CN202776268U - Real-time image displaying system based on swept source and optical coherence tomography (OCT) - Google Patents
Real-time image displaying system based on swept source and optical coherence tomography (OCT) Download PDFInfo
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- CN202776268U CN202776268U CN201220465468.4U CN201220465468U CN202776268U CN 202776268 U CN202776268 U CN 202776268U CN 201220465468 U CN201220465468 U CN 201220465468U CN 202776268 U CN202776268 U CN 202776268U
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Abstract
The utility model discloses a real-time image displaying system based on a swept source and an optical coherence tomography (OCT). The system comprises the swept source, a scanning probe, a control card, a high-speed acquisition card, an interfering system, a balanced detector and a computer, wherein the scanning probe is connected with the swept source, the control card and the interfering system; the control card is connected with the computer and the high-speed acquisition card; the high-speed acquisition card is connected with the control card, the balanced detector and the computer; the interfering system comprises a fixed mirror, a reference arm and a coupling module and is connected with the swept source, the scanning probe and the balanced detector; the coupling module comprises a coupler; the balanced detector is connected with the interfering system and the high-speed acquisition card; and the computer is connected with the control card and the high-speed acquisition card. The system can realize the real-time displaying, controlling, storing, measuring and inquiring for two-dimensional scanning.
Description
Technical field
This utility model relates to technical field of image processing, relates in particular to a kind of swept light source OCT Real-time image display system.
Background technology
Optical coherence tomography (OCT) is a kind of emerging technology that occurs in recent ten years, it has high-resolution, can carry out in real time three-dimensional imaging, the important video imaging technology in field such as medical science, industry, health have been become, and the application of swept light source (SS) is brought the OCT technology into frequency domain, SS-OCT has than the higher dynamic range of time domain OCT in the past, and imaging data faster, and this is conducive to the OCT technology and realizes that real time scan shows.Yet will utilize fully easily this technology of SS-OCT, realize that the Real-time Two-dimensional image shows, measure, 3-D view reconstruct is analyzed, and information output etc. need the friendly man-machine interactive system of a cover.
Existing B ultrasonic, the image-forming principles such as CT and OCT are different, their flow chart of data processing is simple, and the data point of scanning is exactly corresponding image information, easily by corresponding the demonstration accomplished real-time demonstration simply one by one, and the scan-data of OCT and the final image that shows not are one-to-one relationship, need to just can obtain by the conversion of a series of mathematical operation corresponding image information.And to show in real time the processing speed of needs 30 frames, when in other words showing in real time, every demonstration one width of cloth figure, will do the conversion of once a series of mathematical operation, and 30 frames mean that the data that need to do 30 times are to the conversion of image, data flow is not done control, treatment step is done optimized the purpose that is difficult to reach the OCT Real-time image display.
The utility model content
The purpose of this utility model is to propose a kind of swept light source OCT Real-time image display system, can produce high-quality two and three dimensions OCT image, and described two-dimentional OCT image is shown in real time.
For reaching this purpose, system described in the utility model comprises:
Swept light source: be used for the time dependent infrared light of output wavelength, described infrared light is divided into two-way by interference system, and one the tunnel enters the reference arm of described interference system, and one the tunnel enters scanheads scans sample;
Scanheads: be connected with swept light source, control card and interference system, by the drive that control card is exported, be used for obtaining the optical signal that comprises sample message, described optical signal is outputed in the described interference system;
Control card: be connected with high-speed collection card with computer, be used for receiving computer instruction output synchronizing signal and drive signal, described synchronizing signal is used for the input high-speed collection card and carries out analog digital conversion control, and described driving signal is used for driving described scanheads;
High-speed collection card: be connected with computer with control card, balance detection device, be used for receiving the synchronizing signal of described control card input and the raw electrical signal that the balance detector sends; Be used for according to described synchronous signal impulse described raw electrical signal being carried out analog digital conversion, obtain the initial data that comprises described sample depth information, in described initial data input computer;
Interference system: comprise fixed mirror, reference arm and coupling module, wherein said coupling module comprises bonder, with swept light source, scanheads is connected with the balance detector, be used for receiving the infrared light of described swept light source output, described infrared light is divided into two-way by described bonder, one tunnel described infrared light enters described reference arm and reflects through described fixed mirror, another road enters described scanheads sample is scanned, generation comprises the optical signal of sample message, inputs described balance detection device for the interference signal that comprises sample message that interferes the reaction generation after two ways of optical signals is returned;
Balance detection device: be connected with high-speed collection card with interference system, be used for receiving the interference signal that described interference system sends, be used for the raw electrical signal that described interference signal converts to is inputted described high-speed collection card;
Computer: be connected with high-speed collection card with control card, be used for control card is sent scan instruction, be used for receiving the initial data of high-speed collection card output, be used for that described initial data is carried out fast fourier transform and obtain two-dimension picture; Be used for described two-dimension picture is shown.
