CN207286036U - A kind of angiocarpy three-dimensional optical coherent video system - Google Patents

A kind of angiocarpy three-dimensional optical coherent video system Download PDF

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CN207286036U
CN207286036U CN201720058984.8U CN201720058984U CN207286036U CN 207286036 U CN207286036 U CN 207286036U CN 201720058984 U CN201720058984 U CN 201720058984U CN 207286036 U CN207286036 U CN 207286036U
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optical
probe
video system
picture frame
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朱锐
曹挥
曹一挥
沈诚亮
刘海平
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Shenzhen Vivolight Medical Device Technology Co Ltd
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    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
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Abstract

The utility model provides a kind of cardiovascular three-dimensional optical coherent video system, and the angiocarpy three-dimensional optical coherent video system includes sequentially connected probe unit, probe interface unit, optical signal processing unit, digital signal processing unit and display；The probe unit includes fibre-optical probe, and the fibre-optical probe is used for the sample signal of the action collection blood vessel according to the probe interface unit, and the sample signal is sent to the optical signal processing unit by the probe interface unit；The optical signal processing unit is used to the sample signal is handled to obtain picture frame；The digital signal processing unit includes data converter and data corrector；The data corrector is used to carry out the data converter transformed picture frame Data correction respectively and three-dimensionalreconstruction obtains 3-D view, and exports to the display and shown.The angiocarpy three-dimensional optical coherent video system can improve the accuracy of the optical coherence imaged image of three-dimensional.

Description

A kind of angiocarpy three-dimensional optical coherent video system
Technical field
It the utility model is related to cardiovascular based endoscopic imaging technical field, more particularly to a kind of cardiovascular three-dimensional optical is concerned with shadow As system.
Background technology
Optical coherence image technology, is a kind of imaging technique that last decade develops rapidly, it is done using weak coherent light The basic principle of interferometer, the light that light source is sent is divided into two beams, a branch of to be transmitted to tested tissue, is also sample arm, another beam It is transmitted to reference to reflective mirror, is also reference arm, then from tested tissue and from the two-beam letter returned with reference to mirror reflection Number superposition, interference, different strong and weak gradation of images are finally shown with the difference of tested tissue according to optical signal, so as to group Knit interior be imaged.
Optical coherence image can be divided into Time Domain Optical coherent video according to technical principle and domain optical coherence image two is big Class.Domain optical coherence image due to it with high-resolution, image taking speed is fast, the non-invasively advantage such as imaging in tissue, by It is widely used in the imaging of the organs such as ophthalmology, alimentary canal, angiocarpy.Comparatively speaking, cardiovascular optical coherence image system is the most Complexity, the cardiovascular optical coherence image documentation equipment of complete set need to integrate：Light source, optical splitter, optical interdferometer, reference arm, Probe interface unit (probe interface unit, PIU), conduit, blood flushing liquor injection device, fibre-optical probe, high speed The resources such as data collector, signal processor, image processing software.The basic principle of cardiovascular optical coherence image scan imaging It is：Pass through PIU rotation and pullback motion, and drive the fibre-optical probe of front end to do tomography in the blood vessels by bourdon tube and sweep at a high speed Retouch imaging.3D angiocarpy optical coherence images have huge potential advantages, 3D painstaking effort lightpipe optics compared with 2D optical coherence images Coherent video can intuitively provide the space three-dimensional structure information of blood vessel for doctor, doctor can be helped to be better understood from thrombus Spatial shape, the adherent situation of stent, assess bifurcated lesions, instruct to expand after stent, instruct thrombectomby etc..
But 3D angiocarpy optical coherence images are absolutely not simply to arrive 2D optical coherence image sequence image stacks 3D pictures are rendered to together, because so reconstruct can there are error, the serious understanding that can also mislead doctor.In real work In, since the frictional force between bourdon tube and conduit can shake when high speed rotates, the three-dimensional optical for causing actual acquisition to arrive Coherent video image can be axially formed it is rotary shifted, so if directly to sequence image carry out three-dimensionalreconstruction, in three-dimensional space Between in be exist dislocation, therefore, such result be for clinical analysis it is inaccurate, it is serious to cause examining for mistake Disconnected result.
