CN206151437U - Multimode microwave imaging device - Google Patents
Multimode microwave imaging device Download PDFInfo
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- CN206151437U CN206151437U CN201521139611.0U CN201521139611U CN206151437U CN 206151437 U CN206151437 U CN 206151437U CN 201521139611 U CN201521139611 U CN 201521139611U CN 206151437 U CN206151437 U CN 206151437U
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Abstract
The utility model relates to a multimode microwave imaging device, microwave signal generating unit takes pulse signal and microwave single -frequency coherent signal to the little wave width of regional emergence that awaits measuring, microwave signal receiving unit receive microwave wideband pulse echo signal and microwave single -frequency echo signal, radar imaging Unit generates the radar detection image according to little wave width tape pulse echo signal, tomoscan imaging Unit generates the tomoscan image according to microwave single -frequency echo signal, the image output unit will the radar detection image with the tomoscan image fuses output. The utility model discloses in -process the early cancer patient of diagnosis can be had complementary advantages through using different imaging modality, successfully merges these two kinds of techniques, constitutes one set of multimode microwave mammary gland imaging system, reaches the good and bad complemental purpose of formation of image.
Description
Technical field
The utility model is related to a kind of fusing device of image, more particularly to a kind of radar detection image and faulted scanning pattern
The fusing device of picture.
Background technology
In medical detection process, generally include X-ray and take the photograph piece, color ultrasound, magnetic resonance and histology.X-ray takes the photograph piece point
Resolution is high, but along with ionising radiation, is not suitable for the generaI investigation of patient.Color ultrasound detects "dead" infringement, but to part cancer
Disease sufferer, calcification point and burr poplar structure can not show, and big by inspecting doctor's experience influence.Magnetic resonance is costly, during imaging
Between long, and histological examination also needs to be accurately positioned, and such as molybdenum target is inducted into pin, color ultrasound guidance and enters pin.Therefore, these current inspections
Survey means are not particularly suited for large-scale cancer sufferer examination, in particular for the vast rural area of China, medical facilities and
Under the conditions of popularization is very unbalanced, and the clinical detection of microwave imaging has without ionising radiation, low cost, effect and X-ray phase
When, can long term monitoring feature, the important tool of my excessively extensive examination can be become.
In microwave Imaging Technique, the scanning technique of microwave antenna has important function, is pin especially for breast imaging
To subregion, while and with definite shape, the shape and scan mode of microwave antenna have important function to breast imaging.
Prior art does not have the Microwave Scanning apparatus and method for being specifically designed for breast, and imaging effect is subject to extreme influence.
Utility model content
The utility model solve technical problem be：A kind of multi-modal Apparatus of Microwave Imaging is built, prior art list is overcome
One detection device can not carry out unified technical problem to two kinds of images.
The technical solution of the utility model is：A kind of multi-modal Apparatus of Microwave Imaging is provided, including there is list in microwave signal
Unit, microwave signal receiving unit, radar imagery unit, Tomography unit, image output unit, the microwave signal is sent out
There is microwave broadband pulse signal and microwave single-frequency coherent signal in raw unit, the microwave signal receiving unit connects to region to be measured
Microwave broadband pulse echo signal and microwave single-frequency echo-signal are received, the radar imagery unit is according to microwave broadband pulse echo
Signal generation radar detection image, the Tomography unit is according to microwave single-frequency echo signal form faulted scanning pattern
The radar detection image and the tomoscan image are carried out fusion output by picture, described image output unit.
Further technical scheme of the present utility model is：The microwave signal generating unit includes that microwave occurs module and micro-
Ripple transmitting antenna, the microwave signal receiving unit includes microwave antenna.
Further technical scheme of the present utility model is：The microwave transmitting antenna and the microwave antenna are same
Microwave antenna, the microwave transmitting antenna and the microwave antenna alternation.
Further technical scheme of the present utility model is：It is multiple that the microwave occurs module, and microwave broadband occurs respectively
Pulse signal and microwave single-frequency coherent signal.
Further technical scheme of the present utility model is：It is one that the microwave occurs module, and microwave broadband alternately occurs
Pulse signal and microwave single-frequency coherent signal.
Further technical scheme of the present utility model is：The microwave transmitting antenna and the microwave antenna are around to be measured
Region rotates.
Further technical scheme of the present utility model is：The microwave transmitting antenna and the microwave antenna are arranged to
Ring-type.
