CN108686309B - Image guide system for proton/heavy ion medical equipment system - Google Patents
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- CN108686309B CN108686309B CN201810701419.8A CN201810701419A CN108686309B CN 108686309 B CN108686309 B CN 108686309B CN 201810701419 A CN201810701419 A CN 201810701419A CN 108686309 B CN108686309 B CN 108686309B
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/103—Treatment planning systems
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1048—Monitoring, verifying, controlling systems and methods
- A61N5/1049—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1048—Monitoring, verifying, controlling systems and methods
- A61N5/1049—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam
- A61N2005/105—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam using a laser alignment system
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1048—Monitoring, verifying, controlling systems and methods
- A61N5/1049—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam
- A61N2005/1061—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam using an x-ray imaging system having a separate imaging source
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N2005/1085—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy characterised by the type of particles applied to the patient
- A61N2005/1087—Ions; Protons
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N2005/1092—Details
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses an image guidance system used in a proton/heavy ion medical equipment system, which comprises a base system, a rotating system and a control system, wherein the base system is used for supporting an imaging system and rotating the imaging system and realizing the reciprocating motion of the imaging system; the imaging system realizes the image guiding and positioning functions, comprises the main functions of a CBCT image guiding system and a two-dimensional imaging system, and also has the laser positioning function; the rotating system realizes that the imaging system rotates around the patient at a uniform speed of +/-180 degrees. The image guidance system provided by the invention can replace a large rotating rack in the traditional proton/heavy ion medical equipment and a large amount of electric power required by the rotating process of the rotating rack, so that a treatment room is miniaturized, and equipment at a treatment end is lightened; the system can accurately position the tumor position of a patient, has the function of a two-dimensional imaging system, can switch and use a CBCT image guide system or the two-dimensional imaging system at any time according to the tumor type and position, and integrates the CBCT image guide system and the two-dimensional imaging system in the past proton treatment equipment into one system.
Description
Technical Field
The invention belongs to the field of large proton/heavy ion medical equipment, relates to an image guide system, in particular to an image guide system used in a proton/heavy ion medical equipment system, and solves the problems of multiple types, large occupied space, multiple use resources, complex structure and the like of the traditional proton/heavy ion treatment end equipment; the system has the functions of the current advanced CBCT image guidance system and the two-dimensional imaging positioning function, so that the treatment end is of a single type, and a treatment room and an image guidance system can be designed more under the resource conditions of the same building scale, capital and the like.
Background
Large-scale medical proton treatment equipment is mature internationally at present, is used domestically, and the treatment end of the equipment plays an important role in the process of treating tumors. The invention provides a system with the functions of a CBCT image guide system and a two-dimensional imaging system, which is used for simplifying the image guide system at the treatment end and replacing the traditional cylinder type rotating frame.
Disclosure of Invention
The invention aims to provide an image guidance system for a proton/heavy ion medical equipment system, which is a system with functions of a CBCT image guidance system and a two-dimensional imaging system, so that the treatment end image guidance system is simplified and replaces a traditional cylindrical rotating frame.
The purpose of the invention can be realized by the following technical scheme:
an image guidance system for use in a proton/heavy ion medical device system, comprising a base system, an imaging system, and a rotation system; a motor, a screw rod and a linear rail are arranged on the base inclined plane of the base system to form a set of linear motion mechanism together, and the linear motion mechanism is used for driving the imaging system to move up and down along the base inclined plane; a fixed pulley is arranged at the top of the base, and a steel wire rope is wound on the fixed pulley; one end of the steel wire rope is fixed with the imaging system, and the other end of the steel wire rope is provided with a balance weight;
the frame of the imaging system is arranged on the inclined plane of the base; the frame is provided with a rotating system which is used for mounting and driving the X-ray source and the flat panel detector to do +/-180-degree reciprocating uniform rotation; the laser system is arranged on the rotating system; the steel wire rope fixing plate is fixedly connected with one end of the steel wire rope; the screw nut bracket is fixed on a screw nut of a screw of the base system;
a bearing seat of the rotating system is arranged on the frame through a mounting plate; the crossed roller bearing is a bearing with a toothed outer ring, the inner ring of the bearing is arranged on a bearing seat, and the pinion and the crossed roller bearing form a gear pair which is meshed with each other; the driving motor and the speed reducer are used for driving the pinion, and further driving the gear pair to work.
