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1. 发明专利

JPS5228226A PATTERN INDICATOR 失效
公开(公告)号：JPS5228226A
公开(公告)日：1977-03-03
申请号：JP10396575
申请日：1975-08-29
申请人： HITACHI LTD , HITACHI MEDICAL CORP
发明人： OOSHIMA YOSHIMITSU , FUJIKATA KENJI , YOKOZAWA NORIO , ASAKAWA IWAO
IPC分类号： G06F3/153 , G06F3/14 , G09G5/22 , G09G5/24 , G09G5/36
摘要： PURPOSE:Pattern memory for letter generation of letter indicator is made to memorize partial pattern of the pattern and movements within the letter indicating position, so as to indicate pattern.

2. 发明专利

JPS61181959A SIGNAL DETECTOR FOR ULTRASONIC APPARATUS 失效
公开(公告)号：JPS61181959A
公开(公告)日：1986-08-14
申请号：JP2176385
申请日：1985-02-08
申请人： HITACHI LTD , HITACHI MEDICAL CORP
发明人： TAKASUGI KAZUO , SHINOMURA RYUICHI , YOKOZAWA NORIO
IPC分类号： A61B8/00 , G01H11/08 , G01N29/44
摘要： PURPOSE:To minimize effect from the inter-electrode capacity of a piezo-electric element and the electrostatic capacity of a cable, by connecting a low-impedance element to both ends of the piezo-electric element to detect the current flowing therethrough. CONSTITUTION:A signal source impedance 100, a parallel impedance 200, a series impedance 300 and a receiving amplifier 400 whose input impedance is indicated by 401 are so arranged that an output develops at the output 402 of the amplifier corresponding to the value of the current flowing through the input impedance 401. The input impedance 401 of the amplifier shall be a load element so as to be sufficiently lower in the impedance value as compared with the equivalent signal source resistance 12 of a piezo-electric element and the series element 300. In this case, normally, it is easy to make the sum of impedance values of 401 and 300 lower than that of the parallel impedance 200. This enables efficient flowing of the signal current from an echo signal source 11 to the 401 thereby reducing the deterioration of signals due to parallel elements to a slight level.

3. 发明专利

JPH05228141A BONE DIAGNOSTIC DEVICE BY ULTRASONIC WAVE 失效
公开(公告)号：JPH05228141A
公开(公告)日：1993-09-07
申请号：JP3755792
申请日：1992-02-25
申请人： HITACHI LTD , HITACHI MEDICAL CORP
发明人： SHINOMURA RYUICHI , KANDA HIROSHI , YOKOZAWA NORIO
IPC分类号： A61B8/00 , A61B8/08 , A61B10/00 , G01N29/06 , G01N29/22 , G01N29/44
摘要： PURPOSE:To provide the bone diagnostic device for obtaining a diagnostic index of a bone without being influenced by a shape of the bone, without measuring a distance of two ultrasonic probes, and moreover, without being influenced by other soft tissue than the bone to the utmost. CONSTITUTION:A subject to be examined is placed between an ultrasonic probe 2 and an ultrasonic probe 3, transmission is executed by a frequency f1 by the ultrasonic probe 2, a signal which transmits through the subject is received by the ultrasonic probe 3, and subsequently, transmission is executed by a frequency f2 from the ultrasonic probe 2, reception is executed by the ultrasonic probe 3, a frequency shift f1' of a frequency between a first receiving signal of the ultrasonic probe 3 and f1 is derived, a frequency shift f2' of a frequency between the next receiving signal of the ultrasonic probe 3 and f2 is derived, and a ratio of f1' to f2' is derived.

4. 发明专利

JPH03121058A SUPERSONIC DIAGNOSING DEVICE 失效
公开(公告)号：JPH03121058A
公开(公告)日：1991-05-23
申请号：JP25835289
申请日：1989-10-03
申请人： HITACHI MEDICAL CORP , ISHIHARA KEN , TAUCHI JUN
发明人： ISHIHARA KEN , KITAHATA AKIRA , TAUCHI JUN , KODAMA MASASHIO , KISHIMOTO SHINJI , YOKOZAWA NORIO
IPC分类号： G01N29/06 , A61B8/00
摘要： PURPOSE:To draw whole movement of moving organs without using a contrast medium by carrying out calculation for tomograph data in an inspected body including the moving texture between the images in time sequence which are obtained by the tomography scanning through the repetition in a prescribed cycle by a supersonic transmission/receiving means and generating the differential image data for display. CONSTITUTION:When the writing-in of data into the second image memory area 13b is completed with the progress of the supersonic scanning, the second image is formed. Then, a controller 17 allows the image elements of the images to correspond from the first and second image memory areas 13a and 13b, and the both memory data are read out, and outputted into a subtraction calculator 14. In the subtraction calculator 14, subtraction calculation is carried out for each image element data inputted in correspondence, and the differential data between the first and second images is outputted. data differential data outputted from the subtraction calculator 14 is analogue-converted by a D/A converter 15, and outputted into a display device 16 in succession. The display device 16 displays the inputted video signals, i.e., the differential image in brilliancy modulation.

