专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPH04180742A RECEIVING CIRCUIT OF ULTRASONIC DIAGNOSTIC DEVICE 失效
公开(公告)号：JPH04180742A
公开(公告)日：1992-06-26
申请号：JP30891090
申请日：1990-11-16
申请人： HITACHI MEDICAL CORP
发明人： IKEDA HIROSHI , KONDO SHINICHI , KATAKURA KAGEYOSHI , ISHIKAWA SHIZUO
IPC分类号： G01N29/06 , A61B8/00
摘要： PURPOSE:To prevent the external noise from being displayed even in the cast a noise rushes in by storing separately noise data obtained newly and past noise data obtained previously, and executing a weighting arithmetic processing of the noise data obtained newly and the past noise data of the same raster. CONSTITUTION:The storage means is provided with a first storage means 5 for storing newly obtained data of at least a one-raster portion, a second storage means 7 for storing old data obtained before the stored data of a first storage means 5 by a one-frame portion, and an arithmetic means 6 for executing a weighting arithmetic processing of the data stored in a first storage means 5, and the data stored in a second storage means 7 of a raster from which the data is obtained. An output of this arithmetic means 6 is sent out to a D/A converting means 8, and on the other hand, the output is stored again in a second storage means 7. In such a way, the influence caused by an external noise and a system noise of a diagnostic device, etc., is reduced by the arithmetic processing, and the external noise is not displayed on an image.

2. 发明专利

JPH0245043A PULSE DOPPLER MEASURING INSTRUMENT 失效
公开(公告)号：JPH0245043A
公开(公告)日：1990-02-15
申请号：JP19503888
申请日：1988-08-04
申请人： HITACHI MEDICAL CORP
发明人： NISHIYAMA HISASHI , KATAKURA KAGEYOSHI , OGAWA TOSHIO , ISHIKAWA SHIZUO
IPC分类号： A61B8/06 , A61B5/0285
摘要： PURPOSE:To measure pulse Doppler with a high signal-to-noise ratio by obtaining the correlation between phase signals respectively having a specific time interval out of phase signals successively sampled at time intervals equal to the wave sending intervals of an ultrasonic wave pulse, obtaining a phase difference vector, and calculating a speed from the angle of the phase difference vector. CONSTITUTION:Out of the phase signals successively sampled at a time interval T equal to the wave sending interval of the ultrasonic wave pulse, the correlation between the phase signals respectively having the time interval of nT (n: an integer >=2) is obtained, the phase difference vector is obtained, and the speed is calculated from the angle of the phase difference vector. The ultrasonic wave pulse sent toward an arbitrary part in a heart at the wave sending interval T is reflected by a blood flow and received. When the received signal is inputted to an input terminal 100, a Doppler signal is detected by a phase comparator 1. The detected signal is made into time series data by an A/D converter 2. An output omegad of a divider 12-1 and a Doppler frequency (the output of a divider 12-2) omegad' obtained by an added part 413 are obtained, either of the outputs is selected by a discriminator 13, and the selected output is outputted.

3. 发明专利

JPS6480351A ULTRASONIC DOPPLER METER 失效
公开(公告)号：JPS6480351A
公开(公告)日：1989-03-27
申请号：JP23721187
申请日：1987-09-24
申请人： HITACHI MEDICAL CORP
发明人： OGAWA TOSHIO , NISHIYAMA HISASHI , KATAKURA KAGEYOSHI , ISHIKAWA SHIZUO
IPC分类号： G01P5/00 , A61B8/06 , G01F1/66 , G01P5/24 , G01S15/58
摘要： PURPOSE:To accurately measure the speed of a high speed object, by calculating the phase difference vector of the receiving signal between continuous transmission pulses and further measuring the difference between the phase differences from two continuous phase difference vectors. CONSTITUTION:A receiving signal is inputted to a demodulator 10 to be demodulated into a real part and an imaginary part. The demodulation signal is inputted to an MTI filter 12 through an A/D converter 11. A delay element 13-1 and a self-correlation device 14-1 operate a phase difference vector and this phase difference vector is inputted to a Doppler frequency operator 18 through a delay element 13-2 to calculate Doppler frequency. The delay element 13-2 and a self-correlation device 14-2 operate the difference vector of phase difference to input the same to a difference Doppler frequency operator 15 to calculate difference Doppler frequency. The output of a difference Doppler frequency operator 15 is added to the output of the Doppler frequency operator 18 or delay element 13-3 give through a change-over device 17 by an adder 16 to calculate Doppler frequency.

