SBRT 2016

Random Error and Minimum Dose Requirement

 The margin for random decreases with decreasing prescription isodose line / minimum dose requirement

95% 2 ) − βσ p 73%

M = β√(σ 2 +σ p

50%

Prescription level

β

95% 80% 70% 60%

1.64 0.84 0.52 0.25