Course book Advanced Treatment Planning 2018

PTV prescription: SIB treatment

• 1)

Primary + Positive lymph nods (GTV + margin) ➢ PTV1: 66 Gy @ 2.2 Gy/fr

• 2) High risk lymph-nodal compartments (CTV1 + margin) (r2, r3, r5) ➢ PTV2: 60 Gy @ 2 Gy/fr • 3) Low risk lymph-nodal compartments (CTV2 + margin) (r4, l2, l3, l4, l5, r1b, l1b, retropharyngeal) ➢ PTV3: 54 Gy @ 1.8 Gy/fr

95% of Dose at 95% of volumes 105% of Dose at 5% of volumes