CN105725978B - The point-to-point imaging system of near-infrared peripheral vascular - Google Patents
The point-to-point imaging system of near-infrared peripheral vascular Download PDFInfo
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- CN105725978B CN105725978B CN201610243381.5A CN201610243381A CN105725978B CN 105725978 B CN105725978 B CN 105725978B CN 201610243381 A CN201610243381 A CN 201610243381A CN 105725978 B CN105725978 B CN 105725978B
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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
- A61B5/0062—Arrangements for scanning
- A61B5/0064—Body surface scanning
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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
- A61B5/0075—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence by spectroscopy, i.e. measuring spectra, e.g. Raman spectroscopy, infrared absorption spectroscopy
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/06—Accessories for medical measuring apparatus
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- Heart & Thoracic Surgery (AREA)
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- Biomedical Technology (AREA)
- Veterinary Medicine (AREA)
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The invention discloses a kind of point-to-point imaging systems of near-infrared peripheral vascular, including processor, camera, projector and optical filter；The processor is connect with camera and projector respectively；The optical filter and imaging object surface are arranged in 45 degree of angles, and the light inlet of the camera and the light-emitting window of projector are symmetrical arranged about the optical filter；The field angle of the camera is equal with the field angle of the projector；The projector deflection first angle θ setting, the first angle θ are determined according to the field angle and projector off-axis of projector.By projector deflection first angle setting, projector off-axis is eliminated, projection accuracy is improved；Projected image can be made to be completely coincident with real image, realize point-to-point imaging；By projecting on body surface blood-vessels point-to-pointly, so that medical staff is can easily acknowledge that the position of blood vessel, facilitate successive treatment.
Description
Technical field
The present invention relates to the point-to-point imaging field of medicine body surface more particularly to a kind of point-to-point imagings of near-infrared peripheral vascular
System.
Background technique
Current point-to-point light path system is mainly used in near-infrared peripheral vascular technical field of imaging.It is imaged using near-infrared
Machine acquires body surface train of thought information, enhanced body surface train of thought information is obtained by image algorithm enhancing platform, finally by projection
Instrument is by enhanced body surface train of thought information projection to skin surface.The registration of body surface train of thought projected image and practical train of thought, takes
Certainly in the accuracy of point-to-point light path system.
In the Chinese patent open file of Publication No. CN104605819A, propose aobvious for near-infrared vein blood vessel
As the device and method of point-to-point projection.It images the device of point-to-point projection for near-infrared vein blood vessel, including projector, takes the photograph
As head, projector, camera are all installed on shell, projector and camera control unit, camera court are also equipped in shell
To imaging object surface, projector and camera control are sent to for shooting to look-out station, and by captured image data
Unit processed, projector and camera control unit are by the original image of acquisition, by Digital Image Processing, output signal；Projector
For receiving projector and camera control unit runs off vascular the digital signals of contour images, and project image objects table
Face；Near-infrared light source is installed on shell, and near-infrared light source is to imaging object surface throw light.
However on actual market, there are off-axis, i.e. offset ≠ 0% for most of projectors, such as Fig. 1 (b), Fig. 1 (c) and figure
Shown in 1 (d), wherein the calculation formula of the off-axis of Fig. 1 (a), Fig. 1 (b) and Fig. 1 (c) is offset=(A-B)/A, Fig. 1's (d)
The calculation formula of off-axis is offset=(A+B)/A；Therefore, the off-axis offset in Fig. 1 (b) is inclined in 80%, Fig. 1 (c)
Axis offset is that the off-axis offset in 100%, Fig. 1 (d) is 120%, and the off-axis offset in Fig. 1 (a) is 0%, i.e., not
The case where there are off-axis.
Because there are off-axis for most of projectors, it is difficult to meet actual demand, and practical camera and projector field angle
It is difficult to ensure that strict conformance.
