CN100534389C - X-ray computed tomographic apparatus - Google Patents
X-ray computed tomographic apparatus Download PDFInfo
- Publication number
- CN100534389C CN100534389C CNB2006101291071A CN200610129107A CN100534389C CN 100534389 C CN100534389 C CN 100534389C CN B2006101291071 A CNB2006101291071 A CN B2006101291071A CN 200610129107 A CN200610129107 A CN 200610129107A CN 100534389 C CN100534389 C CN 100534389C
- Authority
- CN
- China
- Prior art keywords
- ray
- rotary substrate
- mentioned
- reinforcing ring
- ray tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
An X-ray computed tomographic apparatus includes a cylindrical rotary base (11) supported so as to be rotatable about a rotational axis, an X-ray tube unit (12) mounted on the rotary base (11), an X-ray detecting unit (13) mounted on the rotary base (11), and a reinforcing ring (15) fixed to an end of the rotary base (11), and having a greater rigidity than the rotary base (11).
Description
Technical field
The present invention is relevant to be possessed for obtaining the X ray computer laminagraph device of the rotating part that subject x-ray tomography image rotates.
Background technology
X ray computer laminagraph device (to call " X ray CT (ComputedTomography) device " in the following text) is according to the intensity that penetrates the X ray of subject, information as the relevant subject of image is provided, in many medical acts, plays an important role based on medical diagnosis on disease, treatment and surgical planning etc.
This X ray CT device has circular rotary substrate.This rotary substrate with its axle center be the center rotate freely ground supported, in the inboard of rotary substrate, fixed various devices such as X-ray tube, X-ray detector, device for generating high voltage.
Rotary substrate rotation, X-ray tube and X-ray detector towards variation.X ray CT device, utilize above-mentioned X-ray tube and X-ray detector towards variation, from various directions to subject photograph (for example, opening flat 8-52130 communique) with reference to the spy.
Yet, because weight such as X-ray tube, X-ray detector, device for generating high voltage are big, so the rotary substrate high speed rotating, the weights such as X-ray tube, X-ray detector, device for generating high voltage that are fixed in the matrix inboard produce very big centrifugal force, often cause the rotary substrate distortion.
If rotary substrate distortion causes that X-ray tube is provided with angular deflection, so by the angular misalignment of the X ray of X-ray tube irradiation, so X-ray detector becomes and can not correctly carry out X ray and detect.And, the dislocation of X ray circuit, the change in location of detection X ray will cause image deterioration.
Below, on one side with reference to Figure 11, be that example further describes with other examples on one side.
Figure 11 is the profile that the existing rotating part 40 of expression constitutes.As shown in figure 11, the stand of existing X ray CT device is provided with to obtaining the subject x-ray tomography image rotating part 40 of (for example more than or equal to 1 second/commentaries on classics) continuous rotation at a high speed.This rotating part 40 can remain on the framework 23 between bearing 91 with rotating freely.This rotating part 40 has been installed X-ray tube unit 41, X ray detecting unit 42, signal amplification unit 43 and other unit (not shown).Below, often these each unit are referred to as the rotating part unit.These each rotating part unit, being installed in rotating shaft N is on the cyclic flat part 48 (flat board) at center.
The outer circumference end of above-mentioned flat part 48 has formed the cylinder portion 49 of cylinder shape.Following flat part 48 and cylinder portion 49 are referred to as rotary substrate 52.Rotary substrate 52 is maintained on the framework 23 between bearing 91, and bearing 91 is by flat part 48 and 24 clampings of bearing maintaining part.
The X ray CT device that each rotating part unit is installed on cylinder portion 49 inboards is disclosed (for example, opening flat 2000-116641 communique with reference to the spy).On this rotating part 40, the unitary position of centre of gravity of each rotating part on the rotating shaft N direction of rotating part 40 is often inconsistent with the position of flat part 48.For example, X-ray tube unit 41 and X ray detecting unit 42 are configured to detect from the X-ray tube unit 41 irradiations with a double-layered quilt corpse or other object for laboratory examination and chemical testing and with the X ray detecting unit 42 of X-ray tube unit 41 relative configurations and penetrate the X ray of subject.That is to say, X-ray tube unit 41, though be for relative flat part 48 in the position of leaving rotating shaft N direction and form the penetration surface of X ray abreast and shine X ray, the center of gravity of X-ray tube unit 41 often is positioned at X ray and produces near the position.Specifically, X ray has disposed rotor (anode) and the weights such as protective lead for the leakage X ray is shielded near producing the position.Therefore, the relative flat part 48 of the center of gravity of X-ray tube unit 41 is in the position of leaving rotating shaft N direction.In addition, penetrate face side because X ray detecting unit 42 is configured in the X ray of flat part 48, so its center of gravity is the same with the center of gravity of X-ray tube unit 41, flat part 48 is in the position of departing from rotating shaft N direction relatively.In addition, other rotating part unit, for the consideration of when maintenance convenient working, flat part 48 is configured in and X-ray tube unit 41 and X ray detecting unit 42 the same side mutually relatively, so the same with X-ray tube unit 41 and X ray detecting unit 42, position of centre of gravity often misplaces.
