A particle accelerator treatment system

Abstract

The application is a particle accelerator treatment system, which comprises two rectangular vertical plates with semicircular openings on the front ends, a beam guiding system clamped between the two rectangular vertical plates, deflection magnets of the beam guiding system consistent with the semicircular openings of the rectangular vertical plates, a beam distribution system with a ring-shaped support swing mechanism, an image-guided real-time positioning system, a ring-shaped frame of the image-guided real-time positioning system extending from both sides of a trapezoidal shell of the beam distribution system to form a ring, and a treatment bed with a bed board extending into the ring-shaped frame of the image-guided real-time positioning system, so that a patient lying on the bed board under the guidance of the image-guided real-time positioning system can receive beam radiation treatment output by the beam distribution system.

Description

Technical Field

[0001] This invention relates to a particle accelerator therapy system. Background Technology

[0002] Particle accelerator therapy utilizes the principle of electromagnetic acceleration to accelerate charged particles, which then bombard a heavy metal target to produce resilient radiation. This provides a suitable X-ray or E-ray beam for clinical radiotherapy. X-rays or E-rays have a destructive and proliferative inhibitory effect on tumor cells, so "radiotherapy" achieves its therapeutic purpose in this way. Summary of the Invention

[0003] The purpose of this invention is to provide a particle accelerator therapy system.

[0004] The technical solution adopted by this invention to achieve its technical objective is as follows: a particle accelerator therapy system, comprising: two rectangular upright plates with semi-circular openings at their front ends, arranged opposite each other; a beam guiding system sandwiched between the two rectangular upright plates; the deflection magnets of the beam guiding system align with the semi-circular openings of the rectangular upright plates; a beam delivery system with a ring-shaped support swing mechanism, wherein the two ring-shaped supports of the ring-shaped support swing mechanism are respectively installed in the semi-circular openings of the two rectangular upright plates; the trapezoidal outer shell of the beam delivery system extends from both ends and is suspended on the two ring-shaped supports, and the trapezoidal outer shell of the beam delivery system is suspended in the semi-circular openings of the deflection magnets; an image-guided real-time positioning system; the annular frame of the image-guided real-time positioning system extends from both sides of the trapezoidal outer shell of the beam delivery system to form a ring; a treatment bed, wherein the bed board of the treatment bed extends into the annular frame of the image-guided real-time positioning system, and a patient lying on the bed board under the guidance of the image-guided real-time positioning system receives beam radiation therapy output by the beam delivery system.

[0005] Furthermore, in the aforementioned particle accelerator therapy system: the beam guiding system includes three sets of deflecting magnets—A, B, and C—through which the beam passes sequentially, and a focusing system positioned between deflecting magnets A and B; the two magnetic poles A of deflecting magnet A are rectangular, with their opposing surfaces forming vertical planes, and its yoke A is connected to the inner surfaces of two rectangular upright plates; the focusing system includes a set of quadrupole magnets with coincident axis lines, the quadrupole magnets being mounted on the upper surface of a U-shaped frame A horizontal plate, the two surfaces of the U-shaped frame A and the outer surfaces of the upright arms being connected to the outer rings of the rotation axes X, which intersect perpendicularly with the axis lines of the quadrupole magnets; the inner rings of the two rotation axes X are connected to the inner surfaces of two rectangular sliding plates; the two rectangular sliding plates can slide vertically; the deflecting magnet B has a symmetrical structure, and the sidewalls of its yoke B are connected to the inner surfaces of the two rectangular upright plates; the deflecting magnet C is located inside the deflecting magnet B.

[0006] Furthermore, in the aforementioned particle accelerator therapy system: the beam delivery system oscillation mechanism includes two annular guide rail seats whose outer arc surfaces are respectively connected to the inner arc surfaces of the semi-circular openings of two rectangular vertical plates. The arc-shaped guide rails are movably connected to two sets of two sliders each, and the two sliders in each set are respectively connected to the outer surfaces of the two support arms of a U-shaped frame B. The inner arc surfaces of the two annular guide rail seats are machined with arc-shaped racks, and the two arc-shaped racks are movably connected to two gears whose centerlines are parallel to the X-axis. The two gears are movably connected to two rotating mechanisms mounted on the lower surface of the horizontal plate of the U-shaped frame B. The two rotating mechanisms are movably connected to a wheeled linkage mechanism installed on the lower rear end of the U-shaped frame B horizontal plate. The lower surface of the deflecting magnet C and the yoke C in the beam guiding system are connected to the upper surface of the U-shaped frame B horizontal plate. The lower surface of the U-shaped frame B horizontal plate is connected to the upper end face of the trapezoidal vertical plate. The inclined surfaces at both ends of the two trapezoidal vertical plates are respectively connected to the inclined plates. The lower end faces of the two trapezoidal vertical plates and the two inclined plates are connected to the rectangular base plate. The U-shaped frame B, the two trapezoidal vertical plates, the two inclined plates and the rectangular base plate constitute the installation frame of the trapezoidal beam delivery system.

[0007] Furthermore, in the aforementioned particle accelerator therapy system: the beam delivery system is a scanning beam delivery system, installed above and inside the mounting frame. When the mounting frame is in its initial position, the scanning beam delivery system includes, in sequence, a deflecting magnet C, a deflecting magnet D, a scattering device, an energy continuous modulator A, a switchable and swingable collimator device, and a collimator B. The deflecting magnet C is a shared component of the beam guidance system and the scanning beam delivery system, and together with the deflecting magnet D, it constitutes the bidirectional scanning magnet of the scanning beam delivery system; The scattering device includes a rectangular dispersive plate, which is embedded in the rectangular countersunk hole of an elongated mounting base with rectangular countersunk holes and rectangular through holes. The two ends of the elongated mounting base are connected to the inner surfaces of two trapezoidal uprights in the beam delivery system mounting frame. The energy continuous modulator A includes a group of n spaced-apart movable wedge absorbers and a fixed wedge absorber placed below them. The lower surfaces of the n movable wedge absorbers are horizontal and the upper surfaces are inclined. The lower surface of the fixed wedge absorber is horizontal and the upper surface is inclined.

[0008] Furthermore, in the aforementioned particle accelerator therapy system: the beam delivery system is an expanded beam delivery system, installed inside the mounting frame, including a first scatterer system, a second scatterer system, an energy continuous modulator B, a wedge-shaped absorber system, a collimator C, and a liftable multi-leaf collimator; the first scatterer system includes a set of movable, circularly spaced, thin-plate-shaped first scatterers of varying thicknesses; the second scatterer system includes second scatterers that can move forward, backward, left, and right; the energy continuous modulator B is connected to the inner surfaces of two trapezoidal vertical plates; the wedge-shaped absorber system includes m wedge-shaped absorbers C that can move left and right; the collimator C has trapezoidal through holes, and its projection on the horizontal plane under point light source illumination is the maximum field of the beam delivery system; the liftable multi-leaf collimator includes left and right double-layer multi-leaf collimators, which are connected to a vertical lifting mechanism, and the lifting mechanism is connected to the outer surfaces of the two trapezoidal vertical plates.

