CN1543290A - Emphasized sampling apparatus for optical center of X-ray machine automatic luminance stabilizing signal - Google Patents
Emphasized sampling apparatus for optical center of X-ray machine automatic luminance stabilizing signal Download PDFInfo
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- CN1543290A CN1543290A CNA2003101050137A CN200310105013A CN1543290A CN 1543290 A CN1543290 A CN 1543290A CN A2003101050137 A CNA2003101050137 A CN A2003101050137A CN 200310105013 A CN200310105013 A CN 200310105013A CN 1543290 A CN1543290 A CN 1543290A
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- sampler
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- 230000003287 optical effect Effects 0.000 title claims abstract description 28
- 238000005070 sampling Methods 0.000 title claims abstract description 19
- 230000000087 stabilizing effect Effects 0.000 title 1
- 230000007935 neutral effect Effects 0.000 claims abstract description 6
- 230000006641 stabilisation Effects 0.000 claims description 14
- 238000011105 stabilization Methods 0.000 claims description 14
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 4
- 229910000604 Ferrochrome Inorganic materials 0.000 claims description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 2
- 239000005357 flat glass Substances 0.000 claims description 2
- 238000012797 qualification Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- 239000000956 alloy Substances 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 208000019300 CLIPPERS Diseases 0.000 description 2
- 208000021930 chronic lymphocytic inflammation with pontine perivascular enhancement responsive to steroids Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009191 jumping Effects 0.000 description 2
- 238000002407 reforming Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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- Apparatus For Radiation Diagnosis (AREA)
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Abstract
This invention relates to an optical central sample device for getting automatic brightness stable signals in an image conversion device of a x-line unit including a sample lens and a photomultiplier tube or a photodiode characterizing in mounting a kind of light filter in front of the optical sampling device replacing the known diaphragm in which, the light filter may be a set composed of two filters with different central apertures or a neutral one of a glass filmed with NiCrFe alloy and the filming of which becomes thicker steadily from the center to the edge. The phenomena will not happen if uses this invented method that the switch beam limiter or a transmitted load density becomes larger suddenly or an image brightness picture changes suddenly which realizes automatic brightness stable signal quick tracing.
Description
Affiliated technical field
The present invention relates to a kind of medicine equipment, be specifically related to the optical centre that being used in the image reforming unit in the X line machine obtain the auto brightness stabilization signal and stress sampler.
Background technology
The structure of X line machine mainly comprises: image amplifier, image reforming unit, high-voltage generator, X ray tube and control desk.Auto brightness is stable to be an indispensable function of X line machine, also is an exigent function simultaneously.For the brightness that makes image amplifier output keeps within the specific limits, need carry out auto brightness control and automatic exposure control.The stable effect of auto brightness is to make the doctor when observing examinee's different parts, remains in the basicly stable brightness at the image that shows on the display monitor central monitoring system, helps doctor's observation and diagnosis like this.Reach this purpose, image and high pressure generator that need to gather are closed-loop systems, and the signal of image brightness will feed back to the high pressure generator system, make the intensity of X line can be along with examinee's different parts adjustment.
The extracting method of the picture signal that auto brightness is stable has multiple: the one, and the visible light of the cutout screen that strengthens from image uses PMT (photomultiplier) or photodiode to pick up, the 2nd, in the video signal of ccd video camera, pick up, also have and to pick up and to pick up from analog video signal etc. from digital video signal.
From Signal Processing speed, it is the fastest taking a sample from the visible light of the cutout screen of image amplifier, and vision signal (comprising analog signal and digital signal) sampling is slow slightly.Stable and the pace of change of the brightness that the important indicator of ABS (auto brightness is stable) is an image: promptly image is constant, brightness needs highly stable, not flicker, and when the information of image changed (examinee's position changes), image also will reach the brightness of standard with very fast speed.Like this, then requiring synchronously of the information at the signal of the feedback of high-pressure system and examinee's position is very high, and in the closed loop of feedback signal, the delay of processing speed can cause the decline of quality.
Key a bit is in the sampling technique, because the doctor more is concerned about the part at the center of image (image is round), area is 50-70%, so the sampling of picture centre more will meet doctor's requirement.In the present sampling mode, optical sampling mainly is to adopt adjustment to place the diaphragm of optical sampling device photomultiplier or photodiode front to select the radius of taking a sample.This device exists when switch beam-defining clipper and fluoroscopic load density strengthen suddenly, and the luminance graph jumping phenomenon can take place.The traditional method of head it off is: use the not brightness and contrast of same district of computed in software image, be weighted calculating, draw the auto brightness stabilization signal.This method sample rate is slow, and the tracking velocity of auto brightness stabilization signal and image brightness stability are all very low.
