WO2017020250A1 - 放疗系统 - Google Patents
放疗系统 Download PDFInfo
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- WO2017020250A1 WO2017020250A1 PCT/CN2015/086042 CN2015086042W WO2017020250A1 WO 2017020250 A1 WO2017020250 A1 WO 2017020250A1 CN 2015086042 W CN2015086042 W CN 2015086042W WO 2017020250 A1 WO2017020250 A1 WO 2017020250A1
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- treatment head
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- leaf collimator
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/01—Devices for producing movement of radiation source during therapy
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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
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- the present invention relates to the field of radiotherapy devices, and more particularly to a radiotherapy system.
- the present invention provides a radiotherapy system to solve the above problems.
- An embodiment of the present invention provides a radiotherapy system including at least a rotatable drum, a first treatment head, and a second treatment head, the rotatable drum rotating about a central axis thereof, the first treatment head and the second treatment head setting On the rotatable drum, and following the rotatable drum; the first treatment head and the second treatment head respectively generate radiation dose according to a treatment plan, and the first treatment head is provided with at least one first a leaf collimator having at least one second multi-leaf collimator disposed on the second treatment head, the first multi-leaf collimator having the same field range and accuracy as the second multi-leaf collimator or Different.
- the rotatable drum of the radiotherapy system of the present invention is provided with two treatment heads with different field ranges and different precisions, and the treatment head can provide treatment for patients from any angle during the rotation. Moreover, the combination of two field ranges and different precision treatment heads can provide a variety of radiation dose options without the need to replace a higher specific activity source, reducing costs.
- FIG. 1 is a schematic view showing the overall structure of a radiotherapy system of the present invention
- Figure 2 is a partial cross-sectional view of the radiotherapy system of Figure 1;
- FIG. 3 is a perspective view showing the structure of the radiotherapy system of Figure 2;
- Figure 4 is a schematic view showing the structure of the treatment head of the radiotherapy system of Figure 2;
- FIG. 5 is a functional block diagram of an embodiment of a control device of the radiotherapy system of Figure 2;
- Fig. 6 is a functional block diagram of another embodiment of the control device of the radiation therapy system of Fig. 2.
- FIG. 1 is a schematic overall structural diagram of an embodiment of a radiation therapy system 100 according to the present invention.
- the radiotherapy system 100 includes at least a rotatable drum 10, a first treatment head 20, and a second treatment head 30.
- the rotatable drum 10 is rotated about its central axis, and the first treatment head 20 and the second treatment head 30 are oppositely disposed on the rotatable drum 10 and follow the rotatable drum 10 to rotate around the central axis .
- the field areas of the first treatment head 20 and the second treatment head 30 are located on the central axis.
- the first treatment head 20 and the second treatment head 30 may each adopt a cobalt 60 radiation source or a medical linear accelerator radiation source, or may be a combination of a cobalt 60 radiation source and a medical linear accelerator radiation source, for example, the first treatment.
- the head 20 is a cobalt 60 source and the second treatment head 30 is a medical linear accelerator source.
- the radiotherapy system 100 further includes a base 40 and a treatment bed 50, wherein the base 40 is a regular, flat three-dimensional platform, and the rotatable drum 20 and the treatment bed 50 are fixedly disposed on the upper surface of the base 40, and are fixed. The way it can be fixed by screws or pins.
- the treatment bed 50 is used to carry and fix a patient.
- the treatment bed 50 can be a three-dimensional bed, a five-dimensional bed or a six-dimensional bed, and can accurately deliver the patient's part to a designated location for treatment.
- the rotatable drum 10 is driven by a driving mechanism 60 and rotated 360 degrees around its central axis. It can be understood that the driving mechanism 60 can be disposed at one end of the rotatable drum 10, at the bottom of the rotatable drum 10, and the like.
- the rotatable drum 10 has an annular shape, and two side of the rotatable drum 10 are provided with two receiving grooves 11 disposed opposite to each other.
- the first treatment head 20 and the second treatment head 30 respectively It is housed in the storage slot 11.
- the two receiving slots 11 have the same structure and are regular or irregular three-dimensional structures, such as a cubic type.
