公开(公告)号：US11083376B2

公开(公告)日：2021-08-10

申请号：US15901041

申请日：2018-02-21

Applicant: FUJIFILM Corporation

Inventor： Atsushi Hashimoto ,  Kaku Irisawa ,  Atsushi Osawa ,  Tomoki Inoue

IPC: A61B5/00

Abstract: A photoacoustic measurement device reducing artifacts caused by photoacoustic waves generated at a surface portion of a subject on which measurement light is incident, and a signal processing method thereof are obtained. A photoacoustic measurement device includes region discrimination unit that discriminates an artifact generation region and an artifact non-generation region in a photoacoustic image on the basis of a positional relationship between a light emitting portion and an acoustic wave detection portion, and filter unit that performs a first filtering process on a first photoacoustic wave detection signal corresponding to a photoacoustic image of the artifact non-generation region and performs a second filtering process on a second photoacoustic wave detection signal corresponding to a photoacoustic image of the artifact generation region. The second filtering process includes further reducing the photoacoustic wave detection signal in a frequency range lower than a predetermined frequency as compared with the first filtering process.

公开(公告)号：US10028663B2

公开(公告)日：2018-07-24

申请号：US15689390

申请日：2017-08-29

Applicant: FUJIFILM Corporation

Inventor： Atsushi Hashimoto ,  Kaku Irisawa

IPC: G01N21/00 ,  A61B5/00 ,  A61B8/00 ,  G01N29/24 ,  A61B8/14 ,  A61B8/08

Abstract: In a photoacoustic measurement apparatus and a probe, artifacts due to photoacoustic waves generated in a surface portion of a subject are reduced without increasing the repetition period of photoacoustic measurement. A measurement light emitting unit emits measurement light toward a subject. An acoustic wave detector detects photoacoustic waves generated within the subject due to the measurement light. A correction light source emits correction light toward the subject. A light intensity detector detects reflected light generated by reflection of the correction light, which is emitted toward the subject, from the subject. In a probe, the correction light source and the light intensity detector are disposed between the measurement light emitting unit and the acoustic wave detector.

公开(公告)号：USD787352S1

公开(公告)日：2017-05-23

申请号：US29561287

申请日：2016-04-14

Applicant: FUJIFILM Corporation

Designer： Atsushi Hashimoto ,  Kaku Irisawa

公开(公告)号：US08767916B2

公开(公告)日：2014-07-01

申请号：US14057836

申请日：2013-10-18

Applicant: FUJIFILM Corporation

Inventor： Atsushi Hashimoto ,  Takuji Tada ,  Dai Murakoshi

IPC: G01N23/04

CPC classification number: A61B6/484 ,  A61B6/4035 ,  A61B6/4291

Abstract: An X-ray imaging apparatus comprises a first grid, a second grid, and an X-ray image detector. The first grid passes X-rays emitted from an X-ray source and produces a first periodic pattern image. The second grid opposes the first grid. The second grid partly blocks the first periodic pattern image and produces a second periodic pattern image with moiré fringes. The X-ray image detector detects the second periodic pattern image and produces image data. The X-ray image detector has pixels arranged in two dimensions in X and Y directions. The M pixels arranged in the Y direction form one group. The group is shifted in the Y direction by the number of the pixels less than M each time. A phase of an intensity modulated signal, composed of pixel values of the pixels in the each shifted group, is calculated. Thereby a differential phase image is produced.

Abstract translation: X射线成像装置包括第一格栅，第二格栅和X射线图像检测器。 第一格栅通过从X射线源发射的X射线并产生第一周期性图案图像。 第二个网格反对第一个网格。 第二格栅部分地阻挡第一周期性图案图像，并产生具有莫尔条纹的第二周期性图案图像。 X射线图像检测器检测第二周期性图案图像并产生图像数据。 X射线图像检测器具有在X和Y方向上二维排列的像素。 以Y方向排列的M个像素形成一组。 该组在Y方向移动每次小于M的像素数。 计算由每个移位组中的像素的像素值组成的强度调制信号的相位。 从而产生差分相位图像。