Device for providing a radiation treatment

A device for providing a radiation treatment to a patient, the device comprising:

• an electron source for providing a beam of electrons, and
• a linear accelerator for accelerating said beam to a predetermined energy, the accelerated beam being composed of a plurality of trains of electrons bunches, and
• a beam delivery module for delivering the plurality of trains of electrons bunches from said linear accelerator toward the patient to treat a target volume with a radiation dose,
• characterized in that the device further comprises an intensity modulation means configured to modulate distribution of a radiation dose in the target volume according to a predetermined modulation pattern matching the target volume,
• the intensity modulation means are configured to adjust a position, a total charge and energy of each electrons bunch within a train and between trains of electrons bunches, and to separate the trains of electrons bunches depending on the total charge and/or energy of each train,
• the modulation pattern comprising several subsections and each subsection of said several subsections comprising trains of electron bunches with a determined charge and energy to irradiate a corresponding portion of the target volume so that the intensity modulation means allows a set radiation dose received by each portion of the target volume,
• the modulation pattern is determined to match the dimensions of the target volume wherein the target volume is at least about 50 cm3, and/or the target volume is located at least 5 cm deep in a tissue of the patient with said radiation dose,
• the device being further characterized in that the radiation dose distributed by said intensity modulation means is at least 20 Gy, the radiation dose being delivered during an overall treatment time less than 50 ms.