- the bottom surface 111 of the two receiving grooves 11 is provided with an opening (not shown), and the opening may have a circular shape, a quadrangular shape or the like.
- the rays of the first treatment head 20 and the second treatment head 30 are radiated from the opening to the field area through a corresponding multi-leaf collimator.
- the receiving groove 11 is respectively mounted with a guide rail 112 on two opposite side walls parallel to the central axis, and the mounting manner is screwing or welding.
- the guide rails 112 are curved, and each of the curved guide rails 112 has an arc range of 30° to 150°.
- the first treatment head 20 and the second treatment head 30 are respectively defined on the two guide rails 112 by respective sliding mechanisms (not shown), and are movable along the guide rails 112 in the receiving slots 11 .
- the sliding mechanism includes a driving motor 113, a gear 114, and each of the guide rails 112 is provided with two sliders 115.
- the drive motor 113 is coupled to a gear 114 that drives the gear 114 to rotate.
- the gear 114 is disposed adjacent to the guide rail 112, and the first treatment head 20 and the second treatment head 30 are fixed to the slider 115.
- the first treatment head 20 and the second treatment head 30 are respectively provided with arc-shaped racks 116 correspondingly engaged with the gears 114, and the drive motor 113 drives the gears 114 according to a preset distance to
- the first treatment head 20 and the second treatment head 30 are caused to swing on the guide rail 112 in the axial direction of the central axis.
- the gear 114 is driven by setting the transmission distance of the drive motor 113 in advance, and the treatment heads (the first treatment head 20 and the second treatment head 30) are moved on the curved guide rail 112.
- the range and accuracy of the first treatment head 20 may be the same as or different from the second treatment head 30, and the first treatment head 20 and the second treatment head 30 may generate radiation doses separately or simultaneously.
- the first treatment head 20 includes at least one first multi-leaf collimator 21
- the second treatment head 30 includes at least one second multi-leaf collimator 31, the first multi-leaf
- the field range and accuracy of the collimator 21 are the same or different from the second multi-leaf collimator 31, such that the range and accuracy of the first treatment head 20 are the same or different from the second treatment. Head 30, in this way, can meet different treatment needs.
- the first multi-leaf collimator 21 has a larger field range than the second multi-leaf collimator 31, but the treatment accuracy is lower than the second multi-leaf collimator 31, which can satisfy a larger area. /volume of the patient's site
- the treatment in contrast, the field range of the first multi-leaf collimator 21 is smaller than the second multi-leaf collimator 31, but the treatment accuracy is higher, which can satisfy the treatment of a small area/volume patient site.
- the first treatment head 20 can be selected, and when a smaller area/volume patient site needs to be treated, the second treatment head 30 can be selected, and For patients requiring high-dose treatment, two treatment heads can be selected for simultaneous treatment to avoid replacement of radioactive sources with higher specific activity.
- the field range is 0-500 mm*500 mm.
- the angle between the first treatment head 20 and the second treatment head 30 is 60-180°. In the present embodiment, the angle between the first treatment head 20 and the second treatment head 30 is 180°.
- the masses of the first treatment head 20 and the second treatment head 30 are substantially equal, so that the entire apparatus can be placed in equilibrium without any weighting.
- the mass of the first treatment head 20 and the second treatment head 30 may also be unequal, and may be set according to actual needs.
- the field ranges of the first treatment head 20 and the second treatment head 30 always fall on the central axis and overlap each other. Part of it, which facilitates precise treatment.
- the radiotherapy system 100 further includes a control system 70 for controlling open source or source of the first treatment head 20 and the second treatment head 30 according to a predetermined treatment plan, and controlling the first The opening size and field range of a multi-leaf collimator 21 and a second multi-leaf collimator 31.
- the control system 70 includes a first control device 71, a second control device 72, and a third control device 73, and the first control device 71 is configured to control at a first time according to a preset treatment plan.
