JPH05261094A - Position detector of intracranial aneurysm - Google Patents

Position detector of intracranial aneurysm

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Publication number
JPH05261094A
JPH05261094A JP6305992A JP6305992A JPH05261094A JP H05261094 A JPH05261094 A JP H05261094A JP 6305992 A JP6305992 A JP 6305992A JP 6305992 A JP6305992 A JP 6305992A JP H05261094 A JPH05261094 A JP H05261094A
Authority
JP
Japan
Prior art keywords
aneurysm
sound
rotating
detecting
sensors
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
Application number
JP6305992A
Other languages
Japanese (ja)
Inventor
Shinichi Kondo
真一 近藤
Keiko Kushida
恵子 櫛田
Shizuo Ishikawa
静夫 石川
Hiroshi Kanda
浩 神田
Hiroyuki Miyagi
宏行 宮城
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP6305992A priority Critical patent/JPH05261094A/en
Publication of JPH05261094A publication Critical patent/JPH05261094A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To determine the three-dimensional position of the intracranial aneurysm by a method of detecting the sensor rotating angle at which the signal of an aneurysm turbulence sound is maximized by using plural narrow directional acoustic sensors and detecting the position where the turbulence sound of the aneurysm is generated from the relations between the rotating angles and the positions of the respective sensors CONSTITUTION:The two directional acoustic sensors 11R, 11L for detecting the sound waves generated on the inner side of the skull 20 respectively via the positions of the two eyes of the testee body and biaxial rotating means 14R, 14L thereof are disposed in a sensor module 10. A heart beat synchronizing signal CP is applied to a rotating angle control means 6 for controlling the rotating angle and is scanned at every one set of the rotating angles per heart beat of the testee body. The aneurysm turbulence signals received by the two sensors are converted to digital signals. The spectral frequencies of the turbulence sound are determined by frequency analyzing means 4R, 4L and, thereafter, the rotating angle to give the spectral value of the max. turbulence sound is read out. The three-dimensional position of the aneurysm 22 is calculated from this angle and the distance between the rotating centers of the two sensors.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、くも膜下出血の予防診
断として、頭蓋脳内動脈瘤の位置を検出する装置に関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting the position of a cranial intracerebral aneurysm as a preventive diagnosis of subarachnoid hemorrhage.

【0002】[0002]

【従来の技術】従来から、動脈瘤や血管の奇形部におい
て、血流の乱流による雑音が発生することが知られてい
る。従来の頭蓋内動脈瘤乱流音の検出に関する技術とし
ては、例えば、「日本音響学会誌38巻10号(198
2)、pp657−662」や「医用電子と生体工学第
28巻特別号(1990)、pp77」に記載されたよ
うに、頭蓋骨や眼球に直接音響センサを装着し、図4に
示すような動脈瘤乱流音信号や、図5に示すような動脈
瘤乱流音スペクトルを得ている。また、眼球から頭蓋内
動脈瘤乱流音を検出した方がS/Nのよい信号が得られ
ることが知られている。
2. Description of the Related Art It has been conventionally known that noise is generated by turbulent blood flow in an aneurysm or a deformed portion of a blood vessel. As a conventional technique for detecting the turbulent sound of intracranial aneurysm, for example, “Journal of the Acoustical Society of Japan, Vol. 38, No. 10 (198)
2), pp. 657-662 "and" Medical Electronics and Biotechnology Vol. 28 Special Issue (1990), pp77 ", an acoustic sensor is directly attached to the skull or eyeball, and an artery as shown in FIG. The aneurysm turbulent sound signal and the aneurysm turbulent sound spectrum as shown in FIG. 5 are obtained. Further, it is known that a signal having a good S / N can be obtained by detecting the intracranial aneurysm turbulent sound from the eyeball.

【0003】[0003]

【発明が解決しようとする課題】前記従来技術では、広
指向性の単一、または複数の音響センサを用い、動脈瘤
乱流音だけを検出していたため、頭蓋内動脈瘤の有無の
み検出可能であるが、動脈瘤の位置を決定することは困
難であった。
In the above-mentioned prior art, since a wide directivity single or multiple acoustic sensor is used to detect only aneurysm turbulent sound, it is possible to detect only the presence or absence of an intracranial aneurysm. However, it was difficult to determine the location of the aneurysm.

