JPH0199543A - Ultrasonic probe - Google Patents
Ultrasonic probeInfo
- Publication number
- JPH0199543A JPH0199543A JP25887487A JP25887487A JPH0199543A JP H0199543 A JPH0199543 A JP H0199543A JP 25887487 A JP25887487 A JP 25887487A JP 25887487 A JP25887487 A JP 25887487A JP H0199543 A JPH0199543 A JP H0199543A
- Authority
- JP
- Japan
- Prior art keywords
- electroacoustic transducer
- receiving
- transmitting
- cable
- transmission
- 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.)
- Pending
Links
- 239000000523 sample Substances 0.000 title claims description 10
- 238000002604 ultrasonography Methods 0.000 claims description 12
- 230000002463 transducing effect Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 7
- 239000008280 blood Substances 0.000 abstract description 2
- 210000004369 blood Anatomy 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000003745 diagnosis Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000017531 blood circulation Effects 0.000 description 2
- 235000012012 Paullinia yoco Nutrition 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、超音波診断装置に用いられ、ドツプラー効果
を利用して人体内の血統情報を得るようにしたドツプラ
ー診断用の超音波プローブに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an ultrasound probe for Doppler diagnosis, which is used in an ultrasound diagnostic device and uses the Doppler effect to obtain blood lineage information within the human body. be.
従来の技術
近年、超音波診断装置の発展に伴い、ドツプラー効果を
利用したドツプラー診断用の超音波プローブが盛んに利
用されるようになってきた。従来、このドツプラー診断
用の超音波プローブは、筺体の前側部に送信用電気音響
変換素子と受信用電気音響変換素子を別々に設け、送信
用電気音響変換素子に連続的に駆動電圧を印加し、超電
波を被検体に放射し、血流速によるドツプラー効果によ
り偏位した受信信号を連続的に受信用電気音響変換素子
により受信することにより超音波診断装置本体のデイス
プレィ上に断層像を表示することができ、このような超
音波プローグをＣＷドツプラプローブと称している。BACKGROUND OF THE INVENTION In recent years, with the development of ultrasonic diagnostic equipment, ultrasonic probes for Doppler diagnosis that utilize the Doppler effect have come into widespread use. Conventionally, this ultrasound probe for Doppler diagnosis has separately provided a transmitting electroacoustic transducer element and a receiving electroacoustic transducer element on the front side of the housing, and a driving voltage is continuously applied to the transmitting electroacoustic transducer element. , displays a tomographic image on the display of the ultrasound diagnostic equipment by emitting ultrasound waves to the subject and continuously receiving received signals that are deviated due to the Doppler effect caused by blood flow velocity using a receiving electroacoustic transducer. Such an ultrasonic probe is called a CW Doppler probe.
発明が解決しようとする問題点
しかし、上記のような従来例の構成では、送信用電気音
響変換素子と受信用電気音響変換素子のいずれにおいて
も、それらを構成している圧電体の電気音響変換効率に
のみ注目し、送信用電気音響変換素子には高い送信電圧
を印加し、受信感度をできるだけ大きくするようにして
いた。したがって、ケーブルを含めた変換効率が悪いと
いう問題があった。Problems to be Solved by the Invention However, in the configuration of the conventional example as described above, in both the transmitting electroacoustic transducer element and the receiving electroacoustic transducer element, the electroacoustic transducer of the piezoelectric body that constitutes them is Focusing only on efficiency, a high transmitting voltage was applied to the transmitting electroacoustic transducer to maximize receiving sensitivity. Therefore, there was a problem that the conversion efficiency including the cable was poor.
本発明は、上記のような従来技術の問題を解決するもの
で、送信用電気音響変換素子に低い駆動電圧を印加して
も受信用電気音響変換素子で微小信号を効率よく受信す
ることができるようにした超音波プローブを提供するこ
とを目的とするものである。The present invention solves the problems of the prior art as described above, and allows the receiving electroacoustic transducer to efficiently receive minute signals even when a low drive voltage is applied to the transmitting electroacoustic transducer. An object of the present invention is to provide an ultrasonic probe as described above.