Further technical scheme of the present utility model is：The microwave transmitting antenna and the microwave antenna are arranged to
Linear shape.
It is of the present utility model to have the technical effect that：A kind of multi-modal Apparatus of Microwave Imaging is built, including there is list in microwave signal
Unit, microwave signal receiving unit, radar imagery unit, Tomography unit, image output unit, the microwave signal is sent out
There is microwave broadband pulse signal and microwave single-frequency coherent signal in raw unit, the microwave signal receiving unit connects to region to be measured
Microwave broadband pulse echo signal and microwave single-frequency echo-signal are received, the radar imagery unit is according to microwave broadband pulse echo
Signal generation radar detection image, the Tomography unit is according to microwave single-frequency echo signal form faulted scanning pattern
The radar detection image and the tomoscan image are carried out fusion output by picture, described image output unit.It is early in diagnosis
Can be had complementary advantages by using different image modes during phase cancer patient, microwave radar imaging utilizes ultra-wide
High-resolution of the target scattering center in distance is obtained with microwave signal, then using doppler information, in being scattered
High-resolution of the heart in lateral separation, both combinations can obtain the two dimension or dimensional resolution of target, so that target
Multidigit high-resolution is achieved.Microwave Tomography is by low power microwave directive testee, in the excitation of microwave
Lower measured object produces a scattered field, and the scattered field is relevant with the complex dielectric permittivity distribution inside measured object, by the scattering
The measurement of thing, obtains the relative dielectric constant of measured object and the distribution of electrical conductivity, obtains by carrying out after corresponding information processing
The microwave wave circuits and systems of measured object internal object.By both technology successful fusions in the utility model, a set of multimode is constituted micro-
Ripple breast imaging system, reaches the good and bad complementary purpose of imaging.
Description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is structure chart of the present utility model.
Specific embodiment
With reference to specific embodiment, technical solutions of the utility model are further illustrated.
As shown in Figure 1 and Figure 2, specific embodiment of the present utility model is：The utility model builds a kind of multi-modal microwave
Imaging system, including microwave signal generating unit 1, microwave signal receiving unit 2, radar imagery unit 3, Tomography list
There is microwave broadband pulse signal and microwave list to region to be measured in unit 4, image output unit 5, the microwave signal generating unit 1
Frequency coherent signal, the microwave signal receiving unit 2 receives microwave broadband pulse echo signal and microwave single-frequency echo-signal, institute
State radar imagery unit 3 and radar detection image, the Tomography unit 4 are generated according to microwave broadband pulse echo signal
According to microwave single-frequency echo signal form tomoscan image, described image output unit 5 is by the radar detection image and institute
State and carry out in tomoscan image fusion output.
Specific implementation process is as follows：There is microwave broadband pulse signal to region to be measured in the microwave signal generating unit 1
With microwave single-frequency coherent signal, the microwave signal receiving unit 2 receives microwave broadband pulse echo signal and microwave single-frequency is returned
Ripple signal.The microwave signal generating unit 1 includes microwave generator and microwave transmitting antenna, the microwave signal receiving unit
2 include microwave antenna, and microwave antenna includes microwave transmitting antenna and microwave antenna.Microwave signal generating unit 1 leads to
Cross microwave antenna and microwave broadband pulse signal, the focus in microwave broadband pulse signal irradiation imaging region occur to region to be measured
Region, on focal area surface scattering is produced, and the signal from focus surface scattering is received with several microwave antenna scannings.Microwave
Signal generating unit 1 is received simultaneously by microwave antenna to there is microwave single-frequency coherent signal, microwave antenna scanning to region to be measured
Record the microwave broadband pulse echo signal of position.Microwave transmitting antenna and microwave antenna can be same micro-
Wave antenna, is used alternatingly；Microwave transmitting antenna and microwave antenna can also be respectively different microwave antennas, carry out sending out respectively
Penetrate microwave signal and receive microwave echoes signal and use.Microwave signal generating unit is multiple, and microwave broadband pulse occurs respectively
Signal and microwave single-frequency coherent signal；Or microwave signal generating unit is one, alternately occur microwave broadband pulse signal and
Microwave single-frequency coherent signal.Microwave radar image-forming principle utilizes theory of SAR, using a miniature antenna as single spoke
Unit is penetrated, along a straight line the continuous motion scan in direction, some position transmission signals are selected in movement, receive corresponding transmitting position
The echo-signal put, storage receives the amplitude and phase place of signal.Microwave broadband pulse echo is received by microwave antenna record
The time of signal, you can calculate time delay, and microwave transmitting antenna is fixed with the distance of focus, therefore micro- transmitting antenna is obtained to disease
The distance of stove, so as to be accurately imaged.Microwave wave circuits and systems method, similar to computerized tomography, is a kind of electromagnetism
Reverse scattering image, by scattering object external observation to electromagnetic field come the electromagnetic signature parameter distribution in inversion imaging region, from
And judge the information such as the position of scattering object target, shape and size distribution.The microwave single-frequency echo-signal that will be received, according to electromagnetism
The position of characteristic parameter distribution and scattering object target, shape and size distributed intelligence generate tomoscan image.Described image is defeated
Go out unit 5 and the pixel of piece image in the radar detection image and the tomoscan image is mapped to into another piece image
In, make two width images reaches the fusion for unanimously completing the two width image related like vegetarian refreshments on locus.
