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公开(公告)号：US20170319078A1
公开(公告)日：2017-11-09
申请号：US15655097
申请日：2017-07-20
Applicant: FUJIFILM Corporation
Inventor： Kazuhiro HIROTA , Tadashi KASAMATSU
IPC: A61B5/00 , H01S3/092 , H01S3/06 , G01N29/44 , G01N29/06 , G02B26/04 , G01N29/24 , H01S3/115 , H01S3/00
CPC classification number: A61B5/0095 , G01N29/0654 , G01N29/2418 , G01N29/44 , G01N2291/0289 , G01N2291/10 , G02B26/04 , H01S3/005 , H01S3/061 , H01S3/092 , H01S3/115
Abstract: A flash lamp 32 excites a laser rod 31. A Q switch 35 which changes the loss of the optical resonator according to the voltage applied is inserted on the optical path of a pair of mirrors 33 and 34 forming the optical resonator. An optical path shutter 39 is provided on the optical path of laser emission light. In a first operation mode in which laser emission is performed, the optical path shutter 39 is opened and the voltage applied to the Q switch 35 is changed from a high voltage to, for example, 0 V to emit pulsed laser light after the flash lamp 32 excites the laser rod 31. In a second operation mode in which the laser emission is interrupted and waited for, the optical path shutter 39 is closed and the voltage applied to the Q switch 35 is, for example, 0 V.
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2.发明申请PHOTOACOUSTIC MEASUREMENT DEVICE, PHOTOACOUSTIC MEASUREMENT METHOD, AND PROBE CONTACT DETERMINATION METHOD 审中-公开光电测量装置，光电测量方法和探头接触确定方法公开(公告)号：US20150335252A1
公开(公告)日：2015-11-26
申请号：US14816912
申请日：2015-08-03
Applicant: FUJIFILM Corporation
Inventor： Kazuhiro HIROTA
CPC classification number: A61B5/0095 , A61B5/6843 , A61B5/6844 , A61B5/7203 , A61B5/7246 , A61B2562/04
Abstract: A photoacoustic measurement device 10 includes a probe 11 having a light emitting unit that emits measurement light L and a plurality of acoustic wave detection elements, a determination unit 28 that determines whether a state between the probe 11 and a subject M is a contact state or a non-contact state, and a light intensity control unit (for example, a switching control unit 36 and an intensity switching unit 37) that controls the intensity of the measurement light such that the measurement light has a first intensity or a second intensity higher than the first intensity, on the basis of the determination result of the determination unit 28. The determination unit 28 performs the determination on the basis of the status of a change in a plurality of photoacoustic signals detected by the plurality of acoustic wave detection elements.
Abstract translation: 光声测量装置10包括具有发射测量光L的发光单元和多个声波检测元件的探测器11，确定单元28，其确定探测器11和被摄体M之间的状态是否是接触状态， 非接触状态，以及控制测量光强度的光强度控制单元（例如，切换控制单元36和强度切换单元37），使得测量光具有第一强度或第二强度 基于确定单元28的确定结果，确定单元28基于由多个声波检测元件检测到的多个光声信号的变化的状态来进行确定。
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3.发明申请公开(公告)号：US20190271638A1
公开(公告)日：2019-09-05
申请号：US16417999
申请日：2019-05-21
Applicant: FUJIFILM Corporation
Inventor： Kazuhiro HIROTA
Abstract: Provided are a photoacoustic image generation apparatus, a photoacoustic image generation method, and a photoacoustic image generation program that can perform a more appropriate reconstruction process regardless of the type of probe, without causing a reduction in the speed of an arithmetic process. It is identified whether a probe that detects photoacoustic waves and outputs a photoacoustic wave detection signal is a probe in which detection elements are arranged by a coordinate system using polar coordinates or a probe in which detection elements are arranged by a rectangular coordinate system. In a case in which the probe is identified as the probe in which the detection elements are arranged by the coordinate system using the polar coordinates, a time domain reconstruction process is selected to generate a photoacoustic image.