[0009] Furthermore, in the aforementioned particle accelerator therapy system: the image-guided real-time positioning system includes a ring-shaped mounting frame; the center of the ring-shaped mounting frame forms the isocenter of the treatment; the particle accelerator beam delivery system is mounted on the ring-shaped mounting frame, and the beam directly reaches the isocenter; it also includes a pair of X-ray generators and a pair of X-ray flat panel detectors mounted on the ring-shaped mounting frame, wherein the X-rays emitted by the X-ray generators pass through the isocenter and then irradiate the opposite X-ray flat panel detectors.

[0010] Furthermore, in the aforementioned particle accelerator therapy system: the treatment bed is a five-axis treatment bed composed of two rotary axes and three linear axes, including a bed board. The bed board is connected to the outer ring of the rotary axis ZA below it. The inner ring of the rotary axis ZA is connected to one end of a swing arm, and the other end of the swing arm is movably connected to the linear mechanism ZB. The lower surface of the circular base of the linear mechanism ZB is connected to the outer ring of the rotary axis ZB, whose axis is parallel to the Z-axis. The inner ring of the rotary axis ZB is fixed within a frame that can move forward, backward, left, and right.

[0011] This invention provides a complete particle accelerator therapy system, which is convenient for doctors to use in diagnosis and treatment.

[0012] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0013] Figure 1 1. Overall structural diagram of the particle accelerator therapy system of the present invention;

[0014] Figure 2 Overall structural diagram of the beam guidance system;

[0015] Figure 3 One of the exploded diagrams of the beam guidance system structure;

[0016] Figure 4 Part 2: Exploded view of the beam guidance system structure;

[0017] Figure 5 Part 3 of the exploded view of the beam guidance system structure;

[0018] Figure 6 Part 4 of the exploded view of the beam guidance system structure;

[0019] Figure 7 Part 5 of the exploded view of the beam guidance system structure;

[0020] Figure 8 Schematic diagram of the beam guidance system;

[0021] Figure 9 One of the structural diagrams of the swing mechanism of the beam delivery system;

[0022] Figure 10 Part Two of the structural diagrams for the swing mechanism of the beam delivery system;

[0023] Figure 11 Overall structural diagram of a scanning beam delivery system;

[0024] Figure 12 One of the exploded views of a scanning beam delivery system;

[0025] Figure 13 1. Exploded view of a scanning beam delivery system (Part 2)

[0026] Figure 14 3. Exploded view of a scanning beam delivery system;

[0027] Figure 15 Exploded view of a scanning beam delivery system, part four;

[0028] Figure 16 Schematic diagram of a continuous energy modulator;

[0029] Figure 17 Exploded view of a scanning beam delivery system, part five;

[0030] Figure 18 Exploded view of a scanning beam delivery system, part six;

[0031] Figure 19 1. Overall structural diagram of a beam expansion type beam delivery system;

[0032] Figure 20 One of the exploded diagrams of a beam-expanding beam delivery system;

[0033] Figure 21 Part 2 of the exploded view of the beam delivery system;

[0034] Figure 22 Part 3 of the exploded view of the beam delivery system;

[0035] Figure 23 Part 4 of the exploded view of the beam delivery system;

[0036] Figure 24 Part 5 of the exploded view of the beam delivery system;

[0037] Figure 25 Exploded diagram of a beam delivery system, part six;

[0038] Figure 26 Image-guided real-time positioning system structure diagram;

[0039] Figure 27 Image-guided real-time positioning system appearance diagram;

[0040] Figure 28 Treatment bed structure diagram;

[0041] Figure 29 1. Position diagram of magnetic slide A, rectangular board and magnetic slide B;

[0042] Figure 30 One of the functional diagrams of a treatment bed;

[0043] Figure 31 The second functional diagram of the treatment bed;

[0044] Symbols in the image:

[0045] 1. Rectangular base; 2. Rectangular upright plate;

[0046] 3. Beam guidance system;

[0047] 3-1, Deflecting magnet A; 3-1-1, Magnetic pole A; 3-1-2, Magnetic yoke A;

[0048] 3-2. Clustering system; 3-2-1. Quadruple magnet; 3-2-2. U-shaped frame A; 3-2-3. Rotary shaft X; 3-2-4. Rectangular slide plate; 3-2-5. Linear mechanism ZA;

[0049] 3-3, Deflecting magnet B; 3-3-1, Magnetic pole B; 3-3-2, Magnetic yoke B;

[0050] 3-4. Deflecting magnet C; 3-4-1. Magnetic pole C; 3-4-2. Magnetic yoke C;

[0051] 4. Beam delivery system oscillation mechanism;

[0052] 4-1. Circular guide rail seat; 4-2. Arc-shaped guide rail; 4-3. Slider;

[0053] 4-4. Installation frame; 4-4-1. U-shaped frame B; 4-2-2. Trapezoidal upright plate; 4-2-3. Inclined plate; 4-4-4. Base plate; 4-5. Gear; 4-6. Rotating mechanism; 4-7. Wheeled linkage mechanism;

[0054] 5. Beam delivery system;

[0055] 5-1. Scanning beam delivery system; 5-1-1. Deflecting magnet D; 5-1-1-1. Magnetic pole D; 5-1-1-2. Magnetic yoke D; 5-1-2. Scattering device; 5-1-2-1. Rectangular dispersive sheet; 5-1-2-2. Long mounting base.

[0056] 5-1-3, Energy Continuous Modulator A; 5-1-3-1, Movable Wedge Absorber; 5-1-3-1-1, Linear Mechanism XA; 5-1-3-2, Fixed Wedge Absorber; 5-1-3-2-1, Mounting Base; 5-1-3-3, Virtual Wedge Absorber; 5-1-4, Collimator Device; 5-1-4-1, Collimator A; 5-1-4-2, Linear Mechanism XB; 5-1-4-3, Rectangular Frame A; 5-1-4-4, Arc-Shaped Swing Mechanism A; 5-1-4-5, Rectangular Frame B; 5-1-4-6, Arc-Shaped Swing Mechanism B; 5-1-5, Collimator B; 5-2, Beam Expander Beam Delivery System, 5-2-1, First scatterer system, 5-2-1-1, First scatterer, 5-2-1-2, Linear mechanism YA, 5-2-2, Second scatterer system, 5-2-2-1, Second scatterer, 5-2-2-2, Bidirectional moving platform, 5-2-3, Energy continuous modulator B, 5-2-4, Wedge absorber system, 5-2-4-1, Wedge absorber C, 5-2-4-2, Spin mechanism, 5-2-4-3, Linear mechanism YB, 5-2-5, Collimator C, 5-2-6, Liftable multi-leaf collimator, 5-2-6-1, Double-layer multi-leaf collimator, 5-2-6-2, Lifting mechanism;

