CN104665767A - Auxiliary blood vessel positioning device - Google Patents
Auxiliary blood vessel positioning device Download PDFInfo
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- CN104665767A CN104665767A CN201310632251.7A CN201310632251A CN104665767A CN 104665767 A CN104665767 A CN 104665767A CN 201310632251 A CN201310632251 A CN 201310632251A CN 104665767 A CN104665767 A CN 104665767A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
- A61B5/0082—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
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Abstract
The invention discloses an auxiliary blood vessel positioning device. The auxiliary blood vessel positioning device comprises an infrared emitting device for emitting infrared rays and irradiating the infrared rays to a body to be detected, an infrared acquiring device for acquiring infrared rays reflected or transmitted by the body to be detected and forming an infrared image signal, an image signal processing device for receiving and processing the infrared image signal and connected with the infrared acquiring device and a display device for displaying the infrared image signal, wherein emitted infrared rays are located in a wave band ranging from 830 nm to 870 nm, the image signal processing device conducts extraction, strengthening and deformity correction on the infrared image signal formed by the infrared acquiring device, and the display device is a liquid crystal display monitor or a miniature projector. When the auxiliary blood vessel positioning device distinguishes the blood vessel of the body to be detected, formed images are clear, response is sensitive, and the blood vessel positioning efficiency and accuracy of a medical worker are greatly improved.
Description
Technical field
The present invention relates to a kind of Medical Instruments, in particular to a kind of blood vessel auxiliary locator.
Background technology
Current medical personnel puncture to vein blood vessel mainly through visual, but for child, fat personnel and the unconspicuous patient of vein blood vessel, visual puncture is difficult to ensure to hit the nail on the head, thus causes repeatedly puncturing, and easily produces malpractice, causes doctor-patient dispute.For critical patient because blood pressure reduces, especially there is the difficult problem that vein blood vessel is difficult to find, even can miss rescue good opportunity in vasoconstriction.
Near infrared light is the optical window of human body, deoxygenated blood red eggs in blood have strong absorption near infrared light, therefore blood vessel obviously will be better than the absorption of common skin to infrared light to the absorption of near infrared light, this difference to near-infrared absorption intensity can produce near-infrared optical image contrast through process, thus likely produces corresponding instrument to indicate the position of blood vessel.
Application for a patent for invention 201110266943.5 discloses a kind of display packing of superficial blood vessel, have employed more a lot of inclined and analyzing polaroid, optical signalling is after repeatedly playing inclined and analyzing, signal attenuation is serious, therefore CCD or the CMOS sensitive chip requiring image acquisition used has very high photosensitive responsiveness near infrared band, improves equipment cost and design difficulty undoubtedly.Application for a patent for invention 201110233371.0 discloses a kind of Portable blood vessel display lamp, adopt the high-pass filtering sheet of 900-1200nm, first this wave band infrarede emitting diode is of little use, need customization, luminous a big chunk is converted into heat energy, and luminous efficiency is low, CCD and CMOS is also corresponding very low in the intrinsic photosensitive responsiveness of this wave band simultaneously, the superficial blood vessel degree of depth mentioned also only has 1-1.5mm, inapplicable for obese patient.Application for a patent for invention 201010614081.6 discloses a kind of superficial blood vessel indicator, color Doppler and infra-red heat scanning combine by this instrument, design comparatively complicated difficult with microminiaturization, this patent does not adopt picture signal intensifier and respective algorithms simultaneously, there is blood vessel peripheral muscle tissue interfering signal during imaging, cause blood vessel to show unintelligible.
Summary of the invention
The object of this invention is to provide a kind of blood vessel auxiliary locator, when this device differentiates body blood vessel to be detected, imaging clearly, is quick on the draw, and substantially increases efficiency and the accuracy of medical personnel's localization of blood vessel.