Utility model content
To solve the above-mentioned problems, can the utility model proposes a kind of cardiovascular three-dimensional optical coherent video system Improve the accuracy of three-dimensional optical coherence imaged image.
The utility model proposes concrete technical scheme be：A kind of cardiovascular three-dimensional optical coherent video system, institute are provided Stating cardiovascular three-dimensional optical coherent video system includes sequentially connected probe unit, probe interface unit, optical signal prosessing list Member, digital signal processing unit and display；The probe unit includes fibre-optical probe, and the fibre-optical probe is used for according to The sample signal of the action collection blood vessel of probe interface unit, and the sample signal is sent by the probe interface unit To the optical signal processing unit；The optical signal processing unit is used to the sample signal is handled to obtain picture frame； The digital signal processing unit includes data converter and data corrector；The data corrector is used for respectively to the number Carry out Data correction according to the transformed picture frame of converter and three-dimensionalreconstruction obtain 3-D view, and export to the display into Row display.
Further, the data corrector includes reference points detection unit, image correction unit and three-dimensionalreconstruction unit； The reference points detection unit is used for the position mark point for obtaining the transformed picture frame of the data converter, described image school Positive unit is used to obtain school to the progress rotation transformation of the data converter transformed picture frame according to the position mark point Picture frame after standard, the three-dimensionalreconstruction unit are used to obtain graphics to the picture frame progress three-dimensionalreconstruction after the calibration Picture.
Further, the digital signal processing unit further includes feedback controller, and the feedback controller is used for basis The monochrome information and gradient information of the transformed picture frame of data converter control the movement shape of the probe interface unit State；The feedback controller includes starting module of pulling back；It is described pull back starting module be used for detect vessel lumen whether rinse it is dry Only the probe interface unit starting pullback motion is controlled and when the vessel lumen is rinsed well.
Further, the starting module of pulling back includes computing unit, judging unit and pulls back to begin to respond to unit, described Computing unit is used to calculate the equal of brightness of the transformed picture frame of the data converter in predetermined flushing detection zone Value and variance；The judging unit is used to judge whether the average meets trigger condition with the variance, and is meeting to trigger Sent back during condition and pull open beginning trigger signal；It is described pull back begin to respond to unit be used for according to described in pull back beginning trigger signal control Make the probe interface unit starting pullback motion.
Further, the feedback controller includes stopping modular of pulling back, and the stopping modular of pulling back is used to detect described Whether fibre-optical probe moves to precalculated position and controls the probe to connect when the fibre-optical probe moves to the precalculated position Mouth unit stops pullback motion.
Further, the stopping modular of pulling back includes the second computing unit, the second judging unit and stopping of pulling back responds Unit, second computing unit are used for the average and most for calculating the transformed picture frame maximum brightness value of the data converter The mean and variance of big Grad；Second judging unit is used for the average for judging the maximum brightness value and the maximum ladder Whether the mean and variance of angle value meets the second trigger condition, and stopping triggering letter of pulling back is sent when meeting the second trigger condition Number；The stopping response unit of pulling back controls the probe interface unit to stop back for stopping trigger signal of pulling back according to Roping is moved.
Further, the probe unit further includes conduit, optical fiber, transparent outer sleeve and bourdon tube, the optical fiber, spring Pipe and fibre-optical probe are located in the conduit, and the conduit is included outside internal portion and body, and flushing is provided with the body outside Liquid inlet, the portion in vivo are additionally provided with flushing liquor outlet away from one end outside the body；The fibre-optical probe passes through institute State optical fiber to be connected with the probe interface unit, the bourdon tube is sheathed on the optical fiber, and the transparent outer sleeve is coated at In the internal portion and between the fibre-optical probe and the body outside.
Further, the probe interface unit includes motor, and the motor is connected with the bourdon tube.