[0057] 6. Circular image-guided real-time positioning system; 6-1. Hollow circular frame; 6-2. X-ray generator; 6-3. X-ray flat panel detector; 6-4. Collimator D;

[0058] 7. Treatment bed; 7-1. Bed board; 7-2. Rotary shaft ZA; 7-3. Swing arm; 7-4. Linear mechanism ZB; 7-5. Rotary shaft ZB; 7-6. Magnetic slide plate A; 7-7. Rectangular plate; 7-8. Magnetic slide plate B; 7-9. Linear mechanism YC; 7-10. Linear mechanism XC; 7-11. Guide rail seat; 7-12. Rectangular frame; 7-13. Rectangular base.

[0059] 101. Isocenter; 102. Point source; 103. Maximum field of view; 104. Rhomboid beam.

[0060] 1001. Beam A segment, 1002. Beam B segment, 1003. Beam C segment, 1004. Beam D segment, 1005. Beam E segment, 1006. Beam F segment, 1007. Beam G segment. Detailed Implementation

[0061] The following description uses an XYZ coordinate system, which is a rectangular coordinate system with the treatment isocenter 101 as the origin and the Z-axis as the vertical axis.

[0062] Example 1, this example is as follows Figure 1 As shown, it is a particle accelerator therapy system including a rectangular base 1, on which two rectangular plates 2 with semi-circular openings centered on the X-axis are connected to its upper surface. The inner surfaces of the two rectangular plates 2 are parallel to the YZ plane and are in a mirror-symmetrical position relative to the YZ plane. The direction of the rectangular base 1 and the rectangular plates 2 is defined as the opposite direction of the Y-axis, with the XZ plane as the reference. A beam guiding system 3 is installed above the rectangular base 1 and inside the two rectangular plates 2. A beam delivery system swing mechanism 4 is installed in the semi-circular opening of the rectangular plates 2. The swing mechanism 4 is connected to a beam delivery system 5 with a trapezoidal outer shell. The two inclined surfaces of the beam delivery system 5 with the trapezoidal shell in the Y-axis direction are connected to a ring-shaped image-guided real-time positioning system 6 with the inner ring axis coinciding with the X-axis. A treatment bed 7 is installed on the side of the ring-shaped image-guided real-time positioning system 6 along the positive Y-axis direction.

[0063] Beam guidance system 3 Figure 2 As shown, it includes a deflecting magnet A3-1, a focusing system 3-2, a deflecting magnet B3-3, and a deflecting magnet C3-4 arranged sequentially from far to near along the Y-axis relative to the isocenter 101. Figure 2 As shown, the rectangular vertical plate 2 on the left side is hidden in order to show the beam guidance system 3.

[0064] like Figure 3 As shown, the deflecting magnet A3-1 has its geometric center coinciding with the Y-axis when viewed from the Y-axis direction. Its two magnetic poles A3-1-1 are rectangular, with their opposing surfaces parallel to the YZ plane and mirror-symmetrical with respect to the YZ plane. The sidewall of its yoke A3-1-2, perpendicular to the X-axis, is connected to the inner surfaces of the two rectangular vertical plates 2. Figure 3 As shown, to see the two magnetic poles A3-1-1, the two excitation coils wound around the two magnetic poles A3-1-1 were moved upward by a distance.

[0065] Clustering system 3-2 as shown Figure 4As shown, the system includes a set of quadrupole magnets 3-2-1 whose centerlines coincide with the YZ plane. The quadrupole magnets 3-2-1 are mounted on the upper surface of a U-shaped frame A3-2-2 horizontal plate. The outer surfaces of the two vertical arms of the U-shaped frame A3-2-2, whose surfaces are perpendicular to the X-axis, are respectively connected to the outer rings of two coaxial rotary shafts X3-2-3 whose centerlines are parallel to the X-axis and perpendicular to the centerlines of the quadrupole magnets 3-2-1. The inner rings of the two rotary shafts X3-2-3 are respectively connected to the inner surfaces of two rectangular sliding plates 3-2-4. The two rectangular sliding plates 3-2-4 are movably connected to a Z-axis linear mechanism ZA3-2-5. The Z-axis linear mechanism ZA3-2-5 is respectively connected to the inner surfaces of two rectangular vertical plates 2. The Z-axis linear mechanism ZA3-2-5 provides the guide rail and power for the sliding plates to move along the Z-axis direction, and it is controlled by the system's computer system.

[0066] Here, the rotary shaft consists of an inner ring and an outer ring, which move separately along the axial direction and are connected by ball bearings.

[0067] A linear mechanism includes a linear movement mechanism in the same direction and a linear drive mechanism. The linear movement mechanism includes a linear guide and a slider, while the linear drive mechanism includes a lead screw, nut, bearing, bearing housing, pulley mechanism, and motor, etc. For simplicity, these are combined into one linear mechanism. The same applies below.

[0068] Driven by the rotary drive mechanism of the rotary shaft X3-2-3 and the linear drive mechanism of the linear mechanism ZA, the U-shaped frame A3-2-2, together with a set of quadrupole magnets 3-2-1 mounted on it, can move up and down along the Z-axis and rotate around the axis of the rotary shaft X3-2-3.

[0069] Deflecting magnet B3-3, etc. Figure 5 As shown, it has a symmetrical structure and is mirror-symmetrical with respect to the XY plane. The opposing surfaces of the two magnetic poles B3-3-1 of the two deflecting magnets are parallel to the YZ plane and are mirror-symmetrical with respect to the YZ plane. The sidewall of the yoke B3-3-2 of the deflecting magnet B3-3, which is perpendicular to the X-axis, is connected to the inner surfaces of the two rectangular plates 2.

[0070] To see the magnetic pole B3-3-1, the yoke 3-3-2 of the upper deflecting magnet B3-3 was moved back a distance.

[0071] like Figure 6As shown, to clearly see the detailed structure of magnetic pole B3-3-1, the excitation coil winding on the back side of magnetic pole B3-3-1 was removed. The boundary of the winding does not coincide with the boundary of magnetic pole B3-3-1 at all. Viewed from the X-axis, the edges of the upper two magnetic poles B3-3-1 facing forward of the Y-axis are arc-shaped with the isocenter 101 as the center, while the edges facing backward of the Y-axis are irregular curves, with the upper edge being an arc shape.