For achieving the above object, the present invention takes following technical scheme:
A kind of blood vessel auxiliary locator, is characterized in that described device comprises:
A (), for launching infrared ray and being irradiated to the infrared transmitting device on body to be detected, the infrared ray launched is positioned at 830 ~ 870nm wave band;
B () is for gathering the infrared ray of body to be detected reflection or transmission and forming the infrared collection device of IR image signals;
C (), for receiving and processing IR image signals and the image signal processing apparatus be connected with described infrared collection device, this device carries out extraction to the IR image signals that infrared collection device is formed and strengthens and deformity correction;
D (), for showing the display device of IR image signals, described display device adopts LCD monitor or minitype projection machine.
Described infrared transmitting device is infrared array light source or NIR solid state laser, outside described NIR solid state laser, light guide plate is housed.
Described infrared collection device comprises camera lens and CCD or CMOS type imaging device.
Described camera lens installs arrowband infrared filter additional before having infrared narrow-band filtering coating or camera lens, and the model that described CCD selects is ICX255AL, ICX285AL, or CMOS1089.
Projection is thrown on body to be detected by described minitype projection machine.
First digital signal is converted to through analog-digital chip after described image signal processing apparatus receiving infrared-ray picture signal, then through FPGA picture processing chip, the process of collection limit, limit is realized to digital signal, and signal is strengthened and malformation correction, control described LCD monitor or minitype projection machine output finally by dsp chip.
As can be seen from above-mentioned technical scheme, this device middle infrared (Mid-IR) discharger is infrared array light source or NIR solid state laser, outside described NIR solid state laser, light guide plate is housed, to launch infra-red intensity high and evenly luminous, arrowband infrared filter is installed additional before the camera lens of infrared collection device has infrared narrow-band filtering coating or camera lens, effectively can get rid of visible ray, be conducive to effective signal acquisition, select CCD or the CMOS type imaging device to infrared sensitive specially simultaneously, stronger digital signal can be formed, date processing after being conducive to.During signal processing, FPGA picture processing chip is adopted to realize the process of collection limit, limit to digital signal, improve the sensitivity of whole device reaction, and strengthen process through signal, be conducive to forming image more clearly, the most handy minitype projection machine realizes in-situ projection, is convenient to the accurate localization of blood vessel of medical personnel, or adopt the way of output of liquid crystal display, intuitively practical.
Accompanying drawing explanation
Fig. 1 is this blood vessel auxiliary locator structural representation;
Fig. 2 is image signal processing apparatus structural representation;
Fig. 3 is image procossing and strengthens correction algorithm flow chart;
Fig. 4 is in-situ projection option A schematic diagram;
Fig. 5 is in-situ projection option b schematic diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing, invention is described further:
As shown in Figure 1, infrared transmitting device 1 is for launching the infrared ray of 830 ~ 870nm wave band as light source, specifically can select infrared array light source or NIR solid state laser, if adopt NIR solid state laser, in order to strengthen luminous uniformity, need to load onto light guide plate outside NIR solid state laser, the infrared ray radiation that infrared transmitting device 1 is launched is to (body 2 to be detected mostly is the limbs such as the back of the hand, arm) on body 2 to be detected, and on body 2 to be detected occur launch or transmission, reflection or transmitted ray gather by infrared collection device 3.Infrared collection device 3 is by camera lens and CCD (Charge-coupled Device, charge coupled cell) or CMOS type imaging device composition, in order to strengthen ultrared selectivity, camera lens scribbles infrared narrow-band filtering coating, or install arrowband infrared filter before camera lens, CCD selects the CCD to infrared ray responsive, if model is ICX255AL, ICX285AL, or CMOS1089.After infrared collection device 3 gathers, obtain the IR image signals of simulating, then the IR image signals of simulation is passed to image signal processing apparatus 4 and process, the structure of image processing apparatus 4 as shown in Figure 2.
