A kind of novel solid directional radiotherapy eutical systemTechnical field
A kind of novel solid directional radiotherapy eutical system of the present invention, belongs to radiotherapy in the treatment technical field.
Background technique
Radiotherapy (abbreviation radiotherapy) is one kind important in tumor therapeuticing method, and accurate radiotherapy is the important of radiotherapy fieldDeveloping direction.And stereotactic radiotherapy (SRS/SBRT) is an important component of accurate radiotherapy, including to tumourTarget area and normal or crisis organ accurate positioning and high dose lack the irradiation technique of gradation.More and more clinical proofs are verticalThe benefit of body directional radiotherapy.According to RTOG clinical data, it is contemplated that coming 10 years, stereotactic radiotherapy technology existUtilization rate in the cancer of the brain will increase by 108%；Utilization rate in extracranial tumors will increase by 144%.
The common method of stereotactic radiotherapy technology is realized at present are as follows: 1) gamma knife technology；2) it is based on linear acceleratingThe stereotactic radiotherapy equipment of device；3) proton or heavy ion line radiotherapy.Wherein, since gamma knife has technically simple maturation, thereforeThe advantages that barrier rate is extremely low, and maintenance is simple, easy to operate, and degree domestic is high, is widely used in China.
The hardware body structure of gyro knife is mainly made of roller, head, therapeutic bed three parts.Roller can be in equipment etc.The heart rotates 360 °, and commonly referred to as revolves.Head is mounted on roller, can be driven and be rotated by motor, commonly referred to asRotation.The side of head is equipped with Co 60 treatment head, by adjusting the setting angle for the treatment of head, realizes the ray for the treatment of head outputBeam and head self-driven mechanism line are at a fixed angle.When equipment works, while head is rotated with roller, treatment headIt is rotated with head, i.e., gyro rotates.
It is found by long-term practical application, moment gyroscope knife has the disadvantage that 1, due to the gyro rotation angle for the treatment of headDegree is fixed angle, causes exposure pathways adjustable extent small, cannot adjust incident angle according to actual clinical requirement；2, byIn head rotating constant airspeed, when drum rotation speed is very fast, the stepping gap for the treatment of head gyro rotation can be bigger, unfavorableIn reducing normal surrounding tissue dosage, it is unfavorable for promoting burnt skin ratio；3, treatment head is mounted on the side of head, since treatment head makesWith high desnity metals such as tungsten and uranium, cause treatment head quality very big, so head two sides mass loading is uneven, head rotating essenceDegree is insufficient, wears larger.
Summary of the invention
The invention overcomes the deficiencies of the prior art, and provides a kind of novel solid directional radiotherapy eutical systems, increaseThe incident angle range for adding ray improves burnt skin ratio and focus dosage rate, and head two sides mass loading balances, and improves machineHead running accuracy, reduces equipment attrition.
In order to solve the above-mentioned technical problem, a kind of the technical solution adopted by the present invention are as follows: novel solid directional radiotherapySystem, including pedestal, rotating cylinder, pallet, turntable, treatment head rack and treatment head, the rotating cylinder are movably arranged on bottomOn seat, and the rotating cylinder can move in a circle on pedestal with center axis, and the pallet is fixed in " soil " fontIt is arranged on rotating cylinder inner sidewall, and the plane of the pallet and rotating cylinder centerline axis parallel, the turntable are sleeved onOn pallet, and it is located between two supporting plates of pallet, and the rotation axis of the turntable and rotating cylinder central axis are flat at oneIt on face and is mutually perpendicular to, the turntable can carry out rotation, two treatment head machines in pallet under itself driving mechanism functionFrame is symmetricly set on turntable, and the lower end of the treatment head rack is located at below the lower end surface of pallet, the treatment head rackLower end be movably set with treatment head, the treatment head is arranged in treatment head rack by adjustment structure, and adjustings is tiedStructure can be adjusted for ensuring that the ray for the treatment of head is gathered in always the intersection of rotating cylinder central axis and turntable rotation axisAngle between whole treatment head ray and turntable rotation axis.
The structure of the adjustment structure includes arc-shaped guide rail, gear, driver, guide pad and frame body, the arc-shaped guide railIt is fixed in treatment head rack, the radian of the arc-shaped guide rail and the radian of rotating cylinder are equal, and the arc-shaped guide railThe center of circle be overlapped with rotating cylinder center of circle in section where arc-shaped guide rail, be provided with arc-shaped gear on the inside of the arc-shaped guide railItem, the gear matches are engaged on arc-shaped rack, and the frame body is movably arranged in treatment head rack, and the frame body is used forGear is limited on arc-shaped rack, and after one end of the frame body is movably arranged on arc-shaped guide rail by the guide pad of arcTreatment head is arranged in the other end of side, the frame body, and the frame body is provided with driver, and the driver connect with gear, is used forDriving gear, arcuately rack gear is mobile.
The driver is stepper motor or servo motor, and the stepper motor or servo motor are electrically connected with control moduleIt connects, stepper motor is controlled by control module or servo motor precisely acts, realize and the real-time and precise for the treatment of head is rotated.
Two treatment heads are synchronous or asynchronous to treatment head ray by respective stepper motor or servo motorAngle between turntable rotation axis is adjusted, to realize any adjusting of the angle in a certain range.