Image co-registration includes various methods：A kind of method is labelling method, is swept in the radar detection image and the tomography
It is marked at the characteristic point of image in both tracing pictures, by the radar detection image and the image of the tomoscan image
Mark overlaps and the radar detection image and the tomoscan image is merged.By the radar detection image and described
The image tagged of tomoscan image is identified, and then identification image is carried out into image co-registration as boundary mark.Specific embodiment
In, image is optimized after being marked.Image tagged Software for Design into using the Feature point recognition of image as image close
Into boundary mark.Mark, lymph of the image tagged software according to the radar detection image and tomoscan image to tissue identification
The mark of other mark and characteristic is got to know, coincidence point is formed in reference axis, completed the radar detection image and break
The fusion of layer scan image, the method is equally applicable to the two dimension or three-dimensional breast image of other modes combination.It is right to further comprises
The display of multi-modal microwave breast image, shows the two and three dimensions information of breast, the mark to focal area.Another kind of method
For pixel weighted mean method, i.e.,：The image pixel of the radar detection image and the tomoscan image correspondence position is added
Weight average completes image co-registration.
Below by taking labelling method as an example：
Image registration
By using processing means such as matching, superpositions, the same target in multiple image is kept in the picture same
Position so as to the process with identical space coordinates.
In microwave tomoscan image is registering with microwave radar image, by metastable microwave tomoscan image
As reference picture I, using microwave radar image as floating image II, carry out matching somebody with somebody based on the image of the maximum mutual information method of pixel
It is accurate：
Rigid body translation includes transformation of scale, in two-dimensional image I I, point (x1, y1) through rigid transformation to point (x2, y2) should
It is with formula：
Wherein, α is the anglec of rotation, and K is scale parameter.
Mutual information relevance evaluation.Regard the gray value of two images subject to registration as two stochastic variables A and B respectively,
Scope 0 to 255, marginal probability distribution is respectively PA(a) and PBB (), joint probability distribution is PAB(a, b), then can obtain A with
The edge entropy of B and combination entropy are respectively：H (A), H (B) and H (A, B).Then have：
Normalized mutual information dependent evaluation function I (A, B) of stochastic variable A and B, be:
When two width reach optimal registration based on the image of common anatomical structure, the gray scale cross-correlation letter of their respective pixels
Breath value I (A, B) should reach maximum.
Registration optimization.After the completion of rigid body translation, need to further find a kind of similitude side degree to weigh the phase of two width images
Like degree, continuous transformation parameter α and K are needed so that similar side degree is optimal, and wherein scale parameter K excursions are arrived for 0
1, rotation angle range is 0 to 180 degree.
1. α and K transformation range collection are combined into the unit vector of reference axis：ci=e (i=1,2 ..., N)；
2. it is P to record initial value position vector0=(α0, K0)；
3. to i=1,2 ..., N, by Pi‐1Move to object function I (A, B) and prolong ciThe maximum position in direction, writes down this point
Pi；
4. to i=1,2 ..., N, by ci+1It is assigned to ci, juxtaposition cN=PN‐P0；
5. by PNObject function I (A, B) is moved in cNMaximum point on direction, and record the P of this point0；
6. 5. 2. repeat step arrive, until functional value I (A, B) no longer increases.
Preferred embodiment of the present utility model is：Also included carrying out Image semantic classification before image co-registration is carried out.