[0072] like Figure 7 As shown, to see the two magnetic poles C3-4-1, the two excitation coils wound around them are moved forward a distance. The deflecting magnet C3-4 is placed inside the arc-shaped edge facing forward of the magnetic pole B3-3-1 of the deflecting magnet B3-3, and can swing along the arc-shaped edge facing forward of the magnetic pole B3-3-1 with the X-axis as the axis. Its two magnetic poles C3-4-1 are rectangular, and their opposite surfaces are parallel to the YZ plane and mirror-symmetrical with respect to the YZ plane.

[0073] like Figure 8 The diagram shows the rectification and guidance path. The beam guided by the beam guidance system 3 is divided into seven segments: beam segment A (1001) entering magnetic pole A3-1-1, beam segment B (1002) deflected by magnetic pole A3-1-1, beam segment C (1003) exiting magnetic pole A, beam segment D (1004) deflected by magnetic pole B3-3-1, beam segment E (1005) exiting magnetic pole B3-3-1, and beam segment F (100) deflected by magnetic pole C3-4-1. 6. Regarding the beam segment G 1007 emitted from magnetic pole C3-4-1, due to the irregular curve design of the front edge of magnetic pole B3-3-1 in this embodiment, it is not guaranteed that the axis of the beam segment E 1005 emitted from magnetic pole B3-3-1 intersects with the isocenter 101. Therefore, the deflecting magnet C3-4 is responsible for the final calibration to ensure that the axis of the beam segment G 1007 emitted from magnetic pole C3-4-1 intersects with the isocenter 101. Figure 6 As shown, the irregular curved shape behind magnetic pole B3-3-1 consists of upper and lower straight lines and a middle curve. The middle curve is designed according to theoretical values, while the upper and lower straight lines deviate slightly from theoretical values. Even if the middle curve is designed according to theoretical values, due to manufacturing errors, it cannot be completely guaranteed that the axis of the beam E segment 1005 emitted from magnetic pole B intersects with the isocenter 101. Therefore, the design of magnetic pole B3-3-1 considers both theoretical values ​​and ease of manufacturing and functionality. According to this embodiment, the deflecting magnet C3-4 can be deflected ±90° backward along the Y-axis with the X-axis as the axis and the XY plane as the reference.

[0074] Before entering magnetic pole A, beam segment A 1001 undergoes repeated focusing in the beam transport section to ensure good emissivity. Considering the long travel distance of beam segment C 1003 exiting magnetic pole A3-1-1, its emissivity may change. Therefore, a quadrupole magnet 3-2-1 is added to refocus beam segment C 1003. To refocus, the quadrupole magnet 3-2-1, driven by the rotation drive mechanism of the gyroscopic shaft X3-2-3 and the linear mechanism ZA3-2-5 in the Z-axis direction, can make its axis coincide with the axis of beam segment C 1003. To determine whether the axis coincides and to detect changes in emissivity, a detection device is also required.

[0075] Beam delivery system oscillating mechanism 4, such as Figure 9 As shown, the system includes two annular guide rail seats 4-1. The outer arc surfaces of the two annular guide rail seats 4-1 are connected to the inner arc surfaces of the semi-circular openings of the rectangular vertical plate 2. The inner surfaces of the annular guide rail seats 4-1, which are parallel to the YZ plane and mirror-symmetrical with respect to the YZ plane, are connected to two arc-shaped guide rails 4-2 whose arc centers coincide with the X-axis. Two sliders 4-3 are respectively installed on each arc-shaped guide rail 4-2. These two sliders 4-3 are connected to the outer surfaces of the two support arms of a U-shaped frame B4-4-1. The inner arc surfaces of the two annular guide rail seats 4-1 are machined with arc-shaped racks. The two arc-shaped racks are respectively meshed with two gears 4-5 whose axis is parallel to the X-axis. These two gears 4-5 are respectively movably connected to two rotating mechanisms 4-6 installed on the lower surface of the horizontal plate of the U-shaped frame B4-1-1. The two rotating mechanisms 4-6 are movably connected to a wheeled linkage mechanism 4-7 installed on the lower surface of the rear end of the horizontal plate of the U-shaped frame B4-1-1. The rotating mechanism 4-6 can drive the pulley-type linkage mechanism 4-7 to slide along the arc-shaped guide rail seat 4-1 of the swing mechanism 4.

[0076] like Figure 9 As shown, to see the rotating mechanism 4-6 and the pulley linkage mechanism 4-7, the right-side annular guide rail seat 4-1 is moved to the right by a distance along the X-axis.

[0077] The beam guidance system 3, with its wheeled linkage mechanism 4-7, slides along the arc-shaped guide rail seat 4-1 of the swing mechanism 4. For example... Figure 10The diagram shows a three-dimensional view of the beam guiding system 3. The lower surface of the yoke C3-4-2 of the deflecting magnet C3-4 is connected to the upper surface of the horizontal plate of the U-shaped frame B4-4-1. The lower surface of the horizontal plate of the U-shaped frame B4-4-1 is connected to the upper end faces of two trapezoidal vertical plates 4-4-2, whose inner surfaces are parallel to the YZ plane and mirror-symmetrical with respect to the YZ plane. The inclined surfaces at both ends of the two trapezoidal vertical plates 4-4-2 are connected to two inclined plates 4-2-3, whose surfaces are parallel to the X-axis. The lower end faces of the two trapezoidal vertical plates 4-4-2 and the two inclined plates 4-4-3 are connected to a rectangular base plate 4-4-4, whose surface is perpendicular to the Z-axis. The U-shaped frame B4-4-1, the two trapezoidal vertical plates 4-4-2, and the two inclined plates... A trapezoidal beam delivery system mounting frame 4-4 is formed by a rectangular base plate 4-4-3 and a rectangular base plate 4-4-4. In practice, the mounting frame 4-4 is defined as being in its initial position when the horizontal plate of the U-shaped frame B4-4-1 is horizontal and its upper surface is facing upward. The point light source 102 is defined as the intersection of the plane containing the upper surface of the deflection magnet C3-4 pole C3-4-1 and the Z-axis when the mounting frame 4-4 is in its initial position. When the mounting frame 4-4 is in its initial position, the geometric center of the mounting frame 4-4 and the deflection magnet C3-4 coincides with the Z-axis when viewed from the Z-axis direction. When the mounting frame 4-4 swings backward along the Y-axis with the X-axis as the axis, driven by the swing mechanism 4, the point light source 102 also swings accordingly.

[0078] Setting the initial position of the installation frame 4-4 is to avoid setting up a rectangular coordinate system xyz that swings relative to the XYZ rectangular coordinate system with the X-axis as the axis.