Summary of the invention
The technical problems to be solved by the present invention are: a kind of point-to-point imaging system of near-infrared peripheral vascular, improves projection
Accuracy, it is ensured that body surface train of thought projected image is completely coincident with practical train of thought.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention are as follows: a kind of near-infrared peripheral vascular is point-to-point
Imaging system, including processor, camera, projector and optical filter；The processor is connect with camera and projector respectively；
The optical filter and imaging object surface are arranged in 45 degree of angles, and the light inlet of the camera and the light-emitting window of projector are about institute
Optical filter is stated to be symmetrical arranged；The field angle of the camera is equal with the field angle of the projector；Projector deflection the
The setting of one angle, θ, the first angle θ are determined according to the field angle and projector off-axis of projector.
The beneficial effects of the present invention are: camera and projector are connected by processor, camera is shot into imaging object
The image information in body surface face is sent to projector after processor is handled, by projector projects to imaging object surface；Pass through
Optical filter and imaging object surface are arranged in 45 degree of angles, by the light-emitting window of the light inlet of camera and projector about optical filter
It is symmetrical arranged, and the field angle of the field angle of camera and projector is arranged to unanimously, camera to be made to project optical filter
The optical path of optical path and projector projects to optical filter is symmetrical about optical filter, and by being arrived between imaging object surface after optical filter
Optical path be overlapped, guarantee projected image and real image registration, be completely coincident projected image with real image；It will projection
Instrument deflects first angle setting, eliminates projector off-axis, improves projection accuracy；By the way that blood-vessels is projected point-to-pointly
On body surface, so that medical staff is can easily acknowledge that the position of blood vessel, facilitate successive treatment.
Detailed description of the invention
Fig. 1 (a) is the schematic diagram that projector off-axis is 0%；
Fig. 1 (b) is the schematic diagram that projector off-axis is 80%；
Fig. 1 (c) is the schematic diagram that projector off-axis is 100%；
Fig. 1 (d) is the schematic diagram that projector off-axis is 120%；
Fig. 2 is a kind of structural schematic diagram of the point-to-point imaging system of near-infrared peripheral vascular of the present invention；
Fig. 3 is the light path schematic diagram that one projector off-axis of the embodiment of the present invention eliminates front and back；
Fig. 4 is the structural schematic diagram of the embodiment of the present invention two.
Label declaration:
1, processor；2, camera；3, projector；4, optical filter；5, imaging object surface.
Specific embodiment
To explain the technical content, the achieved purpose and the effect of the present invention in detail, below in conjunction with embodiment and cooperate attached
Figure is explained in detail.
The most critical design of the present invention is: position and the field angle of adjustment camera and projector, make projector projects
The picture registration of image and camera shooting out, and off-axis is eliminated by the way that projector is deflected first angle.
Referring to Fig. 2, a kind of point-to-point imaging system of near-infrared peripheral vascular, including processor, camera, projector and
Optical filter；The processor is connect with camera and projector respectively；The optical filter is set with imaging object surface in 45 degree of angles
It sets, the light inlet of the camera and the light-emitting window of projector are symmetrical arranged about the optical filter；The visual field of the camera
Angle is equal with the field angle of the projector；The projector deflection first angle θ setting, the first angle θ is according to projection
The field angle and projector off-axis of instrument determine.
As can be seen from the above description, the beneficial effects of the present invention are: blood-vessels is projected on body surface point-to-pointly, is made
Projected image can be completely coincident with real image, improve projection accuracy, medical staff is made to can easily acknowledge that blood vessel
Position, facilitate successive treatment.
It further, further include near-infrared light source, the near-infrared light source is to imaging object surface throw light.
Seen from the above description, it can produce notable difference to imaging object surface throw light with near-infrared light source
Reflectivity improves image definition.
Further, the first angle θ is calculated according to formula θ=β * offset/2, and wherein β is the view of projector
Rink corner, offset are projector off-axis.
