CN102737748B - Z-collimator and X-ray imaging device containing the same - Google Patents

Z-collimator and X-ray imaging device containing the same Download PDF

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CN102737748B
CN102737748B CN 201110081593 CN201110081593A CN102737748B CN 102737748 B CN102737748 B CN 102737748B CN 201110081593 CN201110081593 CN 201110081593 CN 201110081593 A CN201110081593 A CN 201110081593A CN 102737748 B CN102737748 B CN 102737748B
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collimator
ray
imaging
device
containing
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CN 201110081593
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CN102737748A (en )
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王薇
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上海西门子医疗器械有限公司
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Abstract

本发明涉及医疗设备领域,特别是一种Z-准直器,其在Z向上包括两个可旋转的准直板,每个准直板包括复数个不同长度的准直脚,通过旋转使所述两个准直板中相同长度的准直脚形成一个准直脚对,以进行准直。 The present invention relates to the field of medical equipment, in particular a collimator Z-, in which Z direction comprises two rotatable collimator plates, each bar includes a plurality of quasi-collimated legs of different lengths, by rotating the two quasi-collimated leg straight length of the same form feet on one collimator to collimate. 本发明还提供一种包括该Z-准直器的X射线成像设备。 The present invention provides further comprising the collimator Z- X-ray imaging apparatus.

Description

Z-准直器和包括Z-准直器的X射线成像设备 Z- Z- collimator comprises a collimator and an X-ray imaging apparatus

技术领域 FIELD

[0001] 本发明涉及医疗设备领域,特别是一种Z-准直器和包括该Z-准直器的X射线成像设备。 [0001] The present invention relates to the field of medical equipment, in particular a collimator Z- Z- and the collimator comprises an X-ray imaging apparatus.

背景技术 Background technique

[0002] 随着医疗水平的进步,X射线计算机断层成像(Computed Tomography, CT)扫描仪得到了广泛的应用。 [0002] With the progress of the medical level, X-ray computed tomography (Computed Tomography, CT) scanner has been widely used. CT扫描仪至少包括:旋转机架、X射线管和探测器。 CT scanner comprising at least: a rotating gantry, X-ray tube and the detector. 其中,旋转机架为环形结构,位于由水平轴X轴与竖直轴Y轴确定的平面内、且能够绕该旋转机架的Z轴旋转;在旋转机架上安装有X射线管,X射线管焦点在垂直于Z轴的方向上发射X射线。 Wherein the rotating gantry has an annular structure, located in the plane defined by the horizontal axis X and vertical axis Y-axis and rotatable about the Z axis of the rotating gantry; X-ray tube mounted on a rotating gantry, X ray tubes emits X-rays in a direction perpendicular to the Z axis. 通常在球管上还安装有两种准直器:Z-准直器和XY-准直器,其中,Z-准直器用于控制X射线束在探测器的Z方向的覆盖范围,而探测器在Z方向上是由若干排组成的,因此,通过对Z-准直器的准直缝开口宽度的控制,可调节X射线束在探测器上所覆盖的排数,从而对选层厚度进行调整;XY-准直器位于XY平面内,用于控制X射线束在XY平面的覆盖范围。 Typically mounted on the tube there are two further collimator: Z- and XY- collimator the collimator, wherein, Z- collimator for controlling the coverage of the X-ray beam in the Z-direction of the detector, and the detection in the Z direction is composed of several rows, thus, by controlling the opening width of the collimator slit Z- collimator can be adjusted rows of X-ray beam on the detector is covered, and thereby the layer thickness selected from adjustment; XY-collimator is located within the XY plane, for controlling the coverage of the X-ray beam in the XY plane.