Rotating part 40 high speed rotating, the unitary center of gravity of each rotating part is subjected to centrifugal action.For example, the centrifugal force F that acts on X-ray tube unit 41 shown in Figure 11 is exactly the one example.For example, the distance from rotating shaft N to X-ray tube unit 41 centers of gravity be 600mm and rotating speed be 0.5 second/when changeing, produce the acceleration of gravity of about 10G.In addition, the distance from rotating shaft N to X-ray tube unit 41 centers of gravity be 600mm and revolve speed be 0.4 second/when changeing, produce the acceleration of gravity of about 15G.
Yet, as mentioned above, if the location dislocation of the flat part 48 of the position of centre of gravity of X-ray tube unit 41 on the rotating shaft N direction, so during rotating part 40 high speed rotating, the component F1 that acts on the unitary centrifugal force F of each rotating part will act on the holding position of rotary substrate 52 as moment of flexure, often cause flat part 48 distortion.Same centrifugal force also acts on X ray detecting unit 42 and other rotating part unit, often causes flat part 48 distortion.As the spy open flat 2000-116641 communique described, when each rotating part unit was installed in cylinder portion 49 inboard, same flat part 48 also can produce distortion, just the deflection difference.Because this centrifugal force F causes the cause of flat part 48 distortion, so the precision of X ray penetration surface position when being difficult to guarantee high speed rotating.
Therefore, in order to carry out high-precision test by enough X ray detecting units 42, also adopt the corresponding method that increases the X ray penetration surface sometimes, but this has also increased the irradiation dose of subject simultaneously.In addition, when the deformation extent of flat part 48 is big, cause that probably the destruction of rotary substrate 52 and CT value change problems such as causing the CT image abnormity.
On the other hand, get off to observe, require to shorten photography time and wish that promptly more high speed rotating is photographed, but more high speed rotating will increase above-mentioned distortion in order to make the motion thing for example heart etc. to be static.
In addition, while also requirement can change rotating speed and photograph.Change rotating speed, centrifugal force changes, so deflection also changes along with rotation speed change.For this reason, worry that deflection variation causing CT image further produces unusual.
In addition, though the thickness that also consider to increase flat part 48 to improve intensity, rotary substrate 52 is normally made by aluminium casting, the local thickness that increases, the moving and cooling of casting liquid stream can go wrong, and for example, worries to produce internal stress, perhaps form accuracy deterioration.On the other hand, to comprising the integral body thickening of cylinder portion 49, weight increases the weight of so, also needs to make drive motors to maximize thus, thereby exists the huge problem of device.
Have again, because rotary substrate 52 reinforcement means, the operation when reducing above-mentioned maintenance sometimes.
Summary of the invention
Even the invention provides the rotary substrate high speed rotating, angle is set also can be offset of X ray and detector, and image quality is difficult to the X ray computer laminagraph device of deterioration.
The invention provides and can not make the device maximization, and can reinforce the X ray computer laminagraph device of rotary substrate.
X ray computer laminagraph device of the present invention is constructed as follows.
(1) X ray computer laminagraph device, to possess can be the cartridge type rotary substrate that supports rotatably of center with the rotating shaft, carry at the X-ray tube on the above-mentioned rotary substrate, carry at the X-ray detector on the above-mentioned rotary substrate, be fixed on the end of above-mentioned rotary substrate axis direction and the rigidity reinforcing ring bigger than above-mentioned rotary substrate.
(2) in (1) described X ray computer laminagraph device, above-mentioned X-ray tube and above-mentioned X-ray detector, be provided in from above-mentioned rotary substrate axis direction central part on the position that mutually same lateral deviation is put, above-mentioned reinforcing ring is arranged in the axis direction end of above-mentioned rotary substrate the end near above-mentioned X-ray tube and above-mentioned X-ray detector.
