ATP Barcelona 2017

MLC versus Cerrobend blocking shielding by using cerrobend blocks is always the best ∆ quality with MLC shielding depends on : - MLC geometry (1cm, 0.5cm, 0.2cm, ..cm) - size of PTV - shape of PTV ‘normally’ MLC will do just fine, but be aware of it’s limitations

optimize on collimator rotation