Neutron capture therapy system

A neutron capture therapy system comprising:

• a neutron generating device comprising an accelerator and a target, wherein a charged particle beam generated by acceleration of the accelerator acts with the target to generate a neutron beam;
• a beam shaping assembly comprising:
• a moderator configured to moderate the neutrons generated from the target to an epithermal neutron energy range,
• a reflector surrounding the moderator, wherein the reflector directs deviating neutrons back to the moderator to enhance intensity of an epithermal neutron beam,
• a thermal neutron absorber provided to absorb thermal neutrons to avoid overdosing in superficial normal tissues during treatment,
• a radiation shield provided to shield leaking neutrons and photons so as to reduce dose to normal tissues in a non-irradiation area, and
• a beam exit, wherein the radiation shield around the beam exit is disposed at the rear of the reflector;
• a concrete wall accommodating the neutron generating device and the beam shaping assembly;
• and
• a reinforcing portion at least partially disposed in the concrete wall;
• wherein the concrete wall and the reinforcing portion are provided to support the beam shaping assembly, and more than 90% of weight of a material of the reinforcing portion is composed of at least one element of C, H, O, N, Si, Al, Mg, Li, B, Mn, Cu, Zn, S, Ca, and Ti.