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公开(公告)号：US20180242951A1
公开(公告)日：2018-08-30
申请号：US15758259
申请日：2016-07-05
Applicant: Hitachi, Ltd.
Inventor： Misaki HIROSHIMA , Tomohiko TANAKA , Chizue TANAKA , Teiichiro IKEDA
CPC classification number: A61B8/5223 , A61B5/7257 , A61B8/14 , A61B8/145 , A61B8/4488 , A61B8/469 , A61B8/5207 , G01S7/52026 , G01S7/52036 , G01S7/52046 , G01S7/52066 , G06T7/0012 , G06T2207/10132
Abstract: Accuracy of spectrum analysis improves, and further reliability of information indicating tissue characterization of a living organ improves. A computation region, which is a target of frequency spectrum analysis, and a window region are set on a received signal. A plurality of received signals of the window region are weighted and the frequency spectrum analysis is performed on the received signals of the window region after the weighting. The weighting is performed by using weight distribution corresponding to strength distribution generated in the received signals of the window region in a case of assuming that the ultrasound transmitted from the plurality of transducers propagates as waves in the subject, reaches a target region in the subject which corresponds to the computation region, is reflected from the target region, then further propagates as waves in the subject, and reaches the plurality of transducers.
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2.发明申请公开(公告)号：US20180021013A1
公开(公告)日：2018-01-25
申请号：US15550151
申请日：2016-01-25
Applicant: Hitachi, Ltd.
Inventor： Mayumi SUZUKI , Teiichiro IKEDA , Hiroshi MASUZAWA , Chizue ISHIHARA
CPC classification number: A61B8/14 , A61B8/4488 , A61B8/54 , G01S7/52033 , G01S15/8915 , G01S15/8997
Abstract: In performing aperture synthesis according to an ultrasound imaging apparatus, the amount of spatial change of amplification factors of phasing signals at respective receive phasing points are reduced, and a high-quality image is obtained. In a receive beamformer that generates an inter-transmission weight in accordance with a phasing range, and performs aperture synthesis processing, the inter-transmission weight being generated is applied to the receive phasing points within the phasing range obtained through transmission and reception, and the inter-transmission synthesis is performed. The inter-transmission weight is generated in such a manner that a variation form of the amplification factor between adjacent receive phasing points is smoothed and a difference of the amplification factor is reduced, as to each receive phasing point after the inter-transmission synthesis is performed.
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公开(公告)号：US20180021012A1
公开(公告)日：2018-01-25
申请号：US15550099
申请日：2016-02-04
Applicant: Hitachi, Ltd.
Inventor： Misaki HIROSHIMA , Teiichiro IKEDA , Chizue ISHIHARA
CPC classification number: A61B8/14 , A61B8/4488 , G01S15/8925
Abstract: Without using any approximated wave front propagation model, appropriate delay times are set for received signals to obtain phased signals for both the inside and outside of irradiation area of transmission beam.A reception beamformer comprises a wave front propagation calculator 121 that obtains times until ultrasonic waves transmitted from a plurality of ultrasonic transducers arrive at a reception focus by calculation, and a delay time extractor 122 that calculates delay times for the reception focus on the basis of distribution of the arrival times of the ultrasonic waves for each of the plurality of the ultrasonic transducers obtained by the wave front propagation calculator 121. Therefore, even if the wave front that arrives at the reception focus has a complicated shape, it is not necessary to approximate the wave front, and phasing addition can be performed with appropriate delay times obtained from times until the ultrasonic waves arrive at the reception focus.
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公开(公告)号：US20170042510A1
公开(公告)日：2017-02-16
申请号：US15306880
申请日：2015-04-22
Applicant: HITACHI, LTD.
Inventor： Teiichiro IKEDA , Shinta TAKANO , Hiroshi MASUZAWA , Chizue ISHIHARA , Mayumi SUZUKI
Abstract: Reception beamforming is executed using delay times that complexly vary in accordance with differences between transmission conditions. An irradiation area 32 of a transmission beam is calculated, and the lengths of segments, using which delay times are calculated, are set in accordance with the positional relationships between the calculated irradiation area 32 and reception scanning lines 31. For example, the reception scanning lines 31 are divided into areas A to C, and the lengths of segments 40b in the outer area B located outside of the irradiation area 32 are set shorter than the lengths of segments 40a and 40c in the inner areas A and C.
Abstract translation: 使用根据传输条件之间的差异而复杂变化的延迟时间执行接收波束成形。 计算发射光束的照射区域32，并且根据计算的照射区域32和接收扫描线31之间的位置关系来设定计算延迟时间的片段的长度。例如，接收扫描 线31被划分为区域A至C，并且位于照射区域32外部的外部区域B中的区段40b的长度被设定为短于内部区域A和C中的区段40a和40c的长度。
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Patent Agency Ranking
5.发明申请公开(公告)号：US20210369121A1
公开(公告)日：2021-12-02
申请号：US17215187
申请日：2021-03-29
Applicant: Hitachi, Ltd.
Inventor： Tomohiko TANAKA , Teiichiro IKEDA , Ryo IMAI , Hirozumi TAKESHIMA
Abstract: Provided are an ultrasound imaging apparatus and a surgical operation support system for obtaining position information of a device outside an imaging area and presenting the position information to a user together with an ultrasound image. The surgical operation support system includes the ultrasound imaging apparatus, an ultrasonic source fixed to a therapeutic tool to be inserted into a subject body, a display device for displaying the ultrasound image and the position of the ultrasonic source. The ultrasound imaging apparatus is provided with a position estimator for estimating the position information of the ultrasonic source, and the position estimator analyzes a grating lobe artifact (false image) that is generated by the ultrasonic wave emitted from the ultrasonic source outside the imaging area, to estimate the position information of the ultrasonic source with respect to the imaging area.
