CN105640581A - Oral cavity CT front X-ray filter - Google Patents
Oral cavity CT front X-ray filter Download PDFInfo
- Publication number
- CN105640581A CN105640581A CN201610110320.1A CN201610110320A CN105640581A CN 105640581 A CN105640581 A CN 105640581A CN 201610110320 A CN201610110320 A CN 201610110320A CN 105640581 A CN105640581 A CN 105640581A
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- China
- Prior art keywords
- grid
- ray
- oral cavity
- line device
- filter line
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- 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.)
- Pending
Links
- 210000000214 mouth Anatomy 0.000 title claims abstract description 15
- 210000002615 epidermis Anatomy 0.000 claims description 4
- 230000005855 radiation Effects 0.000 abstract description 5
- 238000001914 filtration Methods 0.000 abstract 9
- 239000010410 layer Substances 0.000 abstract 3
- 239000002344 surface layer Substances 0.000 abstract 2
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 2
- 210000001519 tissue Anatomy 0.000 description 2
- 239000008346 aqueous phase Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000003759 clinical diagnosis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 210000001624 hip Anatomy 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 210000002832 shoulder Anatomy 0.000 description 1
- 210000003491 skin Anatomy 0.000 description 1
- 210000001154 skull base Anatomy 0.000 description 1
- 210000004872 soft tissue Anatomy 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/10—Safety means specially adapted therefor
- A61B6/107—Protection against radiation, e.g. shielding
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/44—Constructional features of apparatus for radiation diagnosis
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/52—Devices using data or image processing specially adapted for radiation diagnosis
- A61B6/5258—Devices using data or image processing specially adapted for radiation diagnosis involving detection or reduction of artifacts or noise
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Medical Informatics (AREA)
- Radiology & Medical Imaging (AREA)
- Molecular Biology (AREA)
- Biophysics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Optics & Photonics (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- High Energy & Nuclear Physics (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Apparatus For Radiation Diagnosis (AREA)
Abstract
The invention discloses an oral cavity CT front X-ray filter which comprises a body and is characterized in that X-ray filtering grids which are distributed in a combined mode are arranged on the body; each X-ray filtering grid comprises an upper surface layer and a lower surface layer which are connected integrally. The oral cavity CT front X-ray filter has the advantages that due to the design of the combined X-ray filtering grids, the distribution mode of the top layer X-ray filtering grid, the middle layer X-ray filtering grid and the bottom layer X-ray filtering grid is changed, the ray intensity distribution is optimized and adjusted, and the radiation dosage suffered by a patient is reduced by regulating the ray intensity in a more accurate mode; meanwhile the X-ray filtering grids are connected in a combined and nesting mode, and therefore it is guaranteed that the combined X-ray filtering grids are stable and reliable, implementation is convenient, time for replacing and adjusting the X-ray filtering grids is saved, and the waiting time of a patient is shortened.
Description
Technical field
The present invention relates to a kind of preposition filter line device of oral cavity CT, belong to filter line device technical field.
Background technology
CT is the product that electronic computer combines with X-ray technique, is provided that details 2D clearly, 3D rendering, and price is relatively cheap, doctor makes rapidly clinical diagnosis and provides a great help. But X-ray source used in CT is not all monochromatic source, but has the X-ray source of certain spectrum width, and namely x-ray photon energy differs. Absorptance reduces with the increase of x-ray energy, and this means that high-energy photon decay is little, and lower energy photon decay is big, therefore produces " cup-shaped " artifact on image after reconstruction, and this artifact is known as x-ray hardening artifact. In causing x-ray to project due to X-ray beam hardening effect, data is inconsistent, and thick filaments of sun shadow occurs in the middle of bone structure image in result. This depend on the passed tissue of X-ray beam density and
Thickness. For the tissue such as soft tissue that body part density and aqueous phase are near, this impact on CT image can be compensated for. But the region that such as hip, shoulder, basis cranii, oral cavity etc. in high density area, strip artifact and CT value reduce is visible. The way solving this artifact is to adopt compensation filter line device or change algorithm for reconstructing parameter to arrange and make these artifact effects reduce. Reasonably filter line device is adopted to enable to subsequent software process more easy.