- the first treatment head 20 is open source or off source, and controls the opening size and the field range of the first multi-leaf collimator 21;
- the second control device 72 is configured to be based on a predetermined treatment plan Controlling the second treatment head 30 to open source or shut down, and controlling the opening size and the field range of the second multi-leaf collimator 31;
- the third control device 73 is configured to control the first treatment head
- the open source or source is simultaneously performed with the second treatment head 30, and the opening size and the field range of the first multi-leaf collimator 21 and the second multi-leaf collimator 31 are simultaneously controlled.
- the control system 70a may further include a first control device 71a, a second control device 72a, a third control device 73a, and a fourth control device 74a
- the first control device 71a is for controlling the opening size and the field range of the first multi-leaf collimator 21 for controlling the opening size and the field range of the second multi-leaf collimator 31
- the third The control device 73a is for controlling the first treatment head 20 to open source or shut down
- the fourth control device 74a is for controlling the second treatment head 30 to open source or shut down.
- first control device 71a and the second control The device 72a may simultaneously or separately control the opening size and the field range of the first multi-leaf collimator 21 and the second multi-leaf collimator 31, the third control device 73a and the fourth control device 74a
- the open source or source of the first treatment head 20 and the second treatment head 30 can be controlled simultaneously or separately.
- the field ranges of the first treatment head 20 and the second treatment head 30 overlap each other, and the dose of the radiation can be precisely controlled according to a predetermined treatment plan to perform radiotherapy in the overlapping field areas. .
- the manner of movement of the first treatment head 20 and the second treatment head 30 may be set according to a specific situation.
- the first treatment head 20 and the second treatment head 30 may be separately fixedly disposed.
- the rotary drum 10 is mounted; or the curved guide rail 112 may be provided only in one of the receiving grooves 11, so that one of the treatment heads can swing in the axial direction of the central axis while the other treatment head is stationary.
- the radiotherapy system 100 more precisely controls the two treatment heads to swing along the guide rail 112 at the same speed by the engagement between the treatment head and the guide rail 112, while precisely controlling the field range of the treatment head and the multi-leaf collimator by the control device 50.
- the size and source of the open source and source of the source to precisely control the radiation dose for treatment.
- the radiotherapy system 100 further includes an Imaging Guided System (IGS) including a plurality of sets of stereoscopic image devices 80 mounted on the rotatable drum 10 through a field area or at a fixed angle.
- IGS Imaging Guided System
- the image guiding system includes two sets of stereoscopic image devices 80.
- Each set of stereoscopic image devices 80 includes a ray emitting unit 81 and a correspondingly disposed ray detecting plate unit 82, the ray emitting unit 81 and the ray detecting plate.
- the unit 82 is fixedly disposed on the rotatable drum 10 and is offset from the first treatment head 20 and the second treatment head 30 by a predetermined angle, respectively.
- the ray emitting unit 81 is an X-ray generator
- the ray detecting tablet unit 82 is an image detecting and collecting system such as a CCD.
- one or two sets of stereoscopic image devices 80 are installed on the rotatable drum 10 to perform real-time detection of the patient's body position and the spatial position of the lesion, and the space position compensation of the treatment bed and the treatment head is performed by using the detection result, thereby ensuring High-precision positioning during treatment to achieve precise radiotherapy.
- the angle between the two sets of the image devices ranges from 20 degrees to 160 degrees.
- two sets of the stereoscopic image devices 80 are cross-imaged.
- an integrated audio video system, a lighting system, an information display system, and an integrated control panel system may be mounted on the rotatable drum 10 for structural and functional expansion.
- the rotatable drum 10 of the present invention provides two conformal treatment heads on the rotatable drum 10, and the conformal treatment head can provide treatment to the patient from any angle during the rotation.
- the use of two conformal treatment heads can provide a variety of radiation dose options. For example, for large-area tumors, a large range of fields is required, and the treatment accuracy is relatively low; for small tumors, If you need a treatment with high precision, you can use a high-precision treatment head for small field treatment.
