CN102737748A - Z-collimator and X-ray imaging device containing the same - Google Patents
Z-collimator and X-ray imaging device containing the same Download PDFInfo
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- CN102737748A CN102737748A CN2011100815935A CN201110081593A CN102737748A CN 102737748 A CN102737748 A CN 102737748A CN 2011100815935 A CN2011100815935 A CN 2011100815935A CN 201110081593 A CN201110081593 A CN 201110081593A CN 102737748 A CN102737748 A CN 102737748A
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Abstract
The invention relates to the field of medical equipment, and in particular to a Z-collimator which comprises two rotatable collimation bars arranged upward along the direction of Z, wherein each collimation bar includes a plurality of collimation handles of different lengths. Collimation is carried out by rotating the two calibration bars to enable collimation handles of the same length in the two calibration bars to form a collimation handle pair. The invention further provides an X-ray imaging device containing the Z-collimator.
Description
Technical field
The present invention relates to field of medical, particularly a kind of Z-collimating apparatus and the x-ray imaging equipment that comprises this Z-collimating apparatus.
Background technology
Along with the progress of medical level, (Computed Tomography, CT) scanner has obtained using widely the X ray computer fault imaging.CT scanner comprises at least: rotary frame, X-ray tube and detector.Wherein, rotary frame is a loop configuration, is positioned at the plane of being confirmed by transverse axis X axle and vertical axes Y axle and can rotates around the Z of this rotary frame axle; X-ray tube is installed on rotary frame, and the X-ray tube focus is launched X ray on the direction perpendicular to the Z axle.Two kinds of collimating apparatuss also are installed usually: Z-collimating apparatus and XY-collimating apparatus on bulb; Wherein, the Z-collimating apparatus is used to control the coverage of X-ray beam in the Z of detector direction, and detector is made up of plurality of rows on the Z direction; Therefore; Through control to the collimating slit A/F of Z-collimating apparatus, row's number that the scalable X-ray beam is covered on detector, thereby to selecting layer thickness adjustment; The XY-collimating apparatus is positioned at the XY plane, is used to control the coverage of X-ray beam on the XY plane.
Fig. 1 is the synoptic diagram of a kind of Z-collimating apparatus commonly used in the present CT scanner.This collimating apparatus is made up of a kind of shielding material of foil, has the collimating slit of a plurality of (shown in Figure 1 is seven) different openings width, and ordinate is the A/F of collimating slit, and horizontal ordinate is the length of collimating slit.The physical space that but this Z-collimating apparatus occupies is bigger; Because the collimating slit of above-mentioned different openings width is to be arranged in one by one in advance on the Z-collimating apparatus; When CT scan, select the collimating slit of appropriate openings width,, can select the collimating slit less than A/F as when when selecting layer thickness to have relatively high expectations (as nerve or blood vessel are scanned) according to the requirement of selecting layer thickness; And when selecting layer thickness less demanding, can select the bigger collimating slit of A/F.Decide its physical space that occupies because this Z-collimating apparatus is number and the openings of sizes by collimating slit, and the space of frame itself is limited, if the number of collimating slit is more, will reduce the physical space that other parts occupy.
Fig. 2 is an another kind of collimating apparatus commonly used in the present CT scanner; Its by two movably interlock collimating plate 1 (jawplate) form; These two jaws can move along reverse direction on the Z direction, to obtain the collimating slit of different openings width, shown in Fig. 2 split shed width 2 and 3.In this case, though the physical space that collimating apparatus occupies is relatively little, according to the A/F that selects layer thickness adjustment collimating slit, operating process more complicated.
Publication number is that the patented claim of CN101919700A discloses a kind of collimating apparatus that comprises the collimating slit of several different in width, and it is similar with aforementioned first kind of Z-collimating apparatus, and defective is that also the physical space that this collimating apparatus occupies is bigger.
Summary of the invention
The object of the present invention is to provide a kind of Z-collimating apparatus and the x-ray imaging equipment that comprises this Z-collimating apparatus,, reach and both reduce the physical space that the Z-collimating apparatus occupies, be easy to adjust the A/F of collimating slit again to solve the problems referred to above that exist in the prior art.
In view of this; The present invention provides a kind of Z-collimating apparatus; It upwards comprises two rotatable collimating plates (bar) at Z; Each collimating plate comprises the collimation pin (handle) of a plurality of different lengths, and it is right to make the collimation pin of equal length in said two collimating plates form a collimation pin through rotation, to collimate.This has reduced the physical space of the frame that the Z-collimating apparatus takies on directions X, and the A/F of collimating slit controlled more easily.
According to one embodiment of present invention, said two collimating plates are identical.To simplify the physical construction of collimating apparatus.
According to another embodiment of the invention, said two collimating plate symmetric arrangement.
According to still another embodiment of the invention, the sense of rotation of said two collimating plates is opposite.
According to still another embodiment of the invention, a plurality of collimation pin in each collimating plate are that equal angles is spaced apart.With convenient control collimation pin.