問題点を解決するための手段
本発明は、上記目的を達成するため、筺体の前側部に送
信用と受信用の電気音響変換素子が設けられ、上記送信
用電気音響変換素子に送信用のケーブルおよびコイルが
接続され、超音波診断装置本体との接続側の端子から送
信用電気音響変換素子側を見た電気的特性が直列共振特
性を有するように構成され、上記受信用電気音響変換素
子に受信用のケーブルおよびコイルが接続され、超音波
診断装置本体と゛の接続側の端子から受信用電気音響変
換素子側を見た電気的特性が並列共振特性を有するよう
に構成されたものである。Means for Solving the Problems In order to achieve the above object, the present invention includes an electroacoustic transducer for transmitting and receiving on the front side of the housing, and a transmitting cable is connected to the electroacoustic transducer for transmitting. and a coil are connected to each other, and the electrical characteristics as viewed from the terminal on the connection side with the ultrasound diagnostic apparatus body to the transmitting electroacoustic transducer side have a series resonance characteristic, and the receiving electroacoustic transducing element has a series resonance characteristic. A receiving cable and a coil are connected, and the electrical characteristics of the receiving electroacoustic transducer element when viewed from the connection side terminal of the ultrasonic diagnostic apparatus main body are configured to have parallel resonance characteristics.
作 用 上記技術的手段による作用は次のようになる。For production The effects of the above technical means are as follows.
すなわち、送信用電気音響変換素子側においては、超音
波診断装置本体との接続側の端子から見た電気的特性が
直列共振特性を有するように構成され、電圧共振回路と
等しいので、最大の電圧が供給され、受信用電気音響変
換素子側においては、超音波診断装置本体との接続側の
端子から見た電気的特性が電流共振回路と等しいので、
信号が共振特性で効率よく受信される。In other words, on the transmitting electroacoustic transducer side, the electrical characteristics viewed from the terminal on the connection side with the ultrasound diagnostic equipment main body are configured to have series resonance characteristics, and are equal to the voltage resonant circuit, so the maximum voltage is supplied, and on the receiving electroacoustic transducer side, the electrical characteristics seen from the terminal on the side connected to the ultrasound diagnostic equipment main body are equal to those of the current resonant circuit.
Signals are efficiently received with resonance characteristics.
実施例
以下、本発明の実施例について図面を参照しながら説明
する。図は本発明の一実施例における超音波プローブを
示す概略断面図である。EXAMPLES Hereinafter, examples of the present invention will be described with reference to the drawings. The figure is a schematic cross-sectional view showing an ultrasonic probe in one embodiment of the present invention.
図においては、１は筺体、２と３は筺体１の前面側の両
側部に設けられた送信用の受信用の電気音響変換素子で
、送信用電気音響変換素子２は圧電板４の前面と背面に
電極５と６が設けられ、受信用電気音響変換素子３は同
様に圧電板７の前面と背面に電極８と９が設けられてい
る。１０は一つの背面負荷材で、この背面負荷材１０の
前面に上記送信用と受信用の電気音響変換素子２と３が
接着などにより取り付けられている。１１は送信用電気
音響変換素子２の電極５と６に接続された送信用ケーブ
ル、１２は受信用電気音響変換素子３の電極８と９に接
続された受信用ケーブル、１３は送信用ケーブル１１
に接続された送信用コイル１４ と受信用ケーブル１
２に接続された受信用コイル１５を納めたコネクタ部で
ある。上記送信用電気音響変換素子２においては、圧電
板４の誘電容量Ｃ１と送信ケーブル１１ の有する誘電
容量Ｃ２および送信ケーブル１１に接続された送信用コ
イル１４の透導容量Ｌ１とが共振周波数ｆｌに対し、下
記の（１）式で表わされるような圧電板４が用いられる
。In the figure, 1 is a housing, 2 and 3 are electroacoustic transducers for transmitting and receiving provided on both sides of the front side of the housing 1, and electroacoustic transducing element 2 for transmitting is provided on the front side of a piezoelectric plate 4. Electrodes 5 and 6 are provided on the back surface, and electrodes 8 and 9 are similarly provided on the front and back surfaces of the piezoelectric plate 7 of the electroacoustic transducer element 3 for reception. Reference numeral 10 denotes one back loading material, and the electroacoustic transducer elements 2 and 3 for transmission and reception are attached to the front surface of this back loading material 10 by adhesive or the like. 11 is a transmission cable connected to electrodes 5 and 6 of the transmission electroacoustic conversion element 2; 12 is a reception cable connected to electrodes 8 and 9 of the reception electroacoustic conversion element 3; 13 is a transmission cable 11
Transmitting coil 14 and receiving cable 1 connected to
This is a connector section that houses a receiving coil 15 connected to 2. In the transmitting electroacoustic transducer 2, the dielectric capacitance C1 of the piezoelectric plate 4, the dielectric capacitance C2 of the transmitting cable 11, and the transmissive capacitance L1 of the transmitting coil 14 connected to the transmitting cable 11 reach the resonance frequency fl. On the other hand, a piezoelectric plate 4 as expressed by the following equation (1) is used.