[0003] 图1为目前CT扫描仪中常用的一种Z-准直器的示意图。 [0003] Figure 1 is a CT scanner is currently commonly used as a collimator Z- FIG. 这种准直器由一种薄金属片的屏蔽材料构成,具有复数个(图1所示为七个)不同开口宽度的准直缝,纵坐标是准直缝的开口宽度,横坐标是准直缝的长度。 Such a collimator shielding material composed of a thin metal sheet, has a plurality of (seven in Fig. 1) different from the collimator slit opening width, and the ordinate is the opening width of the collimator slit, the abscissa is the quasi- straight seam length. 不过这种Z-准直器占据的物理空间比较大,因为上述不同开口宽度的准直缝是预先一一布置在Z-准直器上的,在CT扫描时根据选层厚度的要求来选择合适开口宽度的准直缝,如当对选层厚度要求较高时(如对神经或血管进行扫描),可选择较开口宽度较小的准直缝,而对选层厚度要求不高时,可选择开口宽度较大的准直缝。 However, such a physical space occupied by the collimator Z- relatively large, because the collimator slit opening width different from the above is previously disposed on the eleven Z- collimator, a CT scan is selected according to the requirements of the selected layer thickness suitable opening width of the collimator slit, such as when (such as nerves or blood vessels scan), select a smaller width than the opening of the collimator slit, while the layer thickness is selected from selected from a layer thickness of less demanding requirement is high, Alternatively the opening width larger collimation slit. 由于这种Z-准直器是由准直缝的个数和开口大小来决定其占据的物理空间,而机架本身的空间有限,如果准直缝的个数较多,就会减少其它部件占据的物理空间。 Since this collimator Z- is determined that the physical space occupied by the number and size of the opening of the collimator slit, while the rack space is limited itself, if large number of collimating slits, the other member will reduce physical space occupied.

[0004] 图2为目前CT扫描仪中常用的另一种准直器,其由两个可移动的咬合准直板l(jawplate)组成,这两个颚板能在Z方向上沿着相反方向移动,以得到不同开口宽度的准直缝,如图2中开口宽度2和3所示。 [0004] FIG. 2 is now commonly used in a CT scanner further collimator, consisting of two movable engagement collimation plates l (jawplate) composed of two jaws which can be the opposite in the Z-direction moving the collimator slit to obtain a different opening width, the width of the opening 2 in FIG. 2 and 3. 这种情况下,虽然准直器占据的物理空间相对小了,但是根据选层厚度调整准直缝的开口宽度,操作过程比较复杂。 In this case, although the physical space occupied by the collimator is relatively small, but the layer thickness is selected according to the opening width of the collimator slit adjustment, the operation is more complex.

[0005] 公开号为CN101919700A的专利申请公开了一种包括若干个不同宽度的准直缝的准直器,其与前述第一种Z-准直器相似,缺陷也在于,该准直器占据的物理空间比较大。 [0005] Patent Application Publication No. CN101919700A discloses a number of different widths comprising a collimating slit collimator, which is similar to the first collimator Z-, defects in that the collimator occupies the physical space is relatively large.

发明内容 SUMMARY

[0006] 本发明的目的在于提供一种Z-准直器和包括该Z-准直器的X射线成像设备,以解决现有技术中存在的上述问题,达到既减少Z-准直器占据的物理空间,又易于调整准直缝的开口宽度。 [0006] The object of the present invention is to provide a collimator Z- and X-ray imaging apparatus comprising a collimator which Z-, to solve the above problems present in the prior art, to achieve both reduced Z- collimator occupies physical space, but also easy to adjust the opening width of the quasi-straight slit.

[0007] 有鉴于此,本发明提供一种Z-准直器,其在Z向上包括两个可旋转的准直板(bar),每个准直板包括复数个不同长度的准直脚(handle),通过旋转使所述两个准直板中相同长度的准直脚形成一个准直脚对,以进行准直。 [0007] Accordingly, the present invention provides a collimator Z-, in which Z direction comprises two rotatable collimator plates (bar), each bar includes a plurality of quasi-collimated legs of different lengths (handle) , by rotation of the two quasi-collimated leg straight length of the same form feet on one collimator to collimate. 这减少了Z-准直器在X方向上占用的机架的物理空间,并使准直缝的开口宽度更容易控制。 This reduces the physical space rack Z- collimator occupies in the X direction, and the opening width of the collimator slit is easier to control.

[0008] 根据本发明的一个实施例,所述两个准直板相同。 [0008] According to one embodiment of the present invention, the two quasi-identical straight. 以简化准直器的机械结构。 To simplify the mechanical structure of the collimator.

[0009] 根据本发明的另一个实施例,所述两个准直板对称布置。 [0009] According to another embodiment of the present invention, the two collimating plate arranged symmetrically.

[0010] 根据本发明的又一个实施例,所述两个准直板的旋转方向相反。 [0010] According to yet another embodiment of the present invention, the quasi-two opposite rotational directions of the bar.

[0011] 根据本发明的又一个实施例,每个准直板中的复数个准直脚是等角度间隔布置的。 [0011] According to yet another embodiment of the present invention, each of the plurality of collimator plates collimator feet are equiangularly spaced. 以方便控制准直脚。 To facilitate the control of collimation feet.

[0012] 本发明还提供一种包括所述Z-准直器X射线成像设备。 [0012] The present invention also provides a collimator said Z- X-ray imaging apparatus.

