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公开(公告)号：US20220031282A1
公开(公告)日：2022-02-03
申请号：US17333192
申请日：2021-05-28
Applicant: Hitachi, Ltd.
Inventor： Atsuro SUZUKI , Yushi TSUBOTA , Takahide TERADA , Kazuhiro YAMANAKA , Kenichi KAWABATA
Abstract: A sound wave is transmitted to a subject from one or more transducers in an transducer array in which a plurality of the transducers are arranged. A measured sound pressure measured by a plurality of transducers for the sound wave transmitted through an imaging region of the subject is received from the transducers. The measured sound pressure is processed to generate a transmitted wave image in the imaging region. A simulated sound wave having a sound pressure changing with time is generated from a simulated sound source, the sound pressure when the simulated sound wave is transmitted through the imaging region and reaches a plurality of simulated detectors is obtained by calculation as a calculated sound pressure, and the transmitted wave image is sequentially corrected using the calculated sound pressure with the transmitted wave image as an initial image.
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公开(公告)号：US20210228180A1
公开(公告)日：2021-07-29
申请号：US16876200
申请日：2020-05-18
Applicant: Hitachi, Ltd.
Inventor： Takahide TERADA , Yushi TSUBOTA , Atsurou SUZUKI , Kenichi KAWABATA , Kazuhiro YAMANAKA
Abstract: An object of the invention is to provide an ultrasonic CT device in which a reflected signal or the like from an object disposed close to transducers is received, and a reception signal thereof can be received by a receiver while transceivers whose number is smaller than the number of the transducers are used. The ultrasonic CT device includes: a transducer array in which a plurality of transducers are arranged; transceivers whose number is smaller than the number of the transducers; and a transmission transducer selector and a reception transducer selector disposed for each of the transceivers. While a transmitter included in the transceiver is selectively connected to any of the transducers in the transducer array by the transmission transducer selector, a receiver included in the transceiver is selectively connected to any of the transducers in the transducer array by the reception transducer selector.
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公开(公告)号：US20210282745A1
公开(公告)日：2021-09-16
申请号：US17197145
申请日：2021-03-10
Applicant: Hitachi, Ltd.
Inventor： Kenichi KAWABATA , Hideki YOSHIKAWA , Hirozumi TAKESHIMA
IPC: A61B8/00 , C08F220/56 , C08F222/38
Abstract: Provided is an acoustic coupler capable of achieving both low elastic modulus and high deformability required for ultrasound imaging. The acoustic coupler is disposed between a probe for transmitting ultrasound waves and a subject, the acoustic coupler comprising a hydrogel including a copolymer that contains water. The copolymer comprises a monofunctional monomer having one ethylenically unsaturated group and a polyfunctional monomer having two to six ethylenically unsaturated groups. The molar ratio of the monofunctional monomer to the polyfunctional monomer is more than 90 and less than or equal to 3500.
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公开(公告)号：US20180296194A1
公开(公告)日：2018-10-18
申请号：US15762574
申请日：2016-03-25
Applicant: Hitachi, Ltd.
Inventor： Kazuhiro YAMANAKA , Kenichi KAWABATA , Takahide TERADA , Yushi TSUBOTA , Wenjing WU
Abstract: Information relevant to a state of a tissue in a subject (state information) is provided with technology reducing the amount of memory and computation necessary at the time of extracting the information. An ultrasonic wave is transmitted towards a subject, a transmission wave transmitted through the subject or a reflection wave reflected on the subject is received. A reception signal is generated on the basis of the transmission wave or the reflection wave. A tissue region candidate, of a region indicating a tissue of the subject, is set on the basis of the reception signal. State information, which is information relevant to a state of the tissue in the tissue region candidate, is calculated on the basis of the reception signal and the tissue region candidate. An ultrasonic image reflecting the state information is generated on the basis of the state information and displayed.
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公开(公告)号：US20180161014A1
公开(公告)日：2018-06-14
申请号：US15832232
申请日：2017-12-05
Applicant: Hitachi, Ltd.
Inventor： Wenjing WU , Kenichi KAWABATA , Yushi TSUBOTA , Takahide TERADA , Atsurou SUZUKI , Kazuhiro YAMANAKA
CPC classification number: A61B8/5261 , A61B6/0435 , A61B8/0825 , A61B8/14 , A61B8/15 , A61B8/406 , A61B8/4272 , A61B8/4477 , A61B8/4483 , A61B8/465 , A61B8/5269 , A61B8/54
Abstract: An error in a physical property value due to refraction of an ultrasonic wave is reduced, and thus the physical property value is calculated with high accuracy. A transducer of a transducer array transmits an ultrasonic beam to a subject placed in a predetermined imaging space, the transducer receives a transmission of the ultrasonic beam transmitted through the subject, and an image generating unit generates a transmission image based on the reception signal. The controller includes a focal length adjusting unit that adjusts a length between a focal position of the ultrasonic beam and the center of an imaging space to adjust a divergence angle of the ultrasonic beam.
