JPH0155430B2 - - Google Patents
Info
- Publication number
- JPH0155430B2 JPH0155430B2 JP57022862A JP2286282A JPH0155430B2 JP H0155430 B2 JPH0155430 B2 JP H0155430B2 JP 57022862 A JP57022862 A JP 57022862A JP 2286282 A JP2286282 A JP 2286282A JP H0155430 B2 JPH0155430 B2 JP H0155430B2
- Authority
- JP
- Japan
- Prior art keywords
- elements
- ultrasonic
- controlling
- array
- present
- 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.)
- Expired
Links
- 238000002604 ultrasonography Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000003384 imaging method Methods 0.000 description 2
- 238000012285 ultrasound imaging Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- RDYMFSUJUZBWLH-UHFFFAOYSA-N endosulfan Chemical compound C12COS(=O)OCC2C2(Cl)C(Cl)=C(Cl)C1(Cl)C2(Cl)Cl RDYMFSUJUZBWLH-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/18—Methods or devices for transmitting, conducting or directing sound
- G10K11/26—Sound-focusing or directing, e.g. scanning
- G10K11/32—Sound-focusing or directing, e.g. scanning characterised by the shape of the source
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Description
【発明の詳細な説明】
本発明は配列振動子を用いた超音波装置に係
り、特に電子走査形超音波撮像装置の高性能化に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ultrasonic device using an array of transducers, and particularly to improving the performance of an electronic scanning ultrasonic imaging device.
従来の電子走査形超音波撮像装置においては、
配列素子の位相を制御して超音波ビームを収束さ
せている。このとき、収束領域（焦域）の近距離
領域および遠距離領域では、収束しない場合に比
較してかえつて超音波ビーム幅は悪化する。そこ
で、近距離音場を改善させる目的で配列素子数を
制御する、いわゆる可変開口方式が採用されてい
る。しかし、従来技術では遠距離音場の悪化に対
する改善策がなされていなかつた。 In conventional electronic scanning ultrasound imaging devices,
The ultrasonic beam is focused by controlling the phase of the array elements. At this time, the ultrasonic beam width worsens in the near and far ranges of the convergence region (focal region) compared to the case where there is no convergence. Therefore, a so-called variable aperture method has been adopted in which the number of array elements is controlled in order to improve the near-field sound field. However, in the prior art, no measures have been taken to improve the deterioration of the far-field sound field.
本発明の目的は配列素子の個数を制御すること
により、全域にわたり良好な超音波ビームを得る
ことにある。 An object of the present invention is to obtain a good ultrasonic beam over the entire area by controlling the number of array elements.
かかる目的を達成するために本発明は配列素子
の位相を制御して超音波ビームを収束させる電子
走査形超音波撮像装置において、配列素子数を制
御することにより近距離および遠距離音場を改善
せんとするものである。 In order to achieve such an object, the present invention improves near-field and far-field sound fields by controlling the number of array elements in an electronic scanning ultrasound imaging device that converges an ultrasound beam by controlling the phase of array elements. This is what I am trying to do.
以下本発明を図面により説明する。 The present invention will be explained below with reference to the drawings.
第１図は本発明の一実施例の構成を示す図であ
る。図において、＃１，＃２，…，＃１６は配列
素子、２０は上記配列素子を選択する切換器、２
１は上記切換器２０を制御するための制御信号発
生器、２２は送波ドライバ、２３は受波整相器、
２４は表示器である。制御信号発生器２１が選択
する配列素子数の１例を第２図に示す。すなわ
ち、深度が増加するにつれて、選択する素子数を
増加させ、特定領域（焦域）より遠距離では逆に
素子数を減少させる。 FIG. 1 is a diagram showing the configuration of an embodiment of the present invention. In the figure, #1, #2,..., #16 are array elements, 20 is a switch for selecting the array elements, 2
1 is a control signal generator for controlling the switching device 20, 22 is a transmitting driver, 23 is a receiving phaser,
24 is a display. An example of the number of array elements selected by the control signal generator 21 is shown in FIG. That is, as the depth increases, the number of elements to be selected is increased, and conversely, the number of elements is decreased at a distance farther than a specific area (focal area).
