JP2956534B2 - Ultrasound Doppler blood flow meter - Google Patents
Ultrasound Doppler blood flow meterInfo
- Publication number
- JP2956534B2 JP2956534B2 JP13766195A JP13766195A JP2956534B2 JP 2956534 B2 JP2956534 B2 JP 2956534B2 JP 13766195 A JP13766195 A JP 13766195A JP 13766195 A JP13766195 A JP 13766195A JP 2956534 B2 JP2956534 B2 JP 2956534B2
- Authority
- JP
- Japan
- Prior art keywords
- blood flow
- trace
- flow velocity
- frequency analyzer
- information
- 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 - Fee Related
Links
Landscapes
- Ultra Sonic Daignosis Equipment (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、生体中の血流速度を測
定する超音波ドプラ血流計に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic Doppler blood flow meter for measuring a blood flow velocity in a living body.
【０００２】[0002]
【従来の技術】生体循環器等の超音波診断において盛ん
に利用されている超音波ドプラ血流測定では、最高血流
速度等を自動的に算出してトレースする機能が各種診断
において盛んに行われている。このとき、スペクトラム
上のノイズ成分が高い場合等において正確なトレースを
得るためには、ゲイン等の各種パラメータを微妙に調整
する必要があった。2. Description of the Related Art In ultrasonic Doppler blood flow measurement, which is widely used in ultrasonic diagnostics of living body circulatory organs, etc., a function of automatically calculating the maximum blood flow velocity and the like and tracing is actively performed in various diagnostics. Have been done. At this time, various parameters such as gain had to be finely adjusted in order to obtain an accurate trace when the noise component on the spectrum was high.
【０００３】以下に従来例の基本原理を図４を用いて説
明する。図４において、１は超音波振動子を通じて被検
体からの反射超音波を受信して電気信号に変換する超音
波探触子、２は超音波探触子１の超音波振動子に駆動パ
ルスを供給する送信走査回路、３は超音波探触子１の超
音波振動子からの受信信号の増幅等を行なう受信処理回
路、４は超音波を送受することによって生体中から得ら
れたエコー信号を直交検波する直交検波手段、５は直交
検波信号を周波数分析する周波数分析器、６は周波数分
析器５からのドプラスペクトラムを走査変換するＤＳＣ
部、７はトレース情報をドプラスペクトラムと合成する
トレース合成手段、８はドプラスペクトラム情報から最
高血流速度等を演算するしきい値処理を含むトレース演
算手段、９はトレース演算手段８において算出された情
報を時間的に掃引してトレース描画するトレース描画手
段、１０はドプラスペクトラムと血流速度を示すトレー
スを表示する表示部である。The basic principle of the conventional example will be described below with reference to FIG. In FIG. 4, reference numeral 1 denotes an ultrasonic probe which receives reflected ultrasonic waves from a subject through an ultrasonic transducer and converts the reflected ultrasonic waves into an electric signal, and 2 denotes a drive pulse to the ultrasonic transducer of the ultrasonic probe 1. A transmission scanning circuit for supplying the signal, a reception processing circuit for amplifying a reception signal from the ultrasonic transducer of the ultrasonic probe 1, and the like, and an echo signal obtained from inside the living body by transmitting and receiving the ultrasonic wave. A quadrature detection means for quadrature detection, 5 a frequency analyzer for frequency analysis of the quadrature detection signal, 6 a DSC for scan-converting the Doppler spectrum from the frequency analyzer 5
And 7, a trace synthesizing means for synthesizing the trace information with the Doppler spectrum, 8 a trace calculating means including a threshold processing for calculating the maximum blood flow velocity and the like from the Doppler spectrum information, and 9 a calculating means in the trace calculating means A trace drawing means 10 for sweeping information temporally to draw a trace is a display unit for displaying a Doppler spectrum and a trace indicating a blood flow velocity.