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Patent Agency Ranking
公开(公告)号：US20210275132A1
公开(公告)日：2021-09-09
申请号：US17112004
申请日：2020-12-04
Applicant: Hitachi, Ltd.
Inventor： Kenichi KAWABATA , Kazuhiro YAMANAKA , Atsurou SUZUKI , Yushi TSUBOTA , Takahide TERADA
Abstract: Provided is an ultrasonic CT device capable of shaping a measurement part such as a breast of a measurement target into a shape suitable for measurement and reducing burden on the measurement target. The ultrasonic CT device includes a tubular measurement container, and a transducer array configured to transmit ultrasonic waves to a measurement target inserted in the measurement container and receive ultrasonic waves from the measurement target. Gel is disposed in the measurement container, and a surface of the gel is inclose contact with at least a surface of the measurement target to which the ultrasonic waves are transmitted. The ultrasonic waves transmitted from the transducer array pass through the gel and are emitted to the measurement target from the surface in close contact with the measurement target.
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公开(公告)号：US20200008784A1
公开(公告)日：2020-01-09
申请号：US16381037
申请日：2019-04-11
Applicant: Hitachi, Ltd.
Inventor： Kazuhiro YAMANAKA , Kenichi KAWABATA
Abstract: The invention is to provide an ultrasonic image with a clear tissue structure while reducing speckle noise of the ultrasonic image. An ultrasonic wave is transmitted from the transducer to the subject, and an echo generated in the subject is received. The first ultrasonic image and the second ultrasonic image are generated using a reception signal. The second ultrasonic image is an image smoother than the first ultrasonic image. The image processing unit calculates filter coefficients using pixel values of corresponding pixels of the first ultrasonic image and the second ultrasonic image, and generates an output image by processing one of the first ultrasonic image and the second ultrasonic image using the filter coefficients.
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公开(公告)号：US20190223833A1
公开(公告)日：2019-07-25
申请号：US16244841
申请日：2019-01-10
Applicant: HITACHI, LTD.
Inventor： Kazuhiro YAMANAKA , Kenichi KAWABATA , Takahide TERADA , Atsurou SUZUKI , Yushi TSUBOTA , Wenjing WU
Abstract: Provided is a device that transmits and receives an ultrasonic wave to and from an entire periphery of a specimen while preventing a movement of the specimen. An ultrasonic wave transmission and reception device includes: an oscillator array that is arrayed with an oscillator, the oscillator transmitting and receiving an ultrasonic wave; a fixing tool that is disposed between the oscillator array and the specimen and retains the specimen; and a drive mechanism that presses at least a part of the fixing tool against the specimen as to retain the specimen. An ultrasonic wave transmitted by the oscillator array passes through the fixing tool and irradiates on the specimen, and as for the oscillator array, the oscillator array and the fixing tool are disposed in a positional relationship such that the ultrasonic wave reflected by and/or passing through by the specimen and passing through the fixing tool is received.
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9.发明申请公开(公告)号：US20180271479A1
公开(公告)日：2018-09-27
申请号：US15762460
申请日：2016-06-23
Applicant: Hitachi, Ltd.
Inventor： Wenjing WU , Yushi TSUBOTA , Kenichi KAWABATA , Takahide TERADA , Kazuhiro YAMANAKA
CPC classification number: A61B8/14 , A61B8/0825 , A61B8/15 , A61B8/406 , A61B8/4483 , A61B8/461 , A61B8/5207
Abstract: According to the present invention, a clear transmitted wave image of a boundary of tissues is generated in a short time. An ultrasonic imaging device of the present invention includes a transducer array in which a plurality of transducers transmitting and receiving an ultrasound wave are arrayed; a transmission unit which delivers an electric signal to at least one of the plurality of transducers, such that the delivered electric signal is converted into an ultrasound wave, and transmits the ultrasound wave to a target; a reception unit which receives a received signal that is an electric signal output by each of the plurality of transducers having received a reflected wave and a transmitted wave of the ultrasound wave of the target; and an image generation unit which individually generates a reflected wave image of a cross section of the target using a received signal of the reflected wave and a transmitted wave image of the cross section of the target using a received signal of the transmitted wave. The image generation unit includes a reflected wave image boundary detection unit detecting a boundary of the target in the reflected wave image and generating the transmitted wave image such that a boundary in the transmitted wave image corresponding to the boundary detected by the reflected wave image boundary detection unit is emphasized.
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公开(公告)号：US20210030393A1
公开(公告)日：2021-02-04
申请号：US16816718
申请日：2020-03-12
Applicant: Hitachi, Ltd.
Inventor： Yushi TSUBOTA , Kenichi KAWABATA , Takahide TERADA , Atsurou SUZUKI , Wenjing WU , Kazuhiro YAMANAKA
Abstract: In an ultrasonic CT device for breast examination, unevenness of an ultrasonic image due to a distribution of inclination angles of a breast is reduced. The distribution of the inclination angles of a surface of a subject in a contour of the subject is obtained from a tomographic image, and a signal level of a reception signal or a pixel value of the tomographic image is corrected using the distribution of the inclination angles.
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