Table 1.

The optimization objective used for inverse IMRT planning

Structure	Planning aim
PTV	V52Gy ≤1%, V51Gy ≤ 4%; D50% = 50Gy; V49Gy ≥ 100%,V50Gy ≥ 95%
PRV-contralateral breast	Dmax ≤ 3Gy
PRV-left lung	V10Gy ≤ 30%; V20Gy ≤ 20%; V30Gy ≤ 10%
PRV-coronary artery region	V10Gy ≤ 25%, V20Gy ≤ 15%, V30Gy ≤ 5%
PRV-heart	V10Gy ≤ 20%; V20Gy ≤ 15%; V30Gy ≤ 20%