CN215191756U - Annular array probe for photoacoustic imaging with array element frequency changing along with gradient - Google Patents
Annular array probe for photoacoustic imaging with array element frequency changing along with gradient Download PDFInfo
- Publication number
- CN215191756U CN215191756U CN202121520126.3U CN202121520126U CN215191756U CN 215191756 U CN215191756 U CN 215191756U CN 202121520126 U CN202121520126 U CN 202121520126U CN 215191756 U CN215191756 U CN 215191756U
- Authority
- CN
- China
- Prior art keywords
- electrode layer
- gradient
- array
- annular array
- array element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000003384 imaging method Methods 0.000 title claims abstract description 31
- 239000000523 sample Substances 0.000 title claims abstract description 26
- 239000013307 optical fiber Substances 0.000 claims abstract description 20
- 230000008859 change Effects 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract description 3
- 210000001519 tissue Anatomy 0.000 description 21
- 235000012431 wafers Nutrition 0.000 description 20
- 230000003287 optical effect Effects 0.000 description 7
- 230000006872 improvement Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 238000002604 ultrasonography Methods 0.000 description 3
- 230000001413 cellular effect Effects 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920006335 epoxy glue Polymers 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012634 optical imaging Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000012285 ultrasound imaging Methods 0.000 description 2
- 206010028980 Neoplasm Diseases 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 238000002405 diagnostic procedure Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 210000001035 gastrointestinal tract Anatomy 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 238000001755 magnetron sputter deposition Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
Abstract
The utility model discloses an annular array probe for photoacoustic imaging with array element frequency changing along with gradient, which comprises a shell, wherein a plurality of array elements with different frequencies are arranged in the shell, the array elements are distributed in concentric circles, and the center of the shell is provided with an optical fiber capable of continuously transmitting pulse signals; array element is including the piezoceramics piece, and the piezoceramics piece includes the piezoceramics layer, and electrode layer and bottom electrode layer have been plated respectively on the surface of piezoelectric layer, goes up the electrode layer and is connected with the connector through the lead wire with the bottom electrode layer, and the lower surface of piezoceramics piece is provided with the matching layer, and the upper surface of piezoceramics piece is provided with the back sheet, and the thickness of the piezoceramics piece of a plurality of array elements reduces from inside to outside gradually. The advantages are that: simple structure, reasonable, the ultrasonic head comprises the concentric circle distribution of array element of different frequencies, forms concentric receiving frequency gradient, can receive the reflection ultrasonic wave of different frequencies to increase the frequency bandwidth scope of ultrasonic wave, and then improve the imaging quality.
Description
Technical Field
The utility model belongs to the technical field of ultrasonic medical probe makes technique and specifically relates to an array element frequency is along with annular array probe for photoacoustic imaging of gradient change.
Background
In the field of medical image diagnosis, ultrasound imaging is a common diagnostic method. The ultrasonic imaging is based on the mechanical property of the detected biological tissue, the imaging contrast is low, and meanwhile, the traditional ultrasonic imaging depends on the acoustic impedance change of the biological tissue, and only interface reflection imaging can be realized, and chromatographic imaging cannot be realized.
While the advantage of optical methods lies in its functionality and sensitivity, currently, the interaction of light with tissue is mainly due to both absorption and scattering: wherein the optical absorption property of the tissue is related to the tissue components, and the component change of the tissue can reflect the change of the biochemical state of the tissue body, so that the biochemical state of the tissue body can be judged according to the optical absorption property; light scattering in biological tissues results from random variations in refractive index at the micrometer scale, while the physiological basis for fluctuations in refractive index at the micrometer scale is the variation of biological tissues from one another at the cellular and subcellular levels, so it is believed that changes in morphology of tissue bodies at the cellular and subcellular levels can be inferred from optical scattering properties. In summary, the optical properties of the tissue volume (scattering and absorption) have the ability to assess the biochemical and morphological state of the focal tissue. In addition, the optical properties are sensitive to the above changes occurring in the tissue, which makes it possible to have high image contrast in optical imaging. Therefore, the characteristics of the functionality and the sensitivity of the optical technology can be utilized to quantitatively evaluate the functions of the tissues.
However, light irradiation of biological tissue exhibits strong scattering properties, typically with a scattering coefficient of about 100cm-1, which makes optical imaging impossible with both resolution and imaging depth.
