CN102697525B - Full-focus eye-ground color doppler ultrasound imaging method - Google Patents
Full-focus eye-ground color doppler ultrasound imaging method Download PDFInfo
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Abstract
The invention discloses a full-focus eye-ground color doppler ultrasound imaging method. The method comprises the following steps: using an ultrasonic host system, a video output equipment, an ultrasonic energy converter, a transmitting unit on the ultrasonic energy converter, and an ultrasonic host system as singlechips for signal processing; and implementing the scanning for a frame of image of the eye-grounds according to the following steps: transmitting the ultrasonic signals by the ultrasonic energy converting probe in a manner of spherical-wave transmission from one side to the other side, receiving any received wave beam formed at the periphery of each spherical wave, feeding back the information of the received wave beams to the ultrasonic host system, overlapping the received wave beams by the ultrasonic host system when the former and later spherical waves are transmitted, and obtaining a frame of the image after scanning one frame, wherein the image comprises multiple received wave beams which are overlapped for many times, and the received wave beams are used for the normal imaging process and finally displayed on the video output equipment. The imaging method can realize the ultrasonic scanning through the sound power which is 1/64-1/128 of that of traditional ultrasound so as to ensure the eye scanning safety.
Description
Technical field
The present invention relates to a kind of medical-diagnosis instrument, illustrate further as optical fundus color ultrasound formation method.
Background technology
Eyes are the most accurate in human body, one of the most complicated organ.The misery that the damage of the disease of eyes, particularly vision and loss bring to patient is self-evident, and the loss bringing to national economy is also huge.The disease of eyes, had both comprised and the disease of ophthalmic optical system (cornea, iris, crystalline lens, vitreous body etc.) had also comprised the disease that eye socket optical fundus part (retina, optic nerve, blood vessel network, optical fundus tumor etc.) may occur.Existing clinical image means are very limited for the diagnosis capability of optical fundus part, and bring the probability of optical fundus secondary damage larger.For example: existing hyperfrequency ophthalmology is ultrasonic is all ultrasonic for the black and white of ophthalmic optical system.Single array element mechanical sector scanning formula structure that the ultrasonic operation technique content of this class is very low, ability does not realize color ultrasound, there is no the blood flow form imaging of ability to optical fundus, more can not make quantitative analysis to blood flow.The accuracy that this has limited diagnostic of retinal function disease greatly, can not complete the task of finding optical fundus tumor or other pathological changes.
Existing existing general ultrasonic technique has been not enough to the chromoscan on optical fundus.This is mainly for two reasons.One, the very low single array element mechanical sector scanning formula structure of the super operation technique content of existing high frequency eye, the scanning line control that does not have ability to realize fast and flexible also just can not realize color ultrasound scanning.Two, traditional arrayed ultrasonic is being difficult to meet the task of scanning eyes aspect acoustical power safety.Eyes are human body organs of the most accurate sensitivity.Cross the secondary damage that strong ultrasonic incident may cause eyes.The FDA of food and medicine surveillance authority of the U.S. stipulates that the mechanical index of common ultrasonic scanning requires below 1.9, and optical fundus color ultrasound need to be below 0.23; Conventionally the heat number of ultrasonic scanning requires below 6, and optical fundus color ultrasound need to be below 1.In other words, under identical frequency, can only be 12% of common ultrasonic device for the ultrasonic pressure of eye scanning, corresponding ultrasonic projectile energy is only common ultrasonic 1.4%.Use so low projectile energy, the ultrasonic device of common framework is not enough to form the ultrasonic echo that can detect, and causes useful signal to be flooded by noise and cannot imaging.
Summary of the invention
In order to address the above problem, the invention provides a kind of total focus optical fundus color ultrasound formation method.
The method comprises the ultrasonic host computer system of use, picture output device, the transmitting array element on ultrasonic transducer and ultrasonic transducer, and ultrasonic host computer system is used as the single-chip microcomputer of signal processing, and in the following manner optical fundus is carried out the scanning of a two field picture:
A, by ultrasonic wave transducer probe from a side to opposite side with spherical wave radiation pattern transmitting ultrasonic signal.Spherical wave radiation pattern arranges according to it, launches with 1-4 array element at every turn.