Further, the described optical signal that comprises sample message is that the infrared light that described scanheads uses swept light source to send scans the information of obtaining to sample.Useful technique effect of the present utility model is real-time demonstration, control, storage, measurement and the inquiry that can realize the two-dimensional scan picture of OCT generation, need not to wait for.
Description of drawings
Fig. 1 is the system structure schematic diagram of this utility model embodiment one described OCT Real-time image display;
Fig. 2 is the display packing flow chart of the described OCT Real-time image display of this utility model embodiment one system;
Fig. 3 is this utility model embodiment two described OCT Real-time image display system of systems structured flowcharts.
The specific embodiment
Further specify the technical solution of the utility model below in conjunction with accompanying drawing and by the specific embodiment.
Embodiment one
Fig. 1 is the system structure schematic diagram of the described OCT Real-time image display of present embodiment, as described in Figure 1, the time dependent infrared light of swept light source output wavelength, described laser center wavelength is greater than 1250nm and less than 1350nm, be preferably 1310nm, this laser is divided into 2 the tunnel by bonder CP, one the tunnel enters the mirror that is fixed behind the reference arm is reflected back, one the tunnel enters scanheads, obtain comprising the optical signal of sample message behind the scanning samples, after returning, this former road of two-way light interferes, the interference signal that obtains enters the balance detection device, export after converting optical signal to comprise sample message the signal of telecommunication, the signal of high-speed collection card collection is exactly the signal of telecommunication that comprises sample message, but when gather, how to gather, will be according to other triggering signals, synchronizing signal such as light source swept-frequency signal and control card output, and the degree of depth of light source output gathers clock, gather, data after the collection were advanced the transmission of control backcasting machine, and the interactive software of computer carries out showing output after the FFT computing converts image to again.
Fig. 2 is the display packing flow chart of the described OCT Real-time image display of this utility model embodiment one system, and as shown in Figure 2, the display packing of the described OCT real time imaging of present embodiment system specifically comprises:
S201, swept light source are exported a branch of infrared light, control card output synchronizing signal and driving signal;
Swept light source output infrared light, described infrared light is divided into two-way by bonder, and one the tunnel enters reference arm, and one the tunnel enters scanheads;
During described swept light source work, the time dependent infrared light of output wavelength, described infrared light centre wavelength is 1310 nanometers, this laser is divided into two-way by the coupling module of interference system, one the tunnel enters the mirror that is fixed behind the reference arm is reflected back, and one the tunnel enters scanheads.
The signal of control card output comprises synchronizing signal and drives signal, present embodiment is exported five road signals as example take control card, one road signal is pulse synchronous signal, this signal comprises that dutycycle is 50% TTL signal M, N group, described pulse synchronous signal are used for analog digital conversion is controlled, preferably, wherein said M gets 512, and N gets 100 frames; Four the tunnel for driving signal, drives the signal input scan with described four the road and pop one's head in, and the driven sweep probe scans.
S202, drive scanheads use infrared light that sample is scanned, and obtain optical signal; Optical signal interferes the generation interference signal with the infrared light that the mirror that is fixed that enters reference arm is reflected back;
Described infrared light is divided into two-way by described coupling module, one tunnel described infrared light enters described reference arm and reflects through described fixed mirror, another road enters described scanheads sample is scanned, generation comprises the optical signal of sample message, after returning, two-way letter optical signal interferes reaction, generation comprises the interference signal of sample message, and described interference signal is inputted described balance detection device.
S203, balance detection device convert interference signal to raw electrical signal;
Described balance detection device is a kind of electrooptical device, contain two photodetectors that parameter is consistent, can do calculus of differences output, obtain containing the raw electrical signal of sample message, described raw electrical signal be outputed in real time the data acquisition input channel of described high-speed collection card.
S204, high-speed collection card are inputted initial data in the high-speed collection card internal memory one;
The triggering port of described high-speed collection card and external clock port, receive the depth-sampling signal of described synchronizing signal and swept light source, the corresponding depth scan point of described depth-sampling signal is 1024, the data acquisition channel of described high-speed collection card carries out analog digital conversion to the described raw electrical signal of balance detection device output, obtains comprising the initial data of the sample degree of depth.
