 mm DTA; B: 3% dose difference and 3mm DTA ; C: 3% dose difference and 3mm DTA (Large field); 2% dose difference and 2mm DTA (Small field); D: 4% dose difference and 3mm DTA (Low dose low gradient) , 3% dose difference and 3mm ( High dose low gradient) 5-7% dose difference and 4mm DTA (Low dose high gradient) 3- 5% dose difference and 4mm DTA (High dose high gradient); E: 2% dose difference and 2 mm DTA ; F: 3% dose difference and 3 mm DTA/ 5% dose difference and 5 mm DTA (in some specific cases); G: inadequate information.