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公开(公告)号：US5031625A
公开(公告)日：1991-07-16
申请号：US555487
申请日：1990-07-30
CPC分类号： G10K11/346
摘要： A received ultrasonic phase matching circuit of the present invention, which utilizes variable delay lines having short delay times as the structural element of variable focus means having a larger aperture and realizes focusing to the regions from the region near the surface of object and to the deeper region thereof, comprises variable attenuators to be controlled individually and variable delay lines having the equal maximum delay times also to be controlled individually to the respective receiving channels forming the maximum aperture for reception of the ultrasonic echoes to form variable aperture by controlling variable attenuators and distribution of delay times for focusing in the aperture using only the variable delay times belonging to such aperture and add and combine the receiving signals delayed by the variable delay lines in the beam steering means.
摘要翻译： PCT No.PCT / JP89 / 00095 Sec。 371日期1990年7月30日 102（e）日1990年7月30日PCT 1989年1月30日PCT PCT。 出版物WO89 / 06933 日本1989年8月10日。本发明的接收超声波相位匹配电路，其利用具有较短延迟时间的可变延迟线作为具有较大孔径的可变焦点装置的结构元件，并实现对来自接近 物体表面和其较深的区域包括可单独控制的可变衰减器和具有相等的最大延迟时间的可变延迟线也被单独地控制到形成用于接收超声回波的最大孔径的各个接收通道以形成变量 通过控制可变衰减器的光圈和用于聚焦在光圈中的延迟时间的分布，仅使用属于这种孔径的可变延迟时间，并且将波长转向装置中延迟了可变延迟线的接收信号相加并组合。
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公开(公告)号：US4631710A
公开(公告)日：1986-12-23
申请号：US591036
申请日：1984-03-19
IPC分类号： G01S7/523 , A61B8/00 , G01S7/527 , G01S7/536 , G01S7/62 , G01S15/89 , G01S15/96 , G10K11/34 , G01S3/80
CPC分类号： G10K11/346 , G01S15/8918 , Y10S367/905
摘要： In ultrasonic transmission from and reception by an array probe in a phased array sonar, when an ultrasonic beam is directed substantially in front of the array probe, an ultrasonic wave having a high center frequency f.sub.o, or a bandwidth extending into higher frequencies, is transmitted and/or received in order to insure a high image resolution. When the ultrasonic beam is steered sideways, an ultrasonic wave having a lower center frequency f.sub.o, or a higher frequency range cutoff in relation to a steering angle .theta., is transmitted and/or received in order to increase the angle at which grating lobes are generated and hence prevent such grating lobes from entering the angle range of the field of view.
摘要翻译： 在相控阵声纳中的阵列探针的超声波发射和接收时，当超声波束被大体上定向在阵列探针的前面时，发射具有高中心频率fo或延伸到更高频率的带宽的超声波 和/或接收以确保高图像分辨率。 当超声波束被横向移动时，发射和/或接收具有较低中心频率fo或相对于转向角θ切断的较高频率范围的超声波，以便增加产生栅瓣的角度 并且因此防止这样的光栅波瓣进入视场的角度范围。
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公开(公告)号：US4445379A
公开(公告)日：1984-05-01
申请号：US362736
申请日：1982-03-29
CPC分类号： G01S7/5276 , G01N29/0645 , G01N2291/0289
摘要： An echo signal receiver receives higher level echo signals reflected from strong reflections sources or reflecting sources at areas close to a probe in a range of higher frequencies, and also receives lower level echo signals reflected from weak reflection sources or sources at areas remote from the probe in a range of low frequencies. The echo signal receiver comprises a multiple stage amplifier circuit for receiving the echo signal. Outputs from amplifiers at front stages are delivered via filters having higher frequency bands, and outputs from amplifiers at rear stages are delivered via filters having lower frequency bands. The outputs are passed through the filters and then combined into a single processed echo signal. As an alternative, a video signal derived from an echo signal which has passed through a circuit for varying frequency characteristics is compared with a reference voltage by a comparator, which produces an output that is rounded off by removing high frequency components in a low pass filter. The rounded off signal is fed to a circuit for varying frequency characteristics to control the same to change its frequency ban while the signal is being received. In another embodiment, the echo signal is received through a variable low cut filter having a cutoff frequency which can be increased or reduced dependent on the level of the echo signal.
