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公开(公告)号：EP0253687A3
公开(公告)日：1988-06-22
申请号：EP87306419
申请日：1987-07-20
CPC分类号： A61B8/06 , A61B1/0056 , A61B8/12 , A61B8/445 , A61M25/0108 , A61M25/09033 , A61M2025/09083 , A61M2025/09091 , A61M2025/09175
摘要： An invasive, fluid velocity measuring wire guide particularly adapted and of a size (less than .030 inch) for subselective placement in the coronary arterial tree, which includes a Doppler mechanism for determining the blood flow velocity in the region of the distal end of the wire guide. Although the wire guide is particularly adapted for diagnosing coronary arterial disease subselectively; it is of such a size and manipulability to be useful in other blood flow and biological fluid flow analyses. Preferably, the wire guide is flexible and steerable for precise placement. The wire guide includes an elongated wire member having a Doppler crystal attached in longitudinal alignment at its distal end. Electrical leads extend from the Doppler crystal along the wire member to the appropriate test equipment for measuring the fluid flow velocity in the region of the Doppler crystal. Preferred embodiments of the Doppler means include piezoelectric crystals and piezoelectric polymers. Also disclosed is a guide wire with a laser Doppler means.
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公开(公告)号：EP0146073A3
公开(公告)日：1987-01-14
申请号：EP84114724
申请日：1984-12-04
发明人： Matsuo, Satoshi c/o Patent Division K.K. Toshiba , Miyajima, Yasuo c/o Patent Division K.K. Toshiba
IPC分类号： A61B08/06
CPC分类号： G10K11/346 , A61B8/06 , A61B8/13 , A61B8/14
摘要： @ An ultrasonic diagnosing apparatus transmits an ultrasonic wave into a subject under examination, thereby obtaining a tomogram and blood flow information of the subject. This ultrasonic diagnosing apparatus is equipped with an ultrasonic probe (27) provided with a transducer array (5), in which a plurality of ultrasonic transducer elements are arranged, and a Doppler transducer (9) consisting of an ultrasonic transducer independent of this transducer array (5), and switching devices (21, 24) for switching the operation mode of a transmitter/receiver system (12) of the transducer array (5) of this ultrasonic probe (27). The transducer array (5) is used for transmission and reception of the ultrasonic wave when obtaining a tomogram and is used for either the transmission or reception of a continuous ultrasonic wave when obtaining blood flow information. The Doppler transducer (9) provided in the same ultrasonic probe (27) as this transducer array (5) is used for either the transmission or reception of the continuous ultrasonic wave only when obtaining the blood flow information. The operation of the transducer array (5) is switched in a manner such that the transmitting/receiving system of the transducer array (5) is made operative in a different operation mode in response to a control signal output from a control signal generator.
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公开(公告)号：EP0100094A3
公开(公告)日：1986-02-05
申请号：EP83107339
申请日：1983-07-26
申请人： Aloka Co. Ltd.
发明人： Namekawa, Koroku
CPC分类号： G01S15/8979 , A61B8/06 , G01N29/0609 , G01S7/52071
摘要： An ultrasonic blood flow imaging method for two-dimensionally displaying the velocity distribution of a blood flow within a body to be examined is characterized in that the velocity distribution is displayed as a color picture in which the velocity direction is represented by one color when positive and by another different color when negative, and the magnitude of the velocity is represented by varying the brightness of the color concerned. An ultrasonic imaging apparatus for carrying out this method comprises an ultrasonic transmitter/receiver which outputs a tomographic image signal corresponding to a specific region of an object, and an average velocity signal and a velocity deviation signal corresponding to the velocity of blood flow within the specified region. These signals are stored in respective frame memories and then processed by a color processor to produce a color video signal which is input to a color display for displaying a tomographic image, and the velocity and velocity deviation of the blood flow.
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公开(公告)号：EP0159013A3
公开(公告)日：1988-05-11
申请号：EP85104578
申请日：1985-04-16
发明人： Powers, E. Jeffry
IPC分类号： A61B08/06
CPC分类号： G01S15/582 , A61B8/06 , G01S15/584 , G01S15/8979
摘要： The apparatus described unaliases a Doppler signal which is related to the velocity of blood flowing in a sample volume. It then generates an audio output corresponding to the unaliased Doppler signal. The device generates an unaliased, instantaneous signal which corresponds to the Doppler frequency associated with the blood velocity in the sample volume. That unaliased instantaneous frequency is fed into programmable read only memories (PROMs) which provide digitized values for the sine and cosine functions. Those values are fed into digital-to-analog converters, and they are scaled to provide audio outputs.
摘要翻译： 所描述的设备没有确定与血液在样本体积中流动的速度有关的多普勒信号。 然后它产生一个对应于非混叠多普勒信号的音频输出。 该装置产生一个非混淆的瞬时信号，该信号对应于与样本体积中的血液流速相关的多普勒频率。 该非混叠瞬时频率被馈入可编程只读存储器（PROM），为正弦和余弦函数提供数字化值。 这些值被馈送到数模转换器，并且它们被缩放以提供音频输出。
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公开(公告)号：EP0228069A3
公开(公告)日：1987-11-25
申请号：EP86117935
申请日：1986-12-23
申请人： Aloka Co. Ltd.
