公开(公告)号：DE112013003284T5

公开(公告)日：2015-04-30

申请号：DE112013003284

申请日：2013-06-27

Applicant: HAMAMATSU PHOTONICS KK ,  UNIV TSUKUBA

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

IPC: A61B10/00 ,  G01N21/17

Abstract: Messdaten-Auswahlverfahren für eine biometrische Vorrichtung, Lichtaustrittspositions-Ermittlungsverfahren für eine biometrische Vorrichtung und biometrische Vorrichtung Wenn bei dem Messdaten-Auswahlverfahren ein Vektor, der sich aus Messdaten y1 bis yN1 zusammensetzt, die für entsprechende Kombinationen einer Vielzahl von Lichtemissionspositionen, einer Vielzahl von Lichterfassungspositionen und einer Vielzahl von Auflösungszeiten in einer zeitaufgelösten Wellenform gewonnen worden sind, gegeben ist durch [Formel 1]ein Vektor, bei dem Bildpunktwerte von Lernbilddaten, die im Voraus als Beispiel für Innenbilddaten bereitgestellt werden, Komponenten sind, durch x gegeben ist und eine Systemmatrix zum Berechnen der Innenbilddaten aus den Messdaten y1 bis yN1 durch A1 gegeben ist, wird der Vektor y, der die folgenden bedingten Ausdrücke (2) und (3) erfüllt [Formel 2] min∥y∥00 (2)[Formel 3] ∥x – A1 Ty∥22 ≤ &egr;2 (3)oder der den folgenden bedingten Ausdruck (4) erfüllt [Formel 4] min(∥y∥00 + &bgr;∥x – A1 Ty∥22 )(4) ...

公开(公告)号：DE69740101D1

公开(公告)日：2011-02-24

申请号：DE69740101

申请日：1997-10-03

Applicant: HAMAMATSU PHOTONICS KK

Inventor： TSUCHIYA YUTAKA ,  YAMASHITA YUTAKA

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

公开(公告)号：DE69737544D1

公开(公告)日：2007-05-16

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：DE69417473T2

公开(公告)日：1999-09-30

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：GB2228314A

公开(公告)日：1990-08-22

申请号：GB8903518

申请日：1989-02-16

Applicant: HAMAMATSU PHOTONICS KK

Inventor： YAMASHITA TAKAJI ,  YAMASHITA YUTAKA

IPC: A61B5/00 ,  G01N21/47

Abstract: Apparatus for examining an object 13 of interest by transmission photometry comprises a plurality of sequentially activated light sources P1 - Pn arranged to direct into the object at respective incidence sites via optical fibres 11. Light transmitted into and scattered within the object is detected at a plurality of output sites on the object, the signals from the sites being combined so as to determine optical absorption data at the incidence site then being addressed. As shown the light from the output sites is combined in a fibre optic arrangement 12 and incident on a common detector 14, but each output site could have a respective detector, the signals therefrom then being added. Light of different wavelengths may be used e.g. to monitor oxygen/glucose in the brain.

公开(公告)号：EP2565622A4

公开(公告)日：2017-10-25

申请号：EP11774749

申请日：2011-03-29

Applicant: HAMAMATSU PHOTONICS KK

Inventor： YAMAKI ETSUKO ,  YAMASHITA YUTAKA ,  ODA MOTOKI ,  SUZUKI HIROAKI ,  SUZUKI TOSHIHIKO ,  WATANABE HIROSHI ,  KOGA SHUNSAKU

IPC: G01N21/359 ,  A61B5/145 ,  A61B5/1455 ,  G01N21/17 ,  G01N21/35 ,  G01N21/3577 ,  G01N21/49

CPC classification number: G01N21/17 ,  A61B5/14546 ,  A61B5/1455 ,  A61B2562/0242 ,  G01N21/359 ,  G01N21/49

Abstract: Light P of a predetermined wavelength irradiates one light incident position I set on the surface Ba of a scattering-absorption body B. The light P that propagates through the interior of the scattering-absorption body B is detected at one light detecting position D set on the surface Ba of the scattering-absorption body B, to yield a light detection signal. On the basis of this light detection signal, a temporal profile of the light intensity of the detected light is acquired, and on the basis of the temporal profile, an mean optical path length L of the light P in the interior of the scattering-absorption body B and information relating to the amount of substance to be measured in a region to be measured B1 are calculated. The information relating to the amount of substance to be measured is corrected on the basis of the mean optical path length L, such that the longer the mean optical path length L, the greater the amount of substance to be measured is. The method allows obtaining measurement results, exhibiting no influence of intervening tissue, to be obtained in accordance with a simple method.

公开(公告)号：EP2204645A4

公开(公告)日：2012-12-12

申请号：EP08842020

申请日：2008-10-10

Applicant: HAMAMATSU PHOTONICS KK

Inventor： UEDA YUKIO ,  YAMASHITA YUTAKA

IPC: G01N21/17 ,  A61B5/00 ,  A61B10/00 ,  G01N21/47

CPC classification number: G01N21/4795 ,  A61B5/0091 ,  A61B5/4312 ,  G01N2201/0846

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.

公开(公告)号：EP1944054A4

公开(公告)日：2012-06-13

申请号：EP06822201

申请日：2006-10-25

Applicant: HAMAMATSU PHOTONICS KK ,  NAKAYAMA TEIJI

Inventor： NAKAYAMA TEIJI ,  OKADA HIROYUKI ,  UMEMURA KAZUO ,  YAMASHITA DAISUKE ,  YAMASHITA YUTAKA ,  KOBAYASHI KATSUHIRO

IPC: A61M39/00 ,  A61B18/20 ,  A61B18/24

CPC classification number: A61B18/24 ,  A61B90/39 ,  A61M5/007 ,  A61M2025/0037

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.