CN100534389C - X-ray computed tomographic apparatus - Google Patents

X-ray computed tomographic apparatus Download PDF

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CN100534389C
CN100534389C CN 200610129107 CN200610129107A CN100534389C CN 100534389 C CN100534389 C CN 100534389C CN 200610129107 CN200610129107 CN 200610129107 CN 200610129107 A CN200610129107 A CN 200610129107A CN 100534389 C CN100534389 C CN 100534389C
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ray
base
rotating
portion
unit
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CN 200610129107
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CN1927121A (en )
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佐渡友哲也
原田智和
中野真
信藤康孝
五反田克己
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株式会社东芝;东芝医疗系统株式会社
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Abstract

X射线计算机断层摄影装置,具备可以以轴心线为中心旋转地被支撑的圆筒型旋转基体(11)、搭载在上述旋转基体(11)上的X射线管单元(12)、搭载在上述旋转基体(11)上的X射线检测单元(13)、固定在上述旋转基体(11)端部、且刚性比上述旋转基体(11)大的加固环(15)。 X-ray computed tomography apparatus includes a cylindrical rotating substrate (11) may be the axis as the center is rotatably supported, is mounted on the rotary base X-ray tube unit (12) (11), mounted above rotating base X-ray detection unit (13) (11), fixed to the rotating base (11) end and rigidity than the rotation base (11) is large reinforcing ring (15).

Description

X射线计算机断层摄影装置 The X-ray computed tomography apparatus

技术领域 FIELD

本发明有关具备为取得被检体x射线断层图像而旋转的旋转部的 For the present invention includes a rotary portion is made to be x-ray tomographic image of the object is rotated

X射线计算机断层摄影装置。 The X-ray computed tomography apparatus.

背景技术 Background technique

X射线计算机断层摄影装置(以下称"X射线CT (Computed Tomography)装置")是根据穿透被检体的X射线的强度,提供作为图像的有关被检体的信息,在以疾病诊断、治疗及手术计划等为主的许多医疗行为中起到重要作用。 The X-ray computer tomography apparatus (hereinafter referred to as "X-ray CT (Computed Tomography) apparatus") is based on the intensity of X-rays to penetrate the subject's body, provides information about the subject as an image, in order to diagnose disease, treatment It plays an important role in surgical planning and consisting mainly of many medical practices.

这种X射线CT装置,具有圆环状的旋转基体。 This X-ray CT apparatus having an annular rotating base. 该旋转基体以其轴心为中心自由旋转地被支撑,在旋转基体的内侧,固定了X射线管、 X射线检测器、高电压产生装置等各种装置。 The rotating base around the axial center rotatably supported on the inside of the rotating base, the fixed X-ray tube, a variety of other means X-ray detector, the high voltage generator.

旋转基体旋转的话,X射线管和X射线检测器的朝向变化。 Then rotating the rotating base, X-ray tube and the X-ray detector orientation changes. X射线CT装置,利用上述的X射线管和X射线检测器的朝向的变化,从各种方向对被检体进行摄影(例如,参照特开平8-52130号公报)。 X-ray CT apparatus using the above-described change in orientation of the X-ray tube and an X-ray detector, for photographing the subject (e.g., refer to Japanese Patent Publication No. 8-52130) from various directions.

然而,由于X射线管、X射线检测器、高电压产生装置等重量大, 所以旋转基体高速旋转的话,固定于基体内侧的X射线管、X射线检测器、高电压产生装置等重物产生很大的离心力,往往造成旋转基体变形。 However, since the X-ray tube, an X-ray detector, the high voltage generating heavy device, etc., so that the rotating base rotates at high speed, then, is fixed to the inner side of the base body of the X-ray tube, an X-ray detector, the high voltage generating means and other heavy produce a very large centrifugal force, often resulting in deformation of the rotating base.

如果旋转基体变形引起X射线管设置角度偏移的话,那么由X射线管照射的X射线的角度错位,所以X射线检测器变得不能正确进行X射线检测。 If the rotation base deformation X-ray tube disposed angularly offset, then the misalignment angle of the X-ray tube irradiating X-rays, the X-ray detector for X-ray detector becomes unable to correct. 而且,X射线线路错位的话,检测X射线的位置变化, 将引起图像劣化。 Furthermore, X-ray, then the dislocation line, the X-ray detected change in position, will cause image deterioration.

以下, 一边参照图11, 一边以其他事例为例进一步进行说明。 Hereinafter, with reference to FIG. 11, while in other instances as an example will be described further. 图11是表示现有的旋转部40构成的剖面图。 FIG 11 is a sectional view showing a conventional rotary portion 40 thereof. 如图ll所示,现有的X射线CT装置的台架,设有为获取被检体X射线断层图像而可高速(例如大于等于1秒/转)连续旋转的旋转部40。 As shown in FIG ll, the conventional X-ray CT gantry, and is provided to acquire X-ray tomographic image of a subject and may be a high speed (e.g. not less than 1 second / revolution) continuously rotating portion 40 rotates. 该旋转部40介于轴承91,可自由旋转地保持在框架23上。 The rotating portion 40 is interposed bearing 91, is rotatably held on the frame 23. 该旋转部40,安装了X射线管单元41、 X射线检测单元42、信号放大单元43及其他单元(图中未显示)。 The rotating portion 40, the mounting unit 41 is the X-ray tube, the X-ray detection unit 42, a signal amplifying unit 43 and other units (not shown). 以下,往往把这些各单元统称为旋转部单元。 Hereinafter, these units are often referred to as the rotation unit portion. 这些各旋转部单元,:故安装在以转轴N为中心的环状的平板部48 (平板)上。 The rotating portions of each unit: flat plate portion 48 (flat plate) is mounted to the shaft so that N is the center of the ring.

上述平板部48的外周端,形成了滚筒状的滚筒部49。 The flat plate portion 48 of the outer peripheral end to form a roll-like portion 49 of the drum. 以下把平板部48和滚筒部49统称为旋转基体52。 The following portion of the flat plate portion 48 and the drum 49 rotating base 52 collectively. 旋转基体52介于轴承91净皮保持在框架23上,轴承91由平板部48和轴承保持部24夹持。 Rotating base 52 interposed between the bearing 91 on the frame holding the skin net 23, the bearing plate 9124 is held by holding portion 48 and the bearing portion.