Further, the optical signal processing unit includes light source, interferometer and point being connected respectively with the interferometer Light device, detector and reflective mirror, the light source are connected with the optical splitter, and the interferometer is connected with the probe interface unit The detector is connected with the data signal processing unit.
The utility model proposes cardiovascular three-dimensional optical coherent video system has the following advantages：
(1) the cardiovascular three-dimensional optical coherent video system includes data corrector, and data corrector can be right respectively The transformed picture frame of data converter carries out Data correction and three-dimensionalreconstruction obtains 3-D view；
(2) the cardiovascular three-dimensional optical coherent video system includes feedback controller, it can control the probe to connect The motion state of mouth unit；The feedback controller includes starting module of pulling back, and starting module of pulling back can detect vessel lumen Whether rinse well and the probe interface unit starting pullback motion is controlled in the case where vessel lumen is rinsed well；
(3) feedback controller further includes stopping modular of pulling back, and the stopping modular of pulling back can detect the optical fiber Whether probe moves to the position of the transparent outer sleeve and moves to the position of the transparent outer sleeve in the fibre-optical probe When control the probe interface unit to stop pullback motion.
Brief description of the drawings
What is carried out in conjunction with the accompanying drawings is described below, above and other aspect of the embodiment of the utility model, feature and Advantage will become clearer, in attached drawing：
Fig. 1 is the structure diagram of cardiovascular three-dimensional optical coherent video system；
Fig. 2 is the structure diagram of feedback controller in Fig. 1；
Fig. 3 is the structure diagram of starting module of pulling back in Fig. 2；
Fig. 4 is the schematic diagram for rinsing detection zone；
Fig. 5 is the structure diagram of stopping modular of pulling back in Fig. 2；
Fig. 6 is coordinate transform schematic diagram；
Fig. 7 is the structure diagram of data corrector in Fig. 1；
Fig. 8 is the process schematic being corrected according to position mark point；
Fig. 9 is the flow diagram of the imaging method of cardiovascular three-dimensional optical coherent video system.
Embodiment
Hereinafter, with reference to the accompanying drawings to the embodiment of the utility model is described in detail.However, it is possible in many different forms To implement the utility model, and the utility model should not be construed as limited to the specific embodiment that illustrates here.On the contrary, It is in order to explain the principle of the utility model and its practical application, so that the other technologies people of this area to provide these embodiments Member is it will be appreciated that the various embodiments of the utility model and the various modifications for being suitable for specific intended application.
With reference to Fig. 1, angiocarpy three-dimensional optical coherent video system provided in this embodiment, for obtaining the optics phase of three-dimensional Dry imaged image, wherein, three-dimensional optical coherence imaged image is made of multiple images frame.Cardiovascular three-dimensional optical coherent video System include sequentially connected probe unit 1, probe interface unit 2, optical signal processing unit 3, digital signal processing unit 4 and Display 5.Probe unit 1 includes fibre-optical probe 11, and fibre-optical probe 11 is used to gather blood vessel according to the action of probe interface unit 2 Sample signal and sample signal is sent to optical signal processing unit 3 by probe interface unit 2, probe interface unit here 2 action includes rotation and pulls back, and the sample signal of blood vessel includes vascular wall and endovascular signal.Optical signal processing unit 3 For being handled sample signal to obtain picture frame.Specifically, digital signal processing unit 4 includes feedback controller 41, number According to adjuster 42 and data converter 44, feedback controller 41 is used for according to the bright of 44 transformed picture frame of data converter The motion state of angle value and Grad control probe interface unit 2, the motion state of probe interface unit 2 is including starting back here Two states of pullback motion are moved and stopped in roping, and data corrector 42 is used for respectively to 44 transformed picture frame of data converter Carry out Data correction and three-dimensionalreconstruction obtains 3-D view, display 5 is used to show 3-D view.Three-dimensional optics phase Dry imaged image is made of the mapping of multiple images frame interpolation, the three-dimensional optical coherence imaged image after display display mapping.