(3) in (1) described X ray computer laminagraph device, above-mentioned reinforcing ring is fixed on the end face of above-mentioned rotary substrate.
(4) in (1) described X ray computer laminagraph device, above-mentioned reinforcing ring is fixed on the side face in the above-mentioned rotary substrate outside.
(5) in (1) described X ray computer laminagraph device, above-mentioned reinforcing ring can be by any one material in ferrum, rustless steel and the titanium.
(6) X ray computer laminagraph device, to possess can be the cartridge type rotary substrate that supports rotatably of center with the rotating shaft, carry at the X-ray tube on the above-mentioned rotary substrate, carry at the X-ray detector on the above-mentioned rotary substrate, by the rigidity material bigger than above-mentioned rotary substrate and be installed on the above-mentioned rotary substrate end to suppress the strenthening member of above-mentioned rotary substrate deflection.
(7) have for obtaining the X ray computer laminagraph device of the rotating part that subject x-ray tomography image rotates, above-mentioned rotating part possesses annular plate that the rotating shaft that contains with this rotating part is the center and at the rotary substrate of the distolateral formed cylinder of above-mentioned dull and stereotyped periphery, at the X-ray tube of the above-mentioned subject irradiation of either party surface lateral of above-mentioned flat board X ray, be installed on the above-mentioned rotary substrate and constitute the strenthening member of dual structure jointly with above-mentioned rotary substrate in above-mentioned dull and stereotyped the opposing party's face side.
(8) in (7) described X ray computer laminagraph device, above-mentioned strenthening member with respect to above-mentioned rotary substrate, is engaged near the Zhou Duan in reaching near the outer circumference end of this rotary substrate.
(9) in (7) described X ray computer laminagraph device, between above-mentioned strenthening member and above-mentioned flat board, has blank part.
(10) in (7) described X ray computer laminagraph device, above-mentioned strenthening member is ring-type.
(11) in (7) described X ray computer laminagraph device, above-mentioned X-ray tube is installed in the inner peripheral surface of above-mentioned cylinder.
Utilize X ray computer laminagraph device of the present invention, even during the rotary substrate high speed rotating, angle is set also can be offset of X-ray tube and detector is difficult to cause the image quality deterioration.And do not need to make device to maximize.
Other purposes of the present invention and advantage are documented in the following description book, and become clearer by the explanation of description and enforcement of the present invention, especially can be understood and obtain by following means or combination.
The accompanying drawing simple declaration
Fig. 1 is the axonometric chart of the X ray CT device of first embodiment of the invention.
Fig. 2 is the skeleton diagram of the stand of this embodiment.
Fig. 3 is the axonometric chart of the rotary substrate of this embodiment.
Fig. 4 is the sectional side view of the rotary substrate of this embodiment.
Fig. 5 is the sectional side view of the rotary substrate of this embodiment variation.
Fig. 6 is the figure that the X ray CT device outward appearance of expression second embodiment of the invention constitutes.
Fig. 7 is the block chart that the X ray CT device of this embodiment of expression constitutes.
Fig. 8 is that the axonometric chart that the rotating part in the X ray CT device stand of this embodiment constitutes is located in expression.
Fig. 9 is that the axonometric chart that the rotating part in the X ray CT device stand of this embodiment constitutes is located in expression.
Figure 10 is that the profile that the rotating part in the X ray CT device stand of this embodiment constitutes is located in expression.
Figure 11 is that the profile that the rotating part in the existing X ray CT device stand constitutes is located in expression.
The specific embodiment
(first embodiment)
At first, Yi Bian with reference to Fig. 1-Fig. 5, Yi Bian describe with regard to first embodiment of the present invention.
Fig. 1 is the axonometric chart of the relevant X ray CT device of first embodiment of the invention.
As shown in Figure 1, X ray CT device, possess to subject irradiation X ray, and be positioned at platform for sleeping in 10 on the camera positions of stand 20 with the control device 30 that generates the diagnostic image in a plurality of sections of subject, subject according to the picture signal that obtains by stand 20 when obtaining stand 20,20 actions of control stand of the picture signal in a plurality of sections of subject according to the X ray that penetrates this subject.
The important elements of present embodiment is the rotary substrate of being located in the stand 20 11.Therefore, in the following description, omit in the present embodiment not too part and parcel, for example the explanation of part such as housing.In addition, in description of the present embodiment, the front side in " preceding " presentation graphs 1, the rear side in " back " presentation graphs 1.
Fig. 2 is the skeleton diagram of the relevant stand 20 of this embodiment.