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公开(公告)号：US20190257795A1
公开(公告)日：2019-08-22
申请号：US16400848
申请日：2019-05-01
Applicant: FUJIFILM Corporation
Inventor： Kazuhiro HIROTA , Keiji TSUBOTA
Abstract: There is provided a photoacoustic measurement apparatus capable of appropriately detecting a single failure state even in the single failure state so that it is possible to prevent an operation in the single failure state from continuing. There are included: a laser light source having a flash lamp and a laser medium; an excitation light source power supply having a capacitor for supplying a charge voltage to the flash lamp, a charging circuit for charging the capacitor, a first voltage dividing circuit and a second voltage dividing circuit for dividing a voltage charged in the capacitor, and a failure detection circuit that detects a failure by comparing voltages obtained by voltage division of the first voltage dividing circuit and the second voltage dividing circuit; and an ultrasound probe that detects photoacoustic waves generated inside a subject by emission of light emitted from the laser light source to the subject.
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公开(公告)号：US20180235477A1
公开(公告)日：2018-08-23
申请号：US15958210
申请日：2018-04-20
Applicant: FUJIFILM Corporation
Inventor： Kazuhiro HIROTA , Kazuhiro TSUJITA
CPC classification number: A61B5/0095 , A61B8/4416 , A61B8/463
Abstract: A photoacoustic imaging method is provided that can prevent the surface of the subject from appearing in an image when a part to be observed at a position deeper than the surface of the subject is imaged. The photoacoustic imaging device includes a unit for outputting pulsed light toward the subject, and generating photoacoustic data by detecting photoacoustic waves emitted from the subject exposed to the light. The photoacoustic imaging device also includes a region detection unit that detects a near-surface region of the subject based on the photoacoustic wave detection signals, and a correcting unit that attenuates (which encompasses removing) information of the near-surface region found by the region detection unit when the part to be observed is displayed.
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Patent Agency Ranking
公开(公告)号：US20160150974A1
公开(公告)日：2016-06-02
申请号：US15019354
申请日：2016-02-09
Applicant: FUJIFILM Corporation
Inventor： Kazuhiro HIROTA
IPC: A61B5/00
CPC classification number: A61B5/0095 , A61B5/0037 , A61B5/489 , A61B5/7425 , F04C2270/041
Abstract: A photoacoustic imaging method that enables photoacoustic images to be displayed at high speed is provided. The photoacoustic imaging method scans a subject with a light beam, detects acoustic waves generated within the subject due to the scanning of light to obtain acoustic wave detected signals, and generates volume data that represent three dimensional photoacoustic images of the subject based on the acoustic wave detected signals. Photoacoustic projection images projected in the direction of irradiation depth of the light are generated, prior to the volume data being generated and concurrently with the scanning of the light. The photoacoustic projection images are displayed.
Abstract translation: 提供了一种使声光图像高速显示的光声成像方法。 光声成像方法用光束扫描对象，检测由于光的扫描而在对象内产生的声波，以获得声波检测信号，并且基于声波生成表示对象的三维光声图像的体数据 检测信号。 在产生体积数据并与光的扫描同时产生在光照射深度方向上投射的光声投影图像。 显示光电投影图像。
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公开(公告)号：US20140202247A1
公开(公告)日：2014-07-24
申请号：US14226470
申请日：2014-03-26
Applicant: FUJIFILM Corporation
Inventor： Tadashi KASAMATSU , Kazuhiro HIROTA
CPC classification number: G01N29/2418 , A61B5/0095 , A61B2562/0233 , G01N29/46 , G01N2291/02475 , H01S3/08027 , H01S3/092 , H01S3/105 , H01S3/106 , H01S3/121 , H01S3/123
Abstract: A laser source unit obtains Q switch pulse oscillation with a simple structure while continuously switching a plurality of wavelengths. A laser source unit emits pulsed laser beams with a plurality of different wavelengths. A flash lamp radiates excitation light to a laser rod. A pair of mirrors face each other with the laser rod interposed therebetween. The pair of mirrors form an optical resonator. Wavelength selection unit controls the wavelength of light which resonates in the optical resonator to any one of a plurality of wavelengths to be emitted by the laser source unit. Driving unit drives the wavelength selection unit such that the optical resonator performs the Q switch pulse oscillation.