【0004】本発明は上記事情に鑑みてなされたもの
で、その目的とするところは、頭蓋内動脈瘤の3次元位
置を決定することにある。
The present invention has been made in view of the above circumstances, and an object thereof is to determine the three-dimensional position of an intracranial aneurysm.

【0005】[0005]

【課題を解決するための手段】本発明の上記目的は、頭
部、又は両眼に装着する複数個の狭指向性音響センサ
と、その音響センサを2軸回転する回転手段と、回転角
制御手段と、乱流音スペクトルのピークを検出する手段
と、動脈瘤乱流音発生位置を計算する演算手段と、動脈
瘤位置を2次元、または3次元表示し、かつその3次元
座標値を表示する表示手段とからなることを特徴とする
頭蓋内動脈瘤位置検出装置によって達成される。
The above object of the present invention is to provide a plurality of narrow directional acoustic sensors to be worn on the head or both eyes, rotating means for rotating the acoustic sensors biaxially, and rotation angle control. Means, a means for detecting the peak of the turbulent sound spectrum, a computing means for calculating the aneurysm turbulent sound generation position, a two-dimensional or three-dimensional display of the aneurysm position, and the three-dimensional coordinate values thereof. It is achieved by an intracranial aneurysm position detecting device comprising:

【0006】[0006]

【作用】本発明において、頭部、又は両眼に装着された
複数個の狭指向性音響センサは、回転手段によりそれぞ
れ独立に2軸回転走査しながら頭蓋内で発生する音を受
信する。複数個の狭指向性音響センサからの受信信号
は、それぞれ乱流音スペクトルのピーク検出手段により
各回転角に対する乱流音スペクトルのピークパワーが検
出され、そのピークパワーが最大となる2軸回転角をそ
れぞれ動脈瘤位置演算手段に入力する。動脈瘤位置演算
手段では、乱流音スペクトルのピークパワーが最大とな
る2軸回転角と複数の音響センサの回転中心の距離とか
ら、動脈瘤の3次元位置を計算し、表示手段に出力す
る。
In the present invention, the plurality of narrow directional acoustic sensors mounted on the head or both eyes receive the sound generated in the skull while independently rotating the biaxially by the rotating means. The peak power of the turbulent sound spectrum of each received signal from the plurality of narrow directional acoustic sensors is detected by the peak detector of the turbulent sound spectrum, and the biaxial rotation angle at which the peak power is maximum. Are input to the aneurysm position calculation means. The aneurysm position calculation means calculates the three-dimensional position of the aneurysm from the biaxial rotation angle at which the peak power of the turbulent sound spectrum is maximum and the distances of the rotation centers of the plurality of acoustic sensors, and outputs the calculated three-dimensional position to the display means. ..

【0007】[0007]

【実施例】以下、本発明の実施例を図面に基づいて詳細
に説明する。
Embodiments of the present invention will now be described in detail with reference to the drawings.