5. 发明专利

JPH0244282A INTEGRATION CIRCUIT IN RADIATION MEASURING CIRCUIT 失效
公开(公告)号：JPH0244282A
公开(公告)日：1990-02-14
申请号：JP19440788
申请日：1988-08-05
申请人： HITACHI MEDICAL CORP
发明人： MORIYA ATSUSHI , YOKOZAWA NORIO , TAKEDA YASUSHI
IPC分类号： G01T1/17 , A61B6/03
摘要： PURPOSE:To prevent the large variation of ON-resistance due to the input signal by making it possible to alter the back gate potential of the MOSFET used in the switch connected to an operational amplifier, an integrating condenser and a signal route of an input signal in series. CONSTITUTION:When a signal 3phi is set to a high level signal and a signal 3phi is set to a low level signal, the low level signal 3phi is inputted to a gate and MP32 becomes a non-continuity state. Therefore, the third switch S3 is turned ON and the potential of the back gate of MP3 being PMOS is connected to the signal potential V1 of a signal route through MP31 brought to a continuity state. Therefore, even when the above mentioned signal potential V1 becomes almost equal to the min. signal in a circuit, no substrate bias effect is generated and it can be prevented that the ON-resistance of the MP3 being PMOS is largely varied by an input signal.

6. 发明专利

JPH01212544A ULTRASONIC WAVE DIAGNOSTIC UNIT 失效
公开(公告)号：JPH01212544A
公开(公告)日：1989-08-25
申请号：JP3755488
申请日：1988-02-22
申请人： HITACHI MEDICAL CORP
发明人： KONDO TOSHIRO , YOKOZAWA NORIO , ISHIDA KAZUNARI , KAMIYAMA AKIHIRO
IPC分类号： A61B8/14 , G01N29/04
摘要： PURPOSE:To enable automatic setting of the delay amount of a delay circuit with reduced error by recognizing the ultrasonic frequency of a probe correspond ing to the type thereof, and selecting the tap position of a delay wire associated with a tap matching with the probe to be used. CONSTITUTION:When an inspection probe 2 is connected to a connector 18, a decoder 20 reads out the identifier of the probe 2 to produce an identification signal Id1 which is fed to the terminal p1 of a first ROM16a in delay circuits 19a-19n. Then control signals are fed from a scan control circuit 13 to the input terminals r1-r8 in the first ROM16a and tap position data are read out and fed to the control input terminals A1-A4, B1-B4 of first and second switches 15a, 15b. The switches 15a, 15b switch respective switches C1-C16, D1-D16 corresponding to the input terminals and select the tap positions of first and second delay wires 14a, 14b associated with taps. Consequently, delay amounts of respective delay circuits 19a-19n are set.

7. 发明专利

JPH01160537A ULTRASONIC DIAGNOSTIC APPARATUS 失效
公开(公告)号：JPH01160537A
公开(公告)日：1989-06-23
申请号：JP31741687
申请日：1987-12-17
申请人： HITACHI MEDICAL CORP
发明人： KONDO TOSHIRO , KISHIMOTO SHINJI , YOKOZAWA NORIO
IPC分类号： A61B8/14 , G01N29/04 , G01N29/06 , G01N29/44
摘要： PURPOSE:To magnify the dynamic range of a signal to be handled, by constituting an A/D converter circuit of a multiplier making the dynamic range of an analogue echo signal variable, an A/D converter and a data converter for converting the output data of the A/D converter. CONSTITUTION:The analogue signal from a delay circuit 13 of an analogue system is inputted to the first A/D converter 23a as it is and inputted to the second converter 23b while the dynamic range of the signal is made variable by a multiplier 22. When k=5 is set in the multiplier 22 and the magnification thereof is set to 1/2 while m=10 is set in the first and second A/D converters 23a, 23b and the number of bits thereof are set to 10bits, two 10-bit A/D converters (23a, 23b) are used from the relation between the input and output data from the first and second A/D converters 23a, 23b to a data converter 24 to realize an A/D converter circuit 14 having a 15-bit dynamic range as a whole.