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Abstract
一种放疗系统（100），至少包括可旋转滚筒（10）、第一治疗头（20）以及第二治疗头（30），所述可旋转滚筒（10）绕其中心轴旋转，所述第一治疗头（20）和第二治疗头（30）设置在所述可旋转滚筒（10）上，并跟随所述可旋转滚筒（10）旋转；所述第一治疗头（20）和第二治疗头（30）根据治疗计划，分别产生辐射剂量，所述第一治疗头（20）上设置至少一个第一多叶准直器（21），所述第二治疗头（30）上设置至少一个第二多叶准直器（31），所述第一多叶准直器（21）的射野范围以及精度与所述第二多叶准直器（31）相同或相异。
Description
本发明涉及放疗器械领域，特别是涉及一种放疗系统。
现有的钴60适形放射治疗设备通常只配置一个适形放射治疗头，导致焦平面剂量率低。然而，高比活度源的成本是普通的低比活度源成本的3～5倍，在这种情况下，更换使用高比活度源的成本非常高，甚至超过增加一个适形头来提高焦平面剂量率的成本。而且，此种结构需要增加一个配重以平衡适形放射治疗头的重量，进一步增加了设备成本和安装成本。
再者，仅使用一个适形放射治疗头时，在同一时刻只能从一个方向向病灶发射一种辐射剂量，无法在不同角度同时对病灶进行叠加辐射治疗，降低了治疗方案的选择灵活性。
发明内容
为解决上述技术问题，本发明提供了一种放疗系统，以解决上述问题。
本发明一实施例提供一种放疗系统，至少包括可旋转滚筒、第一治疗头以及第二治疗头，所述可旋转滚筒绕其中心轴旋转，所述第一治疗头和第二治疗头设置在所述可旋转滚筒上，并跟随所述可旋转滚筒旋转；所述第一治疗头和第二治疗头根据治疗计划，分别产生辐射剂量，所述第一治疗头上设置至少一个第一多叶准直器，所述第二治疗头上设置至少一个第二多叶准直器，所述第一多叶准直器的射野范围以及精度与所述第二多叶准直器相同或相异。
本发明的放疗系统的可旋转滚筒上设置有两个射野范围以及精度不同的治疗头，在旋转过程中，治疗头可从任意角度为病患提供治疗。而且，两个射野范围以及精度不同的治疗头配合使用，可提供多种放射剂量的选择方式，且无需更换较高比活度的放射源，降低了成本。
图1是本发明一种放疗系统的整体结构示意图；
图2是图1的放疗系统的部分剖面示意图；
图3是图2的放疗系统的立体结构示意图；
图4是图2的放疗系统的治疗头的结构示意图；
图5是图2的放疗系统的控制装置的一实施例的功能模块图；
图6是图2的放疗系统的控制装置的另一实施例的功能模块图。
下面结合具体实施方式对本发明的技术方案作进一步更详细的描述。显然，所描述的实施方式仅仅是本发明的一部分实施方式，而不是全部的实施方式。基于本发明中的实施方式，本领域普通技术人员在没有作出创造性劳动的前提下所获得的所有其他实施方式，都应属于本发明保护的范围。
请参阅图1，图1是本发明提供的一种放疗系统100的一实施方式的整体结构示意图。所述放疗系统100至少包括可旋转滚筒10、第一治疗头20以及第二治疗头30。所述可旋转滚筒10绕其中心轴旋转，所述第一治疗头20和第二治疗头30相对设置在所述可旋转滚筒10上，并跟随所述可旋转滚筒10围绕所述中心轴旋转。本实施例中，所述第一治疗头20和第二治疗头30的射野区域位于所述中心轴上。
所述第一治疗头20与第二治疗头30可以均采用钴60放射源或医用直线加速器放射源，也可以是钴60放射源和医用直线加速器放射源两者的组合，例如，第一治疗头20是钴60放射源，第二治疗头30是医用直线加速器放射源。
在本实施方式中，所述放疗系统100还包括底座40和治疗床50，其中底座40是规则的、平整的立体平台，可旋转滚筒20和治疗床50固定设置于底座40的上表面，固定方式可以使通过螺钉或销钉固定。治疗床50用于承载和固定病患者，治疗床50可采用三维床、五维床或六维床，可精确地将病患部位送到指定位置进行治疗。
