CN201207035Y - Light acoustic imaging apparatus based on multi-element phase-controlled focus ring array - Google Patents
Light acoustic imaging apparatus based on multi-element phase-controlled focus ring array Download PDFInfo
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- CN201207035Y CN201207035Y CNU2008201114974U CN200820111497U CN201207035Y CN 201207035 Y CN201207035 Y CN 201207035Y CN U2008201114974 U CNU2008201114974 U CN U2008201114974U CN 200820111497 U CN200820111497 U CN 200820111497U CN 201207035 Y CN201207035 Y CN 201207035Y
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- ring array
- ultrasonic detector
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- array ultrasonic
- laser generator
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Abstract
Disclosed is a photoacoustic imaging device based on a multi-element phased focusing ring array, which is characterized in that a computer is connected with a step driver and a signal preprocessor through a digital controller card; the step driver is connected with a three-dimensional scanning platform, to which a sample bench and a multi-element ring array ultrasonic detector are connected. The computer is connected with a digital oscillograph through a bus communication card, and the digital oscillograph is connected with a laser generator and the signal preprocessor. The laser generator is connected with the multi-element ring array ultrasonic detector through optical fibers. The photoacoustic imaging device improves imaging resolution and can realize focal scanning imaging in both the X direction and the Y direction. Adopting computing phased focusing technology, the photoacoustic imaging device can effectively improve signal-to-noise ratio of the signal and can realize A type dynamic focal scanning imaging in depth in the Z direction. Adopting backward mode to receive the photoacoustic signals, the photoacoustic imaging device can greatly improve the maneuverability and the application range of the system.
Description
Technical field
The utility model relates to a kind of test measurement device, is specifically related to a kind of opto-acoustic imaging devices based on multiple phase control focusing ring array.
Background technology
At present the measurement pattern of photoacoustic imaging has forward direction, side direction and three kinds of patterns dorsad: because the high scattering of bio-tissue, the scope of application of forward mode system is very little; The lateral mode system adopts modes such as detector rotation sweep, sample rotation sweep, planar linear scanning to obtain the distribution that optoacoustic is pressed in certain plane usually, again by the counter light absorption distributed image of releasing the space of specific reconstruction algorithm, this mode has very high spatial resolution, but its time resolution is lower, imaging algorithm is complicated, spatial directivity is poor, and because the feature limits of biosome, this scan mode usually can't be practical.
Usually system detector and excitation source place the same side of biosome, and this measurement pattern is called pattern dorsad.The detector of this pattern employing has high frequency focus detector, piezoceramic disk film explorer and dicyclo detector at present.Wide-aperture high frequency focus detector can obtain good signal to noise ratio (S/N ratio), but it focuses on focal spot and burnt length limits its imaging resolution and imaging visual angle, and the rapid decay of signal in tissue also limited its investigation depth; The piezoceramic disk film explorer has very high temporal resolution, and the longitudinal frame of three-dimensional imaging can reach tens microns, but its directivity and poor signal to noise; The dicyclo detector has narrower aperture angle and certain direction directive property, but its less aperture makes the signal to noise ratio (S/N ratio) of collection relatively poor, and can't realize the dynamic focusing of depth direction.
Summary of the invention
The purpose of this utility model is to provide a kind of high resolving power and the easy to operate opto-acoustic imaging devices based on multiple phase control focusing ring array at the shortcoming of prior art existence:
The utility model is achieved like this, it comprises computing machine, step actuator, signal preprocessor, digital oscilloscope, laser generator, optical fiber, polynary ring array ultrasonic detector, the 3-D scanning platform, sample stage, it is characterized in that computing machine is by digital control card connection step actuator and signal preprocessor, step actuator connects the 3-D scanning platform, be connected with sample stage and polynary ring array ultrasonic detector on the 3-D scanning platform, computing machine is by bus communication card connection digital oscilloscope, digital oscilloscope connects laser generator and signal preprocessor, laser generator connects polynary ring array ultrasonic detector by optical fiber, and polynary ring array ultrasonic detector connects signal processor.Polynary ring array ultrasonic detector is a homalographic, equidistantly and the piezoelectric element of hollow, and its central authorities are coupled with optical fiber head, and the number of detector rings should be more than two.