The present invention also provides a kind of said Z-collimating apparatus x-ray imaging equipment that comprises.
From such scheme, can find out, compare first kind of Z-collimating apparatus in the background technology, the shielding material that Z-collimating apparatus of the present invention adopts still less, so reduced cost.And the collimation pin of each collimating plate of the present invention is that equal angles is arranged, compares second kind of Z-collimating apparatus in the background technology, and the A/F of collimating slit is controlled more easily.In addition, Z-collimating apparatus of the present invention is arranged on the YZ plane or rotation, has reduced the physical space of the frame that on directions X, takies.Simultaneously, two collimating plates are identical, simplified the physical construction of collimating apparatus.
Description of drawings
To make clearer above-mentioned and other feature and advantage of the present invention of those skilled in the art through describing embodiments of the invention in detail below with reference to accompanying drawing, in the accompanying drawing:
Fig. 1 is the synoptic diagram of a kind of Z-collimating apparatus commonly used in the present CT scanner.
Fig. 2 is the synoptic diagram of another kind of Z-collimating apparatus commonly used in the present CT scanner.
Fig. 3 is the synoptic diagram that comprises the CT scanner of Z-collimating apparatus of the present invention.
Fig. 4 is the right synoptic diagram of collimation pin of Z-collimating apparatus of the present invention.
Fig. 5 is for adjusting the synoptic diagram of collimating slit A/F with Z-collimating apparatus of the present invention, wherein Fig. 5 a is by the synoptic diagram to the collimating slit that forms of pin surely, and Fig. 5 b is by the synoptic diagram of another collimation pin to the collimating slit that forms.
Reference numeral
A kind of Z-collimating apparatus in 1 prior art
The different openings width of the collimating slit of another kind of collimating apparatus in 2,3 prior aries
4 sweep lengths at the scanning center place
The collimating plate of 5 Z-collimating apparatuss of the present invention
The rotation center of 6 Z-collimating apparatus one collimating plates of the present invention and the distance at X-ray beam center
The A/F of 7 Z-collimating device collimation seams of the present invention
8 detectors
9 X-ray tubes
10 scanning center
The collimation pin of 11～15 Z-collimating apparatuss of the present invention
Embodiment
For making the object of the invention, technical scheme and advantage clearer, below lift embodiment to further explain of the present invention.
With the CT scanner is example, specifies Z-collimating apparatus of the present invention.
Fig. 3 is the X ray fan beam angle β=0 o'clock on XY plane, comprises the synoptic diagram of the CT scanner of Z-collimating apparatus of the present invention on the YZ plane.Z-collimating apparatus of the present invention comprises two rotatable collimating plates 5, and these two collimating plates 5 are in the Z symmetric arrangement that makes progress, the collimation pin of each collimating plate 5 comprises a plurality of (Fig. 3 has illustrated four) different length; The collimation pin of equal length forms that pin is right surely in these two collimating plates 5, and every aligning pin is to constituting a collimating slit, and the A/F of each collimating slit is fixed; 0.94mm for example, 1.42mm, 2.66mm; 4.2mm, 7.45mm etc., this point with background technology in first kind of collimating apparatus identical.
The X-ray beam that X-ray tube 9 sends among Fig. 3 is received by detector 8 behind the collimation of Z-collimating apparatus of the present invention.Wherein θ is an X ray pencil-beam angle; Its size is by collimating slit A/F 7 decisions of Z-collimating apparatus; X ray pencil-beam behind the collimation is represented with Reference numeral 4 in the sweep length of scanning center 10; Reference numeral 6 is rotation center and the distance between the X-ray beam center, the for example 25mm of each collimating plate of Z-collimating apparatus.
The material of two collimating plates 5 of Z-collimating apparatus of the present invention, shape, size etc. all are identical, and its material can be identical with the used shielding material of collimating apparatus in the prior art, for example tungsten.Preferably, a plurality of collimation pin in each collimating plate 5 are that equal angles is spaced apart, with convenient control collimation pin.
Each collimation pin is a polygon in the cross section on YZ plane among Fig. 3, but its shape can change according to X ray fan beam angle β on the directions X, and β is generally [28 °, 28 °].As shown in Figure 4, be the right synoptic diagram of Z-collimating apparatus pair of alignment pin of the present invention, wherein the cross sectional shape of each collimation pin 11 on the YZ plane is arc.
