A radiation therapy system is proposed. The system has a magnetic resonance imaging device with a first and second magnetic coil units distanced from one another by a gap. The coil units interact to generate a magnetic field propagating along a longitudinal axis. The system has a linear accelerator arranged at a radial distance from the longitudinal axis in the gap or in the radial extension of the gap. The system also has a high frequency shielding arrangement with a first and second high frequency shielding cabins arranged adjacent to the first and second magnetic coil units respectively and high frequency sealed connected to one another with a tubular high frequency shielding unit arranged along the longitudinal axis within the first and second magnetic coil units. A high frequency shielding concept is independent of an embodiment of the magnetic system of the imaging device and is universally applicable.
