CN102737748B - 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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- CN102737748B CN102737748B CN201110081593.5A CN201110081593A CN102737748B CN 102737748 B CN102737748 B CN 102737748B CN 201110081593 A CN201110081593 A CN 201110081593A CN 102737748 B CN102737748 B CN 102737748B
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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 device, particularly a kind of Z-collimating apparatus and the x-ray imaging equipment comprising this Z-collimating apparatus.
Background technology
Along with the progress of medical level, X ray computer fault imaging (Computed Tomography, CT) scanner is widely used.CT scanner at least comprises: rotary frame, X-ray tube and detector.Wherein, rotary frame is loop configuration, is positioned at the plane determined by transverse axis X-axis and vertical axes Y-axis and can rotates around the Z axis of this rotary frame; Be provided with X-ray tube on the rotating gantry, X-ray tube focus is launching X ray perpendicular on the direction of Z axis.Usually two kinds of collimating apparatuss are also installed on bulb: Z-collimating apparatus and XY-collimating apparatus, wherein, Z-collimating apparatus is for controlling the coverage of X-ray beam in the Z-direction of detector, and detector is made up of some rows in z-direction, therefore, by the control of the collimating slit A/F to Z-collimating apparatus, the row that adjustable X-ray beam is covered on the detector, thus to selecting layer thickness adjustment; XY-collimating apparatus is positioned at XY plane, for controlling the coverage of X-ray beam in XY plane.
Fig. 1 is the schematic diagram of a kind of Z-collimating apparatus conventional in current CT scanner.This collimating apparatus is made up of a kind of shielding material of foil, and have the collimating slit of a plurality of (Figure 1 shows that seven) different openings width, ordinate is the A/F of collimating slit, and horizontal ordinate is the length of collimating slit.But the physical space that occupies of this Z-collimating apparatus is larger, because the collimating slit of above-mentioned different openings width is arranged in Z-collimating apparatus in advance one by one, when CT scan according to the collimating slit selecting the requirement of layer thickness to select appropriate openings width, as when to (as scanned neural or blood vessel) when selecting layer thickness requirement higher, the collimating slit less compared with A/F can be selected, and to when selecting layer thickness less demanding, the collimating slit that A/F is larger can be selected.Because this Z-collimating apparatus decides its physical space occupied by the number of collimating slit and openings of sizes, and the limited space of frame itself, if the number of collimating slit is more, the physical space that other parts occupy will be reduced.
Fig. 2 is another kind of collimating apparatus conventional in current CT scanner, it is movably engaged collimating plate 1 (jawplate) by two and forms, these two jaws can move in z-direction in the opposite direction, to obtain the collimating slit of different openings width, as shown in Fig. 2 split shed width 2 and 3.In this case, although the physical space that collimating apparatus occupies is relatively little, according to the A/F selecting layer thickness to adjust collimating slit, operating process more complicated.
Publication number be CN101919700A application discloses a kind of collimating apparatus comprising the collimating slit of several different in width, it is similar to the first Z-collimating apparatus aforementioned, and defect is also, the physical space that this collimating apparatus occupies is larger.
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 comprising this Z-collimating apparatus, to solve the above-mentioned problems in the prior art, reach the physical space both reducing Z-collimating apparatus and occupy, be easy to again the A/F adjusting collimating slit.
In view of this, the invention provides a kind of Z-collimating apparatus, it comprises two rotatable collimating plates (bar) in Z-direction, each collimating plate comprises the collimation pin (handle) of a plurality of different length, the collimation pin of equal length in described two collimating plates is made to form a collimation pin pair, to collimate by rotating.Which reduce the physical space of the frame that Z-collimating apparatus takies in the X direction, and the A/F of collimating slit is more easily controlled.
According to one embodiment of present invention, described two collimating plates are identical.To simplify the physical construction of collimating apparatus.
According to another embodiment of the invention, described two collimating plates are arranged symmetrically with.