The base system supports the imaging system and the rotating system, and simultaneously realizes the reciprocating motion of the imaging system; the base system comprises a base, a motor, a screw rod, a linear rail, a fixed pulley, a steel wire rope and a counterweight; the base is formed by welding Q235A sectional materials, the base is in a right trapezoid shape, an included angle between an inclined plane of the base and a ground plane is an acute angle, and the bottom surface of the base is installed on the ground of a treatment room.
The lead screw fixing device is characterized in that two opposite linear rails are arranged on the inclined plane of the base along the length direction of the inclined plane, base plates are arranged at the upper end and the lower end of the inclined plane between the two linear rails respectively, lead screws are mounted on the base plates at the two ends through lead screw supporting seats respectively, a motor is mounted on the base plate at the upper end, the lead screws are parallel to the inclined plane of the base, and the motor outputs a shaft to the lead screws.
A supporting column is arranged at the position, located on one side of the right-angle edge, of the top of the base, and a fixed pulley is mounted on the supporting column; the fixed pulley, the steel wire rope and the balance weight form a set of balance weight parts together.
The imaging system realizes the function of image guiding and positioning, and comprises a CBCT image guiding system and a two-dimensional imaging system; the imaging system comprises a frame, a rotating system, an X-ray source, a flat panel detector, a shell, a laser system, a steel wire rope fixing plate and a lead screw nut bracket; the frame is formed by welding Q235A sectional materials, is in a right-angled triangle shape and is arranged on the inclined plane of the base; and a rotating system is arranged on the vertical right-angled edge of the frame.
The X-ray source is an instrument which can generate X-rays by high voltage electricity, and the flat panel detector is used for receiving the X-rays emitted by the X-ray source, converting the X-rays into signals and transmitting the signals to the computer image guidance system for image processing; the X-ray source and the flat panel detector are orthogonally arranged, the source image distance is more than 2800mm, and the source axle distance is more than 1400 mm.
The shell is arranged on a vertical right-angle edge of the frame, and the rotating system and the laser system are positioned in the shell; the laser system is a device that positions the imaging system to the location of the patient's tumor.
The steel wire rope fixing plate is arranged on the right-angled edge of the bottom surface of the frame; the screw nut bracket is arranged on the right-angled edge of the bottom surface of the frame; the diameter phi of the internal space of the imaging system is not less than 2000mm.
The rotating system realizes that the imaging system rotates around the patient at a uniform speed of +/-180 degrees; the rotating system comprises a bearing seat, a mounting plate, a crossed roller bearing, a pinion, a driving motor, a speed reducer and a motor bracket; the X-ray source, the flat panel detector and the laser system in the imaging system are arranged on the lower wing surface of the crossed roller bearing, and when the driving motor and the speed reducer drive the gear pair to rotate, the X-ray source, the flat panel detector and the laser system can rotate at a constant speed.
The invention has the beneficial effects that: the image guidance system provided by the invention can replace a large rotating rack in the traditional proton/heavy ion medical equipment and a large amount of electric power required by the rotating process of the rotating rack, so that a treatment room is miniaturized, and equipment at a treatment end is lightened; the image guidance system has the following characteristics:
(1) The system is provided with an independent CBCT image guide system, can accurately position the tumor position of a patient, has the function of a two-dimensional imaging system, can switch and use the CBCT image guide system or the two-dimensional imaging system at any time according to the tumor type and position, and integrates the CBCT image guide system and the two-dimensional imaging system in the past proton treatment equipment into one system;
(2) Compared with a rotary treatment room and a fixed treatment room which are equipped by the traditional proton/heavy ion medical equipment, the system has the advantages of compact structure, small occupied space, less utilization resources and the like.