Probe unit 1 further includes conduit 12, optical fiber 13, transparent outer sleeve 14 and bourdon tube 15, optical fiber 13, bourdon tube 15 and Fibre-optical probe 11 is located in conduit 12.Conduit 12 is connected with probe interface unit 2, and conduit 12 is included outside internal portion and body, body Inside is used in the blood vessel in insertion body.Flushing liquor inlet 12a is provided with body outside, internal portion is away from one end outside body Flushing liquor outlet 12b is additionally provided with, flushing liquor is injected into conduit 12 simultaneously by flushing liquor injection device from flushing liquor inlet 12a Export in 12b and discharge from flushing liquor.Fibre-optical probe 11 is located at internal portion away from one end outside body, it passes through optical fiber 13 and probe Interface unit 2 connects, and bourdon tube 15 is sheathed on optical fiber 13, and transparent outer sleeve 14 is coated in internal portion and is located at fibre-optical probe Between 11 and body outside.
Probe interface unit 2 includes motor (not shown), and motor is connected with bourdon tube 15, and motor is used for driving spring pipe 15 Rotate and Return spring pipe 15, bourdon tube 15 occur elastic deformation and be tightly sheathed on optical fiber 13 and by between optical fiber 13 Frictional force drive optical fiber 13 and fibre-optical probe 11 rotates together and pull back optical fiber 13 and fibre-optical probe 11 so that fibre-optical probe 11 move in 12 inside spin of conduit, form spiral three-dimensional scanning.
Optical signal processing unit 3 includes light source 31, optical splitter 32, detector 33, interferometer 34 and reflective mirror 35.Light source 31 The light beam sent is divided into the duplicate light of two beams after the effect of optical splitter 32, and light beam is transmitted to reflective mirror by interferometer 34 35, it is known as reference arm, a branch of to be sent to probe interface unit 2 by interferometer 34, probe interface unit 2 again passes through the light beam Optical fiber 13, which is transmitted to fibre-optical probe 11 and is concurrently incident upon internal blood vessel, to be detected, and is known as sample arm.Light in reference arm is through reflective The reference light that is formed incides interferometer 34 after mirror 35 reflects, and is formed after the reflection of light menses inside pipe wall and scattering in sample arm Sample signal is received by fibre-optical probe 11 and is back to interferometer 34.Interferometer 34 is overlapped reference signal and sample signal The optical signal after optical interference is interfered is produced, wherein, different tissue profiles forms the letter of the light after different strong and weak interference Number, the power of optical signal can reflect endovascular design feature.Detector 33 is used to detecting the optical signal after interference and by its turn It is changed to corresponding electric signal.
Digital signal processing unit 4 further includes data collector 43.Data collector 43 is connected with detector 33, it is used for Receive the electric signal and the electric signal is converted into the corresponding digital signal of picture frame, data converter 44 is used to receive institute State digital signal and the digital signal is converted into cartesian coordinate space from polar coordinate space.Wherein, in the present embodiment Data converter 44 can be in many different forms realization, include but not limited to processor (CPU), graphics processor (GPU), Programmable gate array (FPGA), microprocessor (such as ARM), digital signal processor (DSP) device or their any combination.
In optical coherence video imaging, generally require and vessel inner blood is rinsed, otherwise blood has light stronger Absorption and scattering process, influence image quality.Before the cardiovascular optical coherence image scan of triggering, clinician's injecting blood Flushing liquor, and observe optical coherence video imaging preview screen, when confirming that blood is rinsed well, triggers PIU and pulls back instruction manually Carry out three-dimensional imaging.Very big inconvenience is brought to clinical practice operation however, manually triggering PIU and pulling back, triggering of pulling back is too early often Vessel inner blood is not rinsed well, causes image quality to be deteriorated, and can not meet clinical diagnosis demand；Triggered on the contrary, pulling back In evening, will give patient injection excessive blood flushing liquor, unnecessary side effect is brought to patient.
