Modulated electron radiation therapy using a motorized multi-leaf collimator

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Electron radiation therapy has been used to treat shallow tumours for more than 50 years. Although every radiation therapy centre is equipped with linear accelerators generating electron fields, this treatment method has always been hampered by technical difficulties related to field collimation. Conformal field shaping is critical to spare normal tissues. We have developed an electron multi-leaf collimator prototype that automatically shapes the beam and generates sequences of therapeutic fields through a remote-control graphical user interface. We will develop precise dose calculation algorithms that will be part of a fast iterative treatment planning system.