发明人： Namekawa, Kouroku
CPC分类号： G01S7/52071 , G01S15/8979 , G09G5/02
摘要： An ultrasonic blood flow imaging forming apparatus is described in which ultrasonic beams are transmitted into and reflected by a living body to color-display the distribution of velocity in a moving member and the properties of the living body's tissue on a CRT screen in the two-dimensional manner. The ultrasonic blood flow imaging apparatus includes a color processing section (26) for forming an image in accordance with vector signals, the color processing section including a color processor responsive to vector angles in the vector signals to change the hue (ROMs 42, 44, 46), and a brightness processor (54) responsive to amplitudes of the vector signals to change the brightness of the hue. The apparatus also includes a complementary color mixing processor (62) responsive to the third data of the living body obtained from the ultrasonic received signals to mix the hue which is outputted from the color processor with its complementary color. For example, when the motion of the moving reflective member is displayed, the directions of the moving reflective member are indicated with different hues corresponding to vector angles in the vector signals while the velocities of the moving reflective member are represented with different brightnesses corresponding to amplitudes of the vector signals. Furthermore, the third data including velocity deviations and others are displayed with a color saturation obtained by mixing the hue determined by the corresponding vector angle with its complementary color. Therefore, various states of the moving reflective member, that is, the velocity, brightness and direction can easily be observed with changes in the hue. Furthermore, the variance of the velocity represented by the velocity deviations can be observed with changes of the color saturation.
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公开(公告)号：EP0137317A3
公开(公告)日：1985-10-02
申请号：EP84110671
申请日：1984-09-07
CPC分类号： G01S15/8979 , A61B8/06
摘要： @ An ultrasonic wave blood flow meter comprises a probe (1) which sends to and receives an ultrasonic wave reflected with Doppler effect from the blood flow, a detecting circuit (12) for converting a frequency variation of the received reflected wave into a first signal whose amplitude varies with frequency and a second signal whose amplitude is kept constant, and first and second effective-value detecting circuits (6,6') for obtaining d.c. components of the first and second signals. A level discrimination circuit (9) is further provided for discriminating level of the d.c. component detected by the second effective-value detecting circuit. First and second sensitivity-variable amplifiers (10,10') are also provided for varying their sensitivities in accordance with the result of the level discrimination circuit. A dividing circuit (8) divides the d.c. component amplified by the first sensitivity-variable amplifier by the d.c. component amplified by the second sensitivity-variable amplifier, and a voltage hold circuit (11) holds the output of the dividing circuit in accordance with the discrimination result of the level discrimination circuit.
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公开(公告)号：EP0186732A3
公开(公告)日：1988-09-21
申请号：EP85111379
申请日：1985-09-09
申请人： Mauser, Rudolf
发明人： Mauser, Rudolf
IPC分类号： A61B08/06
CPC分类号： A61B8/06
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公开(公告)号：EP0172687A3
公开(公告)日：1988-08-10
申请号：EP85305478
申请日：1985-07-31
发明人： Albert, David Ernest
IPC分类号： A61B08/06
CPC分类号： A61B8/065
摘要： An apparatus for measuring instantaneous velocity or acceleration of blood in a blood vessel, the apparatus comprises means (32, 52, 54, 56, 60) for obtaining, from ultrasonic energy, a Doppler signal having a frequency spectrum determined by relative movement of the components of the blood in a blood vessel, the apparatus being characterised by having means (110 or 302 to 316) for tracking a predetermined portion of the spectrum, provided that when the predetermined portion is a high frequency edge of the spectrum, the Doppler signal is modulated up to a frequency above 100 kHz, to obtain a tracking signal representative of velocity, and optionally means (152 or 320) for differentiating the tracking signal to obtain a signal representative of acceleration.
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公开(公告)号：EP0157402A3
公开(公告)日：1988-08-10
申请号：EP85103905
申请日：1985-04-01
申请人： Aloka Co. Ltd.
IPC分类号： A61B08/06
CPC分类号： A61B8/06
摘要： An ultrasonic diagnostic device for measuring the velocity of blood flow within a living body comprises a transmitter for transmitting an ultrasonic wave into the body, a receiver for amplifying the part of the ultrasonic wave reflected from the body, converting it into an electric signal and amplifying the signal in accordance with a logarithmic amplification characteristic, a converter circuit which receives the amplified signal from the receiver and a reference signal from the transmitter and outputs a signal corresponding to the ratio of the component of the reflected ultrasonic wave attributable to the blood flow and the component thereof attributable to the wall of the blood vessel through which the blood flows, an extraction circuit which receives the amplified signal from the receiver and outputs a signal corresponding to the component attributable to the wall of the blood vessel, and an arithmetic circuit which multiplies the signals output by the converter circuit and the extraction circuit, whereby there is obtained a signal corresponding to the velocity of the blood flow.
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公开(公告)号：EP0157401A3
公开(公告)日：1987-08-05
申请号：EP85103904
申请日：1985-04-01
申请人： Aloka Co. Ltd.
IPC分类号： A61B08/06
CPC分类号： A61B8/06
摘要： An ultrasonic diagnostic device for measuring the velocity of blood flow within a living body comprises a receiver for amplifying a received wave in accordance with a logarithmic amplification characteristic and at least one inverse logarithmic converter which produces an output having an inverse logarithmic charac- teristicwith respect to the input thereto. As a result, the device can carry out high-precision measurement of blood flow even when the component of the received wave corresponding to the blood flow is much smaller than a component of the received wave corresponding to the wall of the blood vessel or heart through which the blood is flowing.
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