超音波ビーム幅の具体例を第３図に示す。ここ
で、○・印は受波口径Ｄが16mm、超音波周波数が
3.5MHz、配列素子ピツチが１mm、素子数が16個
かつ固定収束点が75mmの場合の−20dB超音波受
波ビーム幅であり、□・印は、本発明により素子数
を選択した場合の超音波受波ビーム幅である。こ
のときの深度に対する素子数は第２図と同一であ
る。 A specific example of the ultrasonic beam width is shown in FIG. Here, the ○ mark indicates that the receiving aperture D is 16 mm and the ultrasonic frequency is
-20dB ultrasonic receiving beam width at 3.5MHz, array element pitch 1mm, number of elements 16, and fixed convergence point 75mm. This is the sound wave receiving beam width. The number of elements relative to the depth at this time is the same as in FIG. 2.
このように固定収束の焦域（６〜10cm）の前後
の近距離および遠距離音場の超音波ビーム幅が著
るしく改善されていることが明らかである。 It is thus clear that the near and far field ultrasound beam widths before and after the fixed convergence focal region (6-10 cm) are significantly improved.
このとき、送波口径16mm、収束点75mmとすれば
送波ビーム幅は第２図の〇印と同一となる。した
がつて送受ビームは、〇印と□印のビームの積と
なる。 At this time, if the transmitting aperture is 16 mm and the convergence point is 75 mm, the transmitting beam width will be the same as the circle mark in Figure 2. Therefore, the transmitting and receiving beam is the product of the beams marked ○ and □.
このようにして、送受とも固定収束の場合、受
波口径を焦域の前後で制御することにより、撮像
速度を下げずに分解能を改善できる点に特徴があ
る。したがつて、心臓などを対象としたセクタス
キヤン、あるいはリニアスキヤンに有効である。 In this way, in the case of fixed convergence for both transmission and reception, the feature is that by controlling the receiving aperture before and after the focal region, the resolution can be improved without reducing the imaging speed. Therefore, it is effective for sector scan or linear scan targeting the heart.
以上の説明では一次元配列振動子について説明
したが、２次元配列振動子についても同様な効果
が期待できる。 In the above explanation, a one-dimensional array of vibrators has been described, but similar effects can be expected with a two-dimensional array of vibrators.
第１図は本発明の一実施例の構成を示すブロツ
ク図、第２図はその動作を説明する図、第３図は
本発明によるビーム幅の改善を示す曲線図であ
る。
FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a diagram explaining its operation, and FIG. 3 is a curve diagram showing the improvement in beam width according to the present invention.
Claims (1)
することにより超音波ビームを特定深度領域に収
束させる超音波装置において、前記特定収束領域
の前後の深度に対しては特定収束領域に対して用
いた素子数より少ない数の素子を選択する手段を
備えたことを特徴とする超音波送受波器。1. In an ultrasonic device that focuses an ultrasound beam on a specific depth region by controlling the phase of transmission and/or reception of an array element, An ultrasonic transducer characterized by comprising means for selecting a smaller number of elements than the number of elements used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2286282A JPS58140657A (en) | 1982-02-17 | 1982-02-17 | Ultrasonic-wave transmitter and receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2286282A JPS58140657A (en) | 1982-02-17 | 1982-02-17 | Ultrasonic-wave transmitter and receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58140657A JPS58140657A (en) | 1983-08-20 |
| JPH0155430B2 true JPH0155430B2 (en) | 1989-11-24 |
Family
ID=12094515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2286282A Granted JPS58140657A (en) | 1982-02-17 | 1982-02-17 | Ultrasonic-wave transmitter and receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58140657A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6052782A (en) * | 1983-08-31 | 1985-03-26 | Yokogawa Medical Syst Ltd | Azimuth adaptive type phased array sonar |
| JP7124505B2 (en) * | 2018-07-13 | 2022-08-24 | コニカミノルタ株式会社 | Ultrasonic signal processing device, ultrasonic diagnostic device, and ultrasonic signal processing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5517639A (en) * | 1978-07-22 | 1980-02-07 | Hitachi Ltd | Single fuel injection device |
| JPS55101253A (en) * | 1979-01-30 | 1980-08-01 | Tokyo Shibaura Electric Co | Ultrasonic scanning apparatus |
| JPS55149889A (en) * | 1979-05-11 | 1980-11-21 | Toshiba Corp | Ultrasonic wave receiver |
-
1982
- 1982-02-17 JP JP2286282A patent/JPS58140657A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5517639A (en) * | 1978-07-22 | 1980-02-07 | Hitachi Ltd | Single fuel injection device |
| JPS55101253A (en) * | 1979-01-30 | 1980-08-01 | Tokyo Shibaura Electric Co | Ultrasonic scanning apparatus |
| JPS55149889A (en) * | 1979-05-11 | 1980-11-21 | Toshiba Corp | Ultrasonic wave receiver |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58140657A (en) | 1983-08-20 |
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