The using method of the utility model device comprises the steps:
(1) with receiving the pulsed laser radiation sample of wonderful level pulsewidth, it is the photoacoustic signal of megahertz that sample produces frequency;
(2) survey acoustic pressure in degree of depth Z direction with polynary ring array ultrasonic detector and distribute, select two paths of signals to advance computing machine by the digital oscilloscope collection by control card at every turn, repeat this step, the signal on each ring has all been gathered;
(3) acoustic pressure by step motor drive scanning X-Y two dimensional surface distributes, and the three-dimensional optical that reconstructs sample absorbs and distributes.
In the described step (1), select to comprise the light that wavelength coverage is a specific wavelength component among 400nm～2500nm.
In the described step (3), obtain photoacoustic image by calculating phase-control focusing technology back projection.
The utility model has the advantages that: adopt polynary ring detector array, its super narrow aperture angle and good direction directive property have improved imaging resolution greatly, all can realize the focusing scanning imaging at X and Y direction; Adopt and calculate the phase-control focusing technology, can effectively improve the signal to noise ratio (S/N ratio) of signal, can realize the A type dynamic focusing scanning imagery of degree of depth Z direction; Adopt pattern reception photoacoustic signal dorsad, can greatly improve the operability and the scope of application of system.
Description of drawings
Fig. 1 is a principle of work synoptic diagram of the present utility model.
Embodiment
As shown in Figure 1, the utility model comprises computing machine 1, step actuator 7, signal preprocessor 6, digital oscilloscope 5, laser generator 4, optical fiber 8, polynary ring array ultrasonic detector 9,3-D scanning platform 10, sample stage 11, computing machine 1 connects step actuator 7 and signal preprocessor 6 by digital control card 3, step actuator connects 3-D scanning platform 10, be connected with sample stage 11 and polynary ring array ultrasonic detector 9 on the 3-D scanning platform, computing machine connects digital oscilloscope 5 by bus communication card 2, digital oscilloscope connects laser generator 4 and signal preprocessor 6, laser generator 4 connects polynary ring array ultrasonic detector 9 by optical fiber 8, and polynary ring array ultrasonic detector 9 connects signal processor 6.During use, computing machine 1 is by digital control card 3 and step actuator 7 control 3-D scanning platform 10 mobile example platforms 11 or polynary ring array ultrasonic detectors 9, receive photoacoustic signal by polynary ring array ultrasonic detector 9, amplify through signal preprocessor 6, after multichannel selects filtering etc. to handle, be transferred to computing machine 1 by digital oscilloscope 5 collections through bus communication card 2, computing machine 1 sends gating code by digital control card 3 at every turn and selects the two-way in the multiple signals to enter digital oscilloscope 5 collections, synchronization output signal triggered digital oscillograph 5 acquired signal of laser instrument 4, wherein photoacoustic signal is coupled to polynary ring array ultrasonic detector 9 by acoustic coupling liquid 12, is placed on the sample stage 11 by the sample of imaging.
Claims (2)
1, a kind of opto-acoustic imaging devices based on multiple phase control focusing ring array, it comprises computing machine, step actuator, signal preprocessor, digital oscilloscope, laser generator, optical fiber, polynary ring array ultrasonic detector, the 3-D scanning platform, sample stage, it is characterized in that computing machine is by digital control card connection step actuator and signal preprocessor, step actuator connects the 3-D scanning platform, be connected with sample stage and polynary ring array ultrasonic detector on the 3-D scanning platform, computing machine is by bus communication card connection digital oscilloscope, digital oscilloscope connects laser generator and signal preprocessor, laser generator connects polynary ring array ultrasonic detector by optical fiber, and polynary ring array ultrasonic detector connects signal processor.
