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    • 1. 发明申请
    • ULTRASONIC DIAGNOSTIC APPARATUS
    • 超声诊断设备
    • WO2005117709A8
    • 2006-12-21
    • PCT/JP2005010082
    • 2005-06-01
    • MATSUSHITA ELECTRIC IND CO LTDNAKAMURA YASUHIRO
    • NAKAMURA YASUHIRO
    • A61B8/00G01S7/52
    • G01S7/52025G01S7/52077
    • A technique is disclosed that provides a small-sized, low-cost ultrasonic diagnostic apparatus exhibiting a high sensitivity and a wide dynamic range without requiring any high-resolution A/D converters. According to the technique, an ultrasonic oscillator (1) that transmits/receives ultrasonic waves is driven by a drive circuit (2) that generates a pulse signal, while an echo signal received by the ultrasonic oscillator is inputted to an analog low-frequency attenuator (3), thereby attenuating the low-frequency components. An output signal from the analog low-frequency attenuator is then inputted to an A/D converter (4) and converted thereby into a digital signal, which is then inputted to a digital correction filter (5) so as to reinforce the low-frequency components as attenuated by the analog low-frequency attenuator, thereby outputting a digital signal having a frequency distribution substantially equal to that of the echo signal received by the ultrasonic oscillator.
    • 公开了一种技术,其提供了具有高灵敏度和宽动态范围的小尺寸,低成本的超声波诊断装置,而不需要任何高分辨率A / D转换器。 根据该技术,发送/接收超声波的超声波振荡器(1)由产生脉冲信号的驱动电路(2)驱动,而由超声波振荡器接收的回波信号被输入到模拟低频衰减器 (3),从而衰减低频分量。 然后,将来自模拟低频衰减器的输出信号输入到A / D转换器(4)并转换为数字信号,然后输入到数字校正滤波器(5),以增强低频 分量由模拟低频衰减器衰减,从而输出具有与由超声波振荡器接收的回波信号的频率分布基本相等的频率分布的数字信号。
    • 4. 发明公开
    • ULTRASONOGRAPHIC DEVICE
    • ULTRASCHALLGERÄT
    • EP1632183A4
    • 2008-11-05
    • EP04746011
    • 2004-06-10
    • MATSUSHITA ELECTRIC IND CO LTD
    • NAKAMURA YASUHIROUCHIKAWA AKIKOAKIYAMA HISASHINISHIGAKI MORIOYOSHITOMI HIDENORI
    • A61B8/00B06B1/02
    • A61B8/00A61B2560/0214B06B1/0215
    • There is provided a small-size low-price ultrasonographic device capable of appropriately controlling a predetermined transmission output in just proportion for a drive waveform different for each mode by using a single power supply section without affecting the characteristic of the drive waveform. The ultrasonographic device includes: ultrasonic wave generation means (1) for transmitting an ultrasonic wave; waveform generation means (2) for generating a single pulse or a burst-shaped pulse whose duty ratio can be varied in time unit of the cycle corresponding to a frequency out of the frequency band of the ultrasonic wave generation means (1) and driving the ultrasonic wave generation means (1); and a single power supply section (3) for deciding the amplitude of the drive waveform generated by the waveform generation means (2). Thus, the acoustic output of the ultrasonic wave transmitted can be controlled without changing the transmission amplitude.
    • 提供了一种小尺寸,低价格的超声波诊断装置,其能够在不影响驱动波形的特性的情况下,通过使用单个电源部分,针对每种模式不同的驱动波形适当地控制预定发送输出。 该超声波诊断装置包括:用于发送超声波的超声波发生装置(1) 波形发生装置(2),用于产生一个单脉冲或一个脉冲串状脉冲,其占空比可以以对应于超声波发生装置(1)的频带外的频率的周期的时间单位变化,并且驱动 超声波发生装置(1); 以及用于确定由波形发生装置(2)产生的驱动波形的幅度的单个电源部分(3)。 因此,可以控制所传输的超声波的声输出而不改变传输幅度。
    • 9. 发明专利
    • ULTRASONIC IMAGING SYSTEM
    • CA2097531C
    • 1997-05-20
    • CA2097531
    • 1993-06-02
    • MATSUSHITA ELECTRIC IND CO LTD
    • NAKAMURA YASUHIROAKIYAMA HISASHIAKAISHI SATOSHI
    • A61B8/00A61B8/14G01N29/44G01S7/52
    • An ultrasonic imaging system comprises an ultrasonic probe for transmitting and receiving an ultrasonic wave, driver unit for driving the ultrasonic probe, detector unit for detecting an echo signal received by the ultrasonic probe, filter unit being operative to pass a detection signal from the detector unit and having a plurality of passbands which have respective flat frequency response characteristics and respective gains different from each other, scanning conversion unit for converting the detection signal, which has passed through the filter unit, to a display signal to be displayed on a television, etc., and display unit receiving the display signal from the scanning conversion unit to display it as a tomographic image, whereby the filter unit operates to decrease respective amplitudes of high frequency components contained in the detection signal and to reduce a difference in brightness between adjacent scanning lines of the display unit, and flat frequency response characteristics of the filter unit prevent deterioration of frequency response characteristics of the detection signal, thereby making it possible to produce a tomographic image of high resolution up to the resolution limit of the scanning line of the display unit without impairing the image quality.
    • 10. 发明专利
    • DE69307957D1
    • 1997-03-20
    • DE69307957
    • 1993-06-04
    • MATSUSHITA ELECTRIC IND CO LTD
    • NAKAMURA YASUHIROAKIYAMA HISASHIAKAISHI SATOSHI
    • A61B8/00A61B8/14G01N29/44G01S7/52
    • An ultrasonic imaging system comprises an ultrasonic probe (11) for transmitting and receiving an ultrasonic wave, driver unit (12) for driving the ultrasonic probe (11), detector unit (15) for detecting an echo signal received by the ultrasonic probe (11), filter unit (18) being operative to pass a detection signal from the detector unit (15) and having a plurality of passbands which have respective flat frequency response characteristics and respective gains different from each other, scanning conversion unit (16) for converting the detection signal, which has passed through the filter unit (18), to a display signal to be displayed on a television, etc., and display unit (17) receiving the display signal from the scanning conversion unit (16) to display it as a tomographic image, whereby the filter unit (18) operates to decrease respective amplitudes of high frequency components contained in the detection signal and to reduce a difference in brightness between adjacent scanning lines of the display unit (17), and flat frequency response characteristics of the filter unit (18) prevent deterioration of frequency response characteristics of the detection signal, thereby making it possible to produce a tomographic image of high resolution up to the resolution limit of the scanning line of the display unit (17) without impairing the image quality.