According to still another embodiment of the invention, the sense of rotation of described two collimating plates is contrary.
According to still another embodiment of the invention, a plurality of collimation pin in each collimating plate are angularly spaced apart.Collimation pin is controlled to facilitate.
The present invention also provides one to comprise described Z-collimating apparatus x-ray imaging equipment.
As can be seen from such scheme, compare the first Z-collimating apparatus in background technology, the shielding material that Z-collimating apparatus of the present invention adopts is less, so reduce cost.And the collimation pin of each collimating plate of the present invention is angularly arranged, compare the second Z-collimating apparatus in background technology, the A/F of collimating slit more easily controls.In addition, Z-collimating apparatus of the present invention is arranged or is rotated in YZ plane, decreases the physical space of the frame taken in the X direction.Meanwhile, two collimating plates are identical, simplify the physical construction of collimating apparatus.
Accompanying drawing explanation
Embodiments of the invention will be described in detail by referring to accompanying drawing below, make clearer above-mentioned and other feature and advantage of the present invention of those skilled in the art, in accompanying drawing:
Fig. 1 is the schematic diagram of a kind of Z-collimating apparatus conventional in current CT scanner.
Fig. 2 is the schematic diagram of another kind of Z-collimating apparatus conventional in current CT scanner.
Fig. 3 is the schematic diagram of the CT scanner comprising Z-collimating apparatus of the present invention.
Fig. 4 is the right schematic diagram of the collimation pin of Z-collimating apparatus of the present invention.
Fig. 5 is the schematic diagram with Z-collimating apparatus adjustment collimating slit A/F of the present invention, and wherein Fig. 5 a is that Fig. 5 b is to the schematic diagram of the collimating slit formed by another collimation pin by pin is to the schematic diagram of the collimating slit formed surely.
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
The sweep length at 4 heart places in a scan
The collimating plate of 5 Z-collimating apparatuss of the present invention
6 rotation center of Z-collimating apparatus one collimating plate of the present invention and the distances 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, technical solutions and advantages of the present invention clearly, the present invention is described in more detail by the following examples.
For CT scanner, illustrate Z-collimating apparatus of the present invention.
When Fig. 3 is X ray fan beam angle β=0 of XY plane, comprise the schematic diagram of CT scanner in YZ plane of Z-collimating apparatus of the present invention.Z-collimating apparatus of the present invention comprises two rotatable collimating plates 5, these two collimating plates 5 are arranged symmetrically with in Z-direction, each collimating plate 5 comprises the collimation pin of a plurality of (Fig. 3 illustrates four) different length, in these two collimating plates 5, the collimation pin of equal length forms pin pair surely, often aim at pin to formation collimating slit, the A/F of each collimating slit is fixing, such as 0.94mm, 1.42mm, 2.66mm, 4.2mm, 7.45mm etc., this point is identical with the first collimating apparatus in background technology.
The X-ray beam that in Fig. 3, X-ray tube 9 sends, after the collimation of Z-collimating apparatus of the present invention, is received by detector 8.Wherein θ is X ray pencil-beam angle, its size is determined by the collimating slit A/F 7 of Z-collimating apparatus, the sweep length of the heart 10 in a scan of the X ray pencil-beam after collimation represents with Reference numeral 4, Reference numeral 6 is the distance between the rotation center of each collimating plate of Z-collimating apparatus and X-ray beam center, such as 25mm.
The material, shape, size etc. of two collimating plates 5 of Z-collimating apparatus of the present invention are all identical, and the shielding material that its material can be used with collimating apparatus in prior art is identical, such as tungsten.Preferably, a plurality of collimation pin in each collimating plate 5 are angularly spaced apart, control collimation pin to facilitate.
In Fig. 3, each collimation pin is polygon in the cross section of YZ plane, but its shape can change according to X ray fan beam angle β in X-direction, and β is generally [-28 °, 28 °].As shown in Figure 4, be the schematic diagram that Z-collimating apparatus pair of alignment pin of the present invention is right, wherein each collimation pin 11 is arc at the cross sectional shape of YZ plane.