As shown in Figure 2, put into the photography mouth 5 of subject when this stand 20 possesses photography,,, set the rotary substrate 11 of tubular in order to surround photography mouth 5 and coaxial with photography mouth 5 in stand 20 inboards.This rotary substrate 11 can utilize the driving mechanism that is provided in the stand 20, is the center high speed rotating with the axle center of this rotary substrate 11.
Fig. 3 is the axonometric chart of the relevant rotary substrate 11 of this embodiment, and Fig. 4 is the sectional side view of the relevant rotary substrate 11 of this embodiment.
As shown in Figure 3 and Figure 4, this rotary substrate 11, as previously mentioned, for cylindric, its inboard fixed the subject irradiation X ray in being placed into photography mouthfuls 5 X-ray tube unit 12, detect the X ray detecting unit 13 of the X ray that penetrates subject and produce the high-tension power subsystem 14 that is added on the X-ray tube unit 12.These X-ray tube unit 12, X ray detecting unit 13 and power subsystem 14, weight is very heavy, is so-called weight.The material of rotary substrate 11, use be aluminium etc.
X ray detecting unit 13 is fixed on the front of the installation component 11b that is located at rotary substrate 11 inner peripheral surfaces.Installation component 11b is configured in the position that rotary substrate 11 axis directions slightly lean on central part.Therefore, be fixed in the center of gravity of the X ray detecting unit 13 and the above-mentioned X-ray tube unit 12 of installation component 11b front, all be partial to the place ahead of rotary substrate 11.The fixing bolt that all uses of installation component 11b and X ray detecting unit 13 and installation component 11b and power subsystem 14.
At the front end face of rotary substrate 11, fixed and above-mentioned rotary substrate 11 co-axial reinforcing rings 15.Reinforcing ring 15 contains a plurality of for example four circular-arc member 15a.Therefore, compare, make very and simplify with the situation that constitutes reinforcing ring 15 with a member.But the reinforcing ring 15 that the present invention is correlated with is not limited to this, also can be a cyclic member.
Reinforcing ring 15 front end faces have been configured retainer ring 16.Retainer ring 16 contains a plurality of for example four circular-arc fixed component 16a.Each fixed component 16a is configured to cover the seam of the circular-arc member 15a that constitutes reinforcing ring 15, to link adjacent reinforcing ring 15 with bolt.Use the bolt (not shown) that reinforcing ring 15 is fixed on the rotary substrate 11.This bolt also can be shared with the bolt that is used to link above-mentioned reinforcing ring 15.The material of reinforcing ring 15 can use the rigidity material higher than aluminum, such as ferrum, rustless steel or titanium etc.In addition, can also set other retainer ring (not shown) again at the front end face of retainer ring 16.
Below, the action and the effect that just possess the X ray CT device of above formation describe.
, the front end face of the rotary substrate in the present embodiment 11 has been fixed reinforcing ring 15.And the material of reinforcing ring 15 uses material high ferrum, rustless steel or the titanium of rigidity than rotation matrix 11.
Therefore, even the leading section of rotary substrate 11 has the bigger power effect of attempting to expand, rely on the rigidity of reinforcing ring 15, rotary substrate 11 can not be out of shape yet.As a result, the angle that is provided with that is equipped on the X-ray tube unit 12 of rotary substrate 11 inboards and X ray detecting unit 13 keeps certain, even during rotary substrate 11 high speed rotating, also can generate stable distinct diagnostic image.
And, owing to just reinforcing ring 15 is installed, so the X ray computer laminagraph device of existing, unequipped reinforcing ring 15 also can install reinforcing ring additional simply.That is to say,,, just can adapt to the high speed rotating of rotary substrate 11 as long as reinforcing ring 15 is installed even be the X ray computer laminagraph device of prerequisite with rotary substrate 11 low speed rotation.
Below, on one side with reference to Fig. 5, describe with regard to the relevant reinforcing ring 17 of modified embodiment of the present embodiment on one side.
Fig. 5 is the sectional side view of the relevant rotary substrate 11 of this embodiment variation.
As shown in Figure 5, the reinforcing ring 17 in the present embodiment is fixed on the front end outer peripheral face of rotary substrate 11.That is to say that reinforcing ring 17 is embedded into the outside of rotary substrate 11.
Reinforcing ring 17 contains a plurality of for example four circular-arc member 17a.Therefore, compare, make very and simplify with the situation that constitutes reinforcing ring 17 with a member.But the reinforcing ring 17 that the present invention is correlated with is not limited to this, also can be a cyclic member.
