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Dose-volume histogram of a prostate stereotactic body radiation therapy (SBRT) plan illustrating 50 Gy delivered on protocol over five treatments. The patient was immobilized in a custom-designed setup including a rectal balloon to limit the collateral dose. Note the intensity-modulated radiation therapy–facilitated sparing of specifically the rectal wall (at the expense of the rectal lumen) to avoid circumferential damage to rectal mucosa clonagens.