把各旋转部单元安装在滚筒部49内侧上的X射线CT装置已孚皮 X-ray CT apparatus of the rotating portion of each unit is mounted on the inside of the drum portion 49 of the sheath has Fu

7>开(例如,参照特开平2000-116641号公报)。 7> open (e.g., refer to Japanese Patent Publication No. 2000-116641). 在这种旋转部40上, 旋转部40的转轴N方向上的各旋转部单元的重心位置往往与平板部48的位置不一致。 On such rotating portion 40, the center of gravity position of the rotating portion of each unit on the rotational direction of the shaft portion 40 of the N often inconsistent with the position of the flat plate portion 48. 例如,X射线管单元41及X射线检测单元42,被配置成用夹被检体并与X射线管单元41相对配置的X射线检测单元42检测从X射线管单元41照射并穿透被检体的X射线。 For example, the X-ray tube unit 41 and the X-ray detection unit 42, a clip 42 is configured to detect the X-ray detection unit with the subject and the X-ray tube unit 41 disposed opposite from the irradiation unit 41 and the X-ray tube penetrate the subject X-rays of the body. 也就是说, X射线管单元41,虽然是为了相对平板部48在离开转轴N方向的位置且平行地形成X射线的穿透面而照射X射线,但是X射线管单元41的重心经常位于X射线产生位置附近。 That is, the X-ray tube unit 41, while the opposite flat plate portion is to be formed and the rotating shaft 48 at a position away from the direction N parallel to plane X-rays penetrate the X-ray irradiation, but the focus of the X-ray tube unit 41 is often located on the X rays generated near the position. 具体地说,X射线产生位置附近配置了转动体(阳极)及为对泄漏X射线进行屏蔽的防护铅等重物。 Specifically, X-ray generating position near the rotary body arranged (anode) and X-rays for the leakage protective shield lead weights. 因此,X射线管单元41的重心相对平板部48处于离开转轴N方向的位置。 Thus, the focus of the X-ray tube unit 41 of the opposite flat plate portion 48 at a position away from the rotation axis N direction. 此外,由于X射线检测单元42被配置在平板部48的X射线穿透表面侧,所以其重心与X射线管单元41的重心一样,相对平板部48处于偏离转轴N方向的位置。 Further, since the X-ray detection unit 42 is arranged in the X-ray transmission side surface of the plate portion 48, so that its center of gravity and the center of gravity of the X-ray tube unit 41 as opposite flat plate portion 48 at a position offset from the rotation axis N direction. 另外,其他旋转部单元,出于维修时方便作业的考虑,相对平板部48被配置在与X射线管单元41 及X射线检测单元42相同一侧,所以与X射线管单元41及X射线检测单元42—样,重心位置经常错位。 Further, the rotating portion other means considered convenient for maintenance operations, the opposite flat plate portion 48 is disposed at the same side of the X-ray tube unit 41 and the X-ray detection unit 42, so that the X-ray tube 41 and X-ray detecting unit 42- sample unit, the position of the center of gravity is often displaced.

旋转部40高速旋转的话,各旋转部单元的重心受到离心力作用。 Rotating portion 40 rotates at high speed, then the center of gravity of each portion of the rotating unit by centrifugal force. 例如,图11所示的作用于X射线管单元41的离心力F就是其一例。 For example, the effect shown in Figure 11 the X-ray tube unit centrifugal force F 41 is an example thereof. 例如,从转轴N到X射线管单元41重心的距离为600mm且转速为0.5秒/转时,产生约IOG的重力加速度。 For example, N from rotary shaft 41 to the center of gravity of the X-ray tube unit distance of 600mm and the speed is 0.5 sec / rev, is generated gravitational acceleration of about IOG. 此外,从转轴N到X射线管单元41重心的距离为600mm且旋速为0.4秒/转时,产生约15G的重力加速度。 In addition, N from rotary shaft 41 to the center of gravity of the X-ray tube unit distance of 600mm and a spin speed of 0.4 seconds / rpm, to generate gravitational acceleration of about 15G.

然而,如上所述,如果X射线管单元41的重心位置从转轴N方向上的平板部48的位置错位的话,那么旋转部40高速旋转时,作用于各旋转部单元的离心力F的分力Fl将作为弯矩作用于旋转基体52 的保持位置,往往造成平板部48变形。 However, as described above, if the position of the center of gravity of the X-ray tube unit 41 is displaced from the position on the flat plate portion 48 of the rotating shaft direction N, then the rotating portion 40 is rotated at high speed, a centrifugal force acting on each rotary unit portion F of a component force Fl the holding position as the bending moment on the rotating base 52, often resulting in deformation of the flat plate portion 48. 同样离心力还作用于X射线检测单元42及其他的旋转部单元,往往造成平板部48变形。 Also centrifugal force also acts on the X-ray detection unit 42 and the other portion of the rotating unit, often resulting in deformation of the flat plate portion 48. 正如特开平2000-116641号^^艮所述那样,各旋转部单元安装在滚筒部49的内侧时,同样平板部48也会产生变形,只是变形量不同而已。 Laid-Open No. 2000-116641 as the Gen ^^ above, each of the rotary unit when the unit is mounted inside of the drum portion 49, the same flat plate portion 48 will be deformed, but the deformation amount is different. 由于该离心力F造成平板部48变形的缘故,所以很难确保高速旋转时X射线穿透面位置的精度。 Since the centrifugal force F caused by deformation of the flat plate portion 48 of the reason, it is difficult to ensure accuracy in high-speed rotation of the surface position of X-ray transmission.

因此,为了能够用X射线检测单元42进行高精度的检测,有时也采用增加X射线穿透面的对应方法,但是这同时也增加了^皮检体的照射量。 Accordingly, in order to enable accurately detecting the X-ray detection unit 42, a corresponding method may also be employed to increase the surface of the X-ray transmission, but it also increases the exposure of the subject transdermal ^. 此外,平板部48的变形程度较大时,很有可能引起旋转基体52的破坏及CT值变化引起CT图像异常等问题。 Further, when the large deformation of the flat plate portion 48, and is likely to cause damage CT value change caused by the rotating base 52 issues abnormal CT image.

另一方面,为了能够使运动物例如心脏等静止下来进行观察,要求缩短摄影时间即希望更高速旋转进行摄影,但是更高速旋转将会增加上述的变形。 On the other hand, in order to enable the movement thereof to rest, for example, such as the heart is observed, i.e., the requirements to shorten the imaging time desired higher speed rotation of photography, but more high-speed rotation of the above modification will increase.

此外,还要求能够一边改变转速一边进行摄影。 Further, while capable of changing the rotational speed required while photographing. 改变转速的话, 离心力变化,所以变形量也随着转速变化而变化。 Change the speed, then, changes the centrifugal force, the deformation amount as the speed changes. 为此,担心变形量变化引起CT图像进一步产生异常。 For this reason, the amount of deformation changes caused fear further abnormal CT image.

另外,虽然还考虑增加平板部48的厚度以提高强度,但是旋转基体52通常是由铝铸件制作,局部增加厚度的话,铸液流动及冷却会出现问题,例如,担心产生内部应力,或者形状精度劣化。 Further, although consider increasing the flat portion thickness 48 to increase the strength, but the rotation base 52 is typically made of aluminum casting, locally increased thickness, then casting fluid flow and cooling occur problems, for example, fear of generating internal stresses or shape accuracy deterioration. 另一方面, 对包括滚筒部49在内的整体加厚的话,那么重量加重,由此还需要使驱动电机大型化,从而存在着装置庞大的问题。 On the other hand, the overall thickened portion 49 includes a drum including, then the increase in weight, thus also the size of the drive motor need, so that there is a huge problem in the apparatus.

再有,由于旋转基体52加固方法的原因,有时会降低上述维修时的作业性。 Further, due to the reinforcing method of the rotating base 52, may deteriorate the workability during maintenance.