Preposition filter line device can also reach the imaging effect of the best by optimizing the distribution of X-ray intensity. Arriving during detector no longer uniform after passing through patient due to equally distributed X ray, the signal that core detects is markedly less than edge, affects the total quality of image; If the signal improving centre will make the quantity of X-rays X of marginal portion increase, bring unnecessary skin dose to patient. In order to be able to solve this problem, it is possible to the shape of design filter line device so that marginal ray intensity is weaker than center, the transmitted intensity being arrived detector by patient is comparatively uniform, thus improving the dynamic range of detector.
Preposition filter line device also has great role for suppressing ray scattering. Sector/taper ray produces a large amount of scatterings at patient body's edge, causes unnecessary radiation dose, in order to reduce radiation damage, it is possible to weaken the transmitted intensity of edge, thus reducing radiation dose.
Traditional CT preposition filter line device has its corresponding shortcoming, it is for specific die body because the thickness of its design changes, therefore when imaging object shape has change, often realize the adjustment to transmitted intensity only by the position changing filter line device or change filter line device, adjustment amplitude is very limited, can only be more data-optimized than time without filter line device, the state of relative ideal can not be reached.
Summary of the invention
It is an object of the invention to the defect overcoming prior art to exist, it is proposed to a kind of preposition filter line device of oral cavity CT.
The present invention adopts the following technical scheme that a kind of preposition filter line device of oral cavity CT, including body, it is characterised in that be provided with the grid of combination distribution on described body, and described grid includes upper epidermis and the layer that one connects.
Preferably, grid be shaped as square or circular or oval.
Preferably, grid includes setting gradually top layer grid, intermediate layer grid, bottom grid.
Preferably, the radial dimension of top layer grid is more than the radial dimension of intermediate layer grid, and the radial dimension of intermediate layer grid is more than the radial dimension of bottom grid.
Preferably, top layer grid, intermediate layer grid, bottom grid arrangement mode be from top to bottom or from bottom to top or spaced apart.
Preferably, top layer grid, intermediate layer grid, adopt between bottom grid combined nesting to connect.
The beneficial effect that the present invention reaches: the present invention design by combination type grid, change the arrangement mode of top layer grid, intermediate layer grid, bottom grid, thus ray density distribution is optimized adjustment, and by finer adjustment transmitted intensity, reduce radiation dose suffered by patient; Grid adopts combined nesting to connect simultaneously, thus ensureing the reliable and stable of combination type grid, and convenient realization, save and change the time adjusting grid, thus reducing patient's waiting time.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the structural representation of the grid of the present invention.
The implication of labelling in figure: 1-body, 2-top layer grid, 3-top layer grid, 4-top layer grid, 5-upper epidermis, 6-layer.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described. Following example are only for clearly illustrating technical scheme, and can not limit the scope of the invention with this.
Fig. 1 is the structural representation of the present invention, and Fig. 2 is the structural representation of the grid of the present invention, and the present invention proposes a kind of preposition filter line device of oral cavity CT, including body 1, it is characterized in that, body 1 is provided with the grid of combination distribution, grid includes upper epidermis 5 and the layer 6 that one connects.
As a kind of preferred embodiment, being shaped as of grid is square or circular or oval.
Top layer grid 2 that grid includes setting gradually, intermediate layer grid 3, bottom grid 4; The radial dimension of top layer grid 2 is more than the radial dimension of intermediate layer grid 3, and the radial dimension of intermediate layer grid 3 is more than the radial dimension of bottom grid 4; Top layer grid 2, intermediate layer grid 3, bottom grid 4 arrangement mode be from top to bottom or from bottom to top or spaced apart.
As a kind of preferred embodiment, combined nesting between top layer grid 2, intermediate layer grid 3, bottom grid 4, is adopted to connect.
The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the technology of the present invention principle; can also making some improvement and deformation, these improve and deformation also should be regarded as protection scope of the present invention.