【０００４】以上の構成において、以下にその動作につ
いて説明する。送信走査回路２が発生した駆動パルス
は、超音波探触子１の超音波振動子に加えられ、超音波
に変換されて被検体に送波される。被検体からの反射超
音波は、超音波探触子１の超音波振動子によって電気信
号に変換され、受信処理回路３に送られる。受信信号
は、受信処理回路３において処理した後、直交検波手段
４で検波処理を行ない、直交検波信号を得る。直交する
２つの信号を周波数分析器５において複素演算により周
波数分析し、ＤＳＣ部６により走査変換することによ
り、血流速度情報を示すドプラスペクトラムを得る。一
方、周波数分析器５からのドプラスペクトラム情報から
しきい値処理を含むトレース演算手段８において図５に
示す方法により最高血流速度等の算出を行なう。最高血
流速度を算出する場合、ドプラスペクトラムの輝度上に
一定のしきい値を設け、そのしきい値を越える輝度を持
つ速度の最高速度を最高血流速度として算出する。その
最高血流速度情報を時間的に掃引し、トレース描画をト
レース描画手段９において行なう。そのトレース情報と
ＤＳＣ部６からドプラスペクトラム情報をトレース合成
手段７において合成処理し、表示部１０により表示す
る。The operation of the above configuration will be described below. The drive pulse generated by the transmission scanning circuit 2 is applied to the ultrasonic transducer of the ultrasonic probe 1, converted into an ultrasonic wave, and transmitted to the subject. Ultrasonic waves reflected from the subject are converted into electric signals by the ultrasonic transducer of the ultrasonic probe 1 and sent to the reception processing circuit 3. The reception signal is processed by the reception processing circuit 3 and then subjected to detection processing by the quadrature detection means 4 to obtain a quadrature detection signal. The two orthogonal signals are frequency-analyzed by complex operation in the frequency analyzer 5 and scan-converted by the DSC unit 6 to obtain a Doppler spectrum indicating blood flow velocity information. On the other hand, from the Doppler spectrum information from the frequency analyzer 5, the trace calculation means 8 including the threshold value processing calculates the maximum blood flow velocity and the like by the method shown in FIG. When calculating the maximum blood flow velocity, a certain threshold is provided on the luminance of the Doppler spectrum, and the maximum velocity of the velocity having a luminance exceeding the threshold is calculated as the maximum blood velocity. The maximum blood flow velocity information is temporally swept, and trace drawing is performed by the trace drawing means 9. The trace information and the Doppler spectrum information from the DSC unit 6 are combined in the trace combining unit 7 and displayed on the display unit 10.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記従
来の超音波ドプラ血流計では、トレース演算手段におい
て最高血流速度を算出するとき、スペクトラム上のノイ
ズ成分が高い場合等において正確なトレースを得るため
には、ゲイン等の各種パラメータを微妙に調整する必要
があり、図６に示すように１つのしきい値により最高血
流速度を算出する場合には、ノイズ等の成分が高い場合
は正確なトレースが行えなかった。However, in the conventional ultrasonic Doppler blood flow meter, when the maximum blood flow velocity is calculated by the trace calculation means, an accurate trace can be obtained when the noise component on the spectrum is high. Therefore, it is necessary to finely adjust various parameters such as gain, and when calculating the maximum blood flow velocity by one threshold as shown in FIG. 6, accurate calculation is performed when components such as noise are high. Trace could not be performed.
【０００６】本発明は、このような従来の問題を解決す
るものであり、最高血流速度の演算において、ドプラス
ペクトラム上のノイズ成分が高い場合であっても、正確
な最高血流速度トレース演算を可能とする超音波ドプラ
血流計を提供することを目的とするものである。The present invention solves such a conventional problem. In calculating the maximum blood flow velocity, even if the noise component on the Doppler spectrum is high, accurate calculation of the maximum blood flow velocity trace is performed. It is an object of the present invention to provide an ultrasonic Doppler blood flow meter that enables the above.
