Patent Number: 
Section: claims

1. A multi-purpose radiation therapy system, comprising a base, a movable couch, a rotatable gantry, and a radiotherapeutic apparatus, the movable couch and the rotatable gantry being arranged on the base, and the radiotherapeutic apparatus being movably installed on the rotatable gantry, wherein, the radiotherapeutic apparatus comprises a multi-source focusing radiotherapeutic unit and an adaptive intensity modulated radiotherapeutic unit and the multi-source focusing radiotherapeutic unit and the adaptive intensity modulated radiotherapeutic unit are distributed at both sides of a rotatable gantry axis, and are connected via respective arc guide rail. 2. The multi-purpose radiation therapy system according to claim 1, wherein an angle from the multi-source focusing radiotherapeutic unit to the adaptive intensity modulated radiotherapeutic unit relative to the axis center of the rotatable gantry is continuously adjustable between 30 degrees and 180 degrees. 3. The multi-purpose radiation therapy system according to claim 1, wherein the multi-source focusing radiotherapeutic unit and the adaptive intensity modulated radiotherapeutic unit respectively swings around a focal point on a rotatable gantry axial plane, and a swinging angle is in a range of 0 to ±47.5 degrees. 4. The multi-purpose radiation therapy system according to claim 1, wherein the rotatable gantry is 360-degree rotatable around the rotatable gantry axis in a continuous or reciprocal manner, to drive the multi-source focusing radiotherapeutic unit and the adaptive intensity modulated radiotherapeutic unit that are connected to the rotatable gantry to continuously or reciprocally rotate 360 degrees around the rotatable gantry axis. 5. The multi-purpose radiation therapy system according to claim 4, wherein an incident angle of the multi-source focusing radiotherapeutic unit and the adaptive intensity modulated radiotherapeutic unit exceeds 2π. 6. The multi-purpose radiation therapy system according to claim 1, further comprising a dynamic image guide system, a set of stereo imaging apparatus or two sets of stereo imaging apparatuses at a fixed angle are installed on the rotatable gantry with the same focal point. 7. The multi-purpose radiation therapy system according to claim 6, wherein an angle between two sets of imaging apparatuses in the stereo imaging apparatuses is in a range of 20 degrees to 160 degrees. 8. The multi-purpose radiation therapy system according to claim 1, wherein the multi-source focusing radiotherapeutic unit comprises a plurality of radioactive sources, a precollimator, and a movable collimator, and rays of the radioactive sources pass through the precollimator and the movable collimator, and are focused on one point, to form a focused field. 9. The multi-purpose radiation therapy system according claim 8, wherein the movable collimator is provided with apertures in different size, and the movable collimator is configured to switch the apertures to change a size and a shape of the focused field. 10. The multi-purpose radiation therapy system according to claim 1, wherein the adaptive intensity modulated radiotherapeutic unit comprises a radioactive source, a precollimator, and a multi-leaf collimator. 11. The multi-purpose radiation therapy system according to claim 10, wherein the radioactive source of the adaptive intensity modulated radiotherapeutic unit is a single cobalt source or an X ray generator having an intensity greater than 4 mV.