Reinforcing ring 17 front end faces have disposed retainer ring 18.Retainer ring 18 contains a plurality of for example four circular-arc fixed component 18a.Each fixed component 18a is configured to cover the seam of the circular-arc member 17a that constitutes reinforcing ring 17, to link adjacent fixed component 18a with bolt.Use the bolt (not shown) that reinforcing ring 17 is fixed on the rotary substrate 11.In addition, in the present embodiment,, also can be fixed on for example outer peripheral face of reinforcing ring 17 though retainer ring 18 is configured in the front end face of reinforcing ring 17.The material of reinforcing ring 17 can use the rigidity material higher than aluminum, such as ferrum, rustless steel or titanium etc.In addition, can also set other retainer ring (not shown) again at the front end face of retainer ring 18.
Like this, reinforcing ring 17 is fixed on the outer peripheral face of rotary substrate 11, and the installation of reinforcing ring 17 will be simplified.In addition, the fixedly use of rotary substrate 11 and reinforcing ring 17 gets final product than the bolt of small intensity.
In addition, in the above-described embodiment, the material of reinforcing ring 15,17, though use ferrum, rustless steel and titanium, the present invention is not limited to this, as long as rigidity is higher than the material of rotary substrate 11, then what material can.Therefore, the material of reinforcing ring 15,17 can be selected according to the material of rotary substrate 11.
And in the above-described embodiment, reinforcing ring 15,17 is located at the front end of rotary substrate 11., the rear of the center of gravity of X-ray tube unit 12, X ray detecting unit 13, power subsystem 14 deflection rotary substrate 11, then reinforcing ring 15,17 is located at the rear end of rotary substrate 11.Certainly, also can not depend on the position of centre of gravity of X-ray tube unit 12, X ray detecting unit 13, power subsystem 14, reinforcing ring 15,17 is set in the front-end and back-end of rotary substrate 11.
And then, in the above-described embodiment, fixing, the rotary substrate 11 of fixing, the rotary substrate 11 of rotary substrate 11 and X-ray tube unit 12 and X ray detecting unit 13 and fixing and the rotary substrate 11 and the reinforcing ring 1517 of power subsystem 14 fixing uses bolt.Yet the present invention is not limited to this, as long as can be securely fixed on the rotary substrate 11, also can be other means.
(second embodiment)
Below, Yi Bian with reference to Fig. 6-Figure 10, Yi Bian describe with regard to second embodiment of the present invention.
Fig. 6 is the figure that the outward appearance of expression present embodiment X ray CT device constitutes, Fig. 7 is the block chart of the formation of expression present embodiment X ray CT device, Fig. 8, Fig. 9 are that the axonometric chart that the rotating part in the present embodiment X ray CT device stand constitutes is located in expression, and Figure 10 is the profile that expression present embodiment rotating part 40 constitutes.
In Fig. 6, the X ray CT device of present embodiment possesses platform for sleeping in 10 for subject (not shown) such as load patients, has for inserting the control device 30 that subject is controlled with the photography mouth 5 of irradiation X ray and the stand 20 that is covered by stand 21, to the action of whole X ray CT device.
When obtaining the X ray CT image of subject, utilize driver element 61 to make and crouch platform 10, and the subject that is loaded on the platform 10 that crouches is inserted in the photography mouth 5 of stand 20 near stand 20.Be provided with rotating part 40 in the stand 20, as shown in Figure 8, possesses the X-ray tube unit 41 that produces X ray in the rotating part 40, for detect from the X-ray tube unit 41 penetrate and penetrate the X ray of subject and a double-layered quilt corpse or other object for laboratory examination and chemical testing and with the X ray detecting unit 42 of X-ray tube unit 41 relative configurations, to carrying out amplifying signal amplifying unit 43 by X ray detecting unit 42 detected signals, adjacent with X-ray tube unit 41 and establish and to carrying out refrigerative cooling unit 44 in X-ray tube unit 41, for the power subsystem 4546 of tube voltage (tube current) is provided to X-ray tube unit 41, the power control unit 47 of control power subsystem 4546 (below, these each unit are referred to as the rotating part unit).
As shown in Figure 7, control device 30 possesses for input block 31, the demonstration that obtains the X ray CT image and need to import various command and obtains the necessary information of X ray CT image and display unit 32, the storage of the X ray CT image obtained etc. obtain the necessary information of X ray CT image and the memory element 33 of the X ray CT image obtained etc., system control unit 34 that each unitary action of X ray CT device is controlled.