a. The treatment head and the CBCT image guide system in the traditional proton/heavy ion medical equipment rotary treatment room rotate together with a cylinder type rotary frame, the image guide system in the system only requires the treatment head to be fixed on a capital construction wall, the image guide system is matched with a treatment chair, so that a patient reaches a designated area to carry out image positioning and later treatment, and the equipment only needs one treatment room;
b. the independent imaging device in the image guidance system can satisfy the CBCT image guidance system function, and can satisfy the two-dimensional imaging function when the imaging device is fixed (not rotating). After the tumor positioning is finished, the patient is fixed on the treatment chair, the imaging device of the image guidance system moves to the top, a treatment space is reserved, and the treatment head emits beams so as to carry out treatment.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic structural view of a base system according to the present invention;
FIG. 2 is a force analysis diagram of an imaging system in a base system according to the present invention;
FIG. 3 is a schematic view of an imaging system according to the present invention;
FIG. 4 is a schematic front view of the rotary system of the present invention;
FIG. 5 is a schematic side view of the rotary system of the present invention;
fig. 6 is a schematic view of the overall structure of the present invention.
Detailed description of the preferred embodiments
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An image guidance system for use in a proton/heavy ion medical device system, as shown in figures 1-6, has three functional components: base system, imaging system and rotating system, each functional unit main function has:
a base system: the imaging system is supported and rotated, and the imaging system reciprocates;
an imaging system: the system realizes the image guiding and positioning functions, comprises the main functions of a CBCT image guiding system and a two-dimensional imaging system, and has the laser positioning function;
a rotating system: the imaging system rotates around the patient at a uniform speed of +/-180 degrees;
the functional components can be realized by the following technical scheme:
1. a base system: as shown in fig. 1, the main parts of the base system include a base 1.1, a motor 1.2, a lead screw 1.3, a linear rail 1.4, a fixed pulley 1.5, a steel wire rope 1.6 and a counterweight 1.7;
(1) The base 1.1 is formed by welding Q235A profiles, the base 1.1 is in a right-angled trapezoid shape, an included angle between an inclined plane and a ground plane is an acute angle, and the bottom surface of the base is arranged on the ground of the treatment room;
(2) A motor 1.2, a lead screw 1.3 and a linear rail 1.4 are arranged on the inclined plane of the base 1.1; the motor 1.2, the lead screw 1.3 and the linear rail 1.4 jointly form a set of linear motion mechanism for driving the imaging system to move up and down along the inclined plane of the base; the method specifically comprises the following steps: two opposite linear rails 1.4 are arranged on the inclined plane of the base 1.1 along the length direction of the inclined plane, base plates are respectively arranged at the upper end part and the lower end part of the inclined plane between the two linear rails 1.4, lead screws 1.3 are arranged on the base plates at the two end parts through lead screw supporting seats respectively arranged, a motor 1.2 is arranged on the base plate at the upper end part, the lead screws 1.3 are arranged in parallel to the inclined plane of the base 1.1, and the output shafts of the motors 1.2 are connected with the lead screws 1.3;
(3) A fixed pulley 1.5 is arranged at the top of the base 1.1, and a steel wire rope 1.6 is wound on the fixed pulley 1.5; the method specifically comprises the following steps: a supporting column is arranged at the top of the base 1.1 and positioned on one side of the right-angle edge, and a fixed pulley 1.5 is arranged on the supporting column;
(4) One end of the steel wire rope 1.6 is fixed with the imaging system, and the other end is provided with a counterweight 1.7; the linear rail 1.4 is connected with an upper frame 2.1 of the imaging system through 4 sliding blocks on the linear rail;
(5) The fixed pulley 1.5, the steel wire rope 1.6 and the counterweight 1.7 jointly form a set of counterweight parts for balancing the downward component force G1 shown in the figure 2 (an imaging system and a rotating system), reducing the power of the motor 1.2 and improving the stability of linear motion;
2. imaging systems (including CBCT image guided systems and two-dimensional imaging systems); as shown in fig. 3, the imaging system mainly comprises a frame 2.1, a rotating system 2.2, an X-ray source 2.3, a flat panel detector 2.4, a housing 2.5, a laser system 2.6, a steel wire rope fixing plate 2.7 and a lead screw nut bracket 2.8;