【0008】図1は、本発明による頭蓋内動脈瘤位置検
出装置の構成を示すブロック図である。センサ・モジュ
ール10には被検体の両目の位置を介してそれぞれ頭蓋
20の内側で発生する音波を検出するための2つの指向
性音響センサ11R、11Lと、それぞれの音響センサ
を独立に2軸(X軸、Y軸)回りに回転して頭蓋骨内を
走査するための2軸回転手段14R、14Lを含む。2
軸回転手段14Rの回転角θX1、θY1(右目用)、
及び回転手段14Lの回転角θX2、θY2(左目用)
は回転角制御手段6により制御される。回転角制御手段
6には被検体に装着された心電計等から抽出される心拍
同期信号CPが与えられ、被検体の1心拍に対し1組の
回転角づつ走査する。2つのセンサで受信した動脈瘤乱
流信号は、それぞれの増幅器1R、1Lで増幅され、乱
流音周波数帯域(例えば、100〜2000Hz)を通
過させるためのフィルタリング手段2L、2Rにより不
要雑音を除去した後、A/D変換器3R、3Lによりデ
ジタル信号に変換される。デジタル化された乱流信号
は、周波数分析手段4R、4Lに入力され、心拍同期の
時間ゲートにより不要反射信号を除去すると共に、各心
拍ごとに乱流音のスペクトル周波数を求める。スペクト
ルピーク検出手段5R、5Lでは、4R、4Lで求めた
乱流音スペクトルから各回転角に対する乱流音スペクト
ルのピーク値を求めると共に、全走査回転角に対するピ
ーク値を比較し、最大乱流音スペクトルピーク値を与え
る回転角θX1、θY1、θX2、θY2を指定するた
めの信号P1、P2を動脈瘤位置演算手段7に出力す
る。動脈瘤位置演算手段7では、P1、P2に対する回
転角θX1、θY1、θX2、θY2を回転角制御手段
6より読み出し、別に入力されている2つのセンサの回
転中心間距離Dとから、下記の演算式(数4)〜(数
6)に従い、動脈瘤22の3次元位置(x、y、z)を
計算する。表示手段8では、動脈瘤の3次元座標値
(x、y、z)から動脈瘤位置を2次元、または3次元
表示し、かつその3次元座標値を表示する。
FIG. 1 is a block diagram showing the configuration of an intracranial aneurysm position detecting device according to the present invention. The sensor module 10 includes two directional acoustic sensors 11R and 11L for detecting sound waves generated inside the skull 20 through the positions of both eyes of the subject, and each acoustic sensor independently of two axes ( It includes biaxial rotation means 14R, 14L for rotating around the (X axis, Y axis) to scan inside the skull. Two
The rotation angles θX1 and θY1 (for the right eye) of the shaft rotating means 14R,
And rotation angles θX2 and θY2 (for the left eye) of the rotating means 14L
Is controlled by the rotation angle control means 6. The rotation angle control means 6 is supplied with a heartbeat synchronizing signal CP extracted from an electrocardiograph or the like attached to the subject, and scans one set of rotation angles for one heartbeat of the subject. The aneurysm turbulence signals received by the two sensors are amplified by the respective amplifiers 1R, 1L, and unnecessary noise is removed by the filtering means 2L, 2R for passing the turbulent sound frequency band (for example, 100 to 2000 Hz). After that, it is converted into a digital signal by the A / D converters 3R and 3L. The digitized turbulent flow signal is input to the frequency analysis means 4R, 4L, the unnecessary reflection signal is removed by the time gate synchronized with the heartbeat, and the spectral frequency of the turbulent sound is obtained for each heartbeat. In the spectrum peak detecting means 5R and 5L, the peak value of the turbulent sound spectrum for each rotation angle is obtained from the turbulent sound spectrum obtained in 4R and 4L, and the peak values for all scanning rotation angles are compared to obtain the maximum turbulent sound. The signals P1 and P2 for designating the rotation angles θX1, θY1, θX2, and θY2 that give the spectrum peak value are output to the aneurysm position calculating means 7. The aneurysm position calculation means 7 reads the rotation angles θX1, θY1, θX2, θY2 with respect to P1 and P2 from the rotation angle control means 6, and calculates the following from the separately input distance D between the rotation centers of the two sensors. The three-dimensional position (x, y, z) of the aneurysm 22 is calculated according to the equations (Equation 4) to (Equation 6). The display unit 8 displays the aneurysm position two-dimensionally or three-dimensionally from the three-dimensional coordinate values (x, y, z) of the aneurysm, and also displays the three-dimensional coordinate values.

【0009】本実施例において、A/D変換器3R、3
Lからのデジタル信号と回転角は、パソコンなどのコン
ピュータ内部のメモリに実時間で取り込んだ後、周波数
分析手段4R、4Lやスペクトルピーク検出手段5R、
5Lや動脈瘤位置演算手段7の処理をオフラインで計算
することも可能である。
In the present embodiment, the A / D converters 3R, 3
The digital signal from L and the rotation angle are fetched in a memory inside a computer such as a personal computer in real time, and then frequency analyzing means 4R, 4L and spectrum peak detecting means 5R,
It is also possible to calculate the processing of 5L and the aneurysm position calculating means 7 off-line.