Fig. 5 is the schematic diagram of the adjustment collimating slit A/F by Z-collimating apparatus of the present invention, and wherein horizontal ordinate is Z-direction, and ordinate is Y-direction.The collimating plate be made up of four collimations pin (12 ~ 15) is illustrated in Fig. 5 a and Fig. 5 b, the collimation pin number of in fact 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 collimating pin in each collimating plate.Sweep length 4 due to the difference object to be checked heart 10 does not in a scan wait, and selects suitable collimating slit A/F accordingly, is that the collimation pin that formed of two collimation pin 15 are to the collimating slit formed as what select in 5a.When scanning next object to be checked, rotate around the rotation center (axle) of each collimating plate by making collimation bottoms, to select suitable collimating slit A/F, as the collimation pin is in figure 5b rotated counterclockwise, the collimation pin on right side turns clockwise, and so just have selected another collimation pin of two collimation pin 13 formation to the collimating slit formed.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 large to the collimating slit A/F formed than the collimation pin of two collimation pin 15 formation to the A/F of the collimating slit formed, the collimation pin formed through two collimation pin 13 is just larger to the X ray pencil-beam angle of the collimating slit formed, and the object range to be checked of scanning is also just larger.
The present invention relates to field of medical device, particularly a kind of Z-collimating apparatus, it comprises two rotatable collimating plates in Z-direction, each collimating plate comprises the collimation pin of a plurality of different length, the collimation pin of equal length in described two collimating plates is made to form a collimation pin pair, to collimate by rotating.The present invention also provides a kind of x-ray imaging equipment comprising this Z-collimating apparatus.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a Z-collimating apparatus, it is characterized in that, described Z-collimating apparatus comprises two rotatable collimating plates (5) in Z-direction, each collimating plate comprises the collimation pin (12 ~ 15) of a plurality of different length, the collimation pin of equal length in described two collimating plates is made to form pin pair surely, to be formed with a collimating slit by rotating.
2. Z-collimating apparatus according to claim 1, is characterized in that, described two collimating plates are identical.
3. Z-collimating apparatus according to claim 1, is characterized in that, described two collimating plates are arranged symmetrically with.
4. Z-collimating apparatus according to claim 3, is characterized in that, the sense of rotation of described two collimating plates is contrary.
5. Z-collimating apparatus according to claim 1, is characterized in that, a plurality of collimation pin in each collimating plate are angularly spaced apart.
6. an x-ray imaging equipment, it comprises the Z-collimating apparatus as described in claim arbitrary in 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 CN102737748A (en) | 2012-10-17 |
| CN102737748B true 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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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6327960B2 (en) * | 2013-07-16 | 2018-05-23 | キヤノン株式会社 | Irradiation field limiting device, X-ray generation unit and X-ray imaging system provided with the same |
| CN114305478A (en) * | 2021-12-22 | 2022-04-12 | 明峰医疗系统股份有限公司 | Collimator, CT (computed tomography) equipment, calibration method and preparation method |
Citations (5)
| 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 |
| 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 |
| CN201387732Y (en) * | 2009-04-02 | 2010-01-20 | 深圳市华唯计量技术开发有限公司 | Collimator |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6396902B2 (en) * | 2000-07-31 | 2002-05-28 | Analogic Corporation | X-ray collimator |
| US7569826B2 (en) * | 2007-03-30 | 2009-08-04 | General Electric Company | Adjustable collimators method and system |
-
2011
- 2011-03-31 CN CN201110081593.5A patent/CN102737748B/en active Active
Patent Citations (5)
| 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 |
| 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 |
| CN201387732Y (en) * | 2009-04-02 | 2010-01-20 | 深圳市华唯计量技术开发有限公司 | Collimator |
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| CN102737748A (en) | 2012-10-17 |
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