Unlike light propagating in tissue, which exhibits strong scattering, ultrasound scatters 2-3 orders of magnitude less in tissue than light, meaning that ultrasound imaging techniques can somehow be compatible in terms of resolution and imaging depth. However, the source of the graph contrast of the ultrasonic imaging technology is the difference of biological tissues in mechanical properties, the imaging contrast is low, and the ultrasound depends on the acoustic impedance change of the tissues, can only realize interface reflection imaging, cannot realize tomography, is not suitable for the examination of gas-containing organs (such as lung, digestive tract and bones), and also limits the ultrasonic imaging technology in the aspect of early cancer diagnosis; in addition, ultrasound technology does not have the ability to assess tissue body function.
SUMMERY OF THE UTILITY MODEL
The utility model aims at remedying the above-mentioned not enough, to the society disclose simple structure, reasonable array element frequency along with gradient change's annular array probe for the optoacoustic imaging, its different frequency array elements through annular arrangement receive the reflection ultrasonic wave of different frequencies, increase the frequency bandwidth scope of ultrasonic wave, improve the imaging quality.
The technical scheme of the utility model is realized like this:
an annular array probe for photoacoustic imaging with array element frequency changing along with gradient comprises a shell, wherein a plurality of array elements with different frequencies are arranged in the shell, the array elements are distributed in concentric circles, and an optical fiber capable of continuously transmitting pulse signals is arranged in the center of the shell; the array element comprises a piezoelectric wafer, the piezoelectric wafer comprises a piezoelectric layer, the surface of the piezoelectric layer is plated with an upper electrode layer and a lower electrode layer respectively, the upper electrode layer and the lower electrode layer are connected with a connector through leads, the lower surface of the piezoelectric wafer is provided with a matching layer, the upper surface of the piezoelectric wafer is provided with a back lining layer, and the thickness of the piezoelectric wafers of the array elements is gradually reduced from inside to outside.
The measures for further optimizing the technical scheme are as follows:
as an improvement, the array elements are in a circular ring structure.
As an improvement, the connector is provided with a positive terminal and a negative terminal, the upper electrode layer is connected with the positive terminal through a lead, and the lower electrode layer is connected with the negative terminal through a lead.
As an improvement, the center of the shell is provided with an optical fiber threading pipe, and the optical fiber is threaded in the optical fiber threading pipe.
As an improvement, the lead adopts a high-shielding coaxial cable.
As an improvement, the piezoelectric wafer is a piezoelectric ceramic composite wafer.
As an improvement, the number of the array elements is 2 to 8.
Compared with the prior art, the utility model the advantage be:
the utility model discloses an array element frequency is along with annular array probe for photoacoustic imaging of gradient change, simple structure, reasonable, it is by optic fibre continuously emission pulse signal, and the ultrasonic head that constitutes through a plurality of array elements that are concentric circles distribution receives the reflected signal, and the ultrasonic head comprises the array element concentric circles distribution of different frequencies, forms concentric received frequency gradient, can receive the reflection ultrasonic wave of different frequencies to increase the frequency bandwidth scope of ultrasonic wave, and then improve the imaging quality.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic sectional structure diagram of the present invention.
The utility model discloses each reference numeral's name is in the drawing:
the device comprises a shell 1, an array element 2, a piezoelectric layer 21a, an upper electrode layer 21b, a lower electrode layer 21c, a matching layer 22, a backing layer 23, an optical fiber 3, an optical fiber threading tube 31, a connector 4, a positive terminal 4a, a negative terminal 4b and a lead 41.
Detailed Description
The present invention is described in further detail below with reference to the attached drawings:
as shown in fig. 1 and 2, an annular array probe for photoacoustic imaging, in which the frequency of array elements changes with the gradient, comprises a housing 1, wherein a plurality of array elements 2 with different frequencies are arranged in the housing 1, the array elements 2 are distributed in concentric circles, and an optical fiber 3 capable of continuously transmitting pulse signals is arranged in the center of the housing 1; the array element 2 comprises a piezoelectric wafer, the piezoelectric wafer comprises a piezoelectric layer 21a, the surface of the piezoelectric layer 21a is plated with an upper electrode layer 21b and a lower electrode layer 21c respectively, the upper electrode layer 21b and the lower electrode layer 21c are connected with the connector 4 through a lead 41, the lower surface of the piezoelectric wafer is provided with a matching layer 22, the upper surface of the piezoelectric wafer is provided with a backing layer 23, and the thickness of the piezoelectric wafers of the array elements 2 is gradually reduced from inside to outside.
The array element 2 is in a circular ring structure.
The connector 4 is provided with a positive terminal 4a and a negative terminal 4b, the upper electrode layer 21b is connected with the positive terminal 4a through a lead 41, and the lower electrode layer 21c is connected with the negative terminal 4b through the lead 41.