一方、受信用電気音響変換素子３においては、圧電板７
の誘電容量Ｃ３と受信ケーブル１２の有する誘電容量Ｃ
４および受信ケーブル１２に接続された受信用コイル１
５ の透導容量Ｌ２ とが反共振周波数ｆ３に対し、下
記の（２）式で表わされるような圧電板７が用いられる
。On the other hand, in the receiving electroacoustic transducer 3, the piezoelectric plate 7
The dielectric capacitance C3 of the receiving cable 12 and the dielectric capacitance C of the receiving cable 12
4 and the receiving coil 1 connected to the receiving cable 12
A piezoelectric plate 7 having a conductive capacitance L2 of 5 and an anti-resonant frequency f3 expressed by the following equation (2) is used.
したがって、送信用電気音響変換素子２側では、超音波
診断装置本体（図示省略）側に接続される端子１６ａ、
１６ｂから送信用電気音響変換素子２側を見た電気特性
が直列共振特性を有するように構成され、受信用電気音
響変換素子３側では、超音波診断装置本体側に接続され
る端子１７ａ、 １７ｂから受信用電気音響変換素子
３側を見た電気特性が並列共振特性を有するように構成
されている。Therefore, on the transmitting electroacoustic transducer 2 side, the terminal 16a connected to the ultrasound diagnostic apparatus main body (not shown),
The electrical characteristics viewed from the transmitting electroacoustic transducer 2 side from the receiving electroacoustic transducing element 3 side are configured such that they have series resonance characteristics, and on the receiving electroacoustic transducing element 3 side, terminals 17a and 17b are connected to the ultrasound diagnostic apparatus main body side. The electrical characteristics viewed from the side toward the receiving electroacoustic transducer 3 side are configured to have parallel resonance characteristics.
このように送信用電気音響変換素子２側においては、送
信信号周波数が「１のとき、直列共振回路であるので、
電圧共振回路と等しくなり、最大の電圧が供給されるこ
とになる。一方、受信用電気音響変換素子３側において
は、並列共振特性であるので、電流共振回路と等しくな
り、信号が共振特性で効率よく受信されることになる。In this way, on the transmission electroacoustic transducer 2 side, when the transmission signal frequency is 1, it is a series resonant circuit, so
The voltage will be equal to the resonant circuit, and the maximum voltage will be supplied. On the other hand, on the receiving electroacoustic transducer 3 side, since it has a parallel resonance characteristic, it becomes equal to a current resonance circuit, and the signal is efficiently received with the resonance characteristic.
また、上記圧電板４はその共振周波数ｒ２が共振周波数
ｒ１に対し、ｆ２＝ｆｚとなるように設定されたものが
用いられ、圧電板７はその共振周波数「４が反共振周波
数ｆ３に対し、 ｆ４＝ｆ３となるように設定されたも
のが用いられることにより、駆動電圧から超音波信号へ
、また超音波エコー信号から電気信号への変換効率が最
大限に得られる。Further, the piezoelectric plate 4 is set such that its resonant frequency r2 is set to f2=fz with respect to the resonant frequency r1, and the piezoelectric plate 7 is set such that its resonant frequency r2 is set to be f2=fz with respect to the anti-resonant frequency f3. By using one set such that f4=f3, the conversion efficiency from the driving voltage to the ultrasonic signal and from the ultrasonic echo signal to the electric signal can be maximized.