(1) The frame 2.1 is formed by welding Q235A sectional materials, the frame 2.1 is in a right-angled triangle shape, and the surface of the frame is subjected to anti-rust treatment by baking paint; the frame 2.1 is arranged on the inclined plane of the base 1.1;
(2) A rotating system 2.2 is arranged on the frame 2.1, and the rotating system 2.2 is used for mounting and driving the X-ray source 2.3 and the flat panel detector 2.4 to do +/-180-degree reciprocating uniform rotation; the method specifically comprises the following steps: a rotating system 2.2 is arranged on the vertical right-angle edge of the frame 2.1;
(3) The X-ray source 2.3 is an instrument which can generate X-rays by high voltage electricity, the rays emitted by the X-ray source are cone-shaped beams, the flat panel detector 2.4 is used for receiving the cone-shaped beam X-rays emitted by the X-ray source 2.3, converting the cone-shaped beam X-rays into signals and transmitting the signals to computer image guidance system software for image processing;
(4) The X-ray sources 2.3 (two) and the flat panel detectors 2.4 (two) are orthogonally arranged, the source image distance is more than 2800mm, and the source axle distance is more than 1400 mm;
the above (1) - (4) are the working principle and technical characteristics of the CBCT image guidance system; the structure of the two-dimensional imaging system is the same as that of a CBCT image guidance system, but the X-ray source 2.3 and the flat panel detector 2.4 are in fixed positions during working and do not rotate around a patient, and the flat panel detector 2.4 receives cone-beam X-rays emitted by the X-ray source 2.3, converts the cone-beam X-rays into signals and transmits the signals to computer image guidance system software for image processing;
(5) The shell 2.5 is a shell piece for preventing a patient and medical staff from touching the internal structure of the equipment, and meanwhile, the appearance is beautified; the method specifically comprises the following steps: the shell 2.5 is arranged on the vertical right-angle edge of the frame 2.1, and the rotating system 2.2 and the laser system 2.6 are positioned in the shell 2.5;
(6) The laser system 2.6 is a device for positioning the imaging system to the tumor site of the patient; the method comprises the following specific steps: the laser system 2.6 is arranged on the rotating system 2.2; two laser systems 2.6 are provided, one laser system is positioned between the two flat panel detectors, and the other laser system is positioned between the X-ray source and the flat panel detectors;
the core part in the laser system 2.6 is two lasers, the two lasers are mutually arranged on a crossed roller bearing 3.3 of the rotating system at an angle of 90 degrees, one laser is right opposite to the front of a patient, the other laser is right opposite to the side of the patient, and the laser emitted by the lasers is red or green visible light with the wavelength of 500-600 nm;
(7) The steel wire rope fixing plate 2.7 is fixedly connected with one end of a steel wire rope 1.6 (the other end of the steel wire rope is fixed with a balance weight 1.7 in the base system); the method specifically comprises the following steps: the steel wire rope fixing plate 2.7 is arranged on the right-angled edge of the bottom surface of the frame 2.1;
(8) The lead screw nut bracket 2.8 is used for fixing a lead screw nut of a lead screw 1.3 on the base system, so that a motor in the base system can work, and the imaging system can be driven to reciprocate; the method comprises the following specific steps: the screw nut bracket 2.8 is arranged on the right-angled edge of the bottom surface of the frame 2.1;
(9) The diameter phi of the internal space of the imaging system is not less than 2000mm, so that the normal entrance and exit of a patient and a treatment chair are met;
3. a rotating system: as shown in fig. 4, the main parts of the rotating system 2.2 include a bearing seat 3.1, a mounting plate 3.2, a crossed roller bearing 3.3, a pinion 3.4, a driving motor and speed reducer 3.5, and a motor bracket 3.6;
(1) The bearing block 3.1 is arranged on a frame 2.1 of the imaging system through an installation plate 3.2;
(2) The crossed roller bearing 3.3 is a bearing with a toothed outer ring, an inner ring of the bearing is arranged on the bearing seat 3.1, and the pinion 3.4 and the crossed roller bearing 3.3 form a gear pair which is meshed with each other;
(3) The driving motor and the speed reducer 3.5 are used for driving the pinion 3.4 so as to drive the gear pair to work, and the rotating function is realized; the motor bracket 3.6 is used for fixing the driving motor and the speed reducer 3.5; the motor bracket 3.6 is mounted on the mounting plate 3.2.