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公开(公告)号：US20210312594A1
公开(公告)日：2021-10-07
申请号：US17217028
申请日：2021-03-30
Applicant: Hitachi, Ltd.
Inventor： Kazuhiro YAMANAKA , Teiichiro IKEDA , Nobuhiko FUJII , Misaki HIROSHIMA
Abstract: An ultrasonic imaging apparatus is capable of removing noise for each tissue from a received signal of a living tissue in which a plurality of tissues are intricately intertwined, and suppressing artifacts even at a tissue boundary. An evaluator receives one or more time-series ultrasonic signals obtained by receiving an ultrasonic wave from a subject by an ultrasonic probe after transmitting an ultrasonic wave, and generates a filter control signal for setting a characteristic value of a filter for removing noise contained in the ultrasonic signal, for a time-series direction of the ultrasonic signal. A filter processor removes the noise by processing the ultrasonic signal of the corresponding signal characteristic value by the filter having the characteristic value set based on the filter control signal. A smoothing processor that smooths distribution of the filter control signal is disposed between the evaluator and the filter processor.
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公开(公告)号：US20180242953A1
公开(公告)日：2018-08-30
申请号：US15755353
申请日：2016-07-25
Applicant: Hitachi, Ltd.
Inventor： Teiichiro IKEDA , Masanori HISATSU , Chizue ISHIHARA , Mayumi SUZUKI
CPC classification number: A61B8/5269 , A61B8/14 , A61B8/5207 , G01S7/52047 , G01S15/8927 , G01S15/8997
Abstract: A clutter reduction effect using adaptive beam forming is uniformly obtained with respect to the entire image even in an imaging condition in which the number of bundled signals is greatly distributed in an ultrasonic image. A received signal processing unit includes a summing unit that bundles the plurality of received signals for a predetermined imaging point or a plurality of signals obtained by processing the received signals, and a weighting unit that obtains a coherence value among the plurality of signals summed in the summing unit, and weights the plurality of signals before being summed in the summing unit or a signal obtained through summing in the summing unit, with a weight corresponding to the coherence value. The weighting unit weights the coherence value nonlinearly in a predetermined direction in the subject, and weights the plurality of signals before being summed in the summing unit or the signal obtained through summing in the summing unit by using the nonlinearly weighted coherence value.
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公开(公告)号：US20180021023A1
公开(公告)日：2018-01-25
申请号：US15547903
申请日：2016-01-05
Applicant: Hitachi, Ltd.
Inventor： Teiichiro IKEDA , Hiroshi KURIBARA , Chizue ISHIHARA , Mayumi SUZUKI , Misaki HIROSHIMA
CPC classification number: A61B8/5207 , G01S7/52095 , G01S15/8997 , G10K11/346
Abstract: There is realized an ultrasonic diagnostic apparatus that eliminates the restriction on the image generation in ultrasonic diagnostic apparatuses imposed by generation of no more than one delay curve, and enables imaging with higher resolution and higher speed.A received signal processor 12 comprises delayers 13, 14-1, and 14-2 disposed for every reception channel, and a synthesiser 60. The first delayer 13 delays received signals produced from a transmission beam 31 by a first delay time for phasing the received signals for a predetermined reception focus. The second delayer 14-1 delays received signals produced from a sound wave of a predetermined phase different from the phase of the transmission beam 31 by a second delay time for phasing the received signals for the same reception focus. The synthesiser 60 adds first phased signals generated by the first delayer, and second phased signals generated by the second delayer 14-1.
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公开(公告)号：US20170042509A1
公开(公告)日：2017-02-16
申请号：US15306851
申请日：2015-04-22
Applicant: Hitachi, Ltd.
Inventor： Teiichiro IKEDA , Hiroshi MASUZAWA , Shinta TAKANO , Chizue ISHIHARA , Mayumi SUZUKI
CPC classification number: A61B8/4488 , A61B8/14 , A61B8/145 , A61B8/5207 , A61B8/5269 , G01S7/5205 , G01S7/52085 , G01S15/8915 , G01S15/8997 , G10K11/346
Abstract: Reception beamforming that does not generate discontinuity in the vicinity of the depth of a transmit focus is executed even if reception scanning lines are disposed outside of the irradiation area of a focusing-type transmission beam. The degree of discontinuity showing the discontinuity of reception signals detected by plural ultrasound elements 105 or the degree of discontinuity regarding the discontinuity of the wave fronts of phased signals is detected by a discontinuity extracting unit 113. If there is an area where the degree of discontinuity is larger than a predefined value, a delay time generating unit 114 for discontinuity elimination changes the delay times in the area where the discontinuity is generated.
Abstract translation: 即使接收扫描线设置在聚焦型发送光束的照射区域的外侧，也执行不发生发送焦点深度附近的不连续的接收波束成形。 由不连续性提取单元113检测显示由多个超声波元件105检测到的接收信号的不连续性的不连续程度或相位信号的波前的不连续性的不连续程度。如果存在不连续程度的区域 大于预定值时，用于不连续消除的延迟时间生成单元114改变在产生不连续的区域中的延迟时间。
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