摘要翻译： 回波信号接收器在较高频率的范围内从强反射源或靠近探头的区域反射的较高电平的回波信号接收较高电平的回波信号，并且还接收从远离探头的区域的弱反射源或光源反射的较低电平回波信号 在低频范围内。 回波信号接收机包括用于接收回波信号的多级放大器电路。 来自前级放大器的输出通过具有较高频带的滤波器输出，后级放大器的输出通过具有较低频带的滤波器输出。 输出通过滤波器，然后组合成单个经过处理的回波信号。 作为替代，将通过用于变化频率特性的电路的回波信号导出的视频信号通过比较器与参考电压进行比较，该比较器产生通过去除低通滤波器中的高频分量而舍入的输出 。 四舍五入的信号被馈送到用于变化的频率特性的电路以控制它，以在信号被接收时改变其频率禁止。 在另一个实施例中，回波信号通过可变低通滤波器接收，该可变低通滤波器具有可根据回波信号的电平而增加或减小的截止频率。
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公开(公告)号：US4475553A
公开(公告)日：1984-10-09
申请号：US396784
申请日：1982-07-09
申请人： Keiki Yamaguchi , Shinichi Sano , Hiromichi Akimoto , Takao Higashiizumi , Mineo Yamanaka , Takahiko Ishihara
发明人： Keiki Yamaguchi , Shinichi Sano , Hiromichi Akimoto , Takao Higashiizumi , Mineo Yamanaka , Takahiko Ishihara
CPC分类号： A61B8/0841 , A61B17/3403 , A61B8/0833 , A61B2017/3413
摘要： An ultrasonic probe, such as for use in ultrasonography, comprising a support having a front end, which may be held against a human body, and a central groove in the side thereof for guiding a puncture needle to move therethrough, and an array of rectangular ultrasonic transducer elements mounted on and lying flatwise on the front end, wherein one or more ultrasonic transducer elements are located adjacent to an open end of the groove at the front end between the other transducer elements, whereby the image display of the needle is improved.
摘要翻译： 例如用于超声检查的超声波探头，包括具有前端的支撑体，该前端可保持抵靠人体;以及位于其侧面的中心槽，用于引导穿刺针移动通过其中的矩形阵列 超声波换能器元件安装在前端上并且平坦地放置在其前端，其中一个或多个超声波换能器元件位于与其它换能器元件之间的前端处的槽的开口端附近，从而改善了针的图像显示。
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公开(公告)号：US4319489A
公开(公告)日：1982-03-16
申请号：US135157
申请日：1980-03-28
申请人： Keiki Yamaguchi , Yasuhito Takeuchi , Toru Shimazaki , Naoki Seki
发明人： Keiki Yamaguchi , Yasuhito Takeuchi , Toru Shimazaki , Naoki Seki
CPC分类号： G01S7/52085 , A61B8/00 , G01S15/8995 , G01S7/5206 , G10K11/34
摘要： An ultrasonic diagnostic method and apparatus are provided for probing the condition in a tissue of a living body by projecting an ultrasonic beam onto the living body from a vibrator array transducer probe consisting of a plurality of tiny ultrasonic vibrators. The apparatus executes two scanning actions, of which one is a normal linear scanning that drives the ultrasonic vibrators sequentially in the manner to cause a sequential parallel shift of the ultrasonic beam substantially perpendicular to the vibrator array, and the other of which is an inclined linear scanning that drives the ultrasonic vibrators at individually different timings while sequentially shifting the driven vibrators in the manner to cause sequential parallel shift of the ultrasonic beam having an angle of inclination against the vibrator array. The images obtained through the normal linear scanning and the inclined linear scanning are combined to form a composite high-resolution image.