(4) As shown in fig. 5, the lower airfoil surface of the crossed roller bearing 3.3 is provided with an X-ray source 2.3, a flat panel detector 2.4 and a laser system 2.6 in the imaging system, and when the driving motor and the speed reducer 3.5 drive the gear pair to rotate, the X-ray source 2.3, the flat panel detector 2.4 and the laser system 2.6 can realize uniform rotation;
4. implementation of the overall function
As shown in fig. 6, the patient sits at a designated position of the treatment chair according to the guidance of medical staff, the control room controls the treatment chair to move to a designated area, the motor 1.2 on the frame system 1 drives the imaging system 2 to descend, the laser system 2.6 is utilized to center the imaging system 2 to the approximate position of the tumor of the patient, the driving motor in the rotating system 2.2 drives the imaging system 2 to rotate around +/-180 degrees of the patient to acquire images, after the acquisition is completed, the motor in the frame system 1 drives the imaging system 2 to ascend, the treatment chair and the patient do not move, the computer carries out reconstruction and registration of the images, after the acquisition is completed, the treatment hair emits a particle beam to carry out treatment, the treatment is completed, the treatment chair is moved out, and the patient leaves.
Image guide system tree table used in proton/heavy ion medical equipment system
1. A base system:
the system mainly comprises a base, a linear rail, a lead screw, a motor, a counterweight and other parts.
(1) Base: welding a Q235A material into a whole, realizing the machining of local matching surfaces, and performing surface varnish baking treatment for rust prevention and appearance beautification;
(2) Line rail, lead screw and motor: the three parts form a set of motion mechanism together, a lead screw nut on the lead screw is connected with the imaging system, the motor drives the lead screw to rotate, so that the imaging system can reciprocate along the inclined plane of the base, when the imaging positioning is needed, the motor drives the imaging system to fall to reach a designated area, and the imaging system works; when the imaging positioning is finished, the motor drives the imaging system to rise, and enough space is ensured to be reserved for the treatment head to treat the patient;
(3) And (3) counterweight: because the imaging system is arranged on the inclined plane of the base, the force components in two directions can be generated by stress analysis, and the counterweight is used for balancing the force components in the direction of the inclined plane of the base.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (5)
1. An image guidance system for use in a proton/heavy ion medical device system, comprising a base system (1), an imaging system (2) and a rotation system (2.2), characterized in that:
a motor (1.2), a lead screw (1.3) and a linear rail (1.4) are arranged on the inclined plane of a base (1.1) of the base system (1) to jointly form a set of linear motion mechanism for driving the imaging system to move up and down along the inclined plane of the base; a fixed pulley (1.5) is arranged at the top of the base (1.1), and a steel wire rope (1.6) is wound on the fixed pulley (1.5); one end of the steel wire rope (1.6) is fixed with the imaging system, and the other end of the steel wire rope is provided with a balance weight (1.7);
the frame (2.1) of the imaging system (2) is arranged on the inclined plane of the base (1.1); the frame (2.1) is provided with a rotating system (2.2), and the rotating system (2.2) is used for mounting and driving the X-ray source (2.3) and the flat panel detector (2.4) to do +/-180-degree reciprocating uniform rotation; the laser system (2.6) is arranged on the rotating system (2.2); the steel wire rope fixing plate (2.7) is fixedly connected with one end of the steel wire rope (1.6); the screw nut bracket (2.8) is fixed on a screw (1.3) of the base system, and the screw nut is arranged on the screw nut;
a bearing seat (3.1) of the rotating system (2.2) is arranged on the frame (2.1) through a mounting plate (3.2); the crossed roller bearing (3.3) is a bearing with a toothed outer ring, the inner ring of the bearing is arranged on the bearing seat (3.1), and the pinion (3.4) and the crossed roller bearing (3.3) form a gear pair which is meshed with each other; the driving motor and the speed reducer (3.5) are used for driving the pinion (3.4) so as to drive the gear pair to work;