Seen from the above description, projector angles are adjusted according to the formula, off-axis can be eliminated.
Further, when the camera is arranged towards imaging object surface, the optical filter is long wave pass filter.
Seen from the above description, the light that projector is launched is visible light, and the wavelength of near-infrared light source is greater than the wave of visible light
Long, for long wave pass filter, the light for being longer than selected wavelength passes through, shorter than the light cut-off of the wavelength, therefore projector is launched
Light can be reflected into imaging object surface by long wave pass filter.
Further, when the projector is arranged towards imaging object surface, the optical filter is short wave pass filter.
Seen from the above description, the light that projector is launched is visible light, and the wavelength of near-infrared light source is greater than the wave of visible light
Long, for short wave pass filter, the light of shorter than selected wavelength passes through, and is longer than the light cut-off of the wavelength, therefore, near-infrared light source exists
The light of imaging object surface reflection can be reflected into camera by short wave pass filter.
Further, the processor includes image enhancement module, described image enhance module respectively with the camera
It is connected with projector.
Seen from the above description, by the way that image enhancement module is arranged, the image that camera is taken carries out image enhancement
Processing, improves the clarity of image.
Further, the camera lens of the camera is zoom lens.
Further, the camera lens of the projector is zoom lens.
Seen from the above description, camera lens uses zoom lens, and the field angle of camera lens is adjusted by optical zoom structure, makes to take the photograph
As head is consistent with the field angle of projector.
Further, the camera lens of the camera is tight shot, and the camera includes that resolution ratio of camera head adjusts mould
Block, the resolution ratio of camera head adjustment module are connected with the processor.
Further, the camera lens of the projector is tight shot, and the projector includes projector resolution adjustment mould
Block, the projector resolution adjustment module are connected with the processor.
Seen from the above description, camera lens uses tight shot, by adjusting the resolution of effective physics of camera or projector
Rate adjusts field angle, keeps the camera consistent with the field angle of projector.
Embodiment one
Referring to figure 2., the embodiment of the present invention one are as follows: a kind of point-to-point imaging system of near-infrared peripheral vascular, including place
Manage device 1, camera 2, projector 3 and optical filter 4；The processor 1 is connect with camera 2 and projector 3 respectively；The optical filtering
Piece 4 and imaging object surface 5 are arranged in 45 degree of angles, and the light inlet of the camera 2 and the light-emitting window of projector 3 are about the filter
Mating plate 4 is symmetrical arranged；The field angle of the camera 2 is equal with the field angle of the projector 3, i.e. α=β；The projector 3
First angle θ setting is deflected, first angle θ is determined according to the field angle and 3 off-axis of projector of projector 3, it is preferred that Ke Yiyi
It is calculated according to formula θ=β * offset/2, wherein β is the field angle of projector 3, and offset is 3 off-axis of projector, and α is to take the photograph
As first 2 field angle.Field angle β, the off-axis offset of projector 3 and the field angle α of camera 2 can be obtained by measurement,
It can also directly be obtained according to factory parameter.Region in figure between the AB on imaging object surface 5 is point-to-point imaging region.It throws
Shadow instrument off-axis eliminate front and back light path schematic diagram as shown in figure 3, projector deflection first angle θ after, the center of projector optical path
Line is vertical with perspective plane.
The system further includes near-infrared light source, and the near-infrared light source can produce bright to 5 throw light of imaging object surface
The reflectivity of significant difference alienation improves image definition.
Preferably, the front end of the camera 2 is arranged in the near-infrared light source.
When the camera 2 is arranged towards imaging object surface 5, the optical filter 4 is long wave pass filter.Because throwing
The light that shadow instrument 3 is launched is visible light, and the wavelength that the wavelength of near-infrared light source is greater than visible light is longer than long wave pass filter
The light of selected wavelength passes through, shorter than the light cut-off of the wavelength, therefore near-infrared light source can be projected by long wave pass filter
The light that instrument 3 is launched can be reflected into imaging object surface 5 by long wave pass filter.