8. 发明专利

JPH03234244A RECEIVING AND PHASING CIRCUIT FOR ULTRASONIC DIAGNOSTIC DEVICE 失效
公开(公告)号：JPH03234244A
公开(公告)日：1991-10-18
申请号：JP2966490
申请日：1990-02-13
申请人： HITACHI MEDICAL CORP
发明人： SUGIYAMA TAKASHI , YOKOZAWA NORIO
IPC分类号： G01N29/06 , A61B8/00 , G01N29/22 , G01N29/44 , G01S7/52 , G01S7/526
摘要： PURPOSE:To reduce the noise at the time of switching a delay time by coupling a current source means and an analog switch as AC, eliminating an operating current which passes through a delay element and the analog switch and is supplied to the current source means, and also, supplying the operating current to its current means by resistance pull-up. CONSTITUTION:A capacitor C2 is connected between a current source means 1 and a selector 4, a capacitor C3 is connected between an analog switch 2 and a transistor 7, a capacitor C4 is connected between an analog switch 3 and a transistor 7', and an operating current which passes through a delay element 5 and the switches 2, 3 and is supplied to the current source means 1 is eliminated. Also, to a collector of a transistor 6 of the current source means 1, a power source +V is connected by using a resistance R6, a DC current I2 is supplied, the transistor 6 is held in an operating state, and to an emitter side of the transistor 7, a power source -V is connected by using a resistance R7, a DC current I3 is allowed to flow to the collector, and the transistor 7 is held in an operating state. According to this configuration, even if the switches 2, 3 are opened and closed in order to switch taps T1, T2 of the delay element 5, the operating current of the current source means 1 is held constant, and a noise at the time of switching can be reduced.

9. 发明专利

JPH01214345A DELAY CIRCUIT 失效
公开(公告)号：JPH01214345A
公开(公告)日：1989-08-28
申请号：JP3965288
申请日：1988-02-24
申请人： HITACHI MEDICAL CORP
发明人： KAMIYAMA AKIHIRO , ISHIDA KAZUNARI , KONDO TOSHIRO , YOKOZAWA NORIO
IPC分类号： A61B8/00 , G01N29/04 , G01N29/24
摘要： PURPOSE:To always reduce the stray electrostatic capacity of wiring and to increase a degree of freedom from the aspect of the mounting planning to a substrate by constituting a delay line and the transistors connected to the taps of the delay line on the same substrate so as to approach each other in an integrally incorporated state. CONSTITUTION:A delay circuit is constituted by integrally incorporating a single delay line 2 having a large number of taps t1-tn corresponding to delay times and the transistors Tr1-Trn connected to the taps t1-tn of the delay line 2 on the same substrate 12 so as to approach each other. As mentioned above, when the delay line and the transistors are arranged on the same substrate 12 so as to approach each other, even if the wiring of delay circuit input terminals T1-Tn and the emitters of the transistors Tr1-Trn becomes long, the wiring length between the delay line 2 and the signal output terminals of the transistors Tr1-Trn becoming a problem such as an increase in stray electrostatic capacity or the characteristic change from the aspect of the alteration of planning can be shortened.

10. 发明专利

JPH06334464A SIGNAL ATTENUATION CIRCUIT 失效
公开(公告)号：JPH06334464A
公开(公告)日：1994-12-02
申请号：JP11998793
申请日：1993-05-21
申请人： HITACHI MEDICAL CORP
发明人： YOKOZAWA NORIO , KUBOTA JUN , OKADA KAZUTAKA
IPC分类号： A61B8/00 , H03H7/25
摘要： PURPOSE:To prevent potential fluctuation in the attenuation control operation from being given to a signal transmission circuit by inserting a series resistor on the way of the signal transmission circuit and connecting a diode couple of anti-parallel connection between an input point of a reception circuit and ground so as to form a voltage division circuit. CONSTITUTION:A series resistor 4 is inserted on the way of the circuit between a signal source 3 and a reception circuit 5 and a series circuit comprising a diode 11 and a capacitor 14 is connected between an input hot 55 and ground of the reception circuit 5. Furthermore, a series circuit comprising a diode 21 connected in an opposite polarity and a capacitor 24 is connected between an input hot 55 of the reception circuit and ground similarly. Then power supplies 13, 23 supplying a current of the same value through resistors 12, 22 are provided in a direction biasing the diodes 11, 21 in the forward polarity. Thus, potential fluctuation of the signal transmission circuit in the attenuation control operation and noise invasion from the attenuation control circuit to the signal transmission circuit when the attenuation is set to zero are prevented.

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