B also receives each spherical wave by the upper multiple array element of ultrasonic wave transducer probe and forms any received beam around, and received beam direction be perpendicular to ultrasonic wave transducer probe plane and the inclination ultrasonic wave transducer plane of popping one's head in; And received beam information is fed back to ultrasonic host computer system.
The received beam that c, ultrasonic host computer system produce when each front and back spherical wave is launched superposes, scan a frame, can obtain piece image, many the received beams that were applied are repeatedly wherein comprised, and be applied received beam repeatedly for conventional imaging processing by described many, finally on picture output device, show.
Described many were applied received beam repeatedly for conventional imaging processing, and imaging processing comprises demodulation, dynamic filter, Coordinate Conversion, image smoothing, image filtering Digital Signal Processing herein.
The spherical wave radiation pattern of this method arranges according to it, at every turn with single array element transmitting; Or launch in 1-4 array element mode at every turn, when transmitting, intersect successively and stacked system meter (array element 1, array element 2), (array element 2, array element 3); (array element 3, array element 4), until last array element.
Beneficial effect of the present invention is:
So be 1, common ultrasonic small part because only use the acoustical power of the very each transmitting in aperture of fraction at every turn.The signal to noise ratio of system is retained by the algorithm of synthetic echo signal.
2, realize ultrasonic scanning with the acoustical power of conventional ultrasound 1/64 to 1/128, guarantee the safety of eye scanning.
3, not loss system picture quality and frame frequency in low power transmissions situation.
Accompanying drawing explanation
Fig. 1 scanning and with receive ripple schematic diagram.
Detailed description of main elements: 1-launches array element; 2-received beam.
The specific embodiment
Understand following content with reference to Fig. 1:
Be equivalent to the multiple array element 1 of conventional ultrasound and launch the single wave beam that produce power is very strong simultaneously, the main feature of this technology is to adopt small-bore transmitting, simultaneously, around the small-bore of transmitting, form multiple received beams 2, such as being 128 array elements, and between array element, line density is 2 situation, can form at most 256 received beams 2.If aperture is little of single matrix element, every piece image will be launched 128 times.Common 64 road received beams 2 are enough.If each transmitting forms 64 lines, and every frame is launched 128 times, produces so altogether 128x64 line, or be labeled as B (m, n), wherein m=0～127, the transmitting sequence of this wave beam of labelling in image, n=0～63, the received locus of this wave beam of labelling.
The same with common ultra sonic imaging, each frame scan all, from probe Far Left, in i array element transmitting, produces take i array element as 64 symmetrical received beams, is labeled as:
[B(i-32，63)B(i-31，62)B(i-30，61)…………….……...B(i，32)B(i+1，31)….B(i+31，0)]
In the transmitting of i+1 array element, same generation take i+1 array element as 64 symmetrical received beams.
[B(i-31，63)B(i-30，62)B(i-29，61)……B(i，33)B(i+1，32)….B(i+31，1)B(i+32，0)]
Note that in this two group of 64 wave beam, having 62 wave beams is wave beams that same position forms on geometric position, need completely superimposed.And B (i, 0) should be output, B (i+1,63), for the up-to-date wave beam in 64 wave beams of storage, will be applied 63 times.Scanned a frame, formed 128 and be applied the received beam line that synthesized 63 times, these 128 received beams will do according to common ultra sonic imaging processing the image works for the treatment of such as Coordinate Conversion.