Preferably, the processor 1 include image enhancement module, described image enhance module respectively with the camera 2
It is connected with projector 3.The image that camera 2 takes can be carried out image enhancement processing by image enhancement module, to improve image
Clarity, the image for launching projector 3 becomes apparent from.
Optionally, in order to keep the field angle of camera 2 equal with the field angle of the projector 3, i.e. α=β, camera 2
Or the camera lens of projector 3 can use zoom lens, adjust field angle by optical zoom structure, to ensure the two field angle one
It causes；It both can also ensure that field angle is consistent by adjusting effective physical resolution, specifically, projector 3 can be kept
Field angle is constant, and camera 2 uses tight shot, and the camera 2 includes resolution ratio of camera head adjustment module, the camera
Resolution adjustment module and the processor 1 connect, aobvious by computer installation image by the way that processor 1 is connected computer
Show the starting ranks parameter of resolution ratio and terminate ranks parameter, the view of camera 2 is adjusted by adjusting effective physical resolution
Rink corner；Or keeping the field angle of camera 2 constant, the camera lens of projector 3 uses tight shot, and the projector 3 includes throwing
Shadow instrument resolution adjustment module, the projector resolution adjustment module and the processor 1 connect, equally by adjusting effective
Physical resolution adjusts the field angle of projector 3.
The present embodiment by make camera project optical filter optical path and projector projects to optical filter optical path about
Optical filter is symmetrical, and by being overlapped after optical filter to the optical path between imaging object surface, guarantee projected image and real image
Registration, be completely coincident projected image with real image；By projector deflection first angle setting, it is inclined to eliminate projector
Axis improves projection accuracy.
Embodiment two
Referring to figure 4., the present embodiment is another implementation of embodiment one, and something in common is not repeated, and difference exists
In: when the projector 3 is arranged towards imaging object surface 5, the optical filter 4 is short wave pass filter.
Because the light of shorter than selected wavelength passes through for short wave pass filter, it is longer than the light cut-off of the wavelength, therefore, closely
Infrared light supply can be reflected into camera 2 in the light that imaging object surface 5 is reflected by short wave pass filter, and projector 3 is launched
Light imaging object surface 5 can be projected by short wave pass filter.
In conclusion a kind of point-to-point imaging system of near-infrared peripheral vascular provided by the invention, is connected by processor
The image information on camera shooting imaging object surface is sent to projection by camera and projector after processor is handled
Instrument, by projector projects to imaging object surface；By the way that optical filter and imaging object surface to be arranged in 45 degree of angles, by camera
Light inlet and the light-emitting window of projector be symmetrical arranged about optical filter, and by the field angle of the field angle of camera and projector
It is arranged to the optical path for unanimously making camera project optical filter and projector projects to the optical path of optical filter about optical filter pair
Claim, and by being overlapped after optical filter to the optical path between imaging object surface, the registration of guarantee projected image and real image,
It is completely coincident projected image with real image；By projector deflection first angle setting, projector off-axis is eliminated, projection is improved
Accuracy；With near-infrared light source to imaging object surface throw light, it can produce the reflectivity of notable difference, it is clear to improve image
Clear degree；By the way that image enhancement module is arranged, the image that camera is taken carries out image enhancement processing, improves the clear of image
Degree；By adjusting the field angle of camera or projector, it is consistent field angle；By the way that blood-vessels is projected point-to-pointly
Onto body surface, so that medical staff is can easily acknowledge that the position of blood vessel, facilitate successive treatment.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalents made by bright specification and accompanying drawing content are applied directly or indirectly in relevant technical field, similarly include
In scope of patent protection of the invention.