5发明内容 5 SUMMARY OF THE INVENTION

本发明提供即使旋转基体高速旋转,X射线和检测器的设置角度 The present invention provides a set angle even if the rotating base rotates at high speed, X-ray detector and

也不会偏移,且画质难以劣化的x射线计算机断层摄影装置。 Not offset, image quality is hardly deteriorated and x-ray computed tomography apparatus.

本发明提供不会使装置大型化,且可加固旋转基体的x射线计算 The present invention provides does not make the size of the apparatus, x-ray and calculate the rotation matrix can be reinforced

机断层摄影装置。 Machine tomography apparatus.

本发明的x射线计算机断层摄影装置,构成如下。 x-ray computed tomography apparatus according to the present invention, configured as follows. (1) x射线计算机断层摄影装置,具备可以以转轴为中心旋转地支撑的筒型旋转基体、搭载在上述旋转基体上的x射线管、搭载在上述旋转基体上的x射线检测器、固定在上述旋转基体轴心方向的端部 (1) x-ray computed tomography apparatus includes a can shaft as the cylindrical rotating base center rotatably supported mounted x-ray tube on the rotating base, equipped with an x-ray detector on the rotatable base, fixed an end portion of the axial direction of the rotating base

上且刚性比上述旋转基体大的加固环。 And the rigid reinforcing ring than the rotating base.

(2 )在(1)所述的X射线计算机断层摄影装置中,上述X射线管及上述X射线检测器,被配设在从上述旋转基体轴心方向中心部向相同一侧偏置的位置上,上述加固环被设在上述旋转基体的轴心方向端部中靠近上述X射线管及上述X射线检测器的端部。 (2) X-ray computer tomography apparatus (1) in the X-ray tube and the X-ray detector is disposed offset from the rotation axis direction of the central base portion side in the same position on the reinforcement ring is provided in the axial direction of the rotating base end portion near the end portion of the X-ray tube and the X-ray detector.

(3) 在(1)所述的X射线计算机断层摄影装置中,上述加固环被固定在上述旋转基体的端面上。 (3) X-ray computer tomography apparatus (1) according to the above-mentioned reinforcing ring is fixed to the end surface of the rotatable base.

(4) 在(1)所述的X射线计算机断层摄影装置中,上述加固环被固定在上述旋转基体外侧的周面。 (4) X-ray computer tomography apparatus (1) according to the above-mentioned reinforcing ring is fixed to the outer circumferential surface of the rotating substrate.

(5) 在(1)所述的X射线计算机断层摄影装置中,上述加固环可由铁、不锈钢以及钛中任何一个材料制作。 (5) X-ray computer tomography apparatus (1) according to the above-mentioned reinforcing ring may be made of iron, stainless steel, titanium and any material.

(6) X射线计算机断层摄影装置,具备可以以转轴为中心旋转地支撑的筒型旋转基体、搭载在上述旋转基体上的X射线管、搭载在上述旋转基体上的X射线检测器、由刚性比上述旋转基体大的材料制作且被安装在上述旋转基体端部上以抑制上述旋转基体挠曲的加固构件。 (. 6) X-ray computed tomography apparatus includes a can around the rotation axis rotatably supported cylindrical rotating base mounted X-ray tube on the rotating base, equipped with an X-ray detector on the rotatable base, a rigid is larger than the rotation of the base material and mounted on said rotary base end portion of the reinforcing member to suppress the deflection of the rotating base.

(7 )具有为取得被检体X射线断层图像而旋转的旋转部的X射线计算机断层摄影装置,上述旋转部具备含有以该旋转部的转轴为中心的环状平板和在上述平板外周端侧所形成的圆筒的旋转基体、在上述平板任何一方的表面侧向上述被检体照射x射线的x射线管、在上述平板另一方的表面侧安装在上述旋转基体上且与上述旋转基体共同构成双重结构的加固构件。 (7) has to acquire an X-ray computed tomography apparatus rotating portion of the subject X-ray tomographic image is rotated, the rotating portion includes a containing the rotary shaft of the rotary portion as a center of the annular plate and on the outer plate peripheral end rotating base cylinder formed in the flat plate of any one surface side of the subject irradiated with x-rays of the x-ray tube, the surface side of the plate other is mounted on the rotating base and the rotating base together the reinforcing member constituting a double structure.

(8) 在(7)所述的X射线计算机断层摄影装置中,上述加固构件,相对于上述旋转基体,在该旋转基体的外周端附近及内周端附近被接合。 (8) X-ray computed tomography apparatus according to (7), the reinforcement member with respect to the rotating base, and is engaged in the vicinity of the end near the outer periphery of the inner peripheral end of the rotatable base.

(9) 在(7)所述的X射线计算机断层摄影装置中,在上迷加固构件和上述平板之间具有空洞部。 (9) X-ray computed tomography apparatus according to (7), between the reinforcing member and said fan plate has a hollow portion.

(10) 在(7)所述的X射线计算机断层摄影装置中,上迷加固构件是环状。 (10) (7) of the X-ray computed tomography apparatus, the reinforcement member is an annular fan.

(11) 在(7)所述的X射线计算机断层摄影装置中,上述X射线管被安装在上述圆筒的内周面。 (11) X-ray computed tomography apparatus according to (7), the X-ray tube is mounted in the inner circumferential surface of the cylinder.

利用本发明的X射线计算机断层摄影装置,即使旋转基体高速旋转时,X射线管和检测器的设置角度也不会偏移,难以引起画质劣化。 X-ray computed tomography apparatus according to the present invention, even when the rotating base rotates at high speed, provided the angle of the X-ray tube and the detector will not shift, it is difficult to cause deterioration of image quality. 并且不需要使装置大型化。 And does not require that the size of the device.

本发明的其他目的和优点记载在以下的说明书中,并由说明书的说明及本发明的实施而变得更加清楚,尤其是可以通过下述的手段或组合加以理解和获得。 Other objects and advantages of the present invention are described in the following specification, and by the described embodiment of the present invention will become more apparent from the description, in particular, can be realized and attained by the following means or a combination.

附图简单说明 BRIEF DESCRIPTION

图l是本发明第一实施方式的X射线CT装置的立体图。 Figure l is a perspective view of an X-ray CT apparatus according to the first embodiment of the present invention. 图2是该实施方式的台架的概略图。 FIG 2 is a schematic view of the gantry of this embodiment. 图3是该实施方式的旋转基体的立体图。 FIG 3 is a perspective view of a rotating basic body of this embodiment. 图4是该实施方式的旋转基体的侧剖面图。 FIG 4 is a side sectional view of the rotational matrix of this embodiment. 图5是该实施方式变形例的旋转基体的侧剖面图。 FIG 5 is a side sectional view of a rotary base according to the modified embodiment. 图6是表示本发明第二实施方式的X射线CT装置外观构成的图。 FIG 6 is a diagram showing the appearance of an X-ray CT apparatus of the second embodiment of the present invention is constituted. 图7是表示该实施方式的X射线CT装置构成的方块图。 FIG 7 is a block diagram showing an X-ray CT apparatus of this embodiment is constructed. 图8是表示设于该实施方式的X射线CT装置台架内的旋转部构成的立体图。 8 is a perspective view of a rotary portion in this embodiment is provided in the X-ray CT gantry configuration. 图9是表示设于该实施方式的X射线CT装置台架内的旋转部构成的立体图。 9 is a perspective view of a rotary portion in the configuration of the embodiment represented is provided an X-ray CT apparatus gantry.