[0079] like Figure 11 The image shows a front view of the beam delivery system 5. In this embodiment, the beam delivery system 5 is a scanning beam delivery system 5-1, which is installed above and inside the mounting frame 4-4. When the mounting frame 4-4 is in its initial position, the scanning beam delivery system 5-1 has the following components arranged in sequence from far to near along the Z-axis relative to the isocenter 101: a deflecting magnet C3-4, a deflecting magnet D5-1-1, a scattering device 5-1-2, an energy continuous modulator A5-1-3, a switchable and swingable collimator device 5-1-4, and a collimator B5-1-5.

[0080] To visualize the components of the scanning beam delivery system 5-1, Figure 11 The tilted panel 4-4-3 facing the reader has been omitted.

[0081] like Figure 12As shown, the deflecting magnet C3-4 is a shared component of the beam guiding system 3 and the scanning beam delivery system 5-1. Together with the deflecting magnet D5-1-1, it forms the bidirectional scanning magnet of the scanning beam delivery system 5-1. The two magnetic poles D5-1-1-1 of the deflecting magnet D5-1-1 are rectangular, with their opposing surfaces parallel to the XZ plane and in a mirror-symmetrical position relative to the XZ plane. The upper surface of its yoke D5-1-1-2 is connected to the lower surface of the U-shaped frame B4-4-1. From the Z-axis direction, the geometric center of the deflecting magnet D5-1-1 coincides with the Z-axis.

[0082] To make the deflection magnet D5-1-1 visible, the U-shaped frame B4-4-1 was cut in half; to make the magnetic pole D5-1-1-1 visible, the excitation coil wound around it was moved forward by a distance.

[0083] like Figure 13 As shown, the scattering device 5-1-2 includes a rectangular scattering plate 5-1-2-1, the surface of which is parallel to the XY plane. The rectangular scattering plate 5-1-2-1 is embedded in the rectangular countersunk hole of an elongated mounting base 5-1-2-2 which is machined with a rectangular countersunk hole and a rectangular through hole. The two ends of the elongated mounting base 5-1-2-2 are connected to the inner surfaces of two trapezoidal upright plates 4-4-2 in the beam delivery system mounting frame 4-4. The geometric center of the rectangular through hole of the mounting plate 5-1-2-2 coincides with the Z-axis when viewed from the Z-axis direction.

[0084] like Figure 13 The image shows the scattering device 5-1-2, while the opposing trapezoidal vertical plate 4-4-2 and inclined plate 4-4-3 are hidden.

[0085] like Figure 14 As shown, the energy continuous modulator A5-1-3 includes a group of n movable wedge-shaped absorbers 5-1-3-1 arranged vertically and vertically along the Z-axis, and a fixed wedge-shaped absorber 5-1-3-2 placed below them. Here, the lower surface of the n movable wedge-shaped absorbers 5-1-3-1 is a plane parallel to the XY plane, the upper surface is an inclined plane connected to a plane parallel to the XY plane, and the two sides are parallel to the X-axis. The fixed wedge-shaped absorber 5-1-3-2 has a lower surface parallel to the XY plane, an upper surface is an inclined plane, and the two sides are parallel to the X-axis.

[0086] like Figure 15As shown, multiple movable wedge-shaped absorbers 5-1-3-1 are each movably connected to a linear mechanism XA5-1-3-1-1 in the X-axis direction, which moves linearly (left and right) in the X-direction. The linear mechanism XA5-1-3-1-1 in the X-axis direction is connected to the inner surfaces of two trapezoidal uprights 4-4-2 respectively. The fixed wedge-shaped absorbers 5-1-3-2 are connected to a mounting base 5-1-3-2-1, which is also connected to the inner surfaces of the two trapezoidal uprights 4-4-2.

[0087] like Figure 16 As shown, the movable wedge-shaped absorber 5-1-3-1, which can move along the X-axis, and the fixed wedge-shaped absorber 5-1-3-2 can achieve continuous energy modulation, such as... Figure 16 As shown, its effect is equivalent to a fixed wedge absorber 5-1-3-2 that has been reversed sliding on the long inclined surface of an elongated virtual wedge absorber 5-1-3-3 formed by connecting the upper and lower inclined surfaces of a movable wedge absorber 5-1-3-1. During the sliding process, the thickness between the upper plane of the fixed wedge absorber 5-1-3-2 and the lower plane of the virtual wedge absorber 5-1-3-3 will change continuously, thereby changing the energy of the rays passing through the combined thickness of the two absorbers.

[0088] Collimator device 5-1-4 as shown Figure 17 As shown, it is a switchable and swingable collimator device 5-1-4, including a collimator A5-1-4-1 with two parallel trapezoidal holes along the Z-axis. The collimator A5-1-4-1 is movably connected to a linear mechanism XB5-1-4-2 along the X-axis. The linear mechanism XB5-1-4-2 along the X-axis is connected to the bottom surface of a rectangular frame A5-1-4-3 with an opening at the top and to two vertical surfaces perpendicular to the X-axis. The outer surfaces of the two vertical surfaces of the rectangular frame A5-1-4-3 perpendicular to the Y-axis are connected to an arc-shaped swing mechanism A5-1-4-4. The arc center of the arc-shaped swing mechanism A5-1-4-4 falls on the surface of the two vertical surfaces perpendicular to the Y-axis. The Y-axis is parallel to the straight line parallel to the upper surface of the two magnetic poles D5-1-1-1 and intersecting the Z-axis. The arc-shaped swing mechanism A5-1-4-4 is connected to the inner surfaces of the two vertical surfaces of a rectangular frame B5-1-4-5 with openings at the top and bottom, which are perpendicular to the Y-axis and to the two vertical surfaces perpendicular to the X-axis. The outer surfaces of the two vertical surfaces of the rectangular frame B5-1-4-5 with openings at the top and bottom are connected to an arc-shaped swing mechanism B5-1-4-6. The arc center of the arc-shaped swing mechanism B5-1-4-6 falls on a straight line parallel to the X-axis and passing through the point light source 102. The arc-shaped swing mechanism B5-1-4-6 is connected to the inner surfaces of the two trapezoidal vertical plates 4-4-2.

[0089] like Figure 17The image shows rectangle A5-1-4-3 and related components, while rectangle B5-1-4-5 has been cross-sectionally processed.

[0090] Both the arc-shaped swing mechanism A5-1-4-4 and the arc-shaped swing mechanism B5-1-4-6 described herein include an arc-shaped moving mechanism consisting of an arc-shaped guide rail and a slider, and a linear swing drive mechanism that uses a lever with an outer bearing for pushing and pulling. For simplicity, they are combined into one arc-shaped swing mechanism. The two cuboids seen in the figure are arc-shaped guide rail seats, which are also components of the arc-shaped swing mechanism B5-1-4-6.