Can adopt the sample rate can be in the above high-speed collection card of 200M/s, can gather according to the external clock frequency, the signal of high-speed collection card collection is exactly the signal of telecommunication that comprises sample message, but when gathering, how to gather, is will be according to other triggering signals, synchronizing signal such as light source swept-frequency signal, control card output, and the degree of depth collection clock of light source output, gather, in the data input high-speed collection card internal memory one after the collection.
S205, judge whether the initial data in the capture card reaches predetermined threshold value, if execution in step S206 then, otherwise return step S204;
The size of one frame picture is the 1024*512*2 byte, and 1024 is the depth scan point, and 512 are the line scanning point.The picture frame number of choosing at first is greater than 25 frames that human eye vision persists, and too small words can allow the people feel image flicker, and are too large, and data volume is crossed conference and caused transmission delay, affects live effect.Default frame number is preferably 30, so described predetermined threshold value is preferably the 30*1024*512*2 byte greater than the 20*1024*512*2 byte and less than the 100*1024*512*2 byte for being not less than 20 and be not more than 100.
S206, capture card internal memory one are inputted capture card internal memory two with the initial data of storage;
Described high-speed collection card internal memory one waits for when the original data storage amount reaches the threshold value of setting that just begin to be transferred in the high-speed collection card internal memory two, it is 30 frame picture initial data, i.e. 30*1024*512*2 bytes that threshold value can be set.
S207, capture card internal memory two input computer with initial data;
After internal memory two data storages is complete by the PCIE interface mode in real time with original data transmissions to computer.
S208, computer carry out fast fourier transform with initial data, obtain and Show Picture;
After computer was accepted described initial data, the FFT computing of the described initial data of each frame being carried out N*M obtained original image, and preferably, wherein said M gets 512, and N gets 100 frames.Computer outputs to original image on the display in real time and directly shows, does not do storage.
S209, determine whether and stop scanning, if execution in step S210 then, otherwise return step S201;
After click stops scanning, as dissatisfied to scanning, can restart scanning, return step S201, perhaps satisfied to scanning result, can preserve, can carry out three-dimensionalreconstruction to picture after the preservation, carry out three-dimensional section and show.
S210, with the picture-storage of obtaining.
Embodiment two
Fig. 3 is the described OCT Real-time image display of present embodiment system of systems structured flowchart, and as shown in Figure 3, the described OCT Real-time image display of present embodiment system comprises:
Swept light source: be used for the time dependent infrared light of output wavelength, described infrared light is divided into two-way by the coupling module of interference system, and one the tunnel enters the reference arm of described interference system, and one the tunnel enters scanheads scans sample;
Scanheads: be connected with swept light source, control card and interference system, the drive of being exported by control card, the infrared light that uses swept light source to send scans sample, produces the optical signal that comprises sample message, and described optical signal is outputed in the described interference system;
Control card: be connected with high-speed collection card with computer, be used for receiving computer instruction output synchronizing signal and drive signal, described synchronizing signal is used for the input high-speed collection card and carries out analog digital conversion control, and described driving signal is used for driving described scanheads;
High-speed collection card: be connected with computer with control card, balance detection device, be used for receiving the synchronizing signal of described control card input and the raw electrical signal that the balance detector sends; According to described synchronous signal impulse described raw electrical signal is carried out analog digital conversion, obtain the initial data that comprises described sample depth information, in described initial data input computer;
Interference system: comprise fixed mirror, reference arm and coupling module, wherein said coupling module comprises bonder, with swept light source, scanheads is connected with the balance detector, be used for receiving the infrared light of described swept light source output, described infrared light is divided into two-way by described coupling module, one tunnel described infrared light enters described reference arm and reflects through described fixed mirror, another road enters described scanheads sample is scanned, generation comprises the optical signal of sample message, after returning, two-way letter optical signal interferes reaction, generation comprises the interference signal of sample message, and described interference signal is inputted described balance detection device;
Balance detection device: be connected with high-speed collection card with interference system, be used for receiving the interference signal that described interference system sends, convert described interference signal to raw electrical signal, described raw electrical signal is inputted described high-speed collection card;
Computer: be connected with high-speed collection card with control card, be used for control card is sent scan instruction, be used for receiving the initial data of high-speed collection card output, described initial data is carried out fast fourier transform obtain two-dimension picture; Be used for described two-dimension picture is shown.
Further, the centre wavelength of described infrared light is preferably 1310nm greater than 1250nm and less than 1350nm.
The described OCT Real-time image display of the display packing of the described OCT Real-time image display of this utility model embodiment one system and embodiment two system can realize real-time demonstration, control, storage, measurement and the inquiry of two-dimensional scan picture that OCT is produced, need not to wait for.