Summary of the invention
The objective of the invention is in order to overcome the defective that above-mentioned known technology exists, designing a kind of center that can obtain with image is the sampled signal that stresses, the optical sampling device of the brightness stability degree of the image of raising system and the auto brightness stabilization signal of information representation degree replaces the diaphragm in the known technology.
The optical centre of auto brightness stabilization signal of the present invention stresses device, comprise sampling lens and optical sampling device photomultiplier or photodiode, crucial technical measures are before the optical sampling device, and the filter of being thickeied gradually by middle mind-set edge by the different optical filter group of two center bores or a slice coating film thickness is housed at least.
The according to qualifications allocation plan of the optical filter group that above-mentioned center bore is different is: with the different filter (2a) of two center bores of superposeing (2b) and a slice center optical filter (2c) of not having an aperture form.The thickness of the optical filter in center bore difference and no aperture is 0.2-0.7mm, and the pore diameter range of filter (2a) is 2.7-3.2mm, and classical aperture value is 3.0mm, and the pore diameter range of filter (2b) is 2.0-2.7mm, and classical aperture value is 2.3mm.
The present invention adopts technique scheme, the light that can make arrival optics sensor devices is the middle section based on image, the neighboring area is auxilliary, the output signal of auto brightness stabilization signal has picture signal and stresses like this, promptly based on middle section, dge unloading is auxilliary, and the adjustment of high-pressure system just stresses to adjust with the sampling of image, reaches best clinical satisfaction.
The present invention and known technology compare, and its advantage with useful effect is: the present invention has adopted the filter combination of different apertures, and the thickness of monolithic filter is 0.2-0.7mm only, and is still very thin after the stack, is easy to install and fix; In addition, the aperture of filter, light transmittance and sheet number can be decided according to actual needs, and its combination is flexible, can form multiple assembled scheme.For plated film filter pockety, it installs and uses convenient, flexible equally.
The beneficial effect of maximum of the present invention is: owing to adopted the filter set or the plated film filter pockety of different aperture combination, substituted the diaphragm in the known technology, in the time, thereby switch beam-defining clipper or fluoroscopic load density can not take place strengthens suddenly, the image brightness picture jumping phenomenon; Faster than computed in software weighted sampling speed, realization brightness stability signal is followed the tracks of fast, has improved the tracking velocity and the image brightness stability of auto brightness stabilization signal greatly, with the intelligent image weighted sampling of physical method realization.
Description of drawings
Fig. 1, be that the present invention assembles schematic diagram;
Fig. 2, be the stack schematic diagram of the filter set formed of the filter that do not have the aperture by the different filter of two center bores and a slice among Fig. 1;
Fig. 3, be the schematic diagram after the filter stack among Fig. 2.
Among Fig. 1,2,3,1, the sampling lens, 2, filter, 3, photomultiplier or photodiode.The filter in 2a, 2b, footpath with holes, 2c, no aperture filter.
Embodiment
Example 1, choose the filter set of forming by three tablet filters, by filter (2a), (2b) and a slice in the two footpaths with holes filter in footpath with holes (2c) not, by Fig. 2 combination that puts in order, combination back filter set is assemblied on the fixture of photomultiplier front as shown in Figure 2.Above-mentioned selected filter (2a), (2b) aperture are respectively 3.0mm, 2.3mm, and filter thickness is 0.2mm, and three tablet filters are the gel neutral colour filter, and attenuation rate all gets 40%;
When adopting two tablet filters, remove filter (2c), filter (2a) and material (2b), aperture and attenuation rate are constant, and it is 40% gel neutral colour filter that filter still adopts attenuation rate.
Example 2, choose, be assemblied on the fixture of photodiode front by a slice sheet glass metallic nickel ferrochrome plated film neutral colour filter.The attenuation rate of above-mentioned plated film filter is that middle mind-set filter edge reduces gradually with the filter center, and the center attenuation rate is 100%, and the edge attenuation rate is 40%.Optical filter coating thickness thickness is no more than 1.5mm ± 0.1mm.
Claims (6)
1, the optical centre of X line machine auto brightness stabilization signal stresses sampler, comprise sampling lens and the optical sampling device that constitutes by photomultiplier or diode, it is characterized in that before the optical sampling device, filter being housed, can be at least by two optical filter groups that center bore is different, also can be the filter that a slice coating film thickness is thickeied gradually by middle mind-set edge.
2, the optical centre according to the described X line of claim 1 machine auto brightness stabilization signal stresses sampler, it is characterized in that the allocation plan according to qualifications of optical filter group that center bore is different is: with the different filter (2a) of two center bores of superposeing (2b) and a slice center optical filter (2c) of not having an aperture form.
3, the optical centre according to the described X line of claim 2 machine auto brightness stabilization signal stresses sampler, it is characterized in that three tablet filters are the gel neutral colour filter, and attenuation rate all gets 40%.