【０００７】[0007]
【課題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、トレース演算手段に２種類以上のしきい値
を設けたものである。According to the present invention, in order to achieve the above object, two or more threshold values are provided in the trace operation means.
【０００８】[0008]
【作用】したがって本発明によれば、トレース演算手段
に２種類以上のしきい値を設けることにより、スペクト
ラム上のノイズ成分が高い場合においても、正確な最高
血流速度トレース演算が可能となる。Therefore, according to the present invention, by providing two or more threshold values in the trace calculation means, it is possible to accurately calculate the maximum blood flow velocity trace even when the noise component on the spectrum is high.
【０００９】[0009]
【実施例】図１は本発明の一実施例の構成を示すもので
ある。図１において、１１は超音波探触子、１２は送信
走査回路、１３は受信処理回路、１４は直交検波手段、
１５は周波数分析器、１６はＤＳＣ部、１７はトレース
合成手段、１８は２種類以上のしきい値処理を含むトレ
ース演算手段、１９はトレース描画手段、２０は表示部
である。なお、超音波ドプラ血流の基本原理について
は、図４に示した従来例と同様であり、その差異はトレ
ース演算手段１８の処理方法による。FIG. 1 shows the configuration of an embodiment of the present invention. In FIG. 1, 11 is an ultrasonic probe, 12 is a transmission scanning circuit, 13 is a reception processing circuit, 14 is quadrature detection means,
Reference numeral 15 denotes a frequency analyzer, 16 denotes a DSC unit, 17 denotes a trace synthesizing unit, 18 denotes a trace calculating unit including two or more types of threshold processing, 19 denotes a trace drawing unit, and 20 denotes a display unit. The basic principle of the ultrasonic Doppler blood flow is the same as that of the conventional example shown in FIG.
【００１０】以上の構成について、その動作をトレース
演算手段１８について詳細に説明する。ドプラスペクト
ラムの輝度上の２種類のしきい値１、２を図２に示すよ
うに設ける。しきい値１は従来例と同様な値であり、し
きい値２はしきい値１よりも大きい。まずしきい値２を
越える輝度をもつ速度の最高速度であるＶ０を求める。
次にＶ０と流速表示の最高速度値Ｖ１の間において、し
きい値１を越える輝度を持つ速度の最低血流速度を最終
的な最高血流速度として得る。以上により、図３のよう
な正確な最高血流速度トレースを得ることができる。な
お、しきい値は２種類以上設けてもよい。The operation of the above configuration will be described in detail with respect to the trace calculation means 18. Two types of thresholds 1 and 2 on the brightness of the Doppler spectrum are provided as shown in FIG. The threshold value 1 is the same value as the conventional example, and the threshold value 2 is larger than the threshold value 1. First, V0, which is the highest speed having a luminance exceeding the threshold value 2, is determined.
Next, between V0 and the maximum velocity value V1 of the flow velocity display, the lowest blood flow velocity having a luminance exceeding the threshold value 1 is obtained as the final maximum blood flow velocity. Thus, an accurate maximum blood flow velocity trace as shown in FIG. 3 can be obtained. Note that two or more threshold values may be provided.
【００１１】[0011]
【発明の効果】以上説明したように、本発明によれば、
トレース演算手段に２種類以上のしきい値を設けること
により、ドプラスペクトラム上のノイズ成分が高い場合
であっても、正確な最高血流速度トレース演算が可能と
なる。As described above, according to the present invention,
By providing two or more threshold values in the trace calculation means, accurate maximum blood flow velocity trace calculation can be performed even when the noise component on the Doppler spectrum is high.
【図１】本発明の一実施例における超音波ドプラ血流計
の概略ブロック図FIG. 1 is a schematic block diagram of an ultrasonic Doppler blood flow meter according to an embodiment of the present invention.
【図２】本発明の一実施例におけるドプラ最高血流速度
トレース演算方法の模式図FIG. 2 is a schematic diagram of a Doppler maximum blood flow velocity trace calculation method according to an embodiment of the present invention.