In addition, rotating part 40 drives rotation by the control of rotation control unit 50 by drive motors 51.Thus, rotating part 40 high speed rotating around subject.In addition, the rotating speed of rotating part 40 for example more than or equal to 1 second/change, particularly more than or equal to 0.5 second/change.That is to say that in order to obtain the X ray CT image of subject, rotating part 40 is for circle required time smaller or equal to 1 second around subject, particularly smaller or equal to 0.5 second.
When obtaining the X ray CT image of subject, rotating part 40 is in the process that circles around the subject, control by power control unit 47 is supplied the tube voltage (tube current) of regulation by power subsystem 4546 to X-ray tube unit 41, thus X ray from the X-ray tube unit 41 irradiation subjects, the X ray that penetrates subject is detected by X ray detecting unit 42.The detection signal of the relevant X ray that is detected by X ray detecting unit 42 is amplified by signal amplification unit 43, and is supplied to system control unit 34.System control unit 34, image resynthesis processing of stipulating according to this detection signal etc. obtains the X ray CT pictorial display in display unit 32, and is stored in the memory element 33 to obtain the X ray CT image.
Below, use Fig. 8 to Figure 10, describe with regard to the detailed formation of the rotating part of present embodiment.In addition, in description of the present embodiment, the platform side for sleeping in of rotating part 40 as " front ", opposition side as " back side ".Therefore, axonometric chart shown in Figure 8 is the axonometric chart of seeing from front face side, and axonometric chart shown in Figure 9 is the axonometric chart of seeing from rear side.In addition, in Fig. 8, omitted the rear side of rotating part 40.
Rotating part 40 as shown in Figure 8, is for example made by aluminium casting, and it is the cyclic flat part (flat board) 48 of rotation on every side of the subject of center in being inserted into photography mouth 5 that front face side possesses with rotating shaft N (with reference to Figure 10).And, outer circumference end at flat part 48, the cylinder portion (cylinder) 49 of formation coaxial and wideer cylinder shape with ring-type than the width (thickness of slab) of flat part 48 rotating shaft N directions, cylinder portion 49 as shown in figure 10, form to rear side from the front face side of flat part 48, its section of bonding part of flat part 48 and cylinder portion 49 is the T font.Below, flat part 48 and cylinder portion 49 are referred to as rotary substrate 52 together.
And, with the length of the rectangular rotating diameter direction of the rotating shaft N of flat part 48 (with reference to Fig. 1 0), in other words be cyclic width, have the length that X ray detecting unit 42 can be installed at least.And, the front face side of flat part 48 is used the installations such as set bolt that do not show among the figure as the unitary X-ray tube of above-mentioned rotating part unit 41, X ray detecting unit 42, signal amplification unit 43, cooling unit 44, power subsystem 4546 and power control unit 47.In addition, the width of the rotating shaft N direction of the cylinder of cylinder portion 49 is not advisable from the width that cylinder portion 49 cylinders bloat in rotating shaft N direction with above-mentioned each unit that is installed on the flat part 48.In addition, X-ray tube unit 41 is configured to flat part 48 relatively in the position of leaving rotating shaft N direction and form the penetration surface of X ray abreast.Have again, as described in (background technology),, produce near the position so the center of gravity of X-ray tube unit 41 often is positioned at X ray owing to disposed rotor (anode) and weights such as protective lead near the X ray generator for the leakage X ray is shielded.That is to say that in the present embodiment, the relative flat part 48 of the center of gravity of X-ray tube unit 41 also is in rotating shaft N direction and leaves the position that X ray penetrates face side.
In addition, as Fig. 9, shown in Figure 10, on rotary substrate 52, the rear side of flat part 48 has been installed strenthening member 25, and constitutes dual structures jointly with rotary substrate 52.Strenthening member 25 is for example made by aluminium casting, in the present embodiment, as an example for to have same ring-type and to have L font section with flat part 48.In addition, the length of the rotating diameter direction of strenthening member 25 has the length length much at one with the rotating diameter direction of flat part 48.And, strenthening member 25, the set bolt that does not show among the use figure near a plurality of installation portions 101 of the position the outer circumference end of rotary substrate 52 etc. is bonded on cylinder portion 49 from rear side, in addition, as shown in Figure 8, use near a plurality of installation portions 102 of the position the interior Zhou Duan of rotary substrate 52 set bolt that do not show among the figure etc. from the front side engagement at flat part 48.In addition, has blank part 26 between strenthening member 25 and the flat part 48.Like this, because strenthening member 25 can be installed,, increased intensity to the bending of rotating shaft N direction so become big with the rectangular section second moment of rotor shaft direction.In addition, owing to form blank part 26, reduced the increase of weight, and compared with only installing along flat part 48, it is big that the section second moment becomes, and further increased intensity.