图10是表示设于该实施方式的X射线CT装置台架内的旋转部构成的剖面图。 FIG 10 is a sectional view of a rotary portion in this embodiment is provided in the X-ray CT gantry configuration.

图ll是表示设于现有的X射线CT装置台架内的旋转部构成的剖面图。 Fig ll is a cross-sectional view of a rotary portion provided in the configuration of a conventional X-ray CT gantry.

具体实施方式(第一实施方式) DETAILED DESCRIPTION (First Embodiment)

首先, 一边参照图1—图5, 一边就本发明的第一实施方式进行i兌明。 First, with reference to Figures 1-5, while for i it out against a first embodiment of the present invention.

图1是本发明第一实施方式相关的X射线CT装置的立体图。 FIG 1 is a perspective view showing a first embodiment of the present invention, an X-ray CT apparatus.

如图1所示,X射线CT装置,具备向被检体照射X射线,并根据穿透该被检体的X射线取得被检体多个断面中的图像信号的台架20、控制台架20动作的同时根据由台架20取得的图像信号以生成被检体多个断面中的诊断图像的控制装置30、把被检体定位在台架20的摄影位置上的卧台10。 1, the X-ray CT apparatus comprising an X-ray is irradiated to the subject, and 20 is achieved, the gantry carriage plurality of image signals in accordance with the subject cross-sectional X-ray penetrating the body of the subject 20 while the control device 30 according to the operation of a plurality of cross-sectional image diagnostic image signal obtained by the stage 20 to generate the subject, the subject is positioned in the photographing position of the carriage 20 on the bed 10.

本实施方式的重要要素是设于台架20内的旋转基体11。 Important elements of the present embodiment is provided on the rotating gantry 20 of the base body 11 因此,在以下说明中,省略本实施方式中不太重要的部分,例如壳体等部分的说明。 Thus, in the following description are omitted less important part of the present embodiment, the portion of the housing and the like for example described. 此外,在本实施方式的说明中,"前"表示图1中的前侧,"后,,表示图1中的后侧。 Further, in the description of the present embodiment, the "front" represents the front side in FIG. 1, the "rear ,, represented in FIG.

图2是该实施方式相关的台架20的概略图。 FIG 2 is related to the embodiment of FIG. 20 is a schematic stage.

如图2所示,该台架20具备摄影时放入被检体的摄影口5,在台架20内侧,为了包围摄影口5且与摄影口5同轴,配设了筒状的旋转基体ll。 As shown, the gantry rotating substrate is placed in the mouth 5 photographic subject, inside the gantry 20, to port 5 and the bracket shooting photography coaxial port 5, is provided with a tubular 20 includes a photographic 2 ll. 该旋转基体11可以利用配设在台架20内的驱动机构,以该旋转基体11的轴心为中心高速旋转。 The rotating base 11 by the driving mechanism may be disposed in the gantry 20 to the axial center of the rotating base 11 is rotated at high speed center.

图3是该实施方式相关的旋转基体ll的立体图,图4是该实施方式相关的旋转基体11的侧剖面图。 FIG 3 is a perspective view of the rotating base ll embodiment related to the embodiment, FIG. 4 is a side sectional view showing the embodiment of the rotating base 11 of the embodiment.

如图3和图4所示,该旋转基体ll,如前所述,为圆筒状,其内侧固定了向被放入摄影口5中的被检体照射X射线的X射线管单元12、检测穿透被检体的X射线的X射线检测单元13、以及产生加在X射线管单元12上的高电压的电源单元14。 As shown in FIGS. 3 and 4, the rotating base ll, as described above, a cylindrical shape, which is fixed to the inner mouth 5 is placed in photography is irradiated with X-rays of the X-ray tube unit 12, detecting X-rays penetrate the object being X-ray detection unit 13, and a power generation unit is applied to the X-ray tube 12 a high voltage unit 14. 这些X射线管单元12、 X射线检测单元13以及电源单元14,重量很重,是所谓的重物。 The X-ray tube unit 12, X-ray detection unit 13 and a power supply unit 14, heavy weight, so-called weight. 旋转基体ll的材料,使用的是铝材等。 Ll of the rotating base material, aluminum and the like is used.

X射线管单元12,被固定在旋转基体11内周面偏向上述旋转基体11轴心方向中心部稍靠前的位置上。 X-ray tube unit 12 is fixed to the inner peripheral surface of the rotating base 11 toward the rotation axial direction of the central base portion 11 slightly higher position. 因此,X射线管单元12的重心,偏向旋转基体ll的前方。 Thus, the focus of the X-ray tube unit 12 toward the front of the rotating base ll. 旋转基体11和X射线管单元12使用螺栓固定。 Rotating base unit 11 and the X-ray tube 12 bolted.

X射线检测单元13,被固定在设于旋转基体11内周面的安装构件llb的前面。 X-ray detection unit 13, is fixed to the mounting member is provided on the front 11 of the circumferential surface llb of the rotating base. 安装构件llb,被配置在旋转基体ll轴心方向略靠中心部的位置。 Mounting member llb, are arranged in the axial direction of the rotating base ll position slightly center portion. 因此,被固定于安装构件llb前面的X射线检测单元13和上述X射线管单元12的重心,都偏向旋转基体11的前方。 Therefore, the foregoing is fixed to the mounting member LLB focus X-ray detection unit 13 and the X-ray tube unit 12 are swung forward rotation of the base 11. 安装构件lib和X射线检测单元13以及安装构件lib和电源单元14的固定都使用螺栓。 Stationary mounting member lib and X-ray detection unit 13 and the mounting member lib and the power supply unit 14 are bolts.

在旋转基体ll的前端面,固定了与上述旋转基体11同轴的加固环15。 The front end surface of the rotating base ll, coaxially fixed to the rotating base 11 of the reinforcing ring 15. 加固环15含有多个例如四个圆弧状的构件15a。 Reinforcing ring 15 contains a plurality of, for example, four arcuate member 15a. 因此,与用一个构件构成加固环15的情况相比,制造非常简化。 Thus, with a member constituting the reinforcing ring 15 as compared to the case, producing very simplified. 但是,本发明相关的加固环15,并不限于此,也可以是一个环状的构件。 However, the present invention is related to the reinforcing ring 15 is not limited thereto, and may be an annular member.

