Boron neutron capture therapy (BNCT) system comprising a target current monitoring device

A target current monitoring device for a boron neutron capture therapy system, comprising:

• a beam shaping body;
• a proton channel;
• a target part disposed inside the proton channel of the beam shaping body,
• wherein the target part is replaceable, and
• an automatic conduction detection device independent of the target part, the automatic conduction detection device comprises a contact part and an external current monitoring apparatus electrically connected with the contact part, the contact part is disposed on a moving path of the target part, and the contact part forms a circuit with the external current monitoring apparatus after being in contact with the target part;
• the automatic conduction detection device further comprises a line and a telescopic assembly configured to drive the contact part to extend and contract, and the telescopic assembly is disposed inside the proton channel or disposed inside the beam shaping body;
• the telescopic assembly is a conductor, and when the contact part is in contact with the target part, the contact part, the target part, the telescopic assembly, and the external current monitoring apparatus form the circuit;
• or
• the telescopic assembly is an insulator, the contact part is in communication with the external current monitoring apparatus through the line, and when the contact part is in contact with the target part, the contact part, the target part, the line, and the external current monitoring apparatus form the circuit.