First the IR image signals of simulation converts digital signal to through analog-digital chip, then FPGA picture processing chip is sent to through video interface, FPGA picture processing chip processes in real time to digital signal, algorithm is voted in employing makes image acquisition and image operation walk abreast, give full play to FPGA device parallel characteristic, significantly improve image processing speed, contrast reinforcement can be carried out to the video image collected, the image implementation processed be exported in real time simultaneously.Above-mentioned image operation and image acquisition have walked abreast, refer to image acquisition to complete, image operation also just completes simultaneously, this requirement must complete pixel computing within a pixel cycle, making full use of the blanking time completes image operation, does not calculate refinement point coordinates, direct computational geometry correct after coordinate, first image binaryzation, then graph thinning and Geometry rectification.It is carry out in real time that the advantage of this image procossing mode has be image procossing at two: one, and image operation and image acquisition have walked abreast, and substantially increase image processing speed; Two are image procossing is real-time process, instead of processes afterwards, does not need storage figure picture, only needs stores processor result, thus greatly reduced Storage and Processing data volume, improve operational efficiency.FPGA picture processing chip is connected with Industrial PC Computer by pci bus, realizes implanting the algorithm of FPGA picture processing chip and controlling by Industrial PC Computer.FPGA picture processing chip is connected with two random access memory rams 1 and RAM2, for depositing view data temporarily.FPGA picture processing chip is connected with DSP picture processing chip through dsp interface, exports display device 5 to for what control image.
Fig. 3 gives the particular flow sheet of image processing algorithm, and this process comprises:
(1) power on, FPGA, DSP initialize.
(2) after FPGA initializes, FPGA reads configuration data from PROM, the analog video signal of pal mode is converted to the digital signal meeting BT.656 standard after success to be configured by A/D conversion chip TVP5150, input FPGA process; Otherwise proceed configuration.
(3) FPGA is stored into data image signal inside SRAM, and DSP can the data conversion storage in SRAM in SDRAM.DSP initial configuration, then carries out initial configuration to SAA7221.Judge whether after having initialized to carry out the process to view data, if will to image real time transfer, then DSP reads image data from SDRAM processes.
(4) DSP receives data and carries out gray scale algorithm process, the view data handled well is stored, again edge extracting is carried out to data, the data storing carrying out edge extracting, inverse algorithm process is carried out to data, the data storing handled well, last DSP control SAA7221, changes into CVBS signal datagraphic information and outputs to projector.
Memory device on image card comprises: SRAM (the Static Random Access Memory of two pieces of 512K × 16bits, SRAM), SDRAM (the Synchronous Dynamic Random Access Memory of two pieces of 4M × 32bits, synchronous DRAM), the DDR memorizer of one piece of 32M × 16bits, the flash storage of one piece of 4M × 8bits (can power-off preserve data).Do not use DDR memorizer herein.Two pieces of SRAM are FPGA to the main thoroughfare of DSP transmitted image data and result.FPGA by the view data of present frame and result write wherein one piece of SRAM time, DSP can read view data and the result of previous frame from another block SRAM, and carries out post-treatment operations.Therefore, FPGA and DSP can concurrent working.
Image card has two-way analog video input interface, namely develops " left video mouth " and " right video port " (being also called " video port A " and " video port B ") in version.The analog video signal of pal mode is converted to by A/D conversion chip TVP5150 the digital signal meeting BT.656 standard, input FPGA process.The pin of FPGA is connected with two pieces of SRAM, can by raw image data and result stored in SRAM.The pin of DSP and FPGA is connected, and both can access the storage resources in FPGA sheet, also can by the SRAM outside the logic configuration access FPGA sheet of FPGA.Logic circuit in FPGA also directly can receive the data that also processing DSP is sent here." gigabit Ethernet " network interface in exploitation version can connect high-speed digital photography head; And the analog video signal of pal mode can be exported to monitor by " analog video signal output " mouth or projector (this is a kind of television format signal) shows.
Display device 5 adopts minitype projection machine, by the image in-situ projection extremely body 2 to be detected generated, image medium vessels position adopts and adds ash display, can overlap with the vascular site of body 2 to be detected, thus realize the location of blood vessel, display device 5 also can adopt liquid crystal display, directly the image of generation is shown on a liquid crystal display, when having an acupuncture treatment to blood vessel, syringe needle also can show on a liquid crystal display, thus positions according to the actual vessel that the relative position of syringe needle on liquid crystal display and blood vessel treats detection bodies 2.