The center of the shell 1 is provided with an optical fiber threading pipe 31, and the optical fiber 3 is threaded in the optical fiber threading pipe 31. The optical fiber threading pipe 31 is arranged to facilitate installation of the optical fiber 3, and can also play a certain protection role on the optical fiber 3.
The lead 41 is a high-shielding coaxial cable.
The piezoelectric wafer is a piezoelectric ceramic composite wafer.
The number of the array elements 2 is 2 to 8. In this embodiment, the number of array elements 2 is 3.
The piezoelectric wafers have different thicknesses and are matched with the matching layer 22 and the back lining layer 23 with different thicknesses; the matching layer 22 is prepared by using polymers and fillers according to different filling ratios, the backing material of the backing layer 23 is a composite material with high acoustic impedance and high acoustic attenuation containing air holes, for example, tungsten powder with high filling ratio is filled in epoxy resin to prepare the backing, and in order to improve the acoustic attenuation coefficient, the flexibility of the base material is properly increased (namely, modified treatment is carried out, for example, the method of adding polysulfide rubber is adopted).
The utility model discloses a probe manufacturing method:
the piezoelectric layer 21a is made of composite material piezoelectric ceramic pieces with different thicknesses through a magnetron sputtering process, and the upper surface and the lower surface are respectively plated with an upper electrode layer 21b and a lower electrode layer 21c to make piezoelectric wafers with different diameter circular structures. Then, the matching layer 22 is formed on the lower surface of the piezoelectric wafer by mixing and curing epoxy glue and inorganic powder, and the backing layer 23 is formed on the upper surface of the piezoelectric wafer by curing epoxy glue, thus forming the array element 2 in a laminated structure. Due to the different thicknesses of the piezoelectric wafer and the matching layer 22 in each array element 2, the frequency of the reflected ultrasonic wave that can be received by each array element will also be different. Nest one by one and bond array element 2 of different diameters according to piezoelectric wafer's thickness gradient distribution (thickness reduces from inside to outside gradually), the last electrode layer 21b of each array element 2 is connected with connector 4's positive terminal 4a through lead wire 41, lower electrode layer 21c is connected with connector 4's negative terminal 4b through lead wire 41, connector 4 passes through cable junction external imaging equipment, the ultrasonic head of cylindrical structure is so made, set up optic fibre threading pipe 31 at the center of ultrasonic head, wear to put optic fibre 3 in the optic fibre threading pipe 31, at last wholly encapsulate in shell 1, make the probe.
When the probe is used, the optical fiber 3 continuously transmits pulse signals, the array elements 2 receive reflected ultrasonic waves with different frequencies, the probe forms a frequency gradient in concentric distribution, the frequency bandwidth range of the ultrasonic waves can be increased, and the imaging quality is improved.
The above is only a preferred embodiment of the present invention, and not intended to limit the scope of the invention, and it should be appreciated by those skilled in the art that various equivalent substitutions and obvious changes made in the specification and drawings should be included within the scope of the present invention.
Claims (7)
1. The utility model provides an array element frequency is along with annular array probe for photoacoustic imaging of gradient change, includes shell (1), characterized by: a plurality of array elements (2) with different frequencies are arranged in the shell (1), the array elements (2) are distributed in concentric circles, and an optical fiber (3) capable of continuously transmitting pulse signals is arranged in the center of the shell (1); the array element (2) comprises a piezoelectric wafer, the piezoelectric wafer comprises a piezoelectric layer (21a), the surface of the piezoelectric layer (21a) is plated with an upper electrode layer (21b) and a lower electrode layer (21c) respectively, the upper electrode layer (21b) and the lower electrode layer (21c) are connected with the connector (4) through leads (41), the lower surface of the piezoelectric wafer is provided with a matching layer (22), the upper surface of the piezoelectric wafer is provided with a backing layer (23), and the thickness of the piezoelectric wafer of the array elements (2) is gradually reduced from inside to outside.
2. The annular array probe for photoacoustic imaging of claim 1, wherein the array element frequency varies with the gradient, and the annular array probe comprises: the array elements (2) are in a circular ring structure.
3. The annular array probe for photoacoustic imaging of claim 2, wherein the array element frequency varies with the gradient, and the annular array probe comprises: the connector (4) is provided with a positive terminal (4a) and a negative terminal (4b), the upper electrode layer (21b) is connected with the positive terminal (4a) through a lead (41), and the lower electrode layer (21c) is connected with the negative terminal (4b) through the lead (41).