【図３】本発明の一実施例におけるドプラ最高血流速度
トレース画面図FIG. 3 is a screen view of a Doppler maximum blood flow velocity trace in one embodiment of the present invention.
【図４】従来例における超音波ドプラ血流計の概略ブロ
ック図FIG. 4 is a schematic block diagram of an ultrasonic Doppler blood flow meter in a conventional example.
【図５】従来例におけるドプラ最高血流速度トレース演
算方法の模式図FIG. 5 is a schematic diagram of a Doppler maximum blood flow velocity trace calculation method in a conventional example.
【図６】従来例におけるドプラ最高血流速度トレース画
面図FIG. 6 is a diagram of a Doppler maximum blood flow velocity trace screen in a conventional example.
１１ 超音波探触子 １２ 送信走査回路 １３ 受信処理回路 １４ 直交検波手段 １５ 周波数分析器 １６ ＤＳＣ部 １７ トレース合成手段 １８ トレース演算手段 １９ トレース描画手段 ２０ 表示部 DESCRIPTION OF SYMBOLS 11 Ultrasonic probe 12 Transmission scanning circuit 13 Reception processing circuit 14 Quadrature detection means 15 Frequency analyzer 16 DSC part 17 Trace synthesis means 18 Trace calculation means 19 Trace drawing means 20 Display part
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) A61B 8/00 - 8/15 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) A61B 8/00-8/15
Claims (2)
から得られたエコー信号を直交検波する直交検波手段
と、直交する２つの信号を複素演算によって周波数分析
する周波数分析器と、前記周波数分析器から、速度分布
量に関して設けた２種類以上のしきい値により最高血流
速度を演算するトレース演算手段と、前記周波数分析器
から得られる情報を走査変換して得られた血流速度情報
を示すドプラスペクトラムを表す画像情報と前記最高血
流速度を時間的に掃引したトレース情報とを表示部に出
力する手段とを備えた超音波ドプラ血流計。1. A and orthogonal detection means for orthogonally detecting the echo signals obtained from the biological by transmitting and receiving ultrasonic waves, a frequency analyzer for frequency analysis of the two signals in quadrature by complex operation, the frequency analyzer From the velocity distribution
And tracing calculation means for calculating a maximum blood flow <br/> speed by two or more threshold provided for the amount, the frequency analyzer
Flow velocity information obtained by scan-converting the information obtained from
And image information representing the Doppler spectrum indicating the highest blood
Means for outputting, to a display unit, trace information obtained by temporally sweeping the flow velocity, on an ultrasonic Doppler blood flow meter.
から得られたエコー信号を直交検波する直交検波手段
と、直交する２つの信号を複素演算によって周波数分析
する周波数分析器と、前記周波数分析器から得られる情
報を走査変換するＤＳＣ部と、前記周波数分析器からの
情報から、速度分布量に関して設けた２種類以上のしき
い値により最高血流速度を演算するトレース演算手段
と、前記最高血流速度を時間的に掃引しトレース描画す
るトレース描画手段と、前記ＤＳＣ部からの情報とトレ
ース情報とを合成し表示部に出力するトレース合成手段
とを具備した超音波ドプラ血流計。Wherein the quadrature detection means for quadrature detection of the echo signals obtained from the biological by transmitting and receiving ultrasonic waves, a frequency analyzer for frequency analysis of the two signals in quadrature by complex operation, the frequency analyzer a DSC unit for scan conversion information obtained from the information from the frequency analyzer, and trace calculating means for calculating the maximum blood flow velocity by two or more threshold provided regarding velocity distribution amount, the maximum and trace drawing means for tracing rendering sweeping the blood flow velocity over time, the ultrasonic Doppler blood flow meter comprising a trace synthesis means for outputting information and trace information from the DSC unit synthesized on the display unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13766195A JP2956534B2 (en) | 1995-06-05 | 1995-06-05 | Ultrasound Doppler blood flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13766195A JP2956534B2 (en) | 1995-06-05 | 1995-06-05 | Ultrasound Doppler blood flow meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08322841A JPH08322841A (en) | 1996-12-10 |
| JP2956534B2 true JP2956534B2 (en) | 1999-10-04 |
Family
