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Table 1 The optimization objective used for inverse IMRT planning

From: A comparative dosimetric study for treating left-sided breast cancer for small breast size using five different radiotherapy techniques: conventional tangential field, filed-in-filed, Tangential-IMRT, Multi-beam IMRT and VMAT

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%