the base system supports the imaging system and the rotating system, and simultaneously realizes the reciprocating motion of the imaging system; the base system comprises a base (1.1), a motor (1.2), a lead screw (1.3), a linear rail (1.4), a fixed pulley (1.5), a steel wire rope (1.6) and a counterweight (1.7); the base (1.1) is in a right trapezoid shape, the inclined plane of the base forms an acute angle with the ground plane, and the bottom surface of the base is arranged on the ground of the treatment room;
two opposite linear rails (1.4) are arranged on the inclined plane of the base (1.1) along the length direction of the inclined plane, base plates are respectively arranged at the upper end part and the lower end part of the inclined plane between the two linear rails (1.4), lead screws (1.3) are arranged on the base plates at the two end parts through lead screw supporting seats respectively arranged on the base plates at the upper end parts, a motor (1.2) is arranged on the base plate at the upper end part, the lead screws (1.3) are arranged in parallel to the inclined plane of the base (1.1), and output shafts of the motor (1.2) are connected with the lead screws (1.3);
the imaging system realizes the function of image guiding and positioning, and comprises a CBCT image guiding system and a two-dimensional imaging system; the imaging system comprises a frame (2.1), a rotating system (2.2), an X-ray source (2.3), a flat panel detector (2.4), a shell (2.5), a laser system (2.6), a steel wire rope fixing plate (2.7) and a lead screw nut bracket (2.8); the frame (2.1) is in a right-angled triangle shape, and the frame (2.1) is arranged on the inclined plane of the base (1.1); a rotating system (2.2) is arranged on the vertical right-angle edge of the frame (2.1);
the steel wire rope fixing plate (2.7) is arranged on the right-angled edge of the bottom surface of the frame (2.1); the screw nut bracket (2.8) is arranged on the right-angled edge of the bottom surface of the frame (2.1); the diameter phi of the internal space of the imaging system is not less than 2000mm;
and an X-ray source (2.3), a flat panel detector (2.4) and a laser system (2.6) in the imaging system are arranged on the lower airfoil surface of the crossed roller bearing (3.3).
2. An image guidance system for use in a proton/heavy ion medical device system as claimed in claim 1, wherein: a supporting column is arranged at the position, located on one side of the right-angle edge, of the top of the base (1.1), and a fixed pulley (1.5) is mounted on the supporting column; the fixed pulley (1.5), the steel wire rope (1.6) and the counterweight (1.7) jointly form a set of counterweight component for balancing downward component force G1 of the imaging system and the rotating system.
3. An image guidance system for use in a proton/heavy ion medical device system according to claim 1, wherein: the X-ray source (2.3) is an instrument which can generate X-rays by high voltage electricity, and the flat panel detector (2.4) is used for receiving the X-rays emitted by the X-ray source (2.3), converting the X-rays into signals and transmitting the signals to the computer image guidance system for image processing; the X-ray source (2.3) and the flat panel detector (2.4) are orthogonally arranged, wherein the X-ray source comprises two X-ray sources (2.3) and two flat panel detectors (2.4), a connecting line of one X-ray source (2.3) and one flat panel detector (2.4) is orthogonal to a connecting line of the other X-ray source (2.3) and the other flat panel detector (2.4), the source image distance is more than 2800mm, and the source axis distance is more than 1400 mm.
4. An image guidance system for use in a proton/heavy ion medical device system as claimed in claim 1, wherein: the shell (2.5) is arranged on a vertical right-angle edge of the frame (2.1), and the rotating system (2.2) and the laser system (2.6) are positioned in the shell (2.5); the laser system (2.6) is a device for positioning the imaging system to the location of a tumour in a patient.
5. An image guidance system for use in a proton/heavy ion medical device system as claimed in claim 1, wherein: the rotating system realizes that the imaging system rotates around the patient at a uniform speed of +/-180 degrees; the rotating system (2.2) comprises a bearing seat (3.1), a mounting plate (3.2), a crossed roller bearing (3.3), a pinion (3.4), a driving motor and a speed reducer (3.5) and a motor bracket (3.6); when the driving motor and the speed reducer (3.5) drive the gear pair to rotate, the X-ray source (2.3), the flat panel detector (2.4) and the laser system (2.6) can realize uniform rotation.
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| CN111973213A (en) * | 2020-08-31 | 2020-11-24 | 赛诺威盛科技（北京）有限公司 | CT chassis structure, CT scanning device and CT scanning system |
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