【0010】図2は、本実施例のセンサ・モジュール1
0の構成を示す図である。狭指向性音響センサ11R、
11Lとしては、狭指向性マイクロホンか、広指向性マ
イクロホンと音響レンズを組み合わせたものが用いられ
る。狭指向性音響センサは、音響媒体(例えば、空気や
水やオイル)を封入したハウジング12R、12Lの中
ににそれぞれ配置される。ハウジング12R、12Lの
前面は、例えばシリコンゴム膜など、音響透過性が良
く、フレキシブルで薄い音響マッチング膜13R、13
L、で形成されている。但し、空気を音響媒体とする場
合は、音響マッチング膜は不要である。被検者のまぶた
を閉じた状態でセンサ・モジュール10を装着する。こ
のとき、被検者の両眼のまぶたと音響マッチング膜13
R、13Lとが接触部するようにする。このため、2つ
のハウジング間の距離は、両眼間距離の個人差に対応し
て可変移動できるように構成されている。2軸回転手段
14Rは音響センサ11Rの向きをY軸の周りに回転す
るパルスモータと、X軸(図面に垂直方向)の周りに回
転するパルスモータとから成る。図では前者のみが現わ
れている。音響センサ11Lの向きを回転する2軸回転
手段14Lも同様な構成である。
FIG. 2 shows the sensor module 1 of this embodiment.
It is a figure which shows the structure of 0. Narrow directional acoustic sensor 11R,
As 11L, a narrow directional microphone or a combination of a wide directional microphone and an acoustic lens is used. The narrow directivity acoustic sensors are respectively arranged in housings 12R and 12L in which an acoustic medium (for example, air, water or oil) is enclosed. The front surfaces of the housings 12R and 12L are, for example, silicone rubber films, which have good acoustic transparency, and are flexible and thin acoustic matching films 13R and 13L.
It is formed by L. However, when air is used as the acoustic medium, the acoustic matching film is unnecessary. The sensor module 10 is attached with the subject's eyelids closed. At this time, the eyelids of both eyes of the subject and the acoustic matching film 13
The R and 13L are in contact with each other. Therefore, the distance between the two housings is configured to be variable according to the individual difference in the interocular distance. The biaxial rotation means 14R is composed of a pulse motor that rotates the acoustic sensor 11R around the Y axis and a pulse motor that rotates around the X axis (the direction perpendicular to the drawing). Only the former appears in the figure. The biaxial rotation means 14L that rotates the orientation of the acoustic sensor 11L has the same configuration.

【0011】図3は、実施例における動脈瘤位置測定の
座標系を示している。右目の音響センサの回転中心を
R、左目の音響センサの回転中心をLとし、RとLの距
離をDとする。動脈瘤位置Wの3次元座標を(x、y、
z)として、Y軸の回転角θY(=θY1=θY2)、
X軸の回転角θX1、θX2のときに動脈瘤乱流音スペ
クトルの最大値が得られたとする。図3から明らかなよ
うに、動脈瘤位置(x、y、z)と回転角θY、θX
1、θX2には、次式の関係がある。
FIG. 3 shows a coordinate system for measuring aneurysm position in the embodiment. Let R be the rotation center of the right-eye acoustic sensor, L be the rotation center of the left-eye acoustic sensor, and D be the distance between R and L. The three-dimensional coordinates of the aneurysm position W are (x, y,
z) is the rotation angle θY of the Y axis (= θY1 = θY2),
It is assumed that the maximum value of the aneurysm turbulent sound spectrum is obtained at the rotation angles θX1 and θX2 of the X axis. As is clear from FIG. 3, the aneurysm position (x, y, z) and the rotation angles θY, θX
1 and θX2 have the following relationship.