加固环15前端面,被配置了固定环16。 Strengthening the front end surface of the ring 15, the fixing ring 16 is arranged. 固定环16含有多个例如四个圆弧状的固定构件16a。 Fastening ring 16 comprises a plurality of, for example, four arcuate fixing member 16a. 各固定构件16a被配置成能够覆盖构成加固环15的圆弧状构件15a的接缝,以用螺栓连结相邻的加固环15。 Each fixing member 16a is arranged to cover the seam arcuate member 15a constituting the reinforcing ring 15, by bolting to an adjacent reinforcing ring 15. 使用螺栓(图中未显示)把加固环15固定在旋转基体ll上。 Using bolts (not shown) on the reinforcing ring 15 is fixed to the rotating base body ll. 该螺栓,也可以与用于连结上述加固环15的螺栓共用。 The bolt, the bolt may be connected to the common ring 15 and the reinforcement used. 加固环15的材料可以使用刚性比铝高的材料,比如铁、不锈钢或钛等。 Reinforced by a rigid ring 15 may be higher than aluminum material, and the like such as iron, stainless steel or titanium. 此外,还可以在固定环16的前端面再配设其他的固定环(图中未显示)。 In addition, also be matched with other fixing ring provided at a front end surface of the fixed ring 16 (not shown).

以下,就具备以上构成的X射线CT装置的动作和作用进行说明。 Hereinafter, the operation and effect provided to the X-ray CT apparatus of the above configuration will be described.

旋转基体ll高速旋转的话,配设于其内侧的X射线管单元12、X射线检测单元13、电源单元14等重物产生很大的离心力,旋转基 Ll rotating base rotates at high speed, then the inside thereof is provided with an X-ray tube unit 12, X-ray detection unit 13, a power supply unit 14 and the like have a great weight centrifugal force, the rotating base

9体11的前端部受到扩展的力作用。 9 the distal end portion 11 extended by force.

可是,本实施方式中的旋转基体11的前端面固定了加固环15。 However, in this embodiment the front end face of the rotating base 11 is fixed to the reinforcing ring 15. 并且加固环15的材料使用刚性比旋转基体11的材料高的铁、不锈铜或钛。 Material and the reinforcing ring 15 of rigid material 11 of high iron, copper, stainless steel or titanium than the rotation matrix.

因此,即使旋转基体ll的前端部有试图扩展的较大的力作用,依靠加固环15的刚性,旋转基体ll也不会变形。 Accordingly, even when the distal end portion of the rotating base ll have a greater force attempting to expand, relying on the rigidity of the reinforcing ring 15, rotation of the base body ll is not deformed. 结果,配设于旋转基体11内侧的X射线管单元12及X射线检测单元13的设置角度保持一定,旋转基体11即使高速旋转时,也可以生成稳定鲜明的诊断图像。 As a result, the inner rotor disposed on the base unit 11 is provided an X-ray tube 12 and the angle X-ray detection unit 13 is kept constant, even during high speed rotation of the rotary 11 matrix can be generated stably sharp diagnostic images.

并且,由于只是安装加固环15,所以现有的、未装备加固环15的X射线计算机断层摄影装置,也可以简单地加装加固环。 Further, since only the reinforcing ring 15 is mounted, so that the conventional, non-X-ray computed tomography apparatus equipped with the reinforcing ring 15, can simply install reinforcing ring. 也就是i兑,即使是以旋转基体11低速旋转为前提的X射线计算机断层摄影装置,只要安装加固环15,就可以适应旋转基体11的高速旋转。 I.e. against i, even if the rotating base 11 is rotated at low speed premised X-ray computed tomography apparatus, as long as the reinforcing ring 15 is mounted, it can be adapted to high speed rotation of the rotary base 11.

下面, 一边参照图5, —边就本实施方式的变形例相关的加固环17进行说明。 Next, with reference to FIG. 5, - on the edge of the reinforcing ring modification example of the embodiment according to the present embodiment 17 will be described.

图5是该实施方式变形例相关的旋转基体11的側剖面图。 FIG 5 is a side sectional view of the rotating base 11 associated with the modified embodiment.

如图5所示,本实施方式中的加固环17,被固定在旋转基体11的前端外周面。 5, the reinforcing ring 17 of the present embodiment, is fixed to the outer circumferential surface of the distal end 11 of the rotating base. 也就是说,加固环17,被嵌入旋转基体11的外侧。 That is, the reinforcing ring 17 is embedded in the outer rotor 11 of the base body.

加固环17含有多个例如四个圆弧状的构件17a。 Reinforcing ring 17 comprises a plurality of, for example, four arcuate member 17a. 因此,与用一个构件构成加固环17的情况相比,制造非常简化。 Thus, with a member constituting the reinforcing ring 17 as compared to the case, producing very simplified. 但是,本发明相关的加固环17,并不限于此,也可以是一个环状的构件。 However, the present invention is related to the reinforcing ring 17 is not limited thereto, and may be an annular member.

加固环17前端面,配置了固定环18。 Strengthening the front end surface of the ring 17, the fixing ring 18 disposed. 固定环18含有多个例如四个圆弧状的固定构件18a。 E.g. fixing ring 18 includes a plurality of arcuate four fixing member 18a. 各固定构件18a被配置成能够覆盖构成加固环17的圆弧状构件17a的接缝,以用螺栓连结相邻的固定构件18a。 Each fixing member 18a is arranged to cover the seam arcuate member 17a constituting the reinforcing ring 17, fixed to the adjacent coupling bolt member 18a. 使用螺栓(图中未显示)把加固环17固定在旋转基体11上。 Using bolts (not shown) the reinforcing ring 17 is fixed on a rotating base 11. 此外,在本实施方式中,固定环18虽然被配置在加固环17的前端面,但是也可以固定在例如加固环17的外周面。 In the present embodiment, the outer circumferential surface of the fixing ring 18 is disposed on the front end surface while the reinforcing ring 17, but may be fixed at, for example, the reinforcing ring 17. 加固环17的材料可以使用刚性比铝高的材料,比如铁、不锈钢或钛等。 Reinforced by a rigid ring 17 may be higher than aluminum material, and the like such as iron, stainless steel or titanium. 另外,还可以在固定环18的前端面再配设其他的固定环(图中未显示)。 Further, it may also be matched with other fixing ring is provided at a front end surface of the fixed ring 18 (not shown).

这样,加固环17被固定在旋转基体11的外周面上的话,加固环17的安装将简化。 Thus, reinforcement of the outer peripheral surface of the ring 11 fixed to the rotating base 17, then, the reinforcing ring 17 is mounted will be simplified. 此外,旋转基体11和加固环17的固定使用较小强度的螺栓即可。 Further, the rotating base 11 and the reinforcing ring 17 is fixed with bolts to a smaller strength.

此外,在上述实施方式中,加固环15、 17的材料,虽然使用铁、 不锈钢及钛,但是本发明并不限于此,只要刚性高于旋转基体11的材料的话,则什么材料都可以。 Further, in the above embodiment, the ring of material 15, reinforcement 17, although the use of iron, stainless steel and titanium, but the present invention is not limited to this, higher rigidity than the material of the rotating base 11, then the material can be anything. 因此,加固环15、 17的材料,可根据旋转基体11的材料选定。 Thus, the material reinforcing ring 15, 17 can be selected depending on the material of the rotating base 11.