[0091] like Figure 18 As shown, the collimator B5-1-5 is connected to the upper surface of the rectangular base plate 4-4-4. The collimator B5-1-5 is machined with a trapezoidal through hole. Its four inner walls are parallel to the X-axis and Y-axis respectively, and parallel to the rays emitted by the point light source 102. Under the illumination of the point light source 102, its projection on the XY plane is the maximum field 103 of the beam delivery system 5. From the Z-axis direction, the geometric center of the trapezoidal through hole of the collimator B5-1-5 coincides with the Z-axis.

[0092] The scanning beam delivery system 5-1 can achieve point-by-point longitudinal scanning irradiation of the Bragg peak by continuously pulling it along the Z-axis.

[0093] like Figure 19 As shown, the beam delivery system 5 is a beam expander beam delivery system 5-2, which is installed inside the mounting frame 4-4. When the mounting frame 4-4 is in the initial position, the beam expander beam delivery system 5-2 has the following components arranged in sequence from far to near along the Z-axis relative to the isocenter 101: a first scatterer system 5-2-1, a second scatterer system 5-2-2, an energy continuous modulator B5-2-3, a wedge absorber system 5-2-4, a collimator C5-2-5, and a liftable multi-leaf collimator 5-2-6.

[0094] To see the relevant components of the beam expander beam delivery system 5-2, Figure 19 In the middle, the tilted plate 4-4-3 facing the reader will be moved to the left by a certain distance.

[0095] In this embodiment, the first scatterer system 5-2-1 within the mounting frame 4-4 is as follows: Figure 20As shown, the first scatterer system 5-2-1 includes a group of multiple (5 or 6 or more, represented by the natural number n) circular thin plate-shaped first scatterers 5-2-1-1 arranged at intervals along the Y-axis with different thicknesses. Here, the n first scatterers 5-2-1-1 are movably connected to a linear mechanism YA5-2-1-2 in the Y-axis direction. The linear mechanism YA5-2-1-2 is connected to the inner surface of the trapezoidal vertical plate 4-4-2 in the distribution system mounting frame 4-4. The centerlines of the n circular first scatterers 5-2-1-1 are parallel to the Z-axis and coincide with the Y-axis.

[0096] The horizontal rectangular plate in the figure is a linear guide seat, which is a component of the linear mechanism YA5-2-1-2.

[0097] Driven by the linear mechanism YA5-2-1-2 in the Y-axis direction, the centerline of a certain first scatterer 5-2-1-1 circular thin plate can coincide with the Z-axis.

[0098] like Figure 21 As shown, the second scatterer system 5-2-2 includes two rows of n / 2 cylindrical second scatterers 5-2-2-1 with curved convex surfaces on their upper surfaces. The two rows of n / 2 second scatterers 5-2-2-1 are movably connected to a bidirectional moving platform 5-2-2-2 in the X-axis and Y-axis directions. The bidirectional moving platform 5-2-2-2 is connected to the inner surface of the trapezoidal vertical plate 4-4-2. The centerlines of the two rows of n / 2 cylindrical second scatterers 5-2-2-1 are parallel to the Z-axis.

[0099] Figure 21 The horizontal rectangular plate in the middle is a linear guide rail seat in the X-axis direction, and is a component of the bidirectional moving platform 5-2-2-2.

[0100] Driven by the bidirectional moving platform 5-2-2-2, the cylindrical axis of a certain second scatterer 5-2-2-1 can coincide with the Z-axis.

[0101] like Figure 22 As shown, the energy continuous modulator B5-2-3 is connected to the inner surfaces of the two trapezoidal uprights 4-4-2. The energy continuous modulator B5-2-3 in the beam expansion system 5-2 has the same structure and working principle as the energy continuous modulator A5-1-3 in the scanning beam delivery system 5-1, and the same installation direction in the mounting frame 4-4.

[0102] like Figure 23As shown, the wedge-shaped absorber system 5-2-4 includes m wedge-shaped absorbers C5-2-4-1. The upper surface of each wedge-shaped absorber C5-2-4-1 is an inclined plane, and the lower surface is a plane parallel to the XY plane. Each of the m wedge-shaped absorbers C5-2-4-1 is movably connected to a spin mechanism 5-2-4-2. Each of the m spin mechanisms 5-2-4-2 is movably connected to a linear mechanism YB5-2-4-3 in the Y-axis direction. The m linear mechanisms YB5-2-4-3 in the Y-axis direction are divided into two groups and connected to the inner surfaces of two trapezoidal vertical plates 4-4-2 respectively. Here, m and n are natural numbers, and their numbers can be the same or different.

[0103] like Figure 24 As shown, the collimator C5-2-5 is connected to the upper surface of the rectangular base plate 4-4-4. The collimator C5-2-5 is machined with a trapezoidal through hole. Its four inner walls are parallel to the X-axis and Y-axis respectively, and parallel to the rays emitted by the point light source 102. Under the illumination of the point light source 102, its projection on the XY plane is the maximum field 103 of the beam delivery system 5. From the Z-axis direction, the geometric center of the trapezoidal through hole of the long collimator C5-2-5 coincides with the Z-axis.

[0104] like Figure 25 As shown, the liftable multi-leaf collimator 5-2-6 includes a double-layer multi-leaf collimator 5-2-6-1 with the blades moving in the X-axis direction. The double-layer multi-leaf collimator 5-2-6-1 is connected to a lifting mechanism 5-2-6-2 in the Z-axis direction. The lifting mechanism 5-2-6-2 is connected to the outer surfaces of two trapezoidal vertical plates 4-4-2.

[0105] The two U-shaped arms shown in the figure are components of the lifting mechanism 5-2-6-2, and they are movably connected to the linear mechanism in the lifting mechanism 5-2-6-2.

[0106] The beam-expanding beam delivery system 5-2 can achieve overall irradiation of the tumor by continuously pulling the Bragg peak along the Z-axis.

[0107] like Figure 26As shown, the image-guided real-time positioning system 6 includes a hollow annular frame 6-1, two X-ray generators 6-2, two X-ray flat panel detectors 6-3, and two collimators D6-4. The annular frame 6-1 has an opening at the top, and the inclined end face of the opening is connected to the outer surface of the two inclined plates 4-4-3 in the distribution system mounting frame 4-4, ensuring that the axis of the inner ring of the annular frame 6-1 coincides with the X-axis. The two X-ray generators 6-2 are placed inside the annular frame 6-1 below the XY plane and are connected to the inner side of the annular frame 6-1 through related components. The two X-ray generators 6-2 are mirror-symmetrical with respect to the XZ plane, and the axis of the beam emitted by their inner point light source coincides with the YZ plane, forms a 45° angle with the XY plane, and intersects with the isocenter 101. The two X-ray flat panels... Detector 6-3 is placed inside the annular frame 6-1 above the XY plane and connected to the inner side of the annular frame 6-1 through related components. The two X-ray flat panel detectors 6-3 are mirror-symmetrical with respect to the XZ plane. Their four sides are parallel to the X-axis and Y-axis, respectively. Their downward-facing flat panel detection surface is at a 45° angle to the XY plane. The line connecting the geometric center and the isocenter of the flat panel detection surface coincides with the YZ plane and is at a 45° angle to the XY plane. The two collimators D6-4 are installed on the outer surface of the inner ring of the annular frame 6-1 below the XY plane, and the axis of the trapezoidal through hole machined on it coincides with the axis of the rays emitted by the point source in the X-ray generator 6-2. The four sides of the trapezoidal hole are parallel to the X-axis and Y-axis, respectively, and are parallel to the rays emitted by the point source in the X-ray generator 6-2. Figure 26 The leftmost one is a ring-shaped closed plate.