【0012】 x/z=tanθY (数1) y/√(x2+z2)=tanθX1 (数2) (D−y)/√(x2+z2)=tanθX2 (数3) (数1)、(数2)、(数3)よりx、y、zについて解くと、 x=DsinθY/(tanθX1+tanθX2) (数4) y=DtanθX1/(tanθX1+tanθX2) (数5) z=DcosθY/(tanθX1+tanθX2) (数6) となる。従って、音響センサの回転中心距離Dと音響セ
ンサ回転角θX1、θY1、θX2、θY2から、動脈
瘤位置演算手段7によって(数4)、(数5)、(数
6)を計算することにより動脈瘤位置を求めることがで
きる。
X / z = tan θY (Equation 1) y / √ (x 2 + z 2 ) = tan θX 1 (Equation 2) (D−y) / √ (x 2 + z 2 ) = tan θX 2 (Equation 3) (Equation 1) Solving x, y, and z from (Equation 2) and (Equation 3), x = DsinθY / (tanθX1 + tanθX2) (Equation 4) y = DtanθX1 / (tanθX1 + tanθX2) (Equation 5) z = DcosθY / (tanθX1 + tanθX2) Equation 6) is obtained. Therefore, the aneurysm position calculation means 7 calculates (Equation 4), (Equation 5), (Equation 6) from the rotation center distance D of the acoustic sensor and the acoustic sensor rotation angles θX1, θY1, θX2, and θY2, and thereby the artery. The bump location can be determined.

【0013】本実施例を頭部の複数センサに適用する場
合、各センサの乱流音受信方向を表す3次元直線に対す
る最小自乗近接点として動脈瘤位置(x、y、z)を求
めればよい。
When the present embodiment is applied to a plurality of head sensors, the aneurysm position (x, y, z) may be obtained as the least square proximity point to the three-dimensional straight line representing the turbulent sound reception direction of each sensor. ..

【0014】[0014]

【発明の効果】以上、詳細に説明した如く、本発明によ
れば、頭蓋内動脈瘤の3次元位置を決定することができ
る。
As described above in detail, according to the present invention, the three-dimensional position of an intracranial aneurysm can be determined.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明による頭蓋内動脈瘤位置検出装置の構成
を示すブロック図である。
FIG. 1 is a block diagram showing the configuration of an intracranial aneurysm position detection device according to the present invention.

【図2】本発明によるセンサの構成例を示す図である。FIG. 2 is a diagram showing a configuration example of a sensor according to the present invention.

【図3】本発明の構成における動脈瘤位置測定の座標系
を示す図である。
FIG. 3 is a diagram showing a coordinate system for measuring aneurysm position in the configuration of the present invention.

【図4】動脈瘤乱流音信号の実測例を示す図である。FIG. 4 is a diagram showing an actual measurement example of an aneurysm turbulent sound signal.

【図5】動脈瘤乱流音スペクトルの実測例を示す図であ
る。
FIG. 5 is a diagram showing an actual measurement example of an aneurysm turbulent sound spectrum.

【符号の説明】[Explanation of symbols]

1R,1L…増幅器、2R,2L…フィルタリング手
段、3R,3L…A/D変換器、4R,4L…周波数分
析手段、5R,5L…スペクトルピーク検出手段、6…
回転角制御手段、7…動脈瘤位置演算手段、8…表示手
段、11R,11L…狭指向性音響センサ、14R,1
4L…2軸回転手段。
1R, 1L ... Amplifier, 2R, 2L ... Filtering means, 3R, 3L ... A / D converter, 4R, 4L ... Frequency analysis means, 5R, 5L ... Spectral peak detection means, 6 ...
Rotation angle control means, 7 ... Aneurysm position calculation means, 8 ... Display means, 11R, 11L ... Narrow directional acoustic sensor, 14R, 1
4L ... Biaxial rotation means.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 神田 浩 東京都国分寺市東恋ケ窪1丁目280番地 株式会社日立製作所中央研究所内 (72)発明者 宮城 宏行 東京都国分寺市東恋ケ窪1丁目280番地 株式会社日立製作所中央研究所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Kanda 1-280 Higashi Koikekubo, Kokubunji City, Tokyo Central Research Laboratory, Hitachi, Ltd. (72) Hiroyuki Miyagi 1-280 Higashi Koikekubo, Kokubunji, Tokyo Hitachi Ltd. Central research institute