In addition, existing angiocarpy optical coherence image is often by a fixed distance of pulling back is set at present, i.e., PIU triggerings stopping after certain distance of pulling back is pulled back.However, when fibre-optical probe is withdrawn into transparent outer sleeve, it is collected Data be invalid, the data in transparent outer sleeve, have not only carried out unnecessary money to Data Post, data tape Source wastes, and after three-dimensional rendering, can also cause to judge by accident to diagnosis.
With reference to Fig. 2, the feedback controller 41 in the present embodiment includes pull back starting module 410 and stopping modular 411 of pulling back. Starting module of pulling back 410 is used to detect whether vessel lumen is rinsed well and control probe to connect when vessel lumen is rinsed well Mouth unit 2 starts pullback motion, and after probe interface unit 2 starts pullback motion, motor starts to pull back and driving spring pipe is pulled back Optical fiber 13 and fibre-optical probe 11, fibre-optical probe 11 start screw in conduit 12 and start three-dimensional spiral scanning.Pull back and stop Only module 411 is used for whether detection fiber probe 11 to move to the position of transparent outer sleeve 14 and moved in fibre-optical probe 11 Probe interface unit 2 is controlled to stop pullback motion during the position of transparent outer sleeve 14, probe interface unit 2 stops pullback motion Afterwards, motor stops rotating and stops driving spring pipe 15, and at this time, fibre-optical probe 11 stops scanning.
Specifically, with reference to Fig. 3, Fig. 4, starting module of pulling back 410 includes the first computing unit 100, the first judging unit 101 And pull back and begin to respond to unit 102, for the ease of distinguishing, the computing unit in starting module of pulling back is named as the first meter here Unit 100 is calculated, the judging unit in starting module of pulling back is named as the first judging unit 101.First computing unit 100 is used for Calculate the brightness I of the digital signal in the cartesian coordinate space in predetermined flushing detection zone1Mean and variance, First threshold th is preset with one judging unit 1011And second threshold th2, the first judging unit 101 is for judging the average Whether first threshold th is less than1And whether the variance is less than second threshold th2And it is less than first threshold th in the average1And The variance is less than second threshold th2When send back to pull open beginning trigger signal and give back to and pull open beginning response unit 102, pull back and start to ring Unit 102 is answered to be used for according to pulling back and start 2 startup pullback motion of trigger signal control probe interface unit, i.e., described average and institute State variance and meet following trigger condition：
mean(I1) ＜ th1
std(I1) ＜ th2。
The width of predetermined flushing detection zone is set as to 2 times (as shown in the Fig. 4) of conduit diameter in the present embodiment, Certainly, predetermined flushing detection zone can be determined according to actual conditions, not limited here.If vessel lumen is rinsed dry Only, then the average of the brightness of the detection zone of annular and variance should be smaller, therefore, when the average and the variance meet above During two conditions, the first judging unit 101, which produces one and pulls back, to be started trigger signal and described pull back is started trigger signal hair Give to pull back and begin to respond to unit 102, the motor begun to respond in the control probe interface of unit 102 unit 2 of pulling back starts at a high speed Rotate and drive bourdon tube 15 to rotate, bourdon tube 15 occurs elastic deformation and drives optical fiber by the frictional force between optical fiber 13 13 and fibre-optical probe 11 rotates and pull back optical fiber 13 and fibre-optical probe 11, so that fibre-optical probe 11 is transported in 12 inside spin of conduit It is dynamic, spiral three-dimensional scanning is formed, finally obtains endovascular three-dimensional spiral scan image.
With reference to Fig. 5, Fig. 6, stopping modular 411 of pulling back includes the second computing unit 103, the second judging unit 104 and pulls back Stop response unit 105.Second computing unit 103 is used to be converted to the digital signal in the cartesian coordinate space in Fig. 6 Digital signal in polar coordinate space (ρ, θ), wherein, ρ is polar diameter, and θ is polar angle.Second computing unit 103 is additionally operable to calculate pole The maximum brightness value I on each row of digital signal radially in coordinate spacedAnd greatest gradient value G and calculate it is all most Big brightness value IdAverage and all greatest gradient value G mean and variance.