摘要翻译： 提供一种超声波诊断方法和装置，用于通过从由多个微小的超声波振动器组成的振动器阵列换能器探针投射超声波束来探测生物体的组织中的状况。 该装置执行两个扫描动作，其中一个是以使得超声波束基本上垂直于振子阵列的顺序平行移动的顺序驱动超声波振动器的正常线性扫描，另一个是倾斜线性 扫描，以单独不同的定时驱动超声波振动器，同时顺序地移动被驱动的振动器，以使超声波束相对于振动器阵列具有倾斜角的顺序平行移动。 通过正常线性扫描和倾斜线性扫描获得的图像被组合以形成复合高分辨率图像。
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公开(公告)号：US5058176A
公开(公告)日：1991-10-15
申请号：US295038
申请日：1988-12-28
CPC分类号： G06T5/40 , G01R33/56 , G06T5/009 , G06T2207/10072 , G06T2207/10088
摘要： The image diagnosis apparatus of the present invention is equipped with means for automatically determining a window level and a window width for image displaying in accordance with the value of reconstructed image data. With this window level/window width calculating means (13), the window level is obtained with respect to each reconstructed image on the basis of the virtual average value of its pixel data and the window width is also obtained which has a certain relationship with that window level. When displaying each reconstructed image, a display is made in accordance with each window level and each window width thus obtained. Instead of the obtained window level and window width, those set by a manual setting section (23) may be used by a changeover operation when necessary.
摘要翻译： PCT No.PCT / JP87 / 00462 Sec。 371日期：1988年12月28日第 102（e）日期1988年12月28日PCT提交1987年7月2日PCT公布。 第WO88 / 00026号公报 日本1988年1月14日。本发明的图像诊断装置配备有根据重构图像数据的值自动确定窗口水平和窗口宽度的装置。 利用该窗口级别/窗口宽度计算装置（13），基于其像素数据的虚拟平均值，获得关于每个重建图像的窗口级别，并且还获得与该像素数据具有一定关系的窗口宽度 窗口级别。 当显示每个重建图像时，根据如此获得的每个窗口级别和每个窗口宽度进行显示。 代替获得的窗口级别和窗口宽度，在必要时可以通过切换操作来使用由手动设置部分（23）设置的窗口等级和窗口宽度。
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公开(公告)号：US4684889A
公开(公告)日：1987-08-04
申请号：US719750
申请日：1985-04-04
申请人： Keiki Yamaguchi , Kazuya Hoshino , Hideto Iwaoka
发明人： Keiki Yamaguchi , Kazuya Hoshino , Hideto Iwaoka
IPC分类号： A61B10/00 , A61B5/055 , G01R33/385 , G01R33/565 , G01N24/08
CPC分类号： G01R33/56563
摘要： An object which can provide a reference for measuring the intensity of a primary magnetic field, is positioned in the vicinity of a subject being examined. A variation in the primary magnetic field intensity is detected, based on a frequency shift of data observed of the object, and is used to control the primary magnetic field intensity, or reference frequency for phase detection, or to correct image data. In this manner image quality is prevented from being degraded due to the variation of the primary magnetic field intensity.
摘要翻译： 可以提供用于测量初级磁场的强度的参考的对象位于被检查对象的附近。 基于对象观察到的数据的频移来检测初级磁场强度的变化，并且用于控制初级磁场强度或用于相位检测的参考频率或校正图像数据。 以这种方式，由于初级磁场强度的变化，防止图像质量劣化。
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8.发明授权Apparatus for recording CT images directly on a recording medium without using a CRT 失效用于在不使用CRT的情况下将CT图像直接记录在记录介质上的装置
公开(公告)号：US4777535A
公开(公告)日：1988-10-11
申请号：US74538
申请日：1987-06-23
申请人： Keiki Yamaguchi , Masahiko Hasumi , Shozo Tomita , Edward L. Gow
发明人： Keiki Yamaguchi , Masahiko Hasumi , Shozo Tomita , Edward L. Gow
CPC分类号： H04N1/1903 , H04N1/193 , H04N1/1934 , H04N1/4056
摘要： A medical image recording apparatus according to the present invention in which the optical path length of the optical system is extremely short and the number of mechanical operating mechanisms is reduced electronically scans an LED array assembly (14) having a plurality of one-dimensionally arranged LED's with an LED array controller (28) and feeds a photosensitive recording medium (15) in a direction perpendicular to the direction of arrangement of the LED's by means of a motor (17) controlled by a film feed controller (29). The LED array controller and the film feed controller are operated on the basis of commands given from a scanning controller (27) which is controlled by a CPU. The quantity of light emitted from each individual LED in the LED array assembly is controlled in accordance with a signal given to the LED array controller, the signal being formed in such a manner that image data which is stored in an image data storing memory (22) through an input interface (21) is formatted by means of an image formatter (25) and then converted into an analog signal by means of a D/A converter (26) or a pulse-width modulation circuit (30).