[0013] 从上述方案中可以看出,相比背景技术中第一种Z-准直器而言,本发明的Z-准直器采用的屏蔽材料更少,所以降低了成本。 [0013] As can be seen from the above embodiments, the background art compared in terms of a first Z- collimator, the collimator shielding material Z- present invention employs fewer, the cost is reduced. 而且本发明每个准直板的准直脚是等角度布置的,相比背景技术中第二种Z-准直器而言,准直缝的开口宽度更容易控制。 And each collimator plate collimated leg of the present invention are equiangularly disposed, the background art compared in terms of Z- second collimator, the opening width of the collimator slit is easier to control. 另外,本发明的Z-准直器在YZ平面上布置或者旋转,减少了在X方向上占用的机架的物理空间。 Further, Z- collimator of the present invention is disposed or rotate on the YZ plane, reducing the physical space rack occupies in the X direction. 同时,两个准直板相同,简化了准直器的机械结构。 Meanwhile, two quasi-identical straight, simplifying the mechanical structure of the collimator.

附图说明 BRIEF DESCRIPTION

[0014] 下面将通过参照附图详细描述本发明的实施例,使本领域技术人员更清楚本发明的上述及其它特征和优点,附图中: [0014] Embodiments of the invention will be described below with reference to the drawings, so that those skilled in the art to more clearly above and other features and advantages of the invention, the accompanying drawings in which:

[0015] 图1为目前CT扫描仪中常用的一种Z-准直器的示意图。 [0015] Figure 1 is a CT scanner is currently commonly used as a collimator Z- FIG.

[0016] 图2为目前CT扫描仪中常用的另一种Z-准直器的示意图。 [0016] FIG. 2 is a schematic diagram of another conventional collimator Z- CT scanner currently.

[0017] 图3为包括本发明Z-准直器的CT扫描仪的示意图。 [0017] FIG. 3 is a schematic view of the CT scanner Z- collimator of the present invention comprises.

[0018] 图4为本发明Z-准直器的准直脚对的示意图。 A schematic view of a collimated leg [0018] FIG. 4 of the present invention Z- collimator.

[0019] 图5为用本发明Z-准直器调整准直缝开口宽度的示意图,其中图5a是由一准直脚对形成的准直缝的示意图,图5b是由另一准直脚对形成的准直缝的示意图。 [0019] FIG. 5 is a collimator with the present invention Z- schematic prospective opening width adjustment straight seam, wherein FIG. 5a is a schematic diagram of a quasi straight seam formed by the collimator foot, FIG. 5b is collimated by another leg a schematic view of the collimator slit formed.

[0020] 附图标记 [0020] reference numerals

[0021] I现有技术中一种Z-准直器 [0021] I of one prior art collimator Z-

[0022] 2,3现有技术中另一种准直器的准直缝的不同开口宽度 [0022] 3 different opening width of another prior art collimator collimating slit

[0023] 4在扫描中心处的扫描宽度 [0023] 4 scans the scan width at the center

[0024] 5本发明Z-准直器的准直板 Collimator plate collimator Z- [0024] 5 invention

[0025] 6本发明Z-准直器一准直板的旋转中心与X射线束中心的距离 Quasi-distance X-ray beam and the center of rotation of the center bar of the collimator Z- [0025] The invention six

[0026] 7本发明Z-准直器准直缝的开口宽度 [0026] 7 Z- invention the opening width of the collimator slit collimator

[0027] 8探测器 [0027] The detector 8

[0028] 9 X射线管 [0028] 9 X-ray tube

[0029] 10扫描中心 [0029] 10 scanning center

[0030] 11〜15本发明Z-准直器的准直脚 [0030] The present invention is collimated leg 11~15 collimator Z-

具体实施方式 detailed description

[0031] 为使本发明的目的、技术方案和优点更加清楚,以下举实施例对本发明进一步详细说明。 [0031] To make the objectives, technical solutions, and advantages of the invention more apparent, the following give examples further illustrate the present invention in detail.

[0032] 以CT扫描仪为例,具体说明本发明的Z-准直器。 [0032] In a CT scanner, the detailed description Z- collimator invention.