The 3rd threshold value th is preset with second judging unit 1043, the 4th threshold value th4And the 5th threshold value th5, second judges list Member 104 is used to judge maximum brightness value IdAverage whether be more than the 3rd threshold value th3, greatest gradient value G average whether be more than the Four threshold value th4And whether the variance of greatest gradient value is less than the 5th threshold value th5And in maximum brightness value IdAverage be more than the 3rd threshold Value th3, greatest gradient value G average be more than the 4th threshold value th4And the variance of greatest gradient value G is less than the 5th threshold value th5When send Pull back and stop trigger signal to stopping response unit 105 of pulling back, pull back and stop in the control probe interface of response unit 105 unit 2 Motor stop pulling back fibre-optical probe 11, i.e. maximum brightness value IdAverage, the average of greatest gradient value G and greatest gradient value G Variance meet following three conditions：
Wherein, the numeral in polar coordinate space is believed by using the Prewitt boundary filters to vertical edge sensitivity Number handled, obtain gradient image, then detect the greatest gradient value G on each row radially, then calculate it is all most The gradient mean value and variance of big Grad G.As maximum brightness value IdAverage, the average of greatest gradient value G and greatest gradient value G Variance at the same time meet above three formulas when, then illustrate to include transparent outer sleeve 14 in the picture frame, i.e. fibre-optical probe 11 Predetermined position is moved to.
With reference to Fig. 7, Fig. 8, in order to improve the accuracy of the optical coherence imaged image of three-dimensional, the data in the present embodiment Adjuster 42 includes reference points detection unit 420, image correction unit 421 and three-dimensionalreconstruction unit 422.Reference points detection unit The 420 position mark point for obtaining the digital signal in cartesian coordinate space, it is especially by detection in pre-set radius area The gray value of the digital signal in cartesian coordinate space in domain, if multiple points meet gray threshold, then takes maximum ash Mark point of the location point as the digital signal in cartesian coordinate space corresponding to angle value.
Image correction unit 421 is used to carry out school to the digital signal in cartesian coordinate space according to position mark point The picture frame after calibration will definitely be arrived, it carries out school especially by rotational transformation matrix to the digital signal in cartesian coordinate space Standard, rotation transformation is to be carried out based on picture centre rotating used by the present embodiment, and the matrix of rotation transformation is：
Rotation transformation formula is as follows：
In formula, (x0, y0) be original coordinate system coordinate, (x, y) be postrotational picture frame in pixel coordinate, θ tables Show rotation angle, clockwise turn to just, rotate to be counterclockwise negative.As shown in figure 8, after by calibration, all images in sequence The mark point of frame is in longitudinal direction based on identical direction.
Three-dimensionalreconstruction unit 422 is used to obtain 3-D view to the picture frame progress three-dimensionalreconstruction after calibration, it specifically will Picture frame after calibration is by three-dimensionalreconstruction algorithm, i.e., according to color mapping and opacity mapping function, by the figure after calibration As frame by object plotting method is mapped to projected image plane.
With reference to Fig. 9, the present embodiment additionally provides the imaging method of above-mentioned cardiovascular three-dimensional optical coherent video system, is used for Three-dimensional optical coherence imaged image is obtained, three-dimensional optical coherence imaged image is made of multiple images frame, the method bag Include following steps：
Step S1, fibre-optical probe 11 gathers the sample signal of blood vessel according to the action of probe interface unit 2 and believes sample Number optical signal processing unit 3 is sent to by probe interface unit 2.
Wherein, step S1 is specifically included first under the guiding of seal wire and X-ray radiography, passes through percutaneous coronary intervention Fibre-optical probe 11 is inserted into position to be scanned, then injects flushing in flushing liquor inlet 12a by flushing liquor injection device Liquid is rinsed the blood in vessel lumen, meanwhile, fibre-optical probe 11 gathers sample signal and will by probe interface unit 2 Sample signal is sent to optical signal processing unit 3.