Microwave tomoscan image preprocess method is as follows：It is big by external interference factor based on microwave Tomography,
We carry out the extension of contrast using point processing to Image semantic classification, make image clearly, and feature is obvious, it is assumed that original image f (x,
Y) tonal range is [a, b], the tonal range of image g (x, y) after conversion it is linear extend to [c, d], then there is gray scale
Linear transformation expression formula is：
When the grey level distribution of most of pixel in image is in interval [a, b], fmaxFor the maximum gray scale of artwork, only
The gray level for having very small part has exceeded that this is interval, then in order to improve enhancing effect, Wo Menling
By the linear stretch to image, picture contrast effect can be effectively improved.
Microwave radar image pre-processing method is as follows：Because microwave radar is imaged the intrinsic problem speckle noise except existing
Outward, while also there is the random bright spot high-frequency noise for occurring, we are pre-processed using low pass Recursive filtering method to it.
Assume the grey decision-making x of each pixel in the n-th width microwave radar imagen(i, j) represents that α is coefficient correlation, then locate
Image y after reasonn(i, j) is
yn(i, j)=α * yn‐1(i, j)+(1- α) * xn(i, j) (4)
By formula (4) it is known that the value of current each pixel is solely dependent upon the defeated of the input of this pixel and last time
Go out, unrelated with the value of other pixels, we analyze its frequency characteristic by one-dimensional transform method, analyze each pixel
The frequency response of itself is put, that is, is had:
Y (n)=α * y (n-1)+(1- α) * x (n) (5)
Its transmission function is,
H (z)=Y (z)/X (z)=(1- α)/(1- α z‐1) (6)
In l-G simulation test, value α is 0.2,0.6 and 0.8 amplitude versus frequency characte, and α values are bigger, and radio-frequency component is repressed
It is more severe, weaken speckle noise more obvious.
Preferred embodiment of the present utility model is：The microwave antenna constitutes aerial array.Aerial array can be simultaneously
Meet the demand of microwave radar imaging and microwave Tomography, aerial array is integrally hemispherical steering towards in hemisphere
32 dual-mode antenna units of the heart.Aerial array is divided into transmitting and receiving unit, and alternating is arranged at equal intervals, a transmitting element pair
Two receiving units are answered, is staggeredly received and dispatched, microwave radar is continuously launched to measured target from microwave control unit control aerial array
Detectable signal, control mode is single pole multiple throw.Microwave control unit to microwave switch aerial array provides cline frequency ripple,
Operating frequency range is 1 to 30GHz.
Preferred embodiment of the present utility model is：There is microwave signal in the microwave signal generating unit 1, according to be measured
The shape in region, microwave signal antenna element 2 is arranged around region rotation sweep to be measured with rectilinear form, or with arc shape row
Row are around region rotation sweep to be measured.When region to be measured is three-dimensional, microwave signal antenna element 2 is around region rotation sweep to be measured；Treat
When survey region is planar, the region motion scan relatively to be measured of microwave signal antenna element 2.
Preferred embodiment of the present utility model is：Microwave signal antenna element 2 is in a spiral manner around breast area to be measured
Motion scan, when microwave signal antenna element 2 is scanned, scans in a spiral manner from top to bottom, and sweep radius is from small to large；Or
Person is scanned in a spiral manner from the bottom up, and sweep radius is from big to small.In specific embodiment, microwave signal antenna element 2 is from upper
Down it is scanned along hemisphere track in a spiral manner, sweep radius is ascending from top to bottom.Microwave signal antenna element from
Under be up scanned along hemisphere track in a spiral manner, sweep radius is descending from top to bottom.So scan track more to paste
Nearly udder shape, microwave signal is more accurate.The microwave signal antenna element includes microwave transmitting antenna and microwave antenna,
The microwave transmitting antenna and microwave antenna are fixedly installed side by side.The microwave signal antenna element 2 can be one,
Can be multiple.When the microwave signal antenna element is one, the microwave transmitting antenna and microwave antenna are chronologically
Alternate emission and reception；When the microwave signal antenna element is multiple, the microwave signal antenna element alternation successively,
The microwave transmitting antenna and microwave antenna in each described microwave signal antenna element 2 chronologically alternate emission and
Receive.
Preferred embodiment of the present utility model is：Multiple microwave signal antenna elements 2 are annular in shape around breast to be measured
Sector scanning, multiple microwave signal antenna elements 2 send and receive microwave signal, and the microwave imaging unit 7 is according to connecing
The microwave signal of receipts carries out microwave imaging to breast.