而且,在上述实施方式中,加固环15、 17被设于旋转基体11的前端。 Further, in the above-described embodiment, the reinforcing ring 15, 17 is provided at the front end 11 of the rotating base. 可是,X射线管单元12、 X射线检测单元13、电源单元14的重心偏向旋转基体11的后方的话,则加固环15、 17被设于旋转基体11的后端。 However, X-ray tube unit 12, X-ray detection unit 13, the center of gravity toward the rear of the power unit 14 of the rotating base 11, then the reinforcing ring 15, 17 is provided at the rear end 11 of the rotating base. 当然,也可以不取决于X射线管单元12、 X射线检测单元13、电源单元14的重心位置,在旋转基体11的前端和后端设置加固环15、 17。 Of course, it may not depend on the X-ray tube unit 12, X-ray detection unit 13, the position of the center of gravity of the power unit 14, the front and rear ends 11 disposed on the rotating base reinforcement ring 15, 17.

进而,在上述实施方式中,旋转基体11和X射线管单元12的固定、旋转基体11和X射线检测单元13的固定、旋转基体11和电源单元14的固定以及旋转基体11和加固环15*17的固定,使用螺栓。 Further, in the above embodiment, the rotating base 11 and the X-ray tube unit is fixed, the rotating base 12 is 11 and the X-ray detection unit is fixed, the rotation base 11 and the power supply unit is fixed, and the rotation base 13 14 11 and the reinforcing ring 15 * 17 is fixed using a bolt. 然而,本发明并不限于此,只要能牢固地固定在旋转基体ll上,也可以是其他的手段。 However, the present invention is not limited to this, can be firmly fixed to the rotating base ll, it may be other means.

(第二实施方式) (Second Embodiment)

以下, 一边参照图6—图10, 一边就本发明的第二实施方式进行说明。 Hereinafter, with reference to FIGS. 6 to 10, while a second embodiment will be described embodiment of the present invention.

图6是表示本实施方式X射线CT装置的外观构成的图,图7是表示本实施方式X射线CT装置的构成的方块图,图8、图9是表示设于本实施方式X射线CT装置台架内的旋转部构成的立体图,图10 是表示本实施方式旋转部40构成的剖面图。 FIG 6 is a diagram showing an outer appearance of the present embodiment, the X-ray CT apparatus configuration, FIG. 7 is a block diagram showing the configuration of the present embodiment, the X-ray CT apparatus, FIG. 8, FIG. 9 is a apparatus showing provided in the present embodiment the X-ray CT a perspective view of a rotating gantry portion in the configuration of FIG. 10 is a sectional view according to the present embodiment, the rotary portion 40 thereof.

在图6中,本实施方式的X射线CT装置,具备为装载患者等被检体(图中未显示)的卧台10、具有为插入被检体以照射X射线的摄影口5且由台架21覆盖的台架20、对整个X射线CT装置的动作进行控制的控制装置30。 In FIG 6, X-ray CT apparatus according to the present embodiment is provided with to the load such as a patient specimen (not shown) in the bed 10, having to be inserted into the subject to irradiate the X-ray photographing opening 5 and consists of units covering the frame 21 the stage 20, the operation of the entire X-ray CT apparatus 30 controls the control device.

在取得被检体的X射线CT图像时,要利用驱动单元61使卧台 When obtaining the X-ray CT image of the subject, to the drive unit 61 so that a bed

ii10接近台架20,并把装栽在卧台10上的被检体插入台架20的摄影口5中。 ii10 close stage 20, and the subject being planted mounted on the bed 10 is inserted into the gantry opening 520 of photography. 台架20内设有旋转部40,如图8所示,旋转部40内具备产生X射线的X射线管单元41、为了检测从X射线管单元41射出且穿透被检体的X射线而夹被检体并与X射线管单元41相对配置的X射线检测单元42、对由X射线检测单元42检测出的信号进行放大的信号放大单元43、与X射线管单元41相邻而设且对X射线管单元41进行冷却的冷却单元44、为向X射线管单元41提供管电压(管电流) 的电源单元45.46、控制电源单元45'46的电源控制单元47(以下,把这些各单元统称为旋转部单元)。 20 features a rotating gantry portion 40, as shown, the X-ray tube comprising an X-ray generation unit 408 of the rotating portion 41, in order to detect light emitted from the X-ray tube unit 41 and the X-rays penetrate the object being folder X-ray detection unit with the subject and the X-ray tube 42 disposed opposite unit 41, the signal amplifying means for amplifying a signal detected by the X-ray detection unit 4243, the X-ray tube unit 41 disposed adjacent to and X-ray tube for a cooling unit 41 for cooling the unit 44, to provide a tube voltage (tube current) to the X-ray tube unit 41 power supply unit 45.46, controls the power supply unit 45'46 power supply control unit 47 (hereinafter, these units means collectively rotating portion).

如图7所示,控制装置30,具备为取得X射线CT图像而需要输入各种命令的输入单元31、显示取得X射线CT图像所必要的信息及取得的X射线CT图像等的显示单元32、存储取得X射线CT图像所必要的信息及取得的X射线CT图像等的存储单元33、对X射线CT 装置的各单元的动作进行控制的系统控制单元34。 The display unit shown in FIG, 7 the control device 30 includes an X-ray CT image to obtain the required input various commands input unit 31, displays the X-ray CT image to obtain the necessary information and the like to obtain an X-ray CT image is 32 system memory to obtain an X-ray CT image and the acquired information necessary for X-ray CT image or the like of the storage unit 33, the operation of each unit of the X-ray CT apparatus for controlling the control unit 34.

此外,旋转部40通过旋转控制单元50的控制由驱动电机51驱动旋转。 Further, the rotation control unit 40 by the rotation control unit 50 is driven to rotate by a drive motor 51. 由此,旋转部40绕被检体的周围高速旋转。 Accordingly, the rotation portion 40 is rotated at high speed around the periphery of the subject. 此外,旋转部40 的转速例如大于等于l秒/转、特别是大于等于0.5秒/转。 Further, the rotational speed of the portion 40, for example, not less than l s / revolution, in particular greater than or equal to 0.5 sec / revolution. 也就是说, 为了得到被检体的X射线CT图像,旋转部40为绕被检体的周围转一周所需时间小于等于l秒,特别是小于等于0.5秒。 That is, in order to obtain X-ray CT image of the body of the subject, the rotating portion 40 is about one revolution around the object desired time in seconds l or less, especially 0.5 or less seconds.

在取得被检体的X射线CT图像时,旋转部40绕被检体的周围转一周过程中,通过电源控制单元47的控制由电源单元45.46向X射线管单元41供应规定的管电压(管电流),由此X射线从X射线管单元41照射^皮检体,穿透被检体的X射线被X射线检测单元42检测。 When acquiring the X-ray CT image of the subject, the rotation portion 40 about the procedure around the object of revolution of the control tube voltage of a predetermined power supply unit 45.46 supplied to the X-ray tube unit 41 by a (tube through the power supply control unit 47 current), whereby X-rays from the X-ray tube unit 41 ^ irradiated skin of the subject, been penetrating X-ray detection unit 42 detects the X-ray detectable body. 有关由X射线检测单元42检测的X射线的检测信号,由信号放大单元43放大,并被供应给系统控制单元34。 For X-rays by the X-ray detection unit 42 detects a signal, the signal amplified by the amplifying unit 43, and is supplied to the system control unit 34. 系统控制单元34,根据该检测信号进行规定的图像再合成处理等以取得X射线CT图像,取得X射线CT图像显示在显示单元32中,并存储在存储单元33中。 The system control unit 34, an image of the predetermined detection signal resynthesis processing to obtain an X-ray CT image, to obtain X-ray CT image displayed on the display unit 32, and stored in the storage unit 33.