Step S2, optical signal processing unit 3 is handled to obtain picture frame and picture frame is sent to number to sample signal Word signal processing unit 4.
Step S3, digital signal processing unit 4 carries out Data correction respectively to picture frame and three-dimensionalreconstruction obtains graphics Picture.
Step S4, display 5 receives and shows 3-D view.
Specifically, digital signal processing unit 4 carries out Data correction respectively to picture frame in step S3 and three-dimensionalreconstruction obtains Comprise the following steps to 3-D view：
Gray value of the described image frame in pre-set radius region is calculated, will meet the point of gray threshold and gray value maximum Position mark point as described image frame；
Picture frame after rotation transformation is corrected carries out described image frame according to the position mark point；
Three-dimensionalreconstruction is carried out to the picture frame after the correction and obtains 3-D view.
Specifically, step S3 further includes monochrome information and gradient information control of the digital signal processing unit 4 according to picture frame The motion state of probe interface unit 2 processed；Wherein, first threshold and second threshold are preset with digital signal processing unit 4, number Word signal processing unit 4 controls the motion state of probe interface unit 2 to include according to the monochrome information and gradient information of picture frame Following steps：
Calculate brightness I of the described image frame in predetermined flushing detection zone1Mean and variance；
Judge whether the average is less than first threshold th1And whether the variance is less than second threshold th2It is if described equal Value is less than first threshold th1And the variance is less than second threshold th2, then probe interface unit 2 is controlled to start pullback motion.
If the average is not less than first threshold th1Or the variance is not less than second threshold th2, then step S3 also wrap Include：
Described image frame is converted into the picture frame under polar coordinate system；
Calculate the maximum brightness value I of each row image of picture frame radially under the polar coordinate systemdAnd greatest gradient Value G；
Calculate all maximum brightness value IdAverage and all greatest gradient value G mean and variance；
Judge maximum brightness value IdAverage whether be more than the 3rd threshold value th3, greatest gradient value G average whether be more than the Four threshold value th4And whether the variance of greatest gradient value G is less than the 5th threshold value th5If maximum brightness value IdAverage be more than the 3rd Threshold value th3, greatest gradient value G average be more than the 4th threshold value th4And the variance of greatest gradient value G is less than the 5th threshold value th5, then Probe interface unit 2 is controlled to stop pullback motion.
The cardiovascular three-dimensional optical coherent video system and its imaging method that the present embodiment proposes have the following advantages：
(1) cardiovascular three-dimensional optical coherent video system includes data corrector 42, and data corrector 42 can be to data 44 transformed picture frame of converter carries out Data correction respectively and three-dimensionalreconstruction obtains 3-D view, improves the optics of three-dimensional The accuracy of coherent video image；
(2) cardiovascular three-dimensional optical coherent video system includes feedback controller 41, it can control probe interface unit 2 Motion state；Feedback controller 41 includes starting module 410 of pulling back, and starting module of pulling back 410, which can detect vessel lumen, is It is no to rinse well and control probe interface unit 2 to start pullback motion in the case where vessel lumen is rinsed well；
(3) feedback controller 41 further includes stopping modular 411 of pulling back, and stopping modular 411 of pulling back being capable of detection fiber probe Whether 11 move to the position of transparent outer sleeve 14 and spy controlled when fibre-optical probe 11 moves to the position of transparent outer sleeve 14 Head interface unit 2 stops pullback motion.
Although the utility model has shown and described with reference to specific embodiment, those skilled in the art will manage Solution：In the case where not departing from the spirit and scope of the utility model limited by claim and its equivalent, can herein into Various change in row form and details.

Claims (9)

1. a kind of angiocarpy three-dimensional optical coherent video system, it is characterised in that connect including sequentially connected probe unit, probe Mouth unit, optical signal processing unit, digital signal processing unit and display；The probe unit includes fibre-optical probe, described Fibre-optical probe is used for the sample signal of the action collection blood vessel according to the probe interface unit, and the sample signal is passed through The probe interface unit is sent to the optical signal processing unit；The optical signal processing unit is used for the sample signal Handled to obtain picture frame；The digital signal processing unit includes data converter and data corrector；The data school Positive device is used to carry out Data correction to the transformed picture frame of the data converter respectively and three-dimensionalreconstruction obtains 3-D view, And export to the display and shown.