[0108] like Figure 27 and Figure 28 As shown, the beams emitted from the two X-ray generators 6-2 are each collimated by collimator D6-4 into rhomboid beams 6-5, which are then projected onto the flat surface of the two X-ray flat panel detectors 6-3. The two X-ray generators 6-2, together with the two X-ray flat panel detectors 6-3 on the opposite side of the XZ plane, form two cross-shaped X-ray machines. During image localization, each machine takes two X-ray images of the part of the body containing the tumor. These images are then registered with the same-angle image (DRR image, also known as a composite X-ray image) generated from the CT scan according to the treatment plan. This determines the deviation between the tumor target center and the isocenter 101. The treatment bed is then moved to align the tumor target center with the isocenter 101, thus achieving image localization. During multi-angle irradiation, since there are no other obstacles besides the treatment bed, images can be taken at any time and registered with the same-angle image (DRR image) of the treatment plan. This allows for re-image localization during treatment to correct deviations caused by body movement. The initial localization and the re-localization during treatment are called image-guided real-time localization. The treatment bed is made of carbon fiber, which absorbs very little X-rays and has virtually no impact on imaging results.

[0109] like Figure 28 As shown, the treatment bed 7 is a five-axis treatment bed consisting of two rotary axes and three linear axes, placed beside the image-guided real-time positioning system 6 in the positive Y-axis direction. It includes a bed board 7-1, which is connected to the outer ring of a rotary axis ZA7-2 whose centerline is parallel to the Z-axis. The inner ring of the rotary axis ZA7-2 is connected to one end of a swing arm 7-3, and the other end of the swing arm 7-3 is movably connected to a linear mechanism ZB7-4 in the Z-axis direction. The lower surface of the circular base of the linear mechanism ZB7-4 in the Z-axis direction is connected to the outer ring of a rotary axis ZB7-5 whose centerline is parallel to the Z-axis. The inner ring of the rotary axis ZB7-5 is connected to a downward-facing magnetic sliding plate A7-6. Connect the magnetic slide A7-6 to the upper surface of a rectangular plate 7-7 whose surface is perpendicular to the Z-axis; connect the lower surface of the rectangular plate 7-7 to an upward-facing magnetic slide B7-8; connect the lower surface of the magnetic slide B7-8 to a linear mechanism YC7-9 in the Y-axis direction; connect the linear mechanism YC7-9 in the Y-axis direction to a linear mechanism XC7-10 in the X-axis direction; connect the linear mechanism XC7-10 in the X-axis direction to a guide rail seat 7-11; connect the lower edge of the rectangular plate 7-7 to a rectangular frame 7-12; connect the lower end faces of the guide rail seat 7-11 and the rectangular frame 7-12 to the upper surface of a rectangular base 7-13.

[0110] like Figure 29 As shown, magnetic slide A7-6 faces downwards because its ejector bearing is located below the magnetic slide, while magnetic slide B7-8 faces upwards because its ejector bearing is located above the magnetic slide. Only the ejector bearing in magnetic slides A7-6 and B7-8 contacts the rectangular plate 7-7, thus achieving a movable connection.

[0111] When the magnetic sliding plate B7-8 moves under the drive of the linear mechanisms YC7-9 in the Y-axis direction and XC7-10 in the X-axis direction, it drives the magnetic sliding plate A7- to move in the same direction and with the same amplitude via magnetic force. The rectangular plate 7-7 covers the linear mechanisms YC7-9 in the Y-axis direction and XC7-10 in the X-axis direction, making the treatment bed 7 appear very simple from the outside. The rectangular plate 7-7 has a certain thickness, thus providing a certain level of strength, allowing medical staff to walk on it and facilitating patient positioning.

[0112] like Figure 28 , Figure 30 and Figure 31 As shown, the treatment bed 7 can drive the bed board 7-1 to penetrate into the hollow ring frame 6-1 of the image-guided real-time positioning system 6 from two directions along the X-axis. When the ring frame 6-1 swings along the Y-axis with the X-axis as the axis, the tumor can be irradiated from both sides of the human body in stages, achieving 360° coplanar irradiation.

[0113] like Figure 31 As shown, the treatment bed 7 can drive the long side of the treatment bed 7-1 to form a certain angle with the X-axis to achieve non-coplanar irradiation.

