Patent Number: 
Section: claims

1. A particle therapy system comprising:a building having a first floor and a second floor;a particle beam generator installed on the first floor, the particle beam generator being configured to generate a particle beam;a first transport system configured to transport a particle beam from the particle beam generator to a first irradiation system in a first treatment room; anda second transport system configured to transport a particle beam branched from the first transport system, via the second floor, to a second irradiation system in a second treatment room,wherein the second transport system has a first bending magnet configured to bend a particle beam to a direction of the second floor, the second floor having a surface that is at a different height from an installation surface of the particle beam generator,wherein the building has a shielding wall shielding the first floor and the second floor,wherein the second transport system penetrates the shielding wall on a rear side of the first bending magnet in a traveling direction of a particle beam,wherein a gate valve is provided on a rear side of the shielding wall on the traveling direction of the particle beam in a midway point of the second transport system,wherein the second transport system is blocked by the gate valve,wherein the second transport system is connected, at a predetermined timing, to the second irradiation system in the second treatment room,wherein the gate valve is opened after an inside of the second transport system is maintained at a vacuum, andwherein at least a portion of the shielding wall is removed at a predetermined time of expanding the first treatment room by adding the second treatment room. 2. The particle therapy system according to claim 1,wherein the shielding wall is erected on the second floor so as to separate the first floor from the second floor. 3. The particle therapy system according to claim 1,wherein the shielding wall is provided in parallel with the second floor so as to separate the first floor from the second floor. 4. The particle therapy system according to claim 1,wherein the first transport system is connected to the first irradiation system. 5. The particle therapy system according to claim 1,wherein the second floor includes at least any one of a vertical direction floor configured to apply a particle beam to the second treatment room from a vertical direction and a skew direction floor configured to apply a particle beam to the second treatment room from a skew direction inclined at a predetermined angle from the vertical direction. 6. A particle therapy system comprising:a building having a first floor and a second floor;a particle beam generator installed on the first floor, the particle beam generator being configured to generate a particle beam;a first transport system configured to transport a particle beam from the particle beam generator to a first irradiation system in a first treatment room; anda second transport system configured to transport a particle beam branched from the first transport system, via the second floor, to a second irradiation system in a second treatment room,wherein the second transport system has a first bending magnet configured to bend a particle beam to a direction of the second floor, the second floor having a surface that is at a different height from an installation surface of the particle beam generator,wherein the building has a shielding wall shielding the first floor and the second floor,wherein the second transport system penetrates the shielding wall on a rear side of the first bending magnet in a traveling direction of a particle beam,wherein at least a portion of the shielding wall is removed at a predetermined time of expanding the first treatment room by adding the second treatment room,wherein the second floor includes at least any one of a vertical direction floor configured to apply a particle beam to the second treatment room from a vertical direction and a skew direction floor configured to apply a particle beam to the second treatment room from a skew direction inclined at a predetermined angle from the vertical direction,wherein the second floor includes the vertical direction floor and the skew direction floor, andwherein the shielding wall is erected on the vertical direction floor and on the skew direction floor so as to separate the first floor from the vertical direction floor and the skew direction floor. 7. The particle therapy system according to claim 6,wherein the vertical direction floor is located on an upper side of the skew direction floor, andwherein the shielding wall is provided in parallel with the skew direction floor as located between the skew direction floor and the first floor so as to separate the first floor from the vertical direction floor and the skew direction floor. 8. The particle therapy system according to claim 7,wherein, on the vertical direction floor, a vertical direction irradiation system configured to apply a particle beam from the vertical direction is provided as one part of the second irradiation system,wherein, on the skew direction floor, a skew direction irradiation system configured to apply a particle beam from the skew direction is provided as another part of the second irradiation system;wherein the first irradiation system applies a first particle beam generated at the particle beam generator, andwherein the vertical direction irradiation system and the skew direction irradiation system apply a second particle beam generated at the particle beam generator. 9. The particle therapy system according to claim 8, further comprisinga horizontal direction irradiation system configured to apply a particle beam from a horizontal direction. 10. A method of extending a particle therapy system, the method comprising the steps of:providing a building having a first floor and a second floor;providing a particle beam generator installed on the first floor, the particle beam generator being configured to generate a particle beam;providing a first transport system configured to transport a particle beam from the particle beam generator to a first irradiation system in a first treatment room;providing a second transport system configured to transport a particle beam to a second irradiation system in a second treatment room, the second transport system being branched from the first transport system, via the second floor;providing, on the second transport system, a first bending magnet configured to bend a particle beam in a direction of the second floor, the second floor having a surface that is at a different height from an installation surface of the particle beam generator;providing, on the building, a shielding wall configured to shield a space in which the particle beam generator is present on a floor different from the first floor;disposing the second transport system so as to penetrate the shielding wall on a rear side of the first bending magnet in a traveling direction of a particle beam;providing, in a midway point of the second transport system, a gate valve on a rear side of the shielding wall on the traveling direction of the particle beam;blocking the second transport system by the gate valve;connecting, at a predetermined timing, the second transport system to the second irradiation system in the second treatment room;opening the gate valve after an inside of the second transport system is maintained at a vacuum; andremoving at least a part of the shielding wall.