2. angiocarpy three-dimensional optical coherent video system according to claim 1, it is characterised in that the data corrector Including reference points detection unit, image correction unit and three-dimensionalreconstruction unit；The reference points detection unit is used to obtain described The position mark point of the transformed picture frame of data converter, described image correction unit are used for according to the position mark point pair The transformed picture frame of data converter carries out the picture frame after rotation transformation is calibrated, and the three-dimensionalreconstruction unit is used Picture frame after to the calibration carries out three-dimensionalreconstruction and obtains 3-D view.
3. angiocarpy three-dimensional optical coherent video system according to claim 1, it is characterised in that at the digital signal Reason unit further includes feedback controller, and the feedback controller is used for according to the bright of the transformed picture frame of the data converter Spend information and gradient information controls the motion state of the probe interface unit；The feedback controller includes starting mould of pulling back Block；The starting module of pulling back is used to detect whether vessel lumen is rinsed well and rinse time control well in the vessel lumen Make the probe interface unit starting pullback motion.
4. angiocarpy three-dimensional optical coherent video system according to claim 3, it is characterised in that the starting mould of pulling back Block includes computing unit, judging unit and pulls back to begin to respond to unit, and the computing unit is used to calculate the data converter The mean and variance of brightness of the transformed picture frame in predetermined flushing detection zone；The judging unit is used to judge institute State whether average meets trigger condition with the variance, and sent back when meeting trigger condition and pull open beginning trigger signal；It is described Pull back begin to respond to unit be used for according to described in pull back and start the trigger signal control probe interface unit starting pullback motion.
5. angiocarpy three-dimensional optical coherent video system according to claim 3, it is characterised in that the feedback controller Including stopping modular of pulling back, it is described pull back stopping modular be used for detect the fibre-optical probe whether move to precalculated position and The fibre-optical probe controls the probe interface unit to stop pullback motion when moving to the precalculated position.
6. angiocarpy three-dimensional optical coherent video system according to claim 5, it is characterised in that described pull back stops mould Block includes the second computing unit, the second judging unit and pulls back to stop response unit, and second computing unit is used to calculate institute State the average of the transformed picture frame maximum brightness value of data converter and the mean and variance of greatest gradient value；Described second sentences Disconnected unit is used to judge whether the average of the maximum brightness value and the mean and variance of the greatest gradient value meet that second touches Clockwork spring part, and send to pull back when meeting the second trigger condition and stop trigger signal；The stopping response unit of pulling back is used for root Stop the trigger signal control probe interface unit stopping pullback motion according to described pull back.
7. angiocarpy three-dimensional optical coherent video system according to claim 1, it is characterised in that the probe unit is also Including conduit, optical fiber, transparent outer sleeve and bourdon tube, the optical fiber, bourdon tube and fibre-optical probe are located in the conduit, described Conduit is included outside internal portion and body, flushing liquor inlet is provided with the body outside, the portion in vivo is away from described external The one end in portion is additionally provided with flushing liquor outlet；The fibre-optical probe is connected by the optical fiber with the probe interface unit, institute Bourdon tube is stated to be sheathed on the optical fiber, the transparent outer sleeve be coated at it is described in vivo in portion and positioned at the fibre-optical probe with Between the body outside.
8. angiocarpy three-dimensional optical coherent video system according to claim 7, it is characterised in that the probe interface list Member includes motor, and the motor is connected with the bourdon tube.
9. angiocarpy three-dimensional optical coherent video system according to claim 1, it is characterised in that the optical signal prosessing Unit includes light source, interferometer and the optical splitter being connected respectively with the interferometer, detector and reflective mirror, the light source and institute Optical splitter connection is stated, the interferometer is connected the detector and the data signal processing unit with the probe interface unit Connection.
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