以下,使用图8至图10,就本实施方式的旋转部的详细构成进行说明。 Hereinafter, using FIGS. 8 to 10, will be described in detail rotating portion constituting the present embodiment. 此外,在本实施方式的说明中,把旋转部40的卧台侧作为"前面",把相反侧作为"背面"。 In the description of the present embodiment, the rotation of the bed-side portion 40 as the "front," the opposite side as "rear surface." 因此,图8所示的立体图是从前面侧看的立体图,图9所示的立体图是从背面侧看的立体图。 Thus, as shown in perspective view in FIG. 8 is a perspective view viewed from the front side, shown in perspective in FIG. FIG. 9 is a perspective view viewed from the back side. 此外,在图8中省略了旋转部40的背面侧。 In addition, the back surface side of the rotating portion is omitted in FIG 40.

旋转部40,如图8所示,例如由铝铸件制作,前面側具备以转轴N (参照图10)为中心绕被插入摄影口5中的被检体的周围旋转的环状的平板部(平板)48。 Rotating portion 40, as shown in FIG. 8, for example made of aluminum casting, the front side of the rotary shaft includes N (see FIG. 10) is rotated centering around a ring around the subject photographic insertion opening in the flat plate portion 5 ( plate) 48. 而且,在平板部48的外周端,形成与环状同轴且比平板部48转轴N方向的宽度(板厚)更宽的滚筒状的滚筒部(圆筒)49,滚筒部49如图10所示,从平板部48的前面側到背面侧形成,平板部48和滚筒部49的接合部分其断面为T字型。 Further, the outer peripheral end flat plate portion 48 is formed coaxially with the annular shaft 48 than the width direction of the flat plate portion N (thickness) of the drum-shaped wider portion of the cylinder (cylinder) 49, 10 of the drum unit 49 in FIG. shown, is formed from the front to the back plate portion 48 side plate portion 48 and the engaging portion of the drum portion 49 which is T-shaped cross section. 以下,把平板部48和滚筒部49 一起统称为旋转基体52。 Hereinafter, the flat plate portion 48 and the drum portion 49 together referred to as the rotating base 52.

而且,与平板部48的转轴N成直角的旋转直径方向(参照图10 ) 的长度,换言之即环状的宽度,至少具有可安装X射线检测单元42 的长度。 Further, the length of the flat plate portion 48 with the shaft at right angles to the rotation N of the diameter direction (see FIG. 10), in other words the width of the annular, having a length of at least X-ray detection unit 42 is mounted to. 并且,平板部48的前面侧,作为上述旋转部单元的X射线管单元41、 X射线检测单元42、信号放大单元43、冷却单元44、电源单元45.46以及电源控制单元47使用图中未显示的固定螺栓等安装。 Further, the front side flat plate portion 48, an X-ray tube unit of the rotary part means 41 is, the X-ray detection unit 42, a signal amplifying unit 43, the cooling unit 44, a power supply unit 45.46 and a power supply control unit 47 use not shown in fixing bolts or the like is mounted. 此外,滚筒部49的圆筒的转轴N方向的宽度,以被安装在平板部48上的上述各单元在转轴N方向未从滚筒部49圆筒鼓出的宽度为宜。 In addition, N-direction width of the cylindrical shaft portion 49 of the drum, in each unit is mounted on the plate portion 48 is preferably in the width direction of the rotation axis N is not bulged portion 49 from the drum cylinder. 另外,X射线管单元41,被配置成能够相对平板部48在离开转轴N方向的位置且平行地形成X射线的穿透面。 Further, the X-ray tube unit 41, is arranged an X-ray flat plate portion and is formed parallel to the plane of penetration away from the shaft 48 at a position so as to be opposite the N-direction. 再有,如〔背景技术〕 所述,由于X射线产生装置附近配置了转动体(阳极)及为对泄漏X 射线进行屏蔽的防护铅等重物,所以X射线管单元41的重心往往位于X射线产生位置附近。 Further, as the Prior Art, since the X-ray generating means arranged near the rotatable member (anode) and X-rays for the leakage protective shield lead weight, center of gravity of the X-ray tube unit 41 is often located on the X rays generated near the position. 也就是说,本实施方式中,X射线管单元41 的重心相对平板部48在转轴N方向也处于离开X射线穿透表面侧的位置。 That is, in this embodiment, the center of gravity of the X-ray tube unit 41 relative to plate portion 48 in the rotating axis N direction is also in a position away from the side surface of the X-ray transmission.

此外,如图9、图10所示,在旋转基体52上,平板部48的背面侧,安装了加固构件25,并与旋转基体52共同构成双重结构。 Further, in FIG. 9, FIG. 10, on a rotating base 52, the back side of the flat plate portion 48, the reinforcing member 25 is installed, and the rotating base 52 together form a double structure. 加固构件25,例如由铝铸件制作,在本实施方式中,作为一个例子为与平板部48具有同样环状且具有L字型断面。 The reinforcing member 25, for example made of aluminum castings, in the present embodiment, as an example of a flat plate having the same annular portion 48 and an L-shaped cross-section. 另外,加固构件25的旋转直径方向的长度,具有与平板部48的旋转直径方向的长度几乎相同的长度。 Further, the length of the rotation direction of the diameter of the reinforcing member 25 having the longitudinal direction of the rotation diameter of the flat plate portion 48 of substantially the same length. 而且,加固构件25,在旋转基体52的外周端附近的位置的多个安装部101上使用图中未显示的固定螺栓等从背面侧接合在滚筒部49,此外,如图8所示,在旋转基体52的内周端附近的位置的多个安装部102上使用图中未显示的固定螺栓等从前面侧接合在平板部48。 Further, the reinforcing member 25, fixing bolts or the like not shown in the engagement portion 49 from the back side of the drum using a plurality of mounting portions 101 on a position in the vicinity of the rotating base 52 of the outer peripheral end of the addition, 8, in not shown in FIG plurality of mounting portions 102 on a position in the vicinity of the inner peripheral end of the rotating base 52 of the fixing bolts or the like from the front side flat plate portion 48 engages. 另外,加固构件25和平板部48之间具有空洞部26。 Further, the reinforcing member having a cavity portion 26 between the portion 25 and the plate 48. 这样,由于可以安装加固构件25,所以与转轴方向成直角的断面二次力矩变大,增力口了向转轴N方向弯曲的强度。 Thus, since the reinforcing member 25 may be mounted, so that the rotary shaft at right angles to the sectional secondary moment is increased, the opening force is bent by the rotation axis N direction strength. 此外,由于形成空洞部26,减小了重量的增加,并且与只沿着平板部48安装相比,断面二次力矩变大,进一步增加了强度。 Further, since the hollow portion 26, reduced weight gain, as compared with the mounting plate portion 48 only along the cross section moment of inertia becomes large, the strength is further increased.