Claims

1. A particle accelerator therapy system, characterized in that: include: Two rectangular vertical plates with semi-circular openings at the front end are set opposite each other (2); A beam guiding system (3) sandwiched between two rectangular vertical plates (2); the deflection magnet of the beam guiding system (3) is consistent with the semi-circular opening of the rectangular vertical plate (2); A beam delivery system (5) with a ring bracket swing mechanism (4) wherein the two ring brackets of the ring bracket swing mechanism (3) are respectively installed in the semi-circular openings of two rectangular upright plates (2); the trapezoidal shell of the beam delivery system (5) extends out of the two ring brackets and is suspended on the two ring brackets; the trapezoidal shell of the beam delivery system (5) is suspended in the semi-circular opening of the deflection magnet. Image-guided real-time positioning system (6); the annular frame (6-1) of the image-guided real-time positioning system (6) extends from both sides of the trapezoidal shell of the beam delivery system (5) to form a ring; Treatment bed (7), the bed board (7-1) of the treatment bed (7) extends into the annular frame (6-1) of the image-guided real-time positioning system (6), and the patient lying on the bed board (7-1) under the guidance of the image-guided real-time positioning system (6) receives beam radiation therapy output by the beam delivery system (5); The beam guiding system (3) includes three sets of deflecting magnets, namely deflecting magnet A (3-1), deflecting magnet B (3-3) and deflecting magnet C (3-4), through which the beam passes in sequence, and a beam focusing system (3-2) disposed between deflecting magnet A (3-1) and deflecting magnet B (3-3). The two magnetic poles A (3-1-1) of the deflecting magnet A (3-1) are rectangular, with opposite surfaces in a vertical plane, and its yoke A (3-1-2) is connected to the inner surfaces of the two rectangular vertical plates (2); The beam-gathering system (3-2) includes a set of quadrupole magnets (3-2-1) with coincident axis centers. The quadrupole magnets (3-2-1) are mounted on the upper surface of a horizontal plate of a U-shaped frame A (3-2-2). The two surfaces of the U-shaped frame A (3-2-2) and the outer surface of the vertical arm are respectively connected to the outer rings of the two rotating shafts X (3-2-3) that intersect perpendicularly with the axis centers of the quadrupole magnets (3-2-1). The inner rings of the two rotating shafts X (3-2-3) are respectively connected to the inner surfaces of two rectangular sliding plates (3-2-4). The two rectangular sliding plates (3-2-4) can slide vertically. The deflecting magnet B (3-3) has a symmetrical structure, and the sidewall of its magnetic yoke B (3-3-2) is connected to the inner surface of the two rectangular vertical plates (2). The deflecting magnet C (3-4) is placed inside the deflecting magnet B (3-3); The beam delivery system swing mechanism (4) includes two annular guide rail seats (4-1) whose outer arc surfaces are respectively connected to the inner arc surfaces of the semi-circular openings of two rectangular vertical plates (2). The arc-shaped guide rails (4-2) are respectively movably connected to two sets of two sliders (4-3) in each set. The two sliders (4-3) in each set are respectively connected to the outer surfaces of the two support arms of a U-shaped frame B (4-4-1). The inner arc surfaces of the two annular guide rail seats (4-1) are machined with arc-shaped racks. The two arc-shaped racks are respectively movably connected to two gears (4-5) whose axis is parallel to the X-axis. The two gears (4-5) are respectively movably connected to two rotating mechanisms (4-6) installed on the lower surface of the cross plate of the U-shaped frame B (4-1-1). The two rotating mechanisms (4-6) are connected to a rotating mechanism installed on the lower surface of the rear end of the cross plate of the U-shaped frame B (4-1-1). The wheeled linkage mechanism (4-7) is movably connected, and the lower surface of the deflection magnet C (3-4) and yoke C (3-4-2) in the beam guiding system (3) is connected to the upper surface of the cross plate of the U-shaped frame B (4-4-1); the lower surface of the cross plate of the U-shaped frame B (4-4-1) is connected to the upper end face of the trapezoidal vertical plate (4-4-2); the inclined surfaces at both ends of the two trapezoidal vertical plates (4-4-2) are respectively connected to the inclined plate (4-2-3); the lower end faces of the two trapezoidal vertical plates (4-4-2) and the two inclined plates (4-4-3) are connected to the rectangular base plate (4-4-4); the U-shaped frame B (4-4-1), the two trapezoidal vertical plates (4-4-2), the two inclined plates (4-4-3) and the rectangular base plate (4-4-4) form the trapezoidal beam delivery system installation frame (4-4). The beam delivery system (5) is a scanning beam delivery system (5-1), installed above and inside the mounting frame (4-4). When the mounting frame (4-4) is in its initial position, the scanning beam delivery system (5-1) includes a deflecting magnet C (3-4), a deflecting magnet D (5-1-1), a scattering device (5-1-2), an energy continuous modulator A (5-1-3), a switchable and swingable collimator device (5-1-4), and a collimator B (5-1-5) arranged in sequence. The deflecting magnet C (3-4) is a shared component of the beam guiding system (3) and the scanning beam delivery system (5-1), and together with the deflecting magnet D (5-1-1), it forms the bidirectional scanning magnet of the scanning beam delivery system (5-1). The scattering device (5-1-2) includes a A rectangular dispersion plate (5-1-2-1) is embedded in the rectangular countersunk hole of an elongated mounting base (5-1-2-2) which has a rectangular countersunk hole and a rectangular through hole. The two ends of the elongated mounting base (5-1-2-2) are connected to the inner surfaces of two trapezoidal uprights (4-4-2) in the beam delivery system mounting frame (4-4). The energy continuous modulator A (5-1-3) includes a group of n spaced movable wedge absorbers (5-1-3-1) and a fixed wedge absorber (5-1-3-2) placed below them. The lower surface of the n movable wedge absorbers (5-1-3-1) is a horizontal plane and the upper surface is an inclined plane. The lower surface of the fixed wedge absorber (5-1-3-2) is a horizontal plane and the upper surface is an inclined plane. The beam delivery system (5) is an expanded beam delivery system (5-2), which is installed inside the mounting frame (4-4) and includes a first scatterer system (5-2-1), a second scatterer system (5-2-2), an energy continuous modulator B (5-2-3), a wedge-shaped absorber system (5-2-4), a collimator C (5-2-5), and a liftable multi-leaf collimator (5-2-6). The first scatterer system (5-2-1) includes a set of movable, circularly plate-shaped first scatterers (5-2-1-1) arranged at intervals of varying thicknesses. The second scatterer system (5-2-2) includes a second scatterer (5-2-2-1) that can move forward, backward, left, and right. The energy continuous modulator B (5-2-3) is connected to the inner surfaces of the two trapezoidal vertical plates (4-4-2); The wedge-shaped absorber system (5-2-4) includes m wedge-shaped absorbers C (5-2-4-1) that can move left and right. The collimator C (5-2-5) is machined with a trapezoidal through hole. Under the illumination of the point light source (102), its projection on the horizontal plane is the maximum field (103) of the beam delivery system (5). The liftable multi-leaf collimator (5-2-6) includes left and right double-layer multi-leaf collimators (5-2-6-1), the double-layer multi-leaf collimator (5-2-6-1) is connected to a vertical lifting mechanism (5-2-6-2), and the lifting mechanism (5-2-6-2) is connected to the outer surface of two trapezoidal vertical plates (4-4-2); The image-guided real-time positioning system (6) includes a ring-shaped mounting frame (6-1); the center of the ring-shaped mounting frame (6-1) forms the isocenter (101) of the treatment. The particle accelerator beam delivery system (5) is installed on the annular mounting frame (6-1), and the beam reaches the isocenter (101).

2. The particle accelerator therapy system according to claim 1, characterized in that: The treatment bed (7) is a five-axis treatment bed consisting of two rotary axes and three linear axes, including a bed board (7-1). The bed board (7-1) is connected to the outer ring of the rotary axis ZA (7-2) below it. The inner ring of the rotary axis ZA (7-2) is connected to one end of a swing arm (7-3). The other end of the swing arm (7-3) is movably connected to the linear mechanism ZB (7-4). The lower surface of the circular base of the linear mechanism ZB (7-4) is connected to the outer ring of a rotary axis ZB (7-5) whose axis is parallel to the Z-axis. The inner ring of the rotary axis ZB (7-5) is fixed in a frame that can move forward and backward and left and right.

Images