Claims (6)
1. the preposition filter line device of oral cavity CT, including body (1), it is characterised in that be provided with the grid of combination distribution on described body (1), and described grid includes upper epidermis (5) and the layer (6) that one connects.
2. a kind of preposition filter line device of oral cavity CT according to claim 1, it is characterised in that being shaped as of described grid is square or circular or oval.
3. a kind of preposition filter line device of oral cavity CT according to claim 2, it is characterised in that top layer grid (2) that described grid includes setting gradually, intermediate layer grid (3), bottom grid (4).
4. a kind of preposition filter line device of oral cavity CT according to claim 3, it is characterized in that, the radial dimension of described top layer grid (2) is more than the radial dimension in described intermediate layer grid (3), and the radial dimension in described intermediate layer grid (3) is more than the radial dimension of described bottom grid (4).
5. a kind of preposition filter line device of oral cavity CT according to claim 4, it is characterized in that, described top layer grid (2), described intermediate layer grid (3), described bottom grid (4) arrangement mode be from top to bottom or from bottom to top or spaced apart.
6. a kind of preposition filter line device of oral cavity CT according to claim 5, it is characterised in that adopt combined nesting to connect between described top layer grid (2), described intermediate layer grid (3), described bottom grid (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610110320.1A CN105640581A (en) | 2016-02-29 | 2016-02-29 | Oral cavity CT front X-ray filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610110320.1A CN105640581A (en) | 2016-02-29 | 2016-02-29 | Oral cavity CT front X-ray filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105640581A true CN105640581A (en) | 2016-06-08 |
Family
ID=56492511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610110320.1A Pending CN105640581A (en) | 2016-02-29 | 2016-02-29 | Oral cavity CT front X-ray filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105640581A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060072705A1 (en) * | 2004-10-01 | 2006-04-06 | Varian Medical Systems Technologies, Inc. | Devices and methods for providing spatially variable x-ray beam intensity |
| CN102512194A (en) * | 2003-10-27 | 2012-06-27 | Ge医疗系统环球技术有限公司 | Method and apparatus of radiographic imaging with an energy beam tailored for a subject to be scanned |
| CN103093850A (en) * | 2011-10-31 | 2013-05-08 | Ge医疗系统环球技术有限公司 | Filter assembly used for computer tomography system and computer tomography system |
| CN103839603A (en) * | 2012-11-27 | 2014-06-04 | Ge医疗系统环球技术有限公司 | CT collimator and CT system comprising same |
| CN104127198A (en) * | 2014-07-10 | 2014-11-05 | 中国科学院苏州生物医学工程技术研究所 | Front line filter for CT |
| CN205649511U (en) * | 2016-02-29 | 2016-10-19 | 江苏美伦影像系统有限公司 | Leading line ware of straining of oral cavity CT |
-
2016
- 2016-02-29 CN CN201610110320.1A patent/CN105640581A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102512194A (en) * | 2003-10-27 | 2012-06-27 | Ge医疗系统环球技术有限公司 | Method and apparatus of radiographic imaging with an energy beam tailored for a subject to be scanned |
| US20060072705A1 (en) * | 2004-10-01 | 2006-04-06 | Varian Medical Systems Technologies, Inc. | Devices and methods for providing spatially variable x-ray beam intensity |
| CN103093850A (en) * | 2011-10-31 | 2013-05-08 | Ge医疗系统环球技术有限公司 | Filter assembly used for computer tomography system and computer tomography system |
| CN103839603A (en) * | 2012-11-27 | 2014-06-04 | Ge医疗系统环球技术有限公司 | CT collimator and CT system comprising same |
| CN104127198A (en) * | 2014-07-10 | 2014-11-05 | 中国科学院苏州生物医学工程技术研究所 | Front line filter for CT |
| CN205649511U (en) * | 2016-02-29 | 2016-10-19 | 江苏美伦影像系统有限公司 | Leading line ware of straining of oral cavity CT |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160608 |