公开(公告)号：DE69632437D1

公开(公告)日：2004-06-17

申请号：DE69632437

申请日：1996-08-22

Applicant: HAMAMATSU PHOTONICS KK

Inventor： URAKAMI TSUNEYUKI ,  MIWA MITSUHARU ,  YAMASHITA YUTAKA ,  TSUCHIYA YUTAKA

IPC: A61B5/00 ,  G01N21/27 ,  G01J1/42

Abstract: An optical measuring method comprising: a first step of, in a first state in which a measured object (45) is placed in a predetermined place (40), emitting probe light from a light source (10) onto the measured object (45) and detecting the probe light transmitted or reflected by said measured object by means of light detecting means (16) to obtain a first mean time delay of said probe light; a second step of, in a second state in which the measured object (45) is not placed in said predetermined place (40), emitting the probe light from said light source (10) to the predetermined place (40) and detecting the probe light passing through said predetermined place without intervention of said measured object (45) by said light detecting means (16) to obtain a second mean time delay; and a third step of subtracting said second mean time delay from said first mean time delay to obtain a true mean time delay.

公开(公告)号：DE69417473D1

公开(公告)日：1999-05-06

申请号：DE69417473

申请日：1994-06-09

Applicant: HAMAMATSU PHOTONICS KK

Inventor： ODA MOTOKI ,  YAMASHITA YUTAKA ,  OHTA KAZUYOSHI ,  TAMURA MAMORU ,  NISHIMURA GORO

IPC: A61B5/145 ,  A61B5/00 ,  A61B5/1455 ,  G01N21/17 ,  G01N21/27 ,  G01N21/49 ,  G01N21/47

Abstract: An optical pulse emitted from an optical pulse source is incident on a living tissue and is input to an optical sampling unit. The optical sampling unit detects intensities f of optical pulses detected at the respective timings of trigger signals input from a delay unit. A first accumulator calculates products t.f of the intensities f and the delay times t from the delay unit. A second accumulator accumulates the light intensities f. An average optical pathlength calculating unit calculates an average optical pathlength using the accumulation results as the products t.f and the intensities f. An SO2 value calculating unit calculates a ratio of VHbO2 to VHb from the average optical pathlength to calculate an SO2 value.

公开(公告)号：AU4058999A

公开(公告)日：2000-12-28

申请号：AU4058999

申请日：1999-06-03

Applicant: HAMAMATSU PHOTONICS KK

Inventor： OHMAE ETSUKO ,  UEDA YUKIO ,  YAMASHITA YUTAKA

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

公开(公告)号：DE69943188D1

公开(公告)日：2011-03-24

申请号：DE69943188

申请日：1999-06-03

Applicant: HAMAMATSU PHOTONICS KK

Inventor： OHMAE ETSUKO ,  UEDA YUKIO ,  YAMASHITA YUTAKA

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

公开(公告)号：DE69737544T2

公开(公告)日：2007-12-13

申请号：DE69737544

申请日：1997-10-03

Applicant: HAMAMATSU PHOTONICS KK

Inventor： TSUCHIYA YUTAKA ,  YAMASHITA YUTAKA

IPC: A61B5/00 ,  G01N21/27 ,  G01N21/25 ,  G01N21/49

Abstract: A measuring apparatus of absorption information of scattering medium, comprising a light source for generating pulsed light, a light incidence section for making the pulsed light incident to a scattering medium, a light receiving section for receiving the light having propagated inside the measured object, a signal detecting section for temporally cutting a portion out of a light signal obtained by the light receiving section to acquire a measurement signal corresponding to the cut-out signal, a first arithmetic section for performing a measurement for acquiring measurement signals respectively at plural different timings or the like and for deriving a time integration value and a mean optical pathlength for each of the plural measurement signals obtained, and a second arithmetic section for calculating a change amount of concentration of an absorptive constituent, based on a predetermined relation among plural time integration values, plural mean optical pathlengths, an absorption coefficient per unit concentration of the absorptive constituent, and the change amount of concentration of the absorptive constituent.