Compared with the prior art, the invention has the beneficial effects that: existing single treatment head is upgraded to double control by the present inventionHead is treated, mounting means of the treatment head on head is changed to packaged type by fixed, by driving motor, realizes treatment headTeetotum gyration is arbitrarily adjusted in a certain range, increases the incident angle range of ray, is preferably met clinical treatment and is wantedIt asks；Due to head rotating constant airspeed, when drum rotation speed is very fast, due on head according to having double treatment heads, treatment headThe stepping gap of gyro rotation can reduce half, be conducive to reduce normal surrounding tissue dosage, help to promote burnt skin ratio；In machineBoth sides of head symmetrically installs two treatment heads, under the premise of not increasing cobalt source loading of source amount, increases the quantity of collimating aperture, reducesThe height of radioactive source column, due to radiating the self-absorption exponent function relation of source height and radioactive source, so radiation can be greatly reducedThe self-absorption of source column improves focus dosage rate；Head two sides mass loading balance, improves head rotating precision, reduces equipmentAbrasion.
Detailed description of the invention
Following further describes the present invention with reference to the drawings.
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the schematic diagram of adjustment structure in the present invention.
In figure: 1 being pedestal, 2 be rotating cylinder, 3 be pallet, 4 be turntable, 5 be treatment head rack, 6 be treatment head, 7 beAdjustment structure, 71 be arc-shaped guide rail, 72 be gear, 73 be driver, 74 be guide pad, 75 be frame body, 76 be arc-shaped rack.
Specific embodiment
As shown in Figure 1 and Figure 2, a kind of novel solid directional radiotherapy eutical system of the present invention, including pedestal 1, rotating cylinder 2,Pallet 3, turntable 4, treatment head rack 5 and treatment head 6, the rotating cylinder 2 are movably arranged on pedestal 1, and the rotation is rolledCylinder 2 can move in a circle on pedestal 1 with center axis, and the pallet 3 is fixed at rotating cylinder 2 in " soil " fontOn inner sidewall, and the plane of the pallet 3 and 2 centerline axis parallel of rotating cylinder, the turntable 4 is sleeved on pallet 3, and positionBetween two supporting plates of pallet 3, and the rotation axis of the turntable 4 with 2 central axis of rotating cylinder in one plane and phaseMutually vertical, the turntable 4 can carry out rotation in pallet 3 under itself driving mechanism function, and two treatment head racks 5 are symmetricalIt is arranged on turntable 4, and the lower end of the treatment head rack 5 is located at below the lower end surface of pallet 3, the treatment head rack 5Lower end is movably set with treatment head 6, and the treatment head 6 is arranged in treatment head rack 5 by adjustment structure 7, the adjustingStructure 7 for ensuring that the ray for the treatment of head 6 is gathered in always the intersection of 4 rotation axis of 2 central axis of rotating cylinder and turntable,And the angle between 4 rotation axis of 6 ray for the treatment of head and turntable can be adjusted.
The structure of the adjustment structure 7 includes arc-shaped guide rail 71, gear 72, driver 73, guide pad 74 and frame body 75, instituteIt states arc-shaped guide rail 71 to be fixed in treatment head rack 5, the radian phase of the radian and rotating cylinder 2 of the arc-shaped guide rail 71Deng, and the center of circle of the arc-shaped guide rail 71 is overlapped with rotating cylinder 2 in the center of circle in 71 place section of arc-shaped guide rail, the arc is ledThe inside of rail 71 is provided with arc-shaped rack 76, and the gear 72 is matched to be engaged on arc-shaped rack 76,75 activity of frame bodyIt is arranged in treatment head rack 5, the frame body 75 is used to gear 72 being limited to arc-shaped rack 76, and the one of the frame body 75End is movably arranged on the rear side of arc-shaped guide rail 71 by the guide pad 74 of arc, and treatment head 6 is arranged in the other end of the frame body 75,The frame body 75 is provided with driver 73, and the driver 73 is connect with gear 72, for driving arcuately rack gear 76 of gear 72It is mobile.
The driver 73 is stepper motor or servo motor, and the stepper motor or servo motor are electrically connected with control moduleIt connects, stepper motor is controlled by control module or servo motor precisely acts, realize and the real-time and precise for the treatment of head 6 is rotated.
Two treatment heads 6 are synchronous by respective stepper motor or servo motor or asynchronous penetrate to treatment head 6Angle between 4 rotation axis of line and turntable is adjusted, to realize any adjusting of the angle in a certain range.
The present invention is constant in the current roller frame of holding, symmetrically installs two treatment heads in head two sides, two are controlledHead is treated to be mounted on head by lead screw and guide rail.Two treatment head synchronous adjustment treatment head rays and machine can be driven by motorHead self-driven mechanism line angulation, to realize that the angle is arbitrarily adjusted in a certain range.
Existing single treatment head is upgraded to double treatment heads by the present invention, by mounting means of the treatment head on head by fixingFormula is changed to packaged type, by driving motor, realizes that the teetotum gyration for the treatment of head is arbitrarily adjusted in a certain range, increasesThe incident angle range of ray preferably meets clinical treatment requirement；Due to head rotating constant airspeed, work as drum rotation speedWhen very fast, since, according to there is double treatment heads, the stepping gap for the treatment of head gyro rotation can reduce half, be conducive to reduce on headNormal surrounding tissue dosage helps to promote burnt skin ratio；Two treatment heads are symmetrically installed in head two sides, are not increasing cobalt sourceUnder the premise of loading of source amount, the quantity of collimating aperture is increased, reduces the height of radioactive source column, due to radiation source height and radioactive sourceSelf-absorption exponent function relation improve focus dosage rate so the self-absorption of radioactive source column can be greatly reduced；Head two stressesLoad balance is measured, head rotating precision is improved, reduces equipment attrition.
The embodiment of the present invention is explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned implementationsExample, within the knowledge of a person skilled in the art, can also make without departing from the purpose of the present inventionVarious change out.