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】頭蓋内で発生する動脈瘤の血流乱流音を受
音するための複数の狭指向性音響センサを用い、前記複
数センサの受信音方向をそれぞれ3次元的に走査する2
軸回転手段により、動脈瘤乱流音の信号が最大となるセ
ンサ回転角をそれぞれ検出し、その回転角と各センサの
位置関係から動脈瘤乱流音発生位置を検出することを特
徴とする頭蓋内動脈瘤位置検出装置。
1. A plurality of narrow directional acoustic sensors for receiving turbulent blood flow noise of an aneurysm generated in the skull, and three-dimensionally scan the reception sound directions of the plurality of sensors.
A skull characterized by detecting the sensor rotation angle at which the signal of the aneurysm turbulent sound is maximized by the axial rotation means, and detecting the aneurysm turbulent sound generation position from the positional relationship between the rotation angle and each sensor. Internal aneurysm position detection device.
【請求項2】眼球を介して受音するための2つの狭指向
性音響センサと、前記2つの音響センサをそれぞれ2軸
回転するための回転手段と、前記回転手段の回転角を制
御するための回転角制御手段と、前記2つの音響センサ
からの受音信号を増幅するための増幅器と、受音信号か
ら乱流音周波数帯域を通過させるためのフィルタリング
手段と、前記フィルタリング手段出力をサンプリングす
るA/D変換器と、前記A/D変換器出力を周波数分析
する手段と、前記周波数分析手段出力から乱流音スペク
トルのピークを検出する手段と、前記スペクトルピーク
の最大値を与える音響センサ回転角から動脈瘤乱流音発
生位置を計算する演算手段と、前記動脈瘤位置を2次
元、または3次元表示し、かつその3次元座標値を表示
する表示手段とを具備したことを特徴とする頭蓋内動脈
瘤位置検出装置。
2. Two narrow directivity acoustic sensors for receiving sound through an eyeball, rotating means for rotating each of the two acoustic sensors biaxially, and controlling a rotation angle of the rotating means. Rotation angle control means, an amplifier for amplifying the sound reception signals from the two acoustic sensors, a filtering means for passing a turbulent sound frequency band from the sound reception signals, and sampling of the filtering means output. A / D converter, means for frequency-analyzing the output of the A / D converter, means for detecting a peak of a turbulent sound spectrum from the output of the frequency analysis means, and rotation of an acoustic sensor for giving the maximum value of the spectrum peak. Computation means for calculating the aneurysm turbulent sound generation position from the angle, and display means for displaying the aneurysm position two-dimensionally or three-dimensionally and displaying the three-dimensional coordinate values thereof. Intracranial aneurysms position detecting device, characterized in that the.
JP6305992A 1992-03-19 1992-03-19 Position detector of intracranial aneurysm Pending JPH05261094A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6305992A JPH05261094A (en) 1992-03-19 1992-03-19 Position detector of intracranial aneurysm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6305992A JPH05261094A (en) 1992-03-19 1992-03-19 Position detector of intracranial aneurysm

Publications (1)

Publication Number Publication Date
JPH05261094A true JPH05261094A (en) 1993-10-12

Family

ID=13218398

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6305992A Pending JPH05261094A (en) 1992-03-19 1992-03-19 Position detector of intracranial aneurysm

Country Status (1)

Country Link
JP (1) JPH05261094A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014013816A1 (en) * 2012-07-17 2014-01-23 古野電気株式会社 Ultrasound measurement instrument and ultrasound measurement device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014013816A1 (en) * 2012-07-17 2014-01-23 古野電気株式会社 Ultrasound measurement instrument and ultrasound measurement device
US20150190117A1 (en) * 2012-07-17 2015-07-09 Furuno Electric Co., Ltd. Ultrasound measurement instrument and ultrasound measurement device
JP5840780B2 (en) * 2012-07-17 2016-01-06 古野電気株式会社 Ultrasonic measuring instrument and ultrasonic measuring device

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