A Low-Dose Ipsilateral Lung Restriction Improves 3-D Conformal Planning for Partial Breast Radiation Therapy
✍ Scribed by Tracy Mitchell; Pauline T. Truong; Lee Salter; Cathy Graham; Helene Gaffney; Wayne Beckham; Ivo A. Olivotto
- Publisher
- Elsevier Science
- Year
- 2011
- Tongue
- English
- Weight
- 785 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0958-3947
No coin nor oath required. For personal study only.
✦ Synopsis
In trials of 3D conformal external beam partial breast radiotherapy (PBRT), the dosimetrist must balance the priorities of achieving high conformity to the target versus minimizing low-dose exposure to the normal structures. This study highlights the caveat that in the absence of a low-dose lung restriction, the use of relatively en-face fields may meet trial-defined requirements but expose the ipsilateral lung to unnecessary low-dose radiation. Adding a low-dose restriction that ≤ 20% of the ipsilateral lung should receive 10% of the prescribed dose resulted in successful plans in 88% of cases. This low-dose lung limit should be used in PBRT planning.