All or part of content in the technical scheme that above embodiment provides can realize that by software programming its software program is stored in the storage medium that can read, storage medium for example: the hard disk in the computer, CD or floppy disk.
The above only is preferred embodiment of the present utility model, and is in order to limit this utility model, not all within spirit of the present utility model and principle, any modification of doing, is equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (2)
1. a swept light source OCT Real-time image display system is characterized in that, comprising:
Swept light source: be used for the time dependent infrared light of output wavelength, described infrared light is divided into two-way by interference system, and one the tunnel enters the reference arm of described interference system, and one the tunnel enters scanheads scans sample;
Scanheads: be connected with swept light source, control card and interference system, by the drive that control card is exported, be used for obtaining the optical signal that comprises sample message, described optical signal is outputed in the described interference system;
Control card: be connected with high-speed collection card with computer, be used for receiving computer instruction output synchronizing signal and drive signal, described synchronizing signal is used for the input high-speed collection card and carries out analog digital conversion control, and described driving signal is used for driving described scanheads;
High-speed collection card: be connected with computer with control card, balance detection device, be used for receiving the synchronizing signal of described control card input and the raw electrical signal that the balance detector sends; Be used for according to described synchronous signal impulse described raw electrical signal being carried out analog digital conversion, obtain the initial data that comprises described sample depth information, in described initial data input computer;
Interference system: comprise fixed mirror, reference arm and coupling module, wherein said coupling module comprises bonder, with swept light source, scanheads is connected with the balance detector, be used for receiving the infrared light of described swept light source output, described infrared light is divided into two-way by described bonder, one tunnel described infrared light enters described reference arm and reflects through described fixed mirror, another road enters described scanheads sample is scanned, generation comprises the optical signal of sample message, inputs described balance detection device for the interference signal that interferes the reaction generation after two ways of optical signals is returned;
Balance detection device: be connected with high-speed collection card with interference system, be used for receiving the interference signal that described interference system sends, be used for the raw electrical signal that described interference signal converts to is inputted described high-speed collection card;
Computer: be connected with high-speed collection card with control card, be used for control card is sent scan instruction, be used for receiving the initial data of high-speed collection card output, be used for that described initial data is carried out fast fourier transform and obtain two-dimension picture; Be used for described two-dimension picture is shown.
2. OCT Real-time image display as claimed in claim 1 system is characterized in that, the described optical signal that comprises sample message is that the infrared light that described scanheads uses swept light source to send scans the information of obtaining to sample.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102835948A (en) * | 2012-09-12 | 2012-12-26 | 无锡微奥科技有限公司 | SS-OCT real-time image display method and system thereof |
| CN103784120A (en) * | 2014-02-26 | 2014-05-14 | 中国科学院光电技术研究所 | Tumor boundary intraoperative detection instrument based on sweep frequency OCT technology |
| CN104144274A (en) * | 2014-07-16 | 2014-11-12 | 北京赛智创业科技有限公司 | Laser scanning imaging system and method |
| CN109343374A (en) * | 2018-09-12 | 2019-02-15 | 厦门大学 | A kind of impulsive synchronization control two-dimensional scanning and signal acquisition implementation method based on LabVIEW |
-
2012
- 2012-09-12 CN CN201220465468.4U patent/CN202776268U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102835948A (en) * | 2012-09-12 | 2012-12-26 | 无锡微奥科技有限公司 | SS-OCT real-time image display method and system thereof |
| CN102835948B (en) * | 2012-09-12 | 2016-03-30 | 无锡微奥科技有限公司 | A kind of swept light source OCT Real-time image display method and system thereof |
| CN103784120A (en) * | 2014-02-26 | 2014-05-14 | 中国科学院光电技术研究所 | Tumor boundary intraoperative detection instrument based on sweep frequency OCT technology |
| CN103784120B (en) * | 2014-02-26 | 2015-05-20 | 中国科学院光电技术研究所 | Tumor boundary intraoperative detection instrument based on sweep frequency OCT technology |
| CN104144274A (en) * | 2014-07-16 | 2014-11-12 | 北京赛智创业科技有限公司 | Laser scanning imaging system and method |
| CN104144274B (en) * | 2014-07-16 | 2017-11-28 | 北京赛智创业科技有限公司 | Laser scanning imaging system and method |
| CN109343374A (en) * | 2018-09-12 | 2019-02-15 | 厦门大学 | A kind of impulsive synchronization control two-dimensional scanning and signal acquisition implementation method based on LabVIEW |
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Granted publication date: 20130313 |