It is of the present utility model to have the technical effect that：A kind of multi-modal Apparatus of Microwave Imaging is built, by by the radar detection
The pixel of piece image is mapped in another piece image in image and the tomoscan image, make two width images related like
Vegetarian refreshments reaches the fusion for unanimously completing the two width image on locus.Can lead to during diagnosis earlier stage cancer patients
Cross and had complementary advantages using different image modes, microwave radar imaging obtains target scattering using ultra-wideband microwave signal
High-resolution of the center in distance, then using doppler information, obtains high-resolution of the scattering center in lateral separation,
Both combinations can obtain the two dimension or dimensional resolution of target, so that the multidigit high-resolution of target is achieved.Microwave
Tomography is that, by low power microwave directive testee, measured object produces a scattered field under the excitation of microwave, should
Scattered field is relevant with the complex dielectric permittivity distribution inside measured object, by the measurement to the scattering, obtains the relative of measured object
The distribution of dielectric constant and electrical conductivity, by carrying out after corresponding information processing obtain measured object internal object microwave tomography into
Picture.By both technology successful fusions in the utility model, a set of multi-mode microwave breast imaging system is constituted, reach imaging good and bad
Complementary purpose.
Above content is to combine specific preferred embodiment further detailed description of the utility model, it is impossible to
Identification is of the present utility model to be embodied as being confined to these explanations.For the ordinary skill of the utility model art
For personnel, without departing from the concept of the premise utility, some simple deduction or replace can also be made, all should be regarded
To belong to protection domain of the present utility model.
Claims (6)
1. a kind of multi-modal Apparatus of Microwave Imaging, it is characterised in that receive single including microwave signal generating unit, microwave signal
Unit, radar imagery unit, Tomography unit, image output unit, the microwave signal generating unit is to region to be measured
Generation microwave broadband pulse signal and microwave single-frequency coherent signal, the microwave signal receiving unit receives microwave broadband pulse and returns
Ripple signal and microwave single-frequency echo-signal, the radar imagery unit generates radar detection according to microwave broadband pulse echo signal
Image, the Tomography unit is according to microwave single-frequency echo signal form tomoscan image, and described image output is single
The radar detection image and the tomoscan image are carried out fusion output by unit.
2. multi-modal Apparatus of Microwave Imaging according to claim 1, it is characterised in that the microwave signal generating unit includes
There is module and microwave transmitting antenna in microwave, the microwave signal receiving unit includes microwave antenna.
3. multi-modal Apparatus of Microwave Imaging according to claim 2, it is characterised in that the microwave transmitting antenna and described micro-
Ripple reception antenna is same microwave antenna, the microwave transmitting antenna and the microwave antenna alternation.
4. multi-modal Apparatus of Microwave Imaging according to claim 2, it is characterised in that the microwave occurs module for multiple,
There is microwave broadband pulse signal and microwave single-frequency coherent signal respectively.
5. multi-modal Apparatus of Microwave Imaging according to claim 2, it is characterised in that it is that the microwave occurs module,
Alternately there is microwave broadband pulse signal and microwave single-frequency coherent signal.
6. multi-modal Apparatus of Microwave Imaging according to claim 2, it is characterised in that the microwave transmitting antenna and described micro-
Ripple reception antenna is arranged circlewise.
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| CN201521139611.0U CN206151437U (en) | 2015-12-31 | 2015-12-31 | Multimode microwave imaging device |
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| CN201521139611.0U CN206151437U (en) | 2015-12-31 | 2015-12-31 | Multimode microwave imaging device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109009107A (en) * | 2018-08-28 | 2018-12-18 | 深圳市体医疗科技有限公司 | A kind of breast imaging method and its system, computer readable storage medium |
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2015
- 2015-12-31 CN CN201521139611.0U patent/CN206151437U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109009107A (en) * | 2018-08-28 | 2018-12-18 | 深圳市体医疗科技有限公司 | A kind of breast imaging method and its system, computer readable storage medium |
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Address after: No.1 Workshop A601, MeiXun digital technology factory, No.19 Jinxiu Middle Road, Laokeng community, Longtian street, Pingshan District, Shenzhen, Guangdong 518000 Patentee after: SHENZHEN ET MEDICAL TECHNOLOGY CO.,LTD. Address before: 518000 clean Sunshine Park, Langshan Second Road, Nanshan District, Shenzhen, Guangdong Patentee before: SHENZHEN ET MEDICAL TECHNOLOGY CO.,LTD. |
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