次に上記実施例の動作について説明する。Next, the operation of the above embodiment will be explained.
送信用電気音響変換素子２にコイ・フタ部１３および送
信ケーブル１１等を介して駆動電圧を連続的に印加し、
圧電板４を励起することにより、超音波を被検体に放射
し、血流速によるドツプラー効果により偏位した受信信
号を連続的に受信用電気音響変換素子３により受信する
ことにより受信ケーブル１２およびコネクタ部１３等を
介して超音波診断装置本体のデイスプレィ上に断層像を
表示することができる。このとき、上記のように送信用
電気音響変換素子２側においては電圧共振回路と等しく
、最大の電圧が供給され、受信用電気音響変換素子３側
においては電流共振回路と等しく、信号が共振特性で効
率よく受信される。したがって、低い駆動電圧で微小信
号を効率よく受信することができる。A driving voltage is continuously applied to the transmitting electroacoustic transducer 2 via the coil lid part 13, the transmitting cable 11, etc.,
By exciting the piezoelectric plate 4, ultrasonic waves are emitted to the subject, and the receiving electroacoustic transducer 3 continuously receives the received signal, which has been deviated due to the Doppler effect due to blood flow velocity, thereby transmitting the receiving cable 12 and A tomographic image can be displayed on the display of the ultrasound diagnostic apparatus main body via the connector section 13 and the like. At this time, as described above, the transmitting electroacoustic transducer 2 side is equal to the voltage resonant circuit, and the maximum voltage is supplied, and the receiving electroacoustic transducer 3 side is equal to the current resonant circuit, and the signal has resonance characteristics. received efficiently. Therefore, small signals can be efficiently received with a low driving voltage.
なお、送信用と受信用の電気音響変換素子２と３の前面
には必要に応じて音響整合層等を備えてもよい。Note that an acoustic matching layer or the like may be provided on the front surfaces of the electroacoustic transducers 2 and 3 for transmission and reception, if necessary.
発明の効果
以上述べたように本発明によれば、筺体の前側部に設け
た送信用と受信用の電気音響変換素子にそれぞれ送信用
と受信用のケーブルおよびコイルを接続し、超音波診断
装置本体との接続側の端子から送信用と受信用の電気音
響変換素子側を見た電気的特性がそれぞれ直列共振特性
と並列共振特性を有するように構成しているので、送信
用電気音響変換素子側では、電圧共振回路と等しくなり
、最大の電圧が供給され、受信用電気音響変換素子側で
は、電流共振回路と等しくなり、信号が共振特性で効率
よく受信される。したがって、送信用電気音響変換素子
に低い駆動電圧を印加しても受信用電気音響変換素子で
微小信号を効率よく受信することができる。Effects of the Invention As described above, according to the present invention, transmitting and receiving cables and coils are connected to the transmitting and receiving electroacoustic transducers provided on the front side of the casing, respectively, and an ultrasonic diagnostic apparatus is manufactured. The electrical characteristics of the transmitting and receiving electroacoustic transducers when viewed from the terminal on the connection side with the main body are configured to have series resonance characteristics and parallel resonance characteristics, respectively, so that the transmitting electroacoustic transducer On the side, the voltage is equal to the resonant circuit, and the maximum voltage is supplied, and on the receiving electroacoustic transducer side, it is equal to the current resonant circuit, and the signal is efficiently received with resonance characteristics. Therefore, even if a low drive voltage is applied to the transmitting electroacoustic transducer, the receiving electroacoustic transducer can efficiently receive a minute signal.