4. The annular array probe for photoacoustic imaging of claim 3, wherein the array element frequency varies with the gradient, and the annular array probe comprises: the optical fiber cable is characterized in that an optical fiber cable tube (31) is arranged in the center of the shell (1), and the optical fiber (3) penetrates through the optical fiber cable tube (31).
5. The annular array probe for photoacoustic imaging of claim 4, wherein the array element frequency varies with the gradient, and the annular array probe comprises: the lead (41) adopts a high-shielding coaxial cable.
6. The annular array probe for photoacoustic imaging of claim 5, wherein the array element frequency varies with the gradient, and the annular array probe comprises: the piezoelectric wafer is a piezoelectric ceramic composite wafer.
7. The annular array probe for photoacoustic imaging of claim 6, wherein the array element frequency varies with the gradient, and the annular array probe comprises: the number of the array elements (2) is 2-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121520126.3U CN215191756U (en) | 2021-07-06 | 2021-07-06 | Annular array probe for photoacoustic imaging with array element frequency changing along with gradient |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121520126.3U CN215191756U (en) | 2021-07-06 | 2021-07-06 | Annular array probe for photoacoustic imaging with array element frequency changing along with gradient |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215191756U true CN215191756U (en) | 2021-12-17 |
Family
ID=79429797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121520126.3U Active CN215191756U (en) | 2021-07-06 | 2021-07-06 | Annular array probe for photoacoustic imaging with array element frequency changing along with gradient |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215191756U (en) |
-
2021
- 2021-07-06 CN CN202121520126.3U patent/CN215191756U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2021227261A1 (en) | Flexible ultrasonic probe, ultrasonic imaging measurement system, and measurement method | |
| US10663436B2 (en) | Acoustic-wave acquisition apparatus | |
| US10165948B2 (en) | Ultrasonic probe and inspection apparatus equipped with the ultrasonic probe | |
| EP2328480B1 (en) | Low-cost device for c-scan photoacoustic imaging | |
| JP5546111B2 (en) | Ultrasonic probe and inspection apparatus provided with the ultrasonic probe | |
| CN101912250B (en) | Intravascular photoacoustic and ultrasonic double-mode imaging endoscope device and imaging method thereof | |
| CN105769128A (en) | Integrated opto-acoustic, ultrasonic and opto-acoustic elastic endoscopic imaging device and method thereof | |
| CN112272540A (en) | Quantitative imaging system and use thereof | |
| CN105105791B (en) | A kind of intravascular ultrasound focus method, focused diagnostic instrument and focused transducer | |
| CN105903667A (en) | Dual-frequency hollow focused ultrasonic detector | |
| CN102670242A (en) | Ultrasonic focusing transducer | |
| CN212083324U (en) | Flexible ultrasonic probe and ultrasonic imaging detection system | |
| CN204995443U (en) | A optoacoustic integration probe for breast cancer detection | |
| CN117157012A (en) | Optical ultrasonic integrated endoscope probe based on transparent ultrasonic sensor, endoscope equipment and catheter equipment | |
| CN215191756U (en) | Annular array probe for photoacoustic imaging with array element frequency changing along with gradient | |
| CN117426797B (en) | Dual-frequency ultrasonic transducer and ultrasonic endoscope probe | |
| CN215656207U (en) | Photoacoustic imaging array probe device adopting helmet type shape array arrangement mode | |
| CN215191757U (en) | Linear array probe for photoacoustic imaging with array element frequency changing along with gradient | |
| CN214965872U (en) | Cylindrical annular composite array photoacoustic imaging probe spliced by different frequencies | |
| CN113477495A (en) | Dual-frequency long-focus deep ultrasonic transducer based on stack arrangement | |
| CN116531025A (en) | Modulation-enhanced conformal heart wearable ultrasonic probe and diagnostic equipment | |
| JP3462904B2 (en) | Needle-shaped ultrasonic probe | |
| CN113640392A (en) | High-sensitivity full-transparent photoacoustic detector based on transparent flexible composite electrode and endoscopic device | |
| CN215030805U (en) | Rotatable thereby realize concave array probe unit of head-mounted array effect | |
| JP6548405B2 (en) | phantom |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231007 Address after: 055450 North Section Road West, Gongxing Street, Baixiang County, Xingtai City, Hebei Province Patentee after: HEBEI AOSUO ELECTRONIC TECHNOLOGY CO.,LTD. Address before: Room 112, building 4, area a, 925 Yecheng Road, Jiading Industrial Zone, Jiading District, Shanghai, 201821 Patentee before: Aosheng (Shanghai) Electronic Technology Co.,Ltd. |
|
| TR01 | Transfer of patent right |