请结合图2至图4，本实施方式中，所述可旋转滚筒10通过一驱动机构60驱动，并环绕其中心轴360度旋转。可以理解的是，所述驱动机构60可设置于所述可旋转滚筒10的一端，也可设置在所述可旋转滚筒10的底部，等等。
在本实施方式中，所述可旋转滚筒10呈环状，所述可旋转滚筒10的侧壁内开设有两个正对设置的收容槽11，第一治疗头20和第二治疗头30分别收容在收容槽11内。本实施方式中，两个收容槽11结构相同，为规则或不规则的立体结构，如立方体型。两个收容槽11相对的底面111设有开口(图未示)，所述开口形状任意，可以是圆形、四边形等。所述第一治疗头20和第二治疗头30的射线通过对应的多叶准直器，从所述开口放射到射野区域。所述收容槽11在其平行于所述中心轴的两个相对侧壁上分别安装有一个导轨112，安装方式为螺接或焊接等方式。本实施方式中，所述导轨112呈弧形，每个弧形导轨112的弧度范围为30°～150°。在本实施方式中，所述第一治疗头20和第二治疗头30分别通过各自的滑动机构(图未示)限定于两个导轨112上，并且可在收容槽11内沿导轨112运动，从而能够在可旋转滚筒10的中心轴延伸方向进行摆动，使第一治疗头20和第二治疗头30除跟随可旋转滚筒10转动外，还可在中心轴轴向截面的维度上摆动，以调节治疗时放射线的入射角。
具体的，所述滑动机构包括一个驱动电机113、一个齿轮114，以及每个所述导轨112上设置有两个滑块115。所述驱动电机113与齿轮114相连接，所述驱动电机113驱动所述齿轮114转动。所述齿轮114与所述导轨112相邻设置，所述第一治疗头20和第二治疗头30固定在所述滑块115上。所述第一治疗头20和第二治疗头30上分别设置有与所述齿轮114对应啮合的弧形齿条116，所述驱动电机113根据预先设定的距离，驱动所述齿轮114，以带动所述第一治疗头20和第二治疗头30在导轨112上沿所述中心轴的轴向摆动。通过预先设置驱动电机113的传动距离，使之带动齿轮114，并使得治疗头(第一治疗头20和第二治疗头30)在弧形导轨112上进行移动。
所述第一治疗头20的射野范围以及精度与所述第二治疗头30可相同，也可不同，且所述第一治疗头20和第二治疗头30可分别或同时产生辐射剂量。在本实施方式中，所述第一治疗头20包括至少一个第一多叶准直器21，所述第二治疗头30包括至少一个第二多叶准直器31，所述第一多叶准直器21的射野范围以及精度与所述第二多叶准直器31相同或相异，使得所述第一治疗头20的射野范围以及精度相同或相异于所述第二治疗头30，如此，可以满足不同治疗需求。例如，所述第一多叶准直器21的射野范围大于所述第二多叶准直器31，但是治疗精度低于所述第二多叶准直器31，可满足对较大面积/体积病患部位的
治疗，反之，所述第一多叶准直器21的射野范围小于所述第二多叶准直器31，但是治疗精度较高，可满足对较小面积/体积病患部位的治疗。因此，当需要对较大面积/体积病患部位进行治疗时，可选择第一治疗头20，当需要对较小面积/体积病患部位进行治疗时，可选择第二治疗头30，而对于需要大剂量治疗的患者，则可选择两个治疗头同时进行治疗，以避免更换更高比活度的放射源。本实施例中，所述射野范围是0-500mm*500mm。
所述第一治疗头20和第二治疗头30之间的夹角为60～180°。在本实施方式中，所述第一治疗头20和第二治疗头30之间的夹角为180°。且所述第一治疗头20和第二治疗头30的质量大致相等，所以无需做任何配重即可使整个装置处于平衡状态。当然，所述第一治疗头20和第二治疗头30的质量也可以不相等，视实际需求进行设置。此外，通过控制第一治疗头20和第二治疗头30始终位于同一个焦平面上，使得第一治疗头20和第二治疗头30的射野范围始终落在中心轴上，且具有相互重叠的部分，从而利于精确治疗。
