Hamamatsu-photonics K.k.

University of Tsukuba

Kenji Yoshimoto

Yukio Ueda

Yutaka Yamashita

Daisuke Yamashita

Toshihiko Suzuki

Hiroyuki Kudo

Etsuko Yamaki

Hatsuko Nasu

Harumi Sakahara

Etsuko Ohmae

Hiroyuki Ogura

Naoya Saito

Hiroko Wada

Kazuyoshi Ohta

Hiroaki Suzuki

The present invention relates to the phantom comprises water, an oil, an emulsifier and an oil coagulating agent.

Phantom, method for producing same, and kit for making phantom

The present invention relates to the phantom comprises water, an oil, an emulsifier and a water coagulating agent, and having a scattering coefficient of 5 to 20 cmat a wavelength of 750 to 1000 nm.

Phantom and method for producing same

A phantom design method includes a correction step and a calculation step. In the correction step, an absorption spectrum of a target of spectroscopic measurement by a near infrared spectrometer is corrected based on a refractive index of the target and a refractive index of a resin used as a base material of a phantom to generate a corrected absorption spectrum. In the calculation step, based on an absorption spectrum of the resin and an absorption spectrum of each of N types of dyes, a concentration of each of the N types of dyes to be contained in the base material is calculated such that an absorption spectrum of the phantom constituted by the base material containing the N types of dyes approximates the corrected absorption spectrum in a predetermined wavelength range of a near infrared region.

Simulation sample design method, simulation sample manufacturing method, simulation sample design device, program, and recording medium

A mammography device is disclosed. The mammography device includes a container configured to surround the breast and a plurality of optical fibers attached to be directed inward in the container and configured to perform radiation and detection of light. The container has a base member having an opening, a plurality of annular members continuously disposed to come in communication with the opening, and a bottom member disposed inside the annular member spaced the farthest distance from the base member. The annular members and the bottom member are configured to relatively displace the adjacent annular member on the side of the base member or the base member in a communication direction. Some of the plurality of optical fibers is attached to the plurality of annular members.

Mammography device

A breast measurement apparatus comprises a receptacle for surrounding a breast; a plurality of optical fibers for irradiating the breast with examination light and detecting transmitted scattered light from the breast; an inner image generation unit for generating an optical CT image concerning the breast according to a detection signal of the transmitted scattered light; an ultrasonic probe, arranged so as to face the inside of the receptacle, for scanning the breast with an ultrasonic wave and receiving a reflected wave from the breast; an image generation unit for generating an ultrasonic image concerning the breast according to the reflected wave; and a mechanism for injecting and discharging a liquid interface agent into and from the inside of the receptacle.

Breast measurement apparatus

In measurement data selection, when a vector composed of measurement data obtained for respective combinations of light emitting positions, light detection positions, and resolving times in a time-resolved waveform is given as y, a vector in which pixel values of learning image data are components is given as x, and a system matrix for calculating internal image data from the measurement data is given as A, the vector y which meets the conditional expressions (2) and (3)min&#x2225;&#x2003;&#x2003;(2),&#x2225;&#x2266;&#x3b5;&#x2003;&#x2003;(3)or the conditional expression (4)min(&#x2225;)&#x2003;&#x2003;(4)is determined, and upon measurement of a subject, only the measurement data corresponding to nonzero components of the vector y is used to prepare the internal image data.

Measurement data selection method for biometric device, light exit position determination method for biometric device, and biometric device

The bioinstrumentation apparatus includes a light irradiation unit irradiating a measurement region with light, a light detection unit detecting diffused light from the measurement region, and a computing unit generating a reconstructed image for the interior of the measurement region. The computing unit calculates J coefficients wset 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(where k is an integer from 1 to N, N is the number of times of iterative computation, xis a pixel value of the jth pixel on the kth iterative computation, and dis an update amount of the jth pixel on the kth iterative computation) to generate the reconstructed image.

Biometric apparatus and image-generating method

In a method for measuring a scattering medium, pulse light with a predetermined wavelength is made incident on a scattering medium which is a measurement object and a scattering medium for reference, the pulse light transmitted inside the scattering media is detected to acquire a light detection signal, the measurement waveform is acquired on the basis of the detected light detection signal, a parameter of a function showing the theoretical waveform of the measurement object is specified in such a manner that the result of convolution operation on the theoretical waveform of the measurement object and the measurement waveform of the reference is made equal to the result of convolution operation on the theoretical waveform of the reference and the measurement waveform of the measurement object, and calculation is made for the internal information of the scattering medium on the basis of the theoretical waveform shown by the function.

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Hamamatsu, Japan

Kenji Yoshimoto