再有,在本实施方式中,作为一个例子,通过加固构件25与轴承保持部24共同夹持轴承91,从而旋转部40可以介于轴承91自由旋转地保持在框架23上。 Further, in the present embodiment, as an example, by the reinforcing member 25 and the bearing holding portion 24 sandwiches the bearing 91, thereby rotating portion 40 can be interposed between the bearing 91 is rotatably held on the frame 23.

在这种构成中,旋转基体52以转轴N为中心旋转,X射线管单元41绕被插入摄影口5中的被检体的周围旋转。 In this configuration, the rotating base 52 is rotated about the rotary shaft N, X-ray tube unit 41 is rotated about the subject around the insertion opening 5 in the photography. 这时,如〔背景技术〕 所述,在离开转轴N的方向(朝外)离心力作用于X射线管单元41 的重心,离心力F的分力作为试图把平板部48向转轴N方向变形的弯矩作用。 At this time, as described in Prior Art, N in a direction away from the rotation axis (outwardly) a centrifugal force acts on the center of gravity of the X-ray tube unit 41, a component force of the centrifugal force F as the flat plate portion 48 attempts to bend the deformed shaft direction N moments effect. 可是,如上所述,由于加固构件25,旋转基体52提高了强度,所以可以抑制旋转基体52的变形。 However, as described above, since the reinforcing member 25, the rotating base 52 to improve the strength, it is possible to suppress deformation of the rotating base 52.

因此,旋转部40即使旋转,也可以确保X射线穿透面位置的精度。 Thus, even if the rotation of the rotating portion 40, may ensure the accuracy of the surface position of X-ray transmission. 由此,可以进一步进行高速旋转,并且还可以一边改变转速一边摄影。 This can further be rotated at high speed, and may also change the speed while the side of photography. 此外,如图8所示,旋转部卑元,被安装在平板部48的前面侧, 以便能很容易地从前面侧进行维修,而加固构件25由于被安装在平板部48的背面侧,所以不会影响维修作业。 Further, as shown in FIG. 8, the rotating portion Peel element is mounted on the front side flat plate portion 48, so that the maintenance can be easily performed from the front side, since the reinforcing member 25 is mounted on the back side of the flat plate portion 48, so It does not affect the maintenance work. 另外,由于不使平板都48 的厚度增加,所以例如在由铝铸件制作旋转基体52时不会产生制作上的问题及形状精度劣化。 Further, since no increase in the plate 48 have a thickness of, for example, it is produced by aluminum casting and no problem on the deterioration of shape accuracy when making the rotating base 52.

此外,在本实施方式中,加固构件25为环状,但是例如也可以至少把X射线管单元41附近等局部地作为双重结构进行加固,以此抑制变形。 In the present embodiment, the reinforcing member 25 is annular, but may be, for example, at least close to the X-ray tube unit 41 and the like locally reinforced as a double structure, thereby suppressing deformation.

另外,旋转部单元是把安装在平板部48前面侧的情况作为例子进 Further, the rotating unit is a portion where the flat plate portion is mounted on the front side 48 as an example into

14行说明的,但是正如特开平2000-116641号公报所述的X射线CT装置那样,旋转部单元,也可以是安装在滚筒部49内周侧的面(单元安装面)上的构成。 14 to be described, but, as the X-ray CT apparatus Laid Open Patent Publication No. 2000-116641 described above, the rotating portion unit, may be mounted on a surface constituting the (unit mounting surface) 49 of the peripheral side portion of the drum. 这时,虽然是由滚筒部49承受离心力,但是由于具备加固构件25,所以可以抑制旋转基体52的变形。 In this case, although the cylinder portion 49 subjected to centrifugal forces, but because the reinforcing member 25 is provided, it is possible to suppress deformation of the rotating base 52.

再有,滚筒部49在内周侧面的安装,与上述特开平2000-116641 号公报所述的X射线CT装置一样,可以使用固定螺栓,或者也可以在滚筒部49的内周面设置导轨并把旋转部单元沿导轨可滑动地安装。 Further, mounting the inner circumferential side of the cylinder portion 49, and the X-ray CT apparatus of the above-described JP-A No. 2000-116641 of the same, the fixing bolts may be used, or may be provided in the circumferential surface of the guide portion 49 and the drum the rotary unit along the guide rail portion slidably mounted.

本发明,不仅可以适用于医用X射线计算机断层摄影装置,而且还可以适用于对机器类被检体进行检查的产业用X射线计算机断层才聂影装置和机场等场所行李检查用的X射线计算机断层摄影装置。 The present invention is not only applicable to medical X-ray computed tomography apparatus, but can be applied to an industrial X-ray computed tomography machine class is checked subject it Nie Movies means and airports and other places baggage inspection X-ray computed tomography apparatus.

其他的优点和改进对本领域人员来说也是很容易理解的,本发明的范围并不限于在此记述的具体内容。 Additional advantages and modifications skilled person is readily understood that the scope of the present invention is not limited to the details described herein. 相应地,在本发明的范围内可以对其进行各种改进。 Accordingly, within the scope of the invention various modifications may be made.

Claims (3)

  1. 1.一种X射线计算机断层摄影装置,具备: 以转轴为中心旋转地被支撑的筒型旋转基体, 搭载在上述旋转基体上的X射线管, 搭载在上述旋转基体上的X射线检测器, 固定在上述旋转基体轴心方向上的端部、且刚性比上述旋转基体大的加固环, 上述X射线管及上述X射线检测器,被配设在从上述旋转基体轴心方向中心部向相同一侧偏置的位置上, 上述加固环被设在上述旋转基体的轴心方向端部中、靠近上述X射线管及上述X射线检测器的端部, 上述加固环被固定在上述旋转基体外侧的周面或者上述旋转基体的端面上。 1. An X-ray computed tomography apparatus comprising: a rotary shaft as the center of rotation of the cylindrical rotating substrate is supported, mounted on the X-ray tube on the rotating base, equipped with an X-ray detector on the rotatable base, a fixed end portion in the axial direction of the rotating base, and rigidity than the rotation base large reinforcing ring, the X-ray tube and the X-ray detector is disposed from said rotatable base axial direction of the central portion in the same a position offset to one side of the said reinforcing ring is provided at an end portion of the rotating axial direction of the base, near the end of the X-ray tube and the X-ray detector, the reinforcement ring is fixed to the outside of the rotating base the circumferential surface or the end surface of the rotatable base.
  2. 2. 如权利要求1所述的X射线计算机断层摄影装置,上述加固环由铁、不锈钢以及钛中任何一种材料制作。 The X-ray computed tomography apparatus according to claim 1, the reinforcement ring made of iron, stainless steel, titanium and any material.
  3. 3. 如权利要求1所述的X射线计算机断层摄影装置,具备:由刚性比上述旋转基体大的材料制作、且被安装在上述旋转基体端部上以抑制上述旋转基体端部的扩展的挠曲的加固构件。 The X-ray computed tomography apparatus according to claim 1, comprising: making a rigid than that of the rotating base material, and is mounted to suppress the extension of the rotating base end portion of the flexible on said rotary base end portion the reinforcing member is curved.
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US8781061B2 (en) * 2009-04-16 2014-07-15 Hitachi Medical Corporation X-ray CT rotary apparatus
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