4. 发明专利

JPS6437936A MEASURING DEVICE FOR PULSE DOPPLER 失效
公开(公告)号：JPS6437936A
公开(公告)日：1989-02-08
申请号：JP19448487
申请日：1987-08-05
申请人： HITACHI MEDICAL CORP
发明人： NISHIYAMA HISASHI , KATAKURA KAGEYOSHI , OGAWA TOSHIO , ISHIKAWA SHIZUO
IPC分类号： A61B8/06 , G01F1/66
摘要： PURPOSE:To correct a Doppler frequency being measured so as to prevent the erroneous measurement of the direction of blood stream, by providing a means for obtaining a corrected value by multiplying an angle obtained from a phase difference vector by T/T3 and a means for addition-correcting a deflection angle of a transmitting interval T. CONSTITUTION:A transmitting signal with a preset frequency omega0 is repetitively output from a transmitting circuit 11 of an acoustic transducer 1 at a transmitting interval T via the transducer 1 to a reflection object 2. The reflected wave from the reflection object 2 is detected by the acoustic transducer 1 and its detected signal is input via a receiving amplifier 12 to a phase comparator 3. The constitution of a phase difference detector 64 and that of another phase difference detector 4 are similar to each other. An output vector Z from an angle detector 7 is input to another angle detector 65 to obtain an angle QA which is equal to omegadT3. A multiplier 66 multiples the ratio (m) of T to T3 by QA to input m.argZ into a correction value detector 67. There, a corrected angle thetaalpha is selected and a corrected Doppler angular frequency omega'd is calculated by a divider 8 and is then displayed by a display 10.

5. 发明专利

JPS6120012B2 JPS6120012B2 - 失效
公开(公告)号：JPS6120012B2
公开(公告)日：1986-05-20
申请号：JP17799781
申请日：1981-11-06
申请人： Hitachi Medical Corp
发明人： ISHIKAWA SHIZUO
IPC分类号： G01S7/52 , A61B8/00 , G01S15/89 , G06F1/02 , G06F1/035 , G06F7/552 , G06F17/10
CPC分类号： G06F1/0356 , G06F2101/08

6. 发明专利

JPH04158850A ULTRASONIC COLOR BLOODSTREAM DRAWING APPARATUS 失效
公开(公告)号：JPH04158850A
公开(公告)日：1992-06-01
申请号：JP28428890
申请日：1990-10-24
申请人： HITACHI MEDICAL CORP
发明人： KANDA HIROSHI , UMEMURA SHINICHIRO , NISHIYAMA HISASHI , SHINOMURA RYUICHI , KATAKURA KAGEYOSHI , ISHIKAWA SHIZUO
IPC分类号： A61B8/06
摘要： PURPOSE:To draw a bloodstream of a blood vessel accurately by extracting an artifact signal alone by a speed computation from a signal which does not pass through a high-pass filter to remove an artifact from the results of the speed computation of the signal which passes through the high-pass filter. CONSTITUTION:After the removal of harmonic components with an analog low-pass filters 81 and 91, signals are sampled with A/D converters 82 and 92, the digital signals are applied to digital filters 83 and 93 acting as a high- pass filter to extract a change portion thereof and inputted into a main speed computing section 100, a main dispersion computing section 101 and a main power computing section 102. The signals subjected to an A/D converter are supplied to a subspeed computing section 110 and a subpower computing section 111 arranged in parallel with the main computing sections 100, 101 and 102. An output of the subspeed computing section is obtained mainly based on an artifact. Thus, when the results of a subspeed computation are large, a display of speed information determined with the main speed computing section is forbidden being regarded as being attributed to the artifact.