2, a kind of according to claim 1 opto-acoustic imaging devices based on multiple phase control focusing ring array, it is characterized in that polynary ring array ultrasonic detector is a homalographic, equidistantly and the piezoelectric element of hollow, its central authorities are coupled with optical fiber head, and the number of detector rings should be more than two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201114974U CN201207035Y (en) | 2008-04-23 | 2008-04-23 | Light acoustic imaging apparatus based on multi-element phase-controlled focus ring array |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201114974U CN201207035Y (en) | 2008-04-23 | 2008-04-23 | Light acoustic imaging apparatus based on multi-element phase-controlled focus ring array |
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| CN201207035Y true CN201207035Y (en) | 2009-03-11 |
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| CNU2008201114974U Expired - Fee Related CN201207035Y (en) | 2008-04-23 | 2008-04-23 | Light acoustic imaging apparatus based on multi-element phase-controlled focus ring array |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102068277A (en) * | 2010-12-14 | 2011-05-25 | 哈尔滨工业大学 | Method and device for observing photoacoustic imaging in single-array element and multi-angle mode based on compressive sensing |
| CN102183464A (en) * | 2011-01-28 | 2011-09-14 | 华南理工大学 | Linear array optical fiber coupling photoacoustic detection system and detection method thereof |
| CN102854141A (en) * | 2012-08-28 | 2013-01-02 | 曾吕明 | Portable integrated optical resolution type photoacoustic microscope |
| CN103200875A (en) * | 2010-10-27 | 2013-07-10 | 富士胶片株式会社 | Photoacoustic imaging apparatus and operating method therefor |
| CN103476327A (en) * | 2011-02-10 | 2013-12-25 | 佳能株式会社 | Acoustic wave acquisition apparatus |
| CN105527345A (en) * | 2016-01-15 | 2016-04-27 | 北京工业大学 | Defect positioning method for condensed laser sensor array based Lamb corrugated plate structure |
| CN111948147A (en) * | 2020-09-25 | 2020-11-17 | 广东工业大学 | Non-blind-zone full-field ultrasonic microscope imaging system and method thereof |
-
2008
- 2008-04-23 CN CNU2008201114974U patent/CN201207035Y/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9649034B2 (en) | 2010-10-27 | 2017-05-16 | Fujifilm Corporation | Photoacoustic imaging apparatus and method for operating a photoacoustic imaging apparatus |
| CN103200875A (en) * | 2010-10-27 | 2013-07-10 | 富士胶片株式会社 | Photoacoustic imaging apparatus and operating method therefor |
| CN103200875B (en) * | 2010-10-27 | 2015-08-19 | 富士胶片株式会社 | Opto-acoustic imaging devices and the method for operational light acoustic imaging apparatus |
| CN102068277B (en) * | 2010-12-14 | 2013-03-13 | 哈尔滨工业大学 | Method and device for observing photoacoustic imaging in single-array element and multi-angle mode based on compressive sensing |
| CN102068277A (en) * | 2010-12-14 | 2011-05-25 | 哈尔滨工业大学 | Method and device for observing photoacoustic imaging in single-array element and multi-angle mode based on compressive sensing |
| CN102183464A (en) * | 2011-01-28 | 2011-09-14 | 华南理工大学 | Linear array optical fiber coupling photoacoustic detection system and detection method thereof |
| CN103476327A (en) * | 2011-02-10 | 2013-12-25 | 佳能株式会社 | Acoustic wave acquisition apparatus |
| US9417179B2 (en) | 2011-02-10 | 2016-08-16 | Canon Kabushiki Kaisha | Acoustic wave acquisition apparatus |
| CN102854141A (en) * | 2012-08-28 | 2013-01-02 | 曾吕明 | Portable integrated optical resolution type photoacoustic microscope |
| CN105527345A (en) * | 2016-01-15 | 2016-04-27 | 北京工业大学 | Defect positioning method for condensed laser sensor array based Lamb corrugated plate structure |
| CN105527345B (en) * | 2016-01-15 | 2018-12-25 | 北京工业大学 | The defect positioning method of Lamb wave plate structure based on intensive laser sensor array |
| CN111948147A (en) * | 2020-09-25 | 2020-11-17 | 广东工业大学 | Non-blind-zone full-field ultrasonic microscope imaging system and method thereof |
| CN111948147B (en) * | 2020-09-25 | 2023-07-25 | 广东工业大学 | Non-blind area full-field ultrasonic microscope imaging system and method thereof |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090311 Termination date: 20100423 |