Have, in the present embodiment, as an example, by strenthening member 25 and bearing maintaining part 24 common clamping bearings 91, thereby rotating part 40 can remain on the framework 23 between bearing 91 with rotating freely again.
In this formation, rotary substrate 52 is the center rotation with rotating shaft N, rotation around the subject of X-ray tube unit 41 in being inserted into photography mouth 5.At this moment, as described in (background technology), in the center of gravity of X-ray tube unit 41, the component of centrifugal force F is as attempting the moment of flexure effect of flat part 48 to the distortion of rotating shaft N direction at the direction of leaving rotating shaft N (outwardly) centrifugal action., as mentioned above, because strenthening member 25, rotary substrate 52 has improved intensity, so can suppress the distortion of rotary substrate 52.
Therefore, even rotating part 40 rotations also can be guaranteed the precision of X ray penetration surface position.Thus, can further carry out high speed rotating, while and can change rotating speed and photograph.In addition, as shown in Figure 8, the rotating part unit is installed in the front face side of flat part 48, so that can keep in repair from front face side at an easy rate, and strenthening member 25 is owing to being installed in the rear side of flat part 48, so can not influence maintenance activity.In addition, because the thickness of flat part 48 is increased, for example when making rotary substrate 52, can not produce problem and form accuracy deterioration in the making by aluminium casting.
In addition, in the present embodiment, strenthening member 25 is ring-type, but for example also can reinforce as dual structure partly waiting near the X-ray tube unit 41 at least, suppresses distortion with this.
In addition, the rotating part unit is that the situation that is installed in flat part 48 front face side is described as an example, but as the spy opens the described X ray CT device of flat 2000-116641 communique, the rotating part unit also can be mounted in the formation on the face (unit installed surface) of all sides in the cylinder portion 49.At this moment, though be to bear centrifugal force by cylinder portion 49, owing to possess strenthening member 25, so can suppress the distortion of rotary substrate 52.
Have again, cylinder portion 49 is in the lateral installation of interior week, to open the described X ray CT device of flat 2000-116641 communique the same with above-mentioned spy, can use set bolt, guide rail perhaps also can be set at the inner peripheral surface of cylinder portion 49 and the rotating part unit is installed slidably along guide rail.
The present invention, not only go for the medical X-ray computer tomography device, but also go for X ray computer laminagraph device that the industry that machine class subject is checked is used with place baggage checks such as X ray computer laminagraph device and airports.
Other advantage and improvement are readily appreciated that also that concerning those skilled in the art scope of the present invention is not limited to the particular content in this record.Correspondingly, can carry out various improvement to it within the scope of the invention.
Claims (3)
1. X ray computer laminagraph device possesses:
With the rotating shaft is the supported rotatably cartridge type rotary substrate in center,
The X-ray tube of lift-launch on above-mentioned rotary substrate,
The X-ray detector of lift-launch on above-mentioned rotary substrate,
Be fixed on end and the rigidity reinforcing ring bigger on the above-mentioned rotary substrate axis direction than above-mentioned rotary substrate,
Above-mentioned X-ray tube and above-mentioned X-ray detector are provided in from above-mentioned rotary substrate axis direction central part on the position that mutually same lateral deviation is put,
Above-mentioned reinforcing ring is arranged in the axis direction end of above-mentioned rotary substrate, near the end of above-mentioned X-ray tube and above-mentioned X-ray detector,
Above-mentioned reinforcing ring is fixed on the end face of the side face in the above-mentioned rotary substrate outside or above-mentioned rotary substrate.
2. X ray computer laminagraph device as claimed in claim 1, above-mentioned reinforcing ring is by any material in ferrum, rustless steel and the titanium.