Finally be used for showing that the wave beam of B pattern black white image is:
BF(0～127，0～4095)＝sum(B(0～127，0～63，0～4095)，2)；
Because the linear principle of transonic, each after aperture is synthetic receives line and is all equivalent to 128 array elements and launches the effect that 64 array elements receive simultaneously simultaneously and that is to say, uses the synthetic imaging mode in total focus aperture can reach even better signal to noise ratio consistent with conventional ultrasound formation method.Simultaneously because the each acoustical power that only uses the acoustical power of very little aperture (minimum is a single matrix element) system transmitting to be significantly smaller than conventional ultrasound of this radiation pattern.Minimum can reach conventional ultrasound acoustical power 1/128 and do not lose that image penetrates and signal to noise ratio.
Claims (3)
1. total focus optical fundus color ultrasound formation method, the method comprises the ultrasonic host computer system of use, picture output device, the transmitting array element of ultrasonic wave transducer probe and ultrasonic wave transducer probe, ultrasonic host computer system, as the single-chip microcomputer of signal processing, is characterized in that:
In the following manner optical fundus is carried out the scanning of a two field picture:
A, by ultrasonic wave transducer probe from a side to opposite side with spherical wave radiation pattern transmitting ultrasonic signal;
Spherical wave radiation pattern arranges according to it, launches with 1-4 array element at every turn;
B also receives each spherical wave by the upper multiple array element of ultrasonic wave transducer probe and forms any received beam around, and received beam direction be perpendicular to ultrasonic wave transducer probe plane and the inclination ultrasonic wave transducer plane of popping one's head in; And received beam information is fed back to ultrasonic host computer system;
The received beam that c, ultrasonic host computer system produce when each front and back spherical wave is launched superposes, scan a frame, can obtain piece image, many the received beams that were applied are repeatedly wherein comprised, and be applied received beam repeatedly for conventional imaging processing by described many, finally on picture output device, show.
2. total focus as claimed in claim 1 optical fundus color ultrasound formation method, is characterized in that any received beam is more than 1.
3. total focus as claimed in claim 1 optical fundus color ultrasound formation method, it is characterized in that, described many were applied received beam repeatedly for conventional imaging processing, and imaging processing comprises demodulation, dynamic filter, Coordinate Conversion, image smoothing, image filtering Digital Signal Processing herein.
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| CN107374670A (en) * | 2017-07-20 | 2017-11-24 | 朗昇科技（苏州）有限公司 | A kind of synthetic aperture supersonic imaging device and method |
| CN109998599A (en) * | 2019-03-07 | 2019-07-12 | 华中科技大学 | A kind of light based on AI technology/sound double-mode imaging fundus oculi disease diagnostic system |
| CN113080842B (en) * | 2021-03-15 | 2023-06-27 | 青岛小鸟看看科技有限公司 | Head-mounted vision testing equipment, vision testing method and electronic equipment |
Citations (4)
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|---|---|---|---|---|
| US5615675A (en) * | 1996-04-19 | 1997-04-01 | Regents Of The University Of Michigan | Method and system for 3-D acoustic microscopy using short pulse excitation and 3-D acoustic microscope for use therein |
| CN1342502A (en) * | 2001-11-05 | 2002-04-03 | 北京源德生物医学工程股份有限公司 | Focusing ultrasonic source |
| CN102123668A (en) * | 2008-06-26 | 2011-07-13 | 维拉声学公司 | High frame rate quantitative doppler flow imaging using unfocused transmit beams |
| CN102210910A (en) * | 2010-04-02 | 2011-10-12 | 重庆融海超声医学工程研究中心有限公司 | Ultrasonic transducer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5615675A (en) * | 1996-04-19 | 1997-04-01 | Regents Of The University Of Michigan | Method and system for 3-D acoustic microscopy using short pulse excitation and 3-D acoustic microscope for use therein |
| CN1342502A (en) * | 2001-11-05 | 2002-04-03 | 北京源德生物医学工程股份有限公司 | Focusing ultrasonic source |
| CN102123668A (en) * | 2008-06-26 | 2011-07-13 | 维拉声学公司 | High frame rate quantitative doppler flow imaging using unfocused transmit beams |
| CN102210910A (en) * | 2010-04-02 | 2011-10-12 | 重庆融海超声医学工程研究中心有限公司 | Ultrasonic transducer |
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