Abstract translation: 激光源单元在连续切换多个波长的同时以简单的结构获得Q开关脉冲振荡。 激光源单元发射具有多个不同波长的脉冲激光束。 闪光灯将激发光照射到激光棒。 一对镜子彼此面对，激光棒插入其间。 该对镜形成光学谐振器。 波长选择单元将在光学谐振器中谐振的光的波长控制为由激光源单元发射的多个波长中的任何一个。 驱动单元驱动波长选择单元，使得光谐振器执行Q开关脉冲振荡。
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公开(公告)号：US20140005556A1
公开(公告)日：2014-01-02
申请号：US14017411
申请日：2013-09-04
Applicant: FUJIFILM Corporation
Inventor： Kazuhiro HIROTA , Kazuhiro TSUJITA , Kaku IRISAWA
CPC classification number: A61B5/0095 , A61B8/4444 , A61B8/5261
Abstract: A probe includes an acoustic wave transmitting section that transmits acoustic waves toward a subject, a light irradiating section that irradiates a light beam guided from a light source, and an acoustic wave detecting section that detects photoacoustic waves generated within the subject due to irradiation of the light beam onto the subject and reflected acoustic waves of the acoustic waves transmitted into the subject. In addition, a mode switching switch is provided on the probe. A control means switches operating modes between an operating mode in which the acoustic wave detecting section detects at least photoacoustic waves, and an operating mode in which the acoustic wave detecting section does not detect photoacoustic waves.
Abstract translation: 探针包括：朝向被检体发射声波的声波发送部，照射从光源引导的光束的光照射部;以及声波检测部，其检测由于受光体的照射而在被检体内产生的光声 将光束照射到被摄体上，并将反射的声波传播到被检体内。 另外，在探头上设置模式切换开关。 控制装置在其中声波检测部分至少检测到光声波的操作模式与声波检测部分不检测光声波的操作模式之间切换操作模式。
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公开(公告)号：US20200099191A1
公开(公告)日：2020-03-26
申请号：US16698157
申请日：2019-11-27
Applicant: FUJIFILM Corporation
Inventor： Kazuhiro HIROTA , Katsuaki KAMOIKE
IPC: H01S3/067
Abstract: There is provided a photoacoustic measurement apparatus including a laser light source unit that has a flash lamp for emitting excitation light and a laser rod for emitting laser light in response to incidence of the excitation light, an excitation light source power supply unit that has a capacitor bank for supplying a voltage to the flash lamp, an IGBT for controlling an output of the voltage charged in the capacitor bank to the flash lamp, a discharge control circuit for generating a driving pulse for driving the IGBT, and a pulse width limiting circuit for limiting a pulse width of the driving pulse output from the discharge control circuit, the pulse width limiting circuit being formed of a passive element, and a photoacoustic wave detection unit that detects photoacoustic waves generated inside a subject by emission of light emitted from the laser light source unit to the subject.
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公开(公告)号：US20190021603A1
公开(公告)日：2019-01-24
申请号：US16142297
申请日：2018-09-26
Applicant: FUJIFILM Corporation
Inventor： Hiroyasu ISHII , Kazuhiro HIROTA
Abstract: In a laser device that emits pulsed laser light by emitting excitation light to a laser medium in a state in which a first voltage is applied to a Q switch and changing the voltage applied to the Q switch from a first voltage to a second voltage after the emission of the excitation light, the application start timing of the first voltage during a normal operation is set to a timing at which the intensity of the pulsed laser light periodically changing due to the vibration of the Q switch is maximized.
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