4, the optical centre according to claim 1 or 2 described X line machine auto brightness stabilization signals stresses sampler, the thickness that it is characterized in that the optical filter in center bore difference and no aperture is 0.2-0.7mm, the pore diameter range of filter (2a) is 2.7-3.2mm, classical aperture value is 3.0mm, the pore diameter range of filter (2b) is 2.0-2.7mm, and classical aperture value is 2.3mm.
5, the optical centre according to the described X line of claim 1 machine auto brightness stabilization signal stresses sampler, it is characterized in that coating film thickness by the filter that middle mind-set edge thickeies gradually, is to adopt sheet glass metallic nickel ferrochrome plated film neutral colour filter.
6, the optical centre according to claim 1 or 5 described X line machine auto brightness stabilization signals stresses sampler, it is characterized in that the filter that coating film thickness is thickeied gradually by middle mind-set edge, attenuation rate is that middle mind-set filter edge reduces gradually with the filter center, the center attenuation rate is 100%, the edge attenuation rate is 40%, and filter thickness thickness is no more than 1.5mm ± 0.1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310105013 CN1265682C (en) | 2003-11-06 | 2003-11-06 | Emphasized sampling apparatus for optical center of X-ray machine automatic luminance stabilizing signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310105013 CN1265682C (en) | 2003-11-06 | 2003-11-06 | Emphasized sampling apparatus for optical center of X-ray machine automatic luminance stabilizing signal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1543290A true CN1543290A (en) | 2004-11-03 |
| CN1265682C CN1265682C (en) | 2006-07-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200310105013 Expired - Fee Related CN1265682C (en) | 2003-11-06 | 2003-11-06 | Emphasized sampling apparatus for optical center of X-ray machine automatic luminance stabilizing signal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104516182A (en) * | 2014-12-17 | 2015-04-15 | 广东威创视讯科技股份有限公司 | Lighting system, projector and back projection system |
-
2003
- 2003-11-06 CN CN 200310105013 patent/CN1265682C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104516182A (en) * | 2014-12-17 | 2015-04-15 | 广东威创视讯科技股份有限公司 | Lighting system, projector and back projection system |
| CN104516182B (en) * | 2014-12-17 | 2016-05-25 | 广东威创视讯科技股份有限公司 | A kind of illuminator, projector and back-projection system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1265682C (en) | 2006-07-19 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| ASS | Succession or assignment of patent right |
Owner name: PHILIPS ( CHINA )INVESTMENT CO., LTD. Free format text: FORMER OWNER: DONGRUI DIGITAL MEDICAL SYSTEM CO., LTD., SHENYANG Effective date: 20041105 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Effective date of registration: 20041105 Address after: 218 West Tianmu Road, 20-22 floor, Ding Yong, Shanghai Applicant after: Philips (China) Investment Co.,Ltd. Address before: Liaoning Province, Shenyang City, Shenyang Hunnan hi tech Industrial Development Zone, East Software Park Applicant before: Philips and Neusoft Medical Systems Co. |
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Owner name: PHILIPS AND NEUSOFT MEDICAL SY Free format text: FORMER OWNER: PHILIPS ( CHINA )INVESTMENT CO., LTD. Effective date: 20050819 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Effective date of registration: 20050819 Address after: Hunnan New Century Road 110179 Shenyang city of Liaoning Province, No. 16 Applicant after: Philips and Neusoft Medical System Co.,Ltd. Address before: 200070, 218 West Tianmu Road, Shanghai, 20-22 floor, Ding Yong Applicant before: Philips (China) Investment Co.,Ltd. |
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Owner name: DONGRUAN MEDICAL SYSTEMS CO., LTD., SHENYANG Free format text: FORMER OWNER: DONGRUAN PHILIPS MEDICAL EQUIPMENT AND SYSTEM CO., LTD. Effective date: 20140212 |
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| TR01 | Transfer of patent right |
Effective date of registration: 20140212 Address after: Hunnan New Century Road 110179 Shenyang city of Liaoning Province, No. 16 Patentee after: SHENYANG NEUSOFT MEDICAL SYSTEMS Co.,Ltd. Address before: Hunnan New Century Road 110179 Shenyang city of Liaoning Province, No. 16 Patentee before: Philips and Neusoft Medical System Co.,Ltd. |
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Address after: 110179 No. 177-1 Innovation Road, Hunnan District, Shenyang City, Liaoning Province Patentee after: Shenyang Neusoft Medical Systems Co.,Ltd. Address before: Hunnan New Century Road 110179 Shenyang city of Liaoning Province, No. 16 Patentee before: SHENYANG NEUSOFT MEDICAL SYSTEMS Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060719 Termination date: 20211106 |
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| CF01 | Termination of patent right due to non-payment of annual fee |