ID=15203869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13766195A Expired - Fee Related JP2956534B2 (en) | 1995-06-05 | 1995-06-05 | Ultrasound Doppler blood flow meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2956534B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3323350A3 (en) * | 2016-11-16 | 2018-06-20 | Huntleigh Technology Limited | Ultrasound doppler monitoring system |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4801912B2 (en) * | 2004-03-24 | 2011-10-26 | 株式会社東芝 | Ultrasonic diagnostic equipment |
| CN100587517C (en) * | 2004-08-30 | 2010-02-03 | 皇家飞利浦电子股份有限公司 | Adjustable tracing of flow velocities in doppler velocity spectra |
| JP4891590B2 (en) * | 2004-10-18 | 2012-03-07 | 株式会社東芝 | Ultrasonic Doppler measurement device and Doppler signal processing program |
| JP5044154B2 (en) * | 2006-07-03 | 2012-10-10 | セイコーインスツル株式会社 | Biological information measuring device |
-
1995
- 1995-06-05 JP JP13766195A patent/JP2956534B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3323350A3 (en) * | 2016-11-16 | 2018-06-20 | Huntleigh Technology Limited | Ultrasound doppler monitoring system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08322841A (en) | 1996-12-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6406430B1 (en) | Ultrasound image display by combining enhanced flow imaging in B-mode and color flow mode | |
| US20170020483A1 (en) | Ultrasound imaging system | |
| JP4722283B2 (en) | Method and apparatus for motion visualization in ultrasonic flow imaging using continuous data acquisition | |
| US6450959B1 (en) | Ultrasound B-mode and doppler flow imaging | |
| JP2001299764A (en) | Ultrasonographic instrument | |
| US7666142B2 (en) | Ultrasound doppler diagnostic apparatus and image data generating method | |
| US6322510B1 (en) | Ultrasonic imaging method and apparatus | |
| US7022078B2 (en) | Method and apparatus for spectral strain rate visualization | |
| JP2956534B2 (en) | Ultrasound Doppler blood flow meter | |
| US6500125B1 (en) | Ultrasound b/color priority threshold calculation | |
| JP4137516B2 (en) | Ultrasonic diagnostic equipment | |
| JP5455567B2 (en) | Ultrasonic diagnostic equipment | |
| US6685636B2 (en) | Ultrasonic tomography apparatus and ultrasonic tomography method | |
| JPS63130054A (en) | Ultrasonic diagnostic apparatus | |
| JP2916219B2 (en) | Ultrasound diagnostic equipment | |
| JP2823252B2 (en) | Ultrasound diagnostic equipment | |
| JP3366251B2 (en) | Ultrasound Doppler blood flow meter | |
| JP2830312B2 (en) | Ultrasound diagnostic equipment | |
| JP3569330B2 (en) | Ultrasound diagnostic equipment | |
| JP3273914B2 (en) | Ultrasound diagnostic equipment | |
| JP2830331B2 (en) | Ultrasound diagnostic equipment | |
| JP3353512B2 (en) | Ultrasound diagnostic equipment | |
| JPH05317312A (en) | Ultrasonic diagnosing apparatus | |
| JP4219626B2 (en) | Ultrasonic tomographic image generator | |
| JPH0412739A (en) | Ultrasonic diagnosing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 8 Free format text: PAYMENT UNTIL: 20070723 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 9 Free format text: PAYMENT UNTIL: 20080723 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090723 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 10 Free format text: PAYMENT UNTIL: 20090723 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 11 Free format text: PAYMENT UNTIL: 20100723 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 12 Free format text: PAYMENT UNTIL: 20110723 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110723 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120723 Year of fee payment: 13 |
|
| LAPS | Cancellation because of no payment of annual fees |