図は本発明の一実施例における超音波プローブを示す一
部概略断面図である。
１・・・筺体、２・・送信用電気音響変換素子、３・・
・受信用電気音響変換素子、４・・・圧電板、５．６・
・・電極、７・・・圧電板、８．９・電極、１０・・・
背面負荷材、１１ 送信用ケーブル、１２・ 受信
用ケーブル、１３・・・コイ・フタ部、１４・・・送信
用コイル、１５・＝受信用コイル、１６ａ、 １６ｂ
、 １７ａ、 ］、７ｂ−・・端子。
代理人の氏名 弁理士 中 尾 敏 男 はか１名ｔｖ
ズ沢預）The figure is a partially schematic sectional view showing an ultrasonic probe in one embodiment of the present invention. 1... Housing, 2... Electro-acoustic conversion element for transmission, 3...
・Electroacoustic transducer for reception, 4...piezoelectric plate, 5.6・
...Electrode, 7...Piezoelectric plate, 8.9.Electrode, 10...
Rear load material, 11 Transmission cable, 12 Receiving cable, 13 Coil lid part, 14 Transmitting coil, 15 Receiving coil, 16a, 16b
, 17a, ], 7b-...terminal. Name of agent: Patent attorney Toshio Nakao
Zuzawa Yoko)
Claims (1)
設けられ、上記送信用電気音響変換素子に送信用のケー
ブルおよびコイルが接続され、超音波診断装置本体との
接続側の端子から送信用電気音響変換素子側を見た電気
的特性が直列共振特性を有するように構成され、上記受
信用電気音響変換素子に受信用のケーブルおよびコイル
が接続され、超音波診断装置本体との接続側の端子から
受信用電気音響変換素子側を見た電気的特性が並列共振
特性を有するように構成されたことを特徴とする超音波
プローブ。Electroacoustic transducer elements for transmitting and receiving are provided on the front side of the housing, and a cable and coil for transmitting are connected to the electroacoustic transducing element for transmitting. The electric characteristics viewed from the side of the reliable electroacoustic transducer element are configured to have series resonance characteristics, and a receiving cable and coil are connected to the receiving electroacoustic transducer element, and the connecting side with the ultrasound diagnostic apparatus main body. An ultrasonic probe characterized in that its electrical characteristics when viewed from the terminal of the receiving electroacoustic transducer side have parallel resonance characteristics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25887487A JPH0199543A (en) | 1987-10-14 | 1987-10-14 | Ultrasonic probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25887487A JPH0199543A (en) | 1987-10-14 | 1987-10-14 | Ultrasonic probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0199543A true JPH0199543A (en) | 1989-04-18 |
Family
ID=17326243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25887487A Pending JPH0199543A (en) | 1987-10-14 | 1987-10-14 | Ultrasonic probe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0199543A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05146435A (en) * | 1991-11-29 | 1993-06-15 | Matsushita Electric Ind Co Ltd | Ultrasonic probe connector |
| FR2720165A1 (en) * | 1994-05-17 | 1995-11-24 | Valeo Electronique | Ultrasonic movement detector for car interior alarm |
| FR2720164A1 (en) * | 1994-05-17 | 1995-11-24 | Valeo Electronique | Movement detector for car interior alarm |
| GB2385454A (en) * | 2002-02-15 | 2003-08-20 | Jpm Internat Ltd | Gambling machine |
| CN103479396A (en) * | 2013-10-11 | 2014-01-01 | 王卫东 | Detecting device for velocity of blood flow |
-
1987
- 1987-10-14 JP JP25887487A patent/JPH0199543A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05146435A (en) * | 1991-11-29 | 1993-06-15 | Matsushita Electric Ind Co Ltd | Ultrasonic probe connector |
| FR2720165A1 (en) * | 1994-05-17 | 1995-11-24 | Valeo Electronique | Ultrasonic movement detector for car interior alarm |
| FR2720164A1 (en) * | 1994-05-17 | 1995-11-24 | Valeo Electronique | Movement detector for car interior alarm |
| GB2385454A (en) * | 2002-02-15 | 2003-08-20 | Jpm Internat Ltd | Gambling machine |
| CN103479396A (en) * | 2013-10-11 | 2014-01-01 | 王卫东 | Detecting device for velocity of blood flow |
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