Claims (9)
1. a kind of point-to-point imaging system of near-infrared peripheral vascular, which is characterized in that including processor, camera, projector and
Optical filter；The processor is connect with camera and projector respectively；The optical filter is set with imaging object surface in 45 degree of angles
It sets, the light inlet of the camera and the light-emitting window of projector are symmetrical arranged about the optical filter；The visual field of the camera
Angle is equal with the field angle of the projector；The projector deflection first angle θ setting, the first angle θ is according to projection
The field angle and projector off-axis of instrument determine；
The first angle θ is calculated according to formula θ=β * offset/2, and wherein β is the field angle of projector, and offset is
Projector off-axis.
2. the point-to-point imaging system of near-infrared peripheral vascular according to claim 1, which is characterized in that further include near-infrared
Light source, the near-infrared light source is to imaging object surface throw light.
3. the point-to-point imaging system of near-infrared peripheral vascular according to claim 1, which is characterized in that when the camera
When being arranged towards imaging object surface, the optical filter is long wave pass filter.
4. the point-to-point imaging system of near-infrared peripheral vascular according to claim 1, which is characterized in that when the projector
When being arranged towards imaging object surface, the optical filter is short wave pass filter.
5. the point-to-point imaging system of near-infrared peripheral vascular according to claim 1, which is characterized in that the processor packet
Image enhancement module is included, described image enhancing module is connect with the camera and projector respectively.
6. the point-to-point imaging system of near-infrared peripheral vascular according to claim 1, which is characterized in that the camera
Camera lens is zoom lens.
7. the point-to-point imaging system of near-infrared peripheral vascular according to claim 1, which is characterized in that the projector
Camera lens is zoom lens.
8. the point-to-point imaging system of near-infrared peripheral vascular according to claim 1, which is characterized in that the camera
Camera lens is tight shot, and the camera includes resolution ratio of camera head adjustment module, the resolution ratio of camera head adjustment module and
The processor connection.
9. the point-to-point imaging system of near-infrared peripheral vascular according to claim 1, which is characterized in that the projector
Camera lens is tight shot, and the projector includes projector resolution adjustment module, the projector resolution adjustment module and
The processor connection.
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| CN201610243381.5A CN105725978B (en) | 2016-04-18 | 2016-04-18 | The point-to-point imaging system of near-infrared peripheral vascular |
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| CN201610243381.5A CN105725978B (en) | 2016-04-18 | 2016-04-18 | The point-to-point imaging system of near-infrared peripheral vascular |
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| CN105725978B true CN105725978B (en) | 2019-02-12 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN205649489U (en) * | 2016-04-18 | 2016-10-19 | 深圳元华医疗设备技术有限公司 | Point -to -point imaging system of near -infrared body surface blood vessel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2552037Y (en) * | 2002-07-17 | 2003-05-21 | 宋永刚 | Off-axis short focus rear-projection display device |
| CN2611944Y (en) * | 2003-03-24 | 2004-04-14 | 数源科技股份有限公司 | Optical regulation mechanism of back reflection projector |
| KR101348063B1 (en) * | 2012-03-07 | 2014-01-03 | 진우현 | Vein-viewer System using the Difference of Infrared Ray Absorption Rate Based on Oxygen Saturation |
| CN202821303U (en) * | 2012-08-15 | 2013-03-27 | 王庆源 | Infrared vein display device |
| US20140100524A1 (en) * | 2012-10-10 | 2014-04-10 | Christie Digital Systems Usa, Inc. | Catheter discrimination and guidance system |
| CN103491328A (en) * | 2013-06-26 | 2014-01-01 | 苏州联科盛世科技有限公司 | Vein projector with image correction function and image correction method |
| CN104605819A (en) * | 2015-01-09 | 2015-05-13 | 深圳元华医疗设备技术有限公司 | Device and method for near-infrared vein angiography point-to-point projection |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN205649489U (en) * | 2016-04-18 | 2016-10-19 | 深圳元华医疗设备技术有限公司 | Point -to -point imaging system of near -infrared body surface blood vessel |
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