公开(公告)号：DE69632437T2

公开(公告)日：2005-05-12

申请号：DE69632437

申请日：1996-08-22

Applicant: HAMAMATSU PHOTONICS KK

Inventor： URAKAMI TSUNEYUKI ,  MIWA MITSUHARU ,  YAMASHITA YUTAKA ,  TSUCHIYA YUTAKA

IPC: A61B5/00 ,  G01N21/27 ,  G01J1/42

Abstract: An optical measuring method comprising: a first step of, in a first state in which a measured object (45) is placed in a predetermined place (40), emitting probe light from a light source (10) onto the measured object (45) and detecting the probe light transmitted or reflected by said measured object by means of light detecting means (16) to obtain a first mean time delay of said probe light; a second step of, in a second state in which the measured object (45) is not placed in said predetermined place (40), emitting the probe light from said light source (10) to the predetermined place (40) and detecting the probe light passing through said predetermined place without intervention of said measured object (45) by said light detecting means (16) to obtain a second mean time delay; and a third step of subtracting said second mean time delay from said first mean time delay to obtain a true mean time delay.

公开(公告)号：GB2228314B

公开(公告)日：1992-11-18

申请号：GB8903518

申请日：1989-02-16

Applicant: HAMAMATSU PHOTONICS KK

Inventor： YAMASHITA TAKAJI ,  YAMASHITA YUTAKA

IPC: A61B5/00 ,  G01N21/47

公开(公告)号：DE602007013058D1

公开(公告)日：2011-04-21

申请号：DE602007013058

申请日：2007-07-17

Applicant: HAMAMATSU PHOTONICS KK

Inventor： YAMASHITA DAISUKE ,  YAMASHITA YUTAKA ,  YAMAUCHI TOYOHIKO ,  OKADA HIROYUKI

IPC: A61B18/20 ,  A61B17/00 ,  A61B17/22 ,  A61B18/24 ,  A61B18/26 ,  A61N5/06 ,  A61N5/067 ,  G01B11/16 ,  G01H9/00 ,  G01L1/24 ,  G02B6/02

公开(公告)号：DE102017216583A1

公开(公告)日：2018-03-29

申请号：DE102017216583

申请日：2017-09-19

Applicant: HAMAMATSU PHOTONICS KK

Inventor： YAMASHITA DAISUKE ,  YAMASHITA YUTAKA ,  UEDA YUKIO ,  TAMAOKI YOSHINORI

IPC: A61B18/26 ,  A61B17/22 ,  A61B17/94

Abstract: Eine Vorrichtung zum Abstrahlen von gepulstem Licht in Richtung von einem Thrombus in einem Blutgefäß, wobei die Überwachungsvorrichtung umfasst eine Lichtausgabeeinheit zum Ausgeben von Überwachungslicht, das in das Blutgefäß ausgestrahlt werden soll, eine Lichterfassungseinheit zum Erfassen von Rückkehrlicht des Überwachungslichts und zum Ausgeben eines Erfassungssignals, und eine Auswerteeinheit zum Erlangen einer Zeit-Wellenform, die eine Änderung der intensität des Rückkehrlichts über die Zeit ist, auf der Basis des Erfassungssignals, wobei die Auswerteeinheit einen Parameter auf der Basis der Zeit-Wellenform erhält und eine Reaktion in dem Blutgefäß gemäß der Strahlung des gepulsten Lichts auf Basis des Parameters auswertet.

公开(公告)号：GB2522558A

公开(公告)日：2015-07-29

申请号：GB201501343

申请日：2013-06-27

Applicant: UNIV TSUKUBA ,  HAMAMATSU PHOTONICS KK

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

IPC: A61B5/00

Abstract: This measurement data selection method: treats a vector comprising measurement data y1 to yN1 obtained for each combination among a plurality of light exit positions, a plurality of light detection positions, and a plurality of time slices in a time-resolved waveform as (1); treats a vector, which has pixel values of learning-use image data prepared beforehand as examples of internal image data as components, as x; and treats a system matrix for calculating the internal image data on the basis of the measurement data y1 to yN1 as A1. Then, a vector y which satisfies the following conditional expressions (2) and (3) or which satisfies the following conditional expression (4) is obtained by back-calculation. When measuring a subject, the internal image data are created using only measurement data corresponding to non-zero components of the vector y.