请参阅图5，该放疗系统100进一步包括控制系统70，用于根据预先设定的治疗计划，控制所述第一治疗头20与第二治疗头30的开源或关源，以及控制所述第一多叶准直器21和第二多叶准直器31的开口大小和射野范围。本实施例中，该控制系统70包括第一控制装置71、第二控制装置72以及第三控制装置73，所述第一控制装置71用于根据预先设定的治疗计划，在第一时间控制所述第一治疗头20开源或关源，以及控制所述第一多叶准直器21的开口大小和射野范围；所述第二控制装置72用于根据预先设定的治疗计划，在第二时间控制所述第二治疗头30开源或关源，以及控制所述第二多叶准直器31的开口大小和射野范围；所述第三控制装置73用于控制第一治疗头20与第二治疗头30同时进行开源或关源，以及同时控制所述第一多叶准直器21和第二多叶准直器31的开口大小和射野范围。
请参阅图6，在另一实施方式中，所述控制系统70a还可以包括第一控制装置71a、第二控制装置72a、第三控制装置73a以及第四控制装置74a，所述第一控制装置71a用于控制第一多叶准直器21的开口大小和射野范围，所述第二控制装置72a用于控制第二多叶准直器31的开口大小和射野范围，所述第三控制装置73a用于控制第一治疗头20进行开源或关源，所述第四控制装置74a用于控制第二治疗头30进行开源或关源。而且，所述第一控制装置71a和第二控
制装置72a可同时或分别不同时控制所述第一多叶准直器21和第二多叶准直器31的开口大小和射野范围，所述第三控制装置73a和第四控制装置74a可同时或分别控制第一治疗头20和第二治疗头30的开源或关源。在本实施方式中，第一治疗头20和第二治疗头30的射野范围相互重叠，可按照预先设定的治疗计划，精确地控制放射线的剂量，以在重叠的射野区域内进行放疗。
在其他实施例中，所述第一治疗头20和第二治疗头30的运动方式可根据具体情况进行设置，例如，所述第一治疗头20和第二治疗头30可分别固定设置在可旋转滚筒10上；或者可仅在其中一个收容槽11内设置弧形导轨112，使得其中一个治疗头能够沿中心轴的轴向摆动，而另外一个治疗头静止。放疗系统100通过治疗头和导轨112之间的啮合，更精确地控制两个治疗头以相同的速度沿导轨112摆动，同时通过控制装置50精确控制治疗头的射野范围和多叶准直器的大小以及放射源的开源与关源，从而精确控制用于治疗的放射剂量。
此外，所述放疗系统100还包括动态影像引导系统(Imaging guided system,简称IGS)，其包括在可旋转滚筒10上通过射野区域安装一组或成固定角度的多组立体影像装置80。本实施例中，所述影像引导系统包括两组立体影像装置80，每组立体影像装置80包括一个射线发射单元81以及对应设置的射线探测平板单元82，所述射线发射单元81以及射线探测平板单元82固定设置在所述可旋转滚筒10上，且分别偏离所述第一治疗头20与第二治疗头30预定的角度。更具体的，所述射线发射单元81是X光发生器，所述射线探测平板单元82是影像探测采集系统，例如CCD。具体的，在可旋转滚筒10上，安装一组或两组立体影像装置80，来进行实时的患者体位、病灶空间位置的检测，利用检测结果对治疗床和治疗头进行空间位置补偿，从而保证治疗过程中的高精度定位，实现精确放疗。当采用两组立体影像装置80时，两组所述影像装置的夹角范围在20度到160度之间。本实施例中，两组所述立体影像装置80之间相互交叉成像。此外，可旋转滚筒10上还可以安装例如集成的音频视频系统、灯光照明系统、信息显示系统以及集成的控制面板系统(图未示)等，以进行结构和功能扩展。区别于现有技术的情况，本发明的放疗系统100的可旋转滚筒10上设置有两个适形治疗头，在旋转过程中，适形治疗头可从任意角度为病患提供治疗。而且，两个适形治疗头配合使用，可提供多种放射剂量的选择方式，例如，对于大面积的肿瘤，要求射野范围大，而对治疗精度的要求相对较低；而对于小肿瘤，