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公开(公告)号：US4700136A
公开(公告)日：1987-10-13
申请号：US796603
申请日：1985-11-08
申请人： Keiki Yamaguchi , Hideto Iwaoka , Tadashi Sugiyama , Yuji Inoue
发明人： Keiki Yamaguchi , Hideto Iwaoka , Tadashi Sugiyama , Yuji Inoue
IPC分类号： A61B5/055 , A61B10/00 , G01R33/3875 , G01R33/48 , G01R33/22
CPC分类号： G01R33/3875
摘要： An NMR imaging domain is required to have a uniform distribution of static magnetic field. However, it is very difficult to generate a uniform magnetic field for an entire imaging domain, which is usually a spherical domain. The invention advantageously, exploits the requirement that to obtain imaging the static magnetic field need only be uniform as the slicing part. Thus, sufficient uniformity of static magnetic field is obtained in the invention by providing one or more shim coils to a static magnetic field generating coil and selectively controlling current to be applied to each shim coil in relation to data defining the imaging domain.
摘要翻译： NMR成像域需要具有均匀的静磁场分布。 然而，对于通常是球形域的整个成像域来说，产生均匀的磁场是非常困难的。 本发明有利地利用了为了获得成像静电磁场的要求，仅需要作为切片部分是均匀的。 因此，通过向静态磁场产生线圈提供一个或多个垫片线圈并且相对于定义成像域的数据选择性地控制要施加到每个垫片线圈的电流，从而在本发明中获得了足够的静态磁场均匀性。
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公开(公告)号：US4501278A
公开(公告)日：1985-02-26
申请号：US555356
申请日：1983-11-28
申请人： Keiki Yamaguchi , Shinichi Sano
发明人： Keiki Yamaguchi , Shinichi Sano
CPC分类号： A61M5/427 , A61B8/0833 , A61H39/007
摘要： An ultrasonic probe for puncture treatments is constructed in a manner that a guide member, for guiding a puncture needle, is provided on a side surface of an ultrasonic probe of a linear scanning type, with a needle being positioned by the guide member to be movable at right angles to the surface of the body of a patient, and a beam of ultrasonic wave is emitted by the probe in a direction oblique to the length dimension of the needle. The probe may be positioned obliquely to the needle, in which case, an acoustic coupling member of a wedge shape is inserted in the gap formed between the emitting end of the probe and the body. Alternatively, the probe may be positioned parallel with the needle in which case a wedge shaped member capable of deflecting the ultrasonic waves, is placed on the emitting end of the probe, and a wedge shaped acoustic coupling member is connected to the deflecting member so as to deflect the ultrasonic waves to be oblique to the needle within the body. The needle may be an acupuncture needle, a cannula, a tube, or the like.
摘要翻译： 用于穿刺处理的超声波探头被构造成使得用于引导穿刺针的引导构件设置在线性扫描型的超声波探头的侧表面上，其中针由引导构件定位成可移动 与患者的身体的表面成直角，并且探针沿着与针的长度尺寸相反的方向发射超声波束。 探针可以倾斜地定位在针上，在这种情况下，将楔形形状的声耦合构件插入形成在探针的发射端和身体之间的间隙中。 或者，探针可以与针平行定位，在这种情况下，能够偏转超声波的楔形构件被放置在探针的发射端上，楔形声耦合构件连接到偏转构件，以便 以使超声波偏转到身体内的针。 针可以是针灸针，套管，管等。
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