Radiotherapy system

A radiotherapy system, comprising a pull rod device, radiotherapy equipment and at least one source storage tank, wherein

• the pull rod device includes a pull rod and a first connection portion disposed on the pull rod;
• the pull rod extends into the source storage tank and drives the first connection portion to move in the source storage tank;
• the radiotherapy equipment includes a fixed support, a treatment head and a radioactive source component,
• wherein the source storage tank is disposed on the fixed support, and then attached tightly to the radiotherapy equipment;
• the treatment head includes a first opening and an accommodation space, and the radioactive source component is located in the accommodation space of the treatment head;
• and
• the radioactive source component includes a radioactive source, a source carrier body and a second connection portion;
• a connecting mode of the first connection portion and the second connection portion is threaded connection;
• the source carrier body is formed of lead, tungsten or a tungsten alloy;
• the source storage tank includes a tank body and a tank cover, the tank body includes a second opening and an accommodation space capable of accommodating the radioactive source component, and the tank cover is configured to close the second opening;
• and
• the second opening of the source storage tank is configured to connect to the first opening of the radiotherapy equipment, and the radioactive source component is able to move between the treatment head and the source storage tank.