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    11.
    发明专利
    未知

    公开(公告)号：DE69525219D1

    公开(公告)日：2002-03-14

    申请号：DE69525219

    申请日：1995-11-07

    Applicant: HAMAMATSU PHOTONICS KK

    Inventor： MIWA MITSUHARU ,  TSUCHIYA YUTAKA ,  UEDA YUKIO

    IPC: G01N21/27 ,  A61B5/00 ,  A61B5/145 ,  A61B5/1455 ,  A61B10/00 ,  G01N21/49 ,  G01N21/47

    Abstract: A method for mesuring a scattering property and an absorption property in a scattering medium according to the present invention comprises: (a) a first step of letting pulsed measuring light having a predetermined wavelength enter a scattering medium; (b) a second step of performing time-resolved measurement of the measuring light having diffusively propagated in the scattering medium at light detection positions corresponding to a plurality of combinations, each comprised of a light incidence position on the scattering medium where the measuring light was let to enter the scattering medium in the first step and a light detection position on the scattering medium where the measuring light is detected, having different incidence-detection distances between the light incidence position and the light detection position; (c) a third step of calculating a plurality of mean optical pathlengths of the measuring light corresponding to the plurality of incidence-detection distances, based on results of the time-resolved measurement measured in the second step; and (d) a fourth step of calculating a scattering coefficient and an absorption coefficient in the scattering medium, based on a plurality of simultaneous relations consisting of calculation values of the plurality of mean optical pathlengths corresponding to the incidence-detection distances, calculated in the third step, and a theoretical equation of the mean optical pathlengths derived in correspondence to light diffusion properties comprising a scattering property and an absorption property in diffusive propagation paths in the scattering medium.

    DEVICE AND METHOD FOR MEASURING SCATTERING ABSORBER
    13.
    发明公开
    DEVICE AND METHOD FOR MEASURING SCATTERING ABSORBER 有权
    装置和方法用于测量镜片吸收

    公开(公告)号：EP1653218A4

    公开(公告)日：2009-01-21

    申请号：EP04770890

    申请日：2004-07-23

    Applicant: HAMAMATSU PHOTONICS KK

    Inventor： YAMANAKA TAKESHI ,  UEDA YUKIO ,  YAMASHITA YUTAKA

    IPC: G01N21/17 ,  G01N21/35 ,  A61B5/00 ,  A61B5/145 ,  A61B5/1455 ,  A61B5/15 ,  A61B10/00 ,  G01N21/359 ,  G01N21/49

    CPC classification number: G01N21/4795 ,  A61B5/14553 ,  A61B2562/0233 ,  A61B2562/046 ,  G01N21/49

    Abstract: A device for measuring a scattering absorber comprises: a measuring module (1) having an irradiation probe (11) and detection probes (61, 71); and a measuring module (2) having an irradiation probe (21) and detection probes (81, 91). For a common light source for the irradiation probes (11, 21), i.e. a pulse light source (30), a light delay unit (22) is provided between the light source (30) and the irradiation probe (21) so tat a pulse light is irradiated sequentially from the irradiation probes (11, 21). A trigger circuit (50) designates the pulse light irradiation timing of the light source (30) and the light detection timing of signal processing circuits (62-92) in synchronism with the irradiation timing. Thus, it is possible to realize a device and a method for measuring a scattering absorber capable of suppressing crosstalk between channels with no spatial limitation.

    OPTICAL CT DEVICE AND METHOD OF IMAGE REFORMATION
    15.
    发明公开
    OPTICAL CT DEVICE AND METHOD OF IMAGE REFORMATION 有权
    光CT设备和方法恢复IMAGES OF

    公开(公告)号：EP1207385A4

    公开(公告)日：2004-11-24

    申请号：EP99923877

    申请日：1999-06-03

    Applicant: HAMAMATSU PHOTONICS KK

    Inventor： OHMAE ETSUKO ,  UEDA YUKIO ,  YAMASHITA YUTAKA

    IPC: A61B5/00 ,  A61B10/00 ,  G01N21/17

    CPC classification number: A61B5/0091 ,  A61B5/415 ,  A61B5/418 ,  A61B5/4312 ,  A61B2562/146 ,  B29K2105/06 ,  B29L2031/3041

    Abstract: An optical CT device (10) chiefly comprises a container (12) filled with optical interface material (20), a projector including a light source (22) and an optical switch (24) to project light into the container (12), a photodetector including a photodetector element (30) and a shutter (32) to detect the light through the container (12), and a processor/controller (14) for computing the spatial distribution of an absorption coefficient. The processor/controller (14) determines the spatial distribution of the quantity of feature concerning an optical characteristic of an object (200) for measurement based on the comparison between the light intensity signal from the detector (30) with the container (10) filled with the optical interface material (20) and such a signal from the detector (30) with the optical interface material (20) replaced in part by the object (200) for measurement.

    BIOMETRIC APPARATUS AND IMAGE-GENERATING METHOD
    19.
    发明公开
    BIOMETRIC APPARATUS AND IMAGE-GENERATING METHOD 有权
    生物识别设备和成像及其方法

    公开(公告)号：EP2730231A4

    公开(公告)日：2015-03-25

    申请号：EP12807701

    申请日：2012-06-28

    Applicant: HAMAMATSU PHOTONICS KK

    Inventor： KUDO HIROYUKI ,  SAITO NAOYA ,  UEDA YUKIO ,  YOSHIMOTO KENJI ,  YAMASHITA YUTAKA

    IPC: A61B5/00 ,  A61B6/00 ,  A61B6/03 ,  A61B8/15 ,  A61B10/00 ,  G01N21/17 ,  G01N21/47 ,  G06T11/00

    CPC classification number: A61B5/7203 ,  A61B5/0073 ,  A61B5/0082 ,  A61B6/5247 ,  A61B8/15 ,  A61B8/5207 ,  A61B10/0041 ,  G01N21/4795 ,  G06T11/006

    Abstract: The bioinstrumentation apparatus 10 includes a light irradiation unit irradiating a measurement region B with light, a light detection unit detecting diffused light from the measurement region, and a computing unit 14 generating a reconstructed image for the interior of the measurement region. The computing unit 14 calculates J coefficients w j set for every pixel of the reconstructed image and more than 0 and not more than 1 (where J is the number of pixels of the reconstructed image) and carries out successive approximation computation by the following iterative formula x j k + 1 = x j k + w j �¢ d j k (where k is an integer from 1 to N, N is the number of times of iterative computation, x j (k) is a pixel value of the jth pixel on the kth iterative computation, and d j (k) is an update amount of the jth pixel on the kth iterative computation) to generate the reconstructed image. Thereby, there are provided a bioinstrumentation apparatus and an image generating method capable of suppressing a difference in spatial resolution and noise characteristics depending on a position inside the measurement region to generate an image which is uniform to a greater extent.

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