Fig. 5 is that wherein horizontal ordinate is the Z direction with the synoptic diagram of the adjustment collimating slit A/F of Z-collimating apparatus of the present invention, and ordinate is the Y direction.Illustrated the collimating plate formed by four collimation pin (12～15) among Fig. 5 a and Fig. 5 b; In fact the collimation pin number of each collimating plate can be decided according to the actual requirements, and four collimation pin 12～15 in the present embodiment are not in order to limit the number of collimation pin in each collimating plate.Because different objects to be checked are not wait in the sweep length 4 of scanning center 10, select suitable collimating slit A/F in view of the above, be the collimating slit of collimation pin that two collimation pin 15 form to constituting like what select for use among the 5a.When the next object to be checked of scanning; Through making of rotation center (axle) rotation of collimation bottoms around each collimating plate; To select suitable collimating slit A/F; Collimation pin like left side in Fig. 5 b is rotated counterclockwise, and the collimation pin on right side turns clockwise, and has so just selected two collimating slits of another collimation pin to constituting that collimation pin 13 forms.Because collimation pin 13 is shorter than the length of collimation pin 15; Therefore the collimation pin of two collimation pin 13 formation is just big to the collimating slit A/F that constitutes than the collimation pin that two collimation pin 15 form to the A/F of the collimating slit of formation; The collimation pin that passes 13 formation of two collimation pin is just bigger to the X ray pencil-beam angle of the collimating slit of formation, and the object range to be checked of scanning is also just bigger.
The present invention relates to field of medical; Particularly a kind of Z-collimating apparatus; It upwards comprises two rotatable collimating plates at Z; Each collimating plate comprises the collimation pin of a plurality of different lengths, and it is right to make the collimation pin of equal length in said two collimating plates form a collimation pin through rotation, to collimate.The present invention also provides a kind of x-ray imaging equipment that comprises this Z-collimating apparatus.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. Z-collimating apparatus; It is characterized in that; Said Z-collimating apparatus upwards comprises two rotatable collimating plates (5) at Z; Each collimating plate comprises the collimation pin (12～15) of a plurality of different lengths, makes the collimation pin of equal length in said two collimating plates form that pin is right surely through rotation, to collimate.
2. Z-collimating apparatus according to claim 1 is characterized in that, said two collimating plates are identical.
3. Z-collimating apparatus according to claim 1 is characterized in that, said two collimating plate symmetric arrangement.
4. Z-collimating apparatus according to claim 3 is characterized in that the sense of rotation of said two collimating plates is opposite.
5. Z-collimating apparatus according to claim 1 is characterized in that, a plurality of collimation pin in each collimating plate are that equal angles is spaced apart.
6. x-ray imaging equipment, it comprises like the described Z-collimating apparatus of arbitrary claim among the claim 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110081593.5A CN102737748B (en) | 2011-03-31 | 2011-03-31 | Z-collimator and X-ray imaging device containing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110081593.5A CN102737748B (en) | 2011-03-31 | 2011-03-31 | Z-collimator and X-ray imaging device containing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102737748A true CN102737748A (en) | 2012-10-17 |
| CN102737748B CN102737748B (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110081593.5A Active CN102737748B (en) | 2011-03-31 | 2011-03-31 | Z-collimator and X-ray imaging device containing the same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104288916B (en) * | 2013-07-16 | 2017-04-26 | 佳能株式会社 | Irradiation field-limiting apparatus, x-ray-generating unit, and x-ray radiography system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4679221A (en) * | 1985-08-08 | 1987-07-07 | Kabushiki Kaisha Toshiba | CT X-ray collimator including a reinforced collimator blade assembly |
| US5644614A (en) * | 1995-12-21 | 1997-07-01 | General Electric Company | Collimator for reducing patient x-ray dose |
| US20020015474A1 (en) * | 2000-07-31 | 2002-02-07 | Analogic Corporation | X-ray collimator |
| 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 |
| CN1685447A (en) * | 2002-09-26 | 2005-10-19 | 西门子公司 | Overlay device and computer tomography device comprising an emitter side overlay device |
| US20080237472A1 (en) * | 2007-03-30 | 2008-10-02 | General Electric Company | Adjustable collimators method and system |
| CN201387732Y (en) * | 2009-04-02 | 2010-01-20 | 深圳市华唯计量技术开发有限公司 | Collimator |
-
2011
- 2011-03-31 CN CN201110081593.5A patent/CN102737748B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4679221A (en) * | 1985-08-08 | 1987-07-07 | Kabushiki Kaisha Toshiba | CT X-ray collimator including a reinforced collimator blade assembly |
| US5644614A (en) * | 1995-12-21 | 1997-07-01 | General Electric Company | Collimator for reducing patient x-ray dose |
| 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 |
| US20020015474A1 (en) * | 2000-07-31 | 2002-02-07 | Analogic Corporation | X-ray collimator |
| CN1685447A (en) * | 2002-09-26 | 2005-10-19 | 西门子公司 | Overlay device and computer tomography device comprising an emitter side overlay device |
| US20080237472A1 (en) * | 2007-03-30 | 2008-10-02 | General Electric Company | Adjustable collimators method and system |
| CN201387732Y (en) * | 2009-04-02 | 2010-01-20 | 深圳市华唯计量技术开发有限公司 | Collimator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104288916B (en) * | 2013-07-16 | 2017-04-26 | 佳能株式会社 | Irradiation field-limiting apparatus, x-ray-generating unit, and x-ray radiography system |
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| CN102737748B (en) | 2015-06-03 |
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