In-situ projection realizes there are two kinds of methods:
Option A: NIR throws light on one piece of specific region, such as square region, just in time cover the back of the hand, infrared photography gathers this regional imaging, visible ray is become to export through projection transform, its output area strictly will be thrown into and coincide with NIR illuminated area, and after square frame strictly coincide, the projected image of square frame inside also will coincide with material object.
Option b: same object can become two pictures through reflection with refraction, the camera lens of thermal camera and scialyscope is placed on reflection respectively and reflects the position of alleged picture, according to light path inverting, as long as vascular site enters thermal camera camera lens acquisition range, so scialyscope output image must at real blood vessels position.During use, human eye to infrared invisible, but looks for blood vessel according to projected position, project out blood vessel time, infrared lens also targeted by vascular site naturally.
Above-described embodiment is just to an explanation of the present invention, instead of restriction, and under design of the present invention, any technical scheme without essence conversion, all by the protection of patent of the present invention.
Claims (6)
1. a blood vessel auxiliary locator, is characterized in that described device comprises:
A (), for launching infrared ray and being irradiated to the infrared transmitting device on body to be detected, the infrared ray launched is positioned at 830 ~ 870nm wave band;
B () is for gathering the infrared ray of body to be detected reflection or transmission and forming the infrared collection device of IR image signals;
C (), for receiving and processing IR image signals and the image signal processing apparatus be connected with described infrared collection device, this device carries out extraction to the IR image signals that infrared collection device is formed and strengthens and deformity correction;
D (), for showing the display device of IR image signals, described display device adopts LCD monitor or minitype projection machine.
2. blood vessel auxiliary locator as claimed in claim 1, it is characterized in that, described infrared transmitting device is infrared array light source or NIR solid state laser, outside described NIR solid state laser, light guide plate is housed.
3. blood vessel auxiliary locator as claimed in claim 1, it is characterized in that, described infrared collection device comprises camera lens and CCD or CMOS type imaging device.
4. blood vessel auxiliary locator as claimed in claim 3, it is characterized in that, described camera lens installs arrowband infrared filter additional before having infrared narrow-band filtering coating or camera lens, and the model that described CCD selects is ICX255AL, ICX285AL, or CMOS1089.
5. the blood vessel auxiliary locator as described in any one of Claims 1-4, is characterized in that, projection is thrown on body to be detected by described minitype projection machine.
6. blood vessel auxiliary locator as claimed in claim 5, it is characterized in that, first digital signal is converted to through analog-digital chip after described image signal processing apparatus receiving infrared-ray picture signal, then through FPGA picture processing chip, the process of collection limit, limit is realized to digital signal, and signal is strengthened and malformation correction, control described LCD monitor or minitype projection machine output finally by dsp chip.
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| CN201310632251.7A CN104665767A (en) | 2013-12-03 | 2013-12-03 | Auxiliary blood vessel positioning device |
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| CN201310632251.7A CN104665767A (en) | 2013-12-03 | 2013-12-03 | Auxiliary blood vessel positioning device |
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Cited By (2)
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| CN109247910A (en) * | 2017-07-12 | 2019-01-22 | 京东方科技集团股份有限公司 | Blood tube display apparatus and blood vessel display method |
| CN110420011A (en) * | 2019-08-07 | 2019-11-08 | 杭州泽铭睿股权投资有限公司 | A kind of video camera with blood spectroscopic optics image imaging function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109247910A (en) * | 2017-07-12 | 2019-01-22 | 京东方科技集团股份有限公司 | Blood tube display apparatus and blood vessel display method |
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| CN110420011A (en) * | 2019-08-07 | 2019-11-08 | 杭州泽铭睿股权投资有限公司 | A kind of video camera with blood spectroscopic optics image imaging function |
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| US11998353B2 (en) | 2019-08-07 | 2024-06-04 | Hangzhou Zemingrui Equity Investment Co., Ltd. | Camera having transdermal optical imaging function |
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Application publication date: 20150603 |