3. X ray computer laminagraph device as claimed in claim 1 possesses:
By rigidity than the big material of above-mentioned rotary substrate and be installed on the above-mentioned rotary substrate end strenthening member with the deflection of the expansion that suppresses above-mentioned rotary substrate end.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005261009A JP4761898B2 (en) | 2005-09-08 | 2005-09-08 | X-ray computed tomography system |
| JP2005261009 | 2005-09-08 | ||
| JP2005324386 | 2005-11-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1927121A CN1927121A (en) | 2007-03-14 |
| CN100534389C true CN100534389C (en) | 2009-09-02 |
Family
ID=37857368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101291071A Active CN100534389C (en) | 2005-09-08 | 2006-09-08 | X-ray computed tomographic apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4761898B2 (en) |
| CN (1) | CN100534389C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5608321B2 (en) * | 2008-09-12 | 2014-10-15 | 株式会社東芝 | X-ray CT system |
| WO2010119850A1 (en) * | 2009-04-16 | 2010-10-21 | 株式会社 日立メディコ | X-ray ct device |
| CN105212953A (en) * | 2015-10-07 | 2016-01-06 | 王慎峰 | Radiology department's diagnosing image instrument |
| CN107981880B (en) | 2016-10-26 | 2021-03-16 | 北京东软医疗设备有限公司 | CT machine and rotator thereof |
| CN109820532A (en) * | 2019-02-01 | 2019-05-31 | 上海联影医疗科技有限公司 | CT equipment and its rotatable support structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4217499A (en) * | 1976-09-13 | 1980-08-12 | General Electric Company | Tomographic scanning apparatus with ionization detector means |
| US5703921A (en) * | 1995-05-30 | 1997-12-30 | Kabushiki Kaisha Toshiba | X-ray computed tomography apparatus |
| US5751781A (en) * | 1995-10-07 | 1998-05-12 | Elekta Ab | Apparatus for treating a patient |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52151586A (en) * | 1976-04-19 | 1977-12-16 | Varian Associates | Sectional camera scanner |
| US5448608A (en) * | 1994-02-08 | 1995-09-05 | Analogic Corporation | Tomographic scanner having center of rotation for all physics |
| JP3489757B2 (en) * | 1994-06-07 | 2004-01-26 | 株式会社東芝 | X-ray CT system |
| JP4789226B2 (en) * | 2001-03-01 | 2011-10-12 | 株式会社日立メディコ | X-ray CT system |
-
2005
- 2005-09-08 JP JP2005261009A patent/JP4761898B2/en active Active
-
2006
- 2006-09-08 CN CNB2006101291071A patent/CN100534389C/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4217499A (en) * | 1976-09-13 | 1980-08-12 | General Electric Company | Tomographic scanning apparatus with ionization detector means |
| US5703921A (en) * | 1995-05-30 | 1997-12-30 | Kabushiki Kaisha Toshiba | X-ray computed tomography apparatus |
| US5751781A (en) * | 1995-10-07 | 1998-05-12 | Elekta Ab | Apparatus for treating a patient |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4761898B2 (en) | 2011-08-31 |
| CN1927121A (en) | 2007-03-14 |
| JP2007068848A (en) | 2007-03-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100534389C (en) | X-ray computed tomographic apparatus | |
| US7447294B2 (en) | X-ray computed tomographic apparatus | |
| US8681930B2 (en) | High speed rotating gantry | |
| US20060214108A1 (en) | Gamma Camera and CT System | |
| US7508904B2 (en) | X-ray CT apparatus | |
| JP5677940B2 (en) | X-ray CT system | |
| CN105408732A (en) | Testing device for thin-walled large bearing | |
| JPH06502241A (en) | tomography collecting device | |
| US9247917B2 (en) | X-ray computed tomography apparatus | |
| JP6297373B2 (en) | Thin large bearing test equipment | |
| US20130308759A1 (en) | Air bearing dynamic z-axis balancing | |
| CN104814751B (en) | X-ray equipment | |
| US6412345B1 (en) | Balancing of rotational components of CT imaging equipment | |
| US7623619B2 (en) | X-ray CT apparatus | |
| US20070036273A1 (en) | Bearing and x-ray diagnostic apparatus using same | |
| US4774411A (en) | Gamma tomography apparatus | |
| CN101361662B (en) | Digital irradiation photography system pillar rotary chassis | |
| CN106333704B (en) | PET rack | |
| US20070252087A1 (en) | Wobbling mechanism to compensate FOV truncation in spect systems | |
| JP2607394Y2 (en) | Positron emission CT system | |
| CN114034711A (en) | Long cylinder appearance detection device | |
| US7173249B2 (en) | Nuclear medical diagnostic apparatus and method for detecting radiation | |
| SU650521A3 (en) | Device for axial tomography | |
| JP4318804B2 (en) | X-ray diagnostic equipment | |
| JPH11146874A (en) | X-ray ct |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160715 Address after: Japan Tochigi Patentee after: Toshiba Medical System Co., Ltd. Address before: Tokyo, Japan, Japan Patentee before: Toshiba Corp Patentee before: Toshiba Medical System Co., Ltd. |