7. 发明专利

JPH0155429B2 失效
公开(公告)号：JPH0155429B2
公开(公告)日：1989-11-24
申请号：JP1486782
申请日：1982-02-03
申请人： HITACHI MEDICAL CORP
发明人： KATAKURA KAGEYOSHI , OGAWA TOSHIO , UMEMURA SHINICHIRO , ISHIKAWA SHIZUO
IPC分类号： A61B8/00 , A61B8/14 , G01S7/52 , G01S7/523 , G01S15/89 , G10K11/34

8. 发明专利

JPS59174147A Ultrasonic photographing apparatus 失效
标题翻译：超声摄影装置
公开(公告)号：JPS59174147A
公开(公告)日：1984-10-02
申请号：JP4871383
申请日：1983-03-25
申请人： Hitachi Medical Corp
发明人： UMEMURA SHINICHIROU , KATAKURA KAGEYOSHI , OGAWA TOSHIO , ISHIKAWA SHIZUO
IPC分类号： A61B8/00 , A61B10/00

9. 发明专利

JPH09154841A NEEDLE-LIKE ULTRASONIC PROBE 失效
公开(公告)号：JPH09154841A
公开(公告)日：1997-06-17
申请号：JP31656295
申请日：1995-12-05
申请人： HITACHI MEDICAL CORP
发明人： YOKOZAWA KOICHI , SHINOMURA RYUICHI , ISHIKAWA SHIZUO
IPC分类号： A61B8/00 , H04R1/02
摘要： PROBLEM TO BE SOLVED: To increase transmitting receiving gain of an ultrasonic wave, and reduce capacity in a signal conductor inside of a needle by arranging a resonance coil between a transmitting receiving circuit and a converter in a needle- like ultrasonic probe to perform scanning by rotating and slidingly moving the converter. SOLUTION: In a needle-like ultrasonic probe, a partially hollow conductive internal needle 40 whose tip is composed of a paracentesis needle-like electric conductor is rotatably and slidably fitted in a hollow conductive external needle 35, and at least a single converter 10 is arranged on a side surface of its internal needle 40 through an insulator, and when an ultrasonic wave is transmitted and received, at least a part in which the converter 10 is arranged is exposed from the tip of the external needle 35, and is constituted so as to perform scanning by rotating and slidingly moving the converter 10 by a driving device. Electrodes 11 and 12 of the converter 10 are electrically connected by a signal conductor 50 to external electrodes 13 and 14 arranged so as to be insulated from the internal needle 40, and a resonance coil 80 is arranged between the external electrode 14 and a transmitting receiving circuit.

10. 发明专利

JPH06313764A ULTRASONIC SIGNAL PROCESSOR 失效
公开(公告)号：JPH06313764A
公开(公告)日：1994-11-08
申请号：JP22319993
申请日：1993-09-08
申请人： HITACHI MEDICAL CORP
发明人： KATAKURA KAGEYOSHI , MIWA YUICHI , MASUZAWA YUTAKA , SHINOMURA RYUICHI , ISHIKAWA SHIZUO , SATO YUTAKA
IPC分类号： A61B8/00 , G01N29/22 , G01N29/44
摘要： PURPOSE:To improve the effective accuracy of A/D conversion with a simple configuration by using the oversampling method for digital processing of ultrasonic signals and then performing accumulation addition processing after shifting to a low frequency. CONSTITUTION:A plurality of analog reception signals received by a transmitter/ receiver 23 consisting of a group of aligned wave reception element are digitized by a A/D converter and then are mixed with a reference signal, where time is precisely controlled, from a digital reference signal generation circuit 19 and then are converted to low-frequency signals. Then, accumulation addition processing is performed by a digital adder 4 for accumulation addition, thus extracting low-frequency components. Then, the signals which are subjected to accumulation addition are delayed by a digital delay circuit 7 and then signals which are delayed by a digital adder 3 are added, thus phasing the digital signal accurately.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式