[0033] 图3为XY平面的X射线扇形束角度β = O时,包括本发明Z-准直器的CT扫描仪在YZ平面的示意图。 When the X-ray fan beam angle [0033] FIG. 3 is an XY plane β = O, including the collimator Z- CT scanner of the present invention in a schematic view of the YZ plane. 本发明的Z-准直器包括两个可旋转的准直板5,这两个准直板5在Z向上对称布置,每个准直板5包括复数个(图3示意了四个)不同长度的准直脚,这两个准直板5中相同长度的准直脚形成一准直脚对,每对准直脚对构成一个准直缝,每个准直缝的开口宽度是固定的,例如0.94mm,1.42mm,2.66mm,4.2mm,7.45mm等,这点与背景技术中第一种准直器相同。 Z- collimator according to the present invention comprises two rotatable collimation plates 5, two collimator plates 5 are arranged symmetrically in the direction Z, each comprising a plurality of collimator plates 5 (FIG. 3 illustrates four) of different lengths Quasi straight legs, two collimator plates 5 collimated leg of the same length to form a collimated leg, each leg constituting a collimating slit collimator, the collimator slit width of each opening is fixed, for example, 0.94mm , 1.42mm, 2.66mm, 4.2mm, 7.45mm and the like, this is the same as the background art, a first collimator.

[0034] 图3中X射线管9发出的X射线束经本发明Z-准直器的准直后,由探测器8接收。 [0034] FIG. 3 is an X-ray beam 9 emitted by the X-ray tube collimator the collimator Z- present invention, received by the detector 8. 其中Θ为X射线锥形束角度,其大小由Z-准直器的准直缝开口宽度7决定,准直后的X射线锥形束在扫描中心10的扫描宽度用附图标记4表示,附图标记6为Z-准直器每个准直板的旋转中心与X射线束中心之间的距离,例如25mm。 Wherein Θ is the angle of the X-ray cone beam, the size of collimated by the collimator Z- straight slit opening width decision 7, the collimated X-ray cone beam reference numeral 4 represents a scanning width of the scanning center 10, reference numeral 6 is a distance between each center of rotation of the central X-ray beam collimation plate of Z- collimator, for example 25mm.

[0035] 本发明的Z-准直器的两个准直板5的材料、形状、大小等都是相同的,其材料可与现有技术中准直器所用的屏蔽材料相同,例如钨。 [0035] Z- two collimator plates of the collimator of the present invention a material, shape and size are the same 5, which may be the same material of the prior art the collimator shielding material used, such as tungsten. 优选地,每个准直板5中的复数个准直脚是等角度间隔布置的,以方便控制准直脚。 Preferably, each of the plurality of collimator plates 5 collimator equiangularly spaced feet to facilitate control collimated leg.

[0036] 图3中每个准直脚在YZ平面的截面为多边形,不过其形状可根据X方向上X射线扇形束角度β而发生改变,β通常为[-28°,28° ]。 In [0036] FIG. 3 in a cross section of each leg collimated YZ plane is a polygon, but the shape of the X-direction according to the X-ray fan beam angle change β, β usually [-28 °, 28 °]. 如图4所示,为本发明Z-准直器一对准直脚对的示意图,其中每个准直脚11在YZ平面的截面形状为弧形。 4, a schematic view of an alignment of the present invention Z- straight leg of the collimator, wherein the collimator leg 11 of each cross-sectional shape in the YZ plane is arcuate.

[0037] 图5是用本发明Z-准直器的调整准直缝开口宽度的示意图,其中横坐标为Z方向,纵坐标为Y方向。 [0037] FIG. 5 is a schematic view of regulating the opening width of the collimator quasi-Z- straight seam of the present invention, wherein the abscissa is the Z-direction, the ordinate is the Y-direction. 图5a和图5b中示意了由四个准直脚(12〜15)组成的准直板,实际上每个准直板的准直脚数目可以根据实际需要而定,本实施例中的四个准直脚12〜15并不用以限制每个准直板中准直脚的数目。 Figures 5a and 5b illustrates a quasi-collimated by four straight legs (12~15) consisting, in fact, the pin count per collimated the collimation plates may be set according to actual needs, in the embodiment according to the present embodiment four Quasi straight-leg 12~15 are not intended to limit the number of each of the quasi-collimated leg straight. 由于不同待检对象在扫描中心10的扫描宽度4是不等的,据此来选择合适的准直缝开口宽度,如5a中选用的是两个准直脚15形成的准直脚对构成的准直缝。 Depending on the object to be examined in a scanning width 10 of the scanning center 4 are unequal, whereby to select the appropriate width of the collimator slit opening, such as the choice of collimated 5a two foot legs collimator 15 is formed of a constituting collimation seam. 当扫描下一个待检对象时,通过使准直脚围绕每个准直板的旋转中心(轴)旋转,以选择合适的准直缝开口宽度,如在图5b中左侧的准直脚逆时针旋转,右侧的准直脚顺时针旋转,这样就选择了两个准直脚13形成的另一准直脚对构成的准直缝。 When a scan object to be examined by the collimator foot around a rotation center (axis) of each rotation of collimation plates, to select the appropriate width of the collimator slit opening, such as a collimator foot counterclockwise in the left side in FIG. 5b rotating collimator right foot clockwise rotation, the thus selected another two collimated collimated leg foot 13 is formed on the collimating slit configuration. 由于准直脚13比准直脚15的长度短,因此两个准直脚13形成的准直脚对构成的准直缝的开口宽度就比两个准直脚15形成的准直脚对构成的准直缝开口宽度大,穿过两个准直脚13形成的准直脚对构成的准直缝的X射线锥形束角度就更大,扫描的待检对象范围也就更大。 Due to the short length of the collimator the collimator leg foot 13 to the foot 15 of the collimator, the collimator and therefore two collimated leg foot 13 is formed an opening width of the collimator slit is formed on the configuration of the collimator than two pins 15 constituting collimator slit width of the large opening, two leg through the collimator collimating foot 13 is formed on the angle of the X-ray cone beam collimator slit configuration on a larger scanning range of an object to be examined the greater.