则需要治疗精度比较高的治疗，这时就可以选用小射野高精度的治疗头进行治疗。如果设置两个射野范围大而治疗精度低的适形头，无法对小肿瘤进行放疗，如果设置两个治疗精度高而射野范围小的适形头，则无法对大面积肿瘤进行放疗。因此，现有的双头放疗设备的通用性不强。此外，当需要较高比活度的放射源时，仅需要同时开启两个治疗头，而无需更换较高比活度的放射源，降低了成本。
以上所披露的仅为本发明实施方式中的较佳实施方式而已，当然不能以此来限定本发明的权利范围，因此依本发明权利要求所作的等同变化，仍属本发明所涵盖的范围。
Claims (10)
- 一种放疗系统，至少包括可旋转滚筒、第一治疗头以及第二治疗头，所述可旋转滚筒绕其中心轴旋转，所述第一治疗头和第二治疗头设置在所述可旋转滚筒上，并跟随所述可旋转滚筒旋转；其特征在于，所述第一治疗头和第二治疗头根据治疗计划分别产生辐射剂量，所述第一治疗头上设置至少一个第一多叶准直器，所述第二治疗头上设置至少一个第二多叶准直器，所述第一多叶准直器的射野范围以及精度与所述第二多叶准直器相同或相异。
- 根据权利要求1所述的放疗系统，其特征在于，所述可旋转滚筒的侧壁内开设有两个正对设置的收容槽，所述第一治疗头和第二治疗头分别收容在收容槽内，所述收容槽在其相对的侧壁上分别安装有一个导轨，第一治疗头或第二治疗头的两端分别通过滑动机构限定在相对的两个导轨上，从而能够沿所述导轨在所述中心轴的延伸方向上摆动。
- 根据权利要求1所述的放疗系统，其特征在于，所述第一治疗头与所述第二治疗头之间的夹角为60～180度。
- 根据权利要求3所述的放疗系统，其特征在于，所述第一治疗头与所述第二治疗头的射野包含相互重叠的部分。
- 根据权利要求1所述的放疗系统，进一步包括：第一控制装置，用于根据预先设定的治疗计划，在第一时间控制所述第一治疗头开源或关源，以及控制所述第一多叶准直器的开口大小和射野范围；第二控制装置，用于根据预先设定的治疗计划，在第二时间控制所述第二治疗头开源或关源，以及控制所述第二多叶准直器的开口大小和射野范围，所述第二时间不同于所述第一时间。
- 根据权利要求5所述的放疗系统，进一步包括：第三控制装置，用于控制第一治疗头与第二治疗头同时进行开源或关源，以及同时控制所述第一多叶准直器和第二多叶准直器的开口大小和射野范围。
- 根据权利要求1所述的放疗系统，其特征在于，进一步包括：第一控制装置，用于控制第一多叶准直器的开口大小和射野范围；第二控制装置，用于控制第二多叶准直器的开口大小和射野范围；第三控制装置，用于控制第一治疗头进行开源或关源；第四控制装置，用于控制第二治疗头进行开源或关源；其中，所述第一控制装置和第二控制装置可同时或分别不同时控制所述第一多叶准直器和第二多叶准直器的开口大小和射野范围，所述第三控制装置和第四控制装置可同时或分别不同时控制第一治疗头和第二治疗头的开源或关源。
- 根据权利要求1所述的放疗系统，其特征在于，所述第一治疗头与第二治疗头均采用钴60放射源或医用直线加速器放射源，或对应采用钴60放射源与医用直线加速器放射源进行组合。
- 根据权利要求1所述的放疗系统，进一步包括影像引导系统，所述影像引导系统包括两个射线发射单元以及对应设置的射线探测平板单元，所述射线发射单元以及射线探测平板单元固定设置在所述滚筒上，且分别偏离所述第一治疗头与第二治疗头预定的角度。
- 根据权利要求1所述的放疗系统，其特征在于，所述第一治疗头以及第二治疗头的质量大致相等。
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