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Even though the optimal dose of RT has not yet established for SBP,
it is recommended a radiation dose of at least 40 Gy in 20 fractions
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Local control rates of 94% with doses over 40 Gy, dropped to 64% with
doses lower than 40 Gy
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In clinical practice, a radiation dose of 45-50 Gy with 2 Gy daily
fractions is usually recommended