[0038] 本发明涉及医疗设备领域,特别是一种Z-准直器,其在Z向上包括两个可旋转的准直板,每个准直板包括复数个不同长度的准直脚,通过旋转使所述两个准直板中相同长度的准直脚形成一个准直脚对,以进行准直。 [0038] The present invention relates to the field of medical equipment, in particular a collimator Z-, in which Z direction comprises two rotatable collimator plates, each bar includes a plurality of quasi-collimated legs of different lengths, by rotating the two collimator plates collimated leg of the same length forming a collimated leg pair to collimate. 本发明还提供一种包括该Z-准直器的X射线成像设备。 The present invention provides further comprising the collimator Z- X-ray imaging apparatus.

[0039] 以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。 [0039] The foregoing is only preferred embodiments of the present invention but are not intended to limit the present invention, any modifications within the spirit and principle of the present invention, the, equivalent substitutions, improvements should be included in the within the scope of the present invention.

Claims (6)

  1. 1.一种Z-准直器,其特征在于,所述Z-准直器在Z向上包括两个可旋转的准直板(5),每个准直板包括复数个不同长度的准直脚(12〜15),通过旋转使所述两个准直板中相同长度的准直脚形成一准直脚对,以形成有一准直缝。 A collimator Z-, wherein said collimator comprises two Z- rotatable collimation plates (5) upward in the Z, collimator plates each comprising a plurality of collimators of different length legs ( 12~15), said two quasi-collimated leg straight length of the same is formed by rotation of the feet on the collimator, to form with a collimating slit.
  2. 2.根据权利要求1所述的Z-准直器,其特征在于,所述两个准直板相同。 The Z- collimator according to claim 1, characterized in that said two quasi-identical straight.
  3. 3.根据权利要求1所述的Z-准直器,其特征在于,所述两个准直板对称布置。 The Z- collimator according to claim 1, characterized in that the two collimator plates are arranged symmetrically.
  4. 4.根据权利要求3所述的Z-准直器,其特征在于,所述两个准直板的旋转方向相反。 The Z- collimator according to claim 3, characterized in that said two quasi straight in opposite rotational directions.
  5. 5.根据权利要求1所述的Z-准直器,其特征在于,每个准直板中的复数个准直脚是等角度间隔布置的。 The Z- collimator according to claim 1, characterized in that each of the plurality of collimator plates collimator feet are equiangularly spaced.
  6. 6.一种X射线成像设备,其包括如权利要求1-5中任一权利要求所述的Z-准直器。 6. An X-ray imaging apparatus, comprising Z- collimator according to any one of claims 1-5 as claimed in claim.
CN 201110081593 2011-03-31 2011-03-31 Z-collimator and X-ray imaging device containing the same CN102737748B (en)

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EP2827340A1 (en) * 2013-07-16 2015-01-21 Canon Kabushiki Kaisha Irradiation field-limiting apparatus, x-ray-generating unit including the irradiation field-limiting apparatus, and x-ray radiography system including the irradiation field-limiting apparatus

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CN1352537A (en) * 1999-12-27 2002-06-05 Ge医疗系统环球技术有限公司 Multi-slice x-ray CT apparatus and method for controlling the same
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