Fuji Photo Film Company, Limited

Fujifilm Corporation

Toshitaka Agano

Nobuyoshi Nakajima

Shinji Imai

Takao Kuwabara

Yasuhiko Goto

Ryousuke Furue

Yasunori Ohta

Ichirou Miyagawa

Masaharu Ogawa

Yuji Oshikoshi

Haruyasu Nakatsugawa

Wataru Ito

Satoshi Arakawa

Takashi Shoji

Mitsuru Sawano

Kazuo Horikawa

Masaru Noguchi

Fumito Nariyuki

Dai Murakoshi

Makoto Ohgoda

Yoshihiko Okamoto

Nobutaka Fukai

Takashi Nakamura

Yoshihisa Usami

Akira Yamaguchi

Naoto Iwakiri

Hitoshi Shimizu

Kazuo Shimura

Kenji Takahashi

Koichi Okada

Nobuyuki Torisawa

Hisatoyo Kato

Shigeru Saotome

Hiroyuki Karasawa

Kenichi Nakagawa

Yuji Ohara

Yuuma Adachi

Tetsuya Kojima

Eiichi Asai

Yasuko Yahiro

Takuji Tada

Yoshimi Takasaki

Atsushi Fukuda

Ryosuke Furue

Yuichi Fuseda

Naoyuki Nishinou

An ultrasound diagnostic apparatus includes an ultrasound image producer which produces an ultrasound image from reception data based on a predetermined set sound speed, a reception data image producer which produces a reception data image representing a luminance image of an ultrasonic echo wavefront from the reception data corresponding to a predetermined range on at least one scan line in the ultrasound image, a sound speed determination unit configured to determine an optimum sound speed based on ultrasound images respectively produced by the ultrasound image producer while changing the predetermined set sound speed, and a controller which makes an ultrasound image for diagnosis produced by the ultrasound image producer and the reception data image produced by the reception data image producer be displayed simultaneously on a display unit based on the optimum sound speed determined by the sound speed determination unit.

Ultrasound diagnostic apparatus and method of producing ultrasound image

A radiation irradiation device is provided that includes: a metal target that emits bremsstrahlung X-rays as a radiation beam due to irradiation with an electron beam; a radiation shielding member that includes a slit-shaped radiation passage portion and that is disposed downstream of the metal target in the radiation beam emission direction and is disposed such that a portion of the radiation beam passes through the radiation passage portion and the radiation beam incident to regions other than the radiation passage portion is blocked; and an electron beam generating device that irradiates, onto the metal target, an electron beam such that a diameter at a generation point of the emitted radiation beam is smaller than a length of an entry portion of the radiation passage portion along a length direction of the entry portion.

Radiation irradiation device, radiation irradiation method and program storage medium

An X-ray imaging system is provided with an X-ray source (), first and second absorption gratings (), and a flat panel detector (FPD) (), and obtains a phase contrast image of an object H by performing imaging while moving the second absorption grating () in x direction relative to the first absorption grating (). The following mathematical expression is satisfied where p' denotes a period of a first pattern image at a position of the second absorption grating (), and p&#x2032; denotes a substantial grating pitch of the second absorption grating (), and Ddenotes a dimension, in the x-direction, of an X-ray imaging area of each pixel of the FPD (). Here, 'n' denotes a positive integer.&#xd7;(&#x2032;)/|&#x2032;|

Radiation imaging system

A radiographic image capturing apparatus includes a housing and a radiation detector accommodated in the housing. The radiation detector includes a scintillator for converting radiation into visible light and photodiodes for converting the visible light into electric charges. If it is assumed that a temperature-dependent rate of change in sensitivity of the scintillator with respect to the radiation is represented by A [%/K] and a temperature-dependent rate of change in sensitivity of the photodiodes with respect to visible light is represented by B [%/K], a scintillator and photodiodes are selected having temperature-dependent rates of change A and B that satisfy the following inequality (1):&#x2212;0.35 [%/[%/&#x2003;&#x2003;(1).

Radiation detector, method of manufacturing radiation detector, and radiographic image capturing apparatus incorporating radiation detector

A radiographic phase-contrast imaging apparatus obtains a phase-contrast image using two gratings including the first grating and the second grating. The first and second gratings are adapted to form a moire pattern when a periodic pattern image formed by the first grating is superimposed on the second grating. Based on the moire pattern detected by the radiographic image detector, image signals of the fringe images, which correspond to pixel groups located at different positions with respect to a predetermined direction, are obtained by obtaining image signals of pixels of each pixel group, which includes pixels arranged at predetermined intervals in the predetermined direction, as the image signal of each fringe image, where the predetermined direction is a direction parallel to or intersecting a period direction of the moire pattern other than a direction orthogonal to the period direction. Then, a phase-contrast image is generated based on the obtained fringe images.

Radiographic phase-contrast imaging apparatus

A radiation detector for detecting irradiated radiation that includes: a converting layer for converting radiation irradiated from a radiation source capable of irradiating radiation from two imaging directions, which are different from each other, into electric charges; and a plurality of pixel electrodes for collecting the converted charges. In the radiation detector, when at least one of the two imaging directions forms a specified angle &#x3b8; with respect to the direction that is orthogonal to the detector plane of the radiation detector, the thickness d of the converting layer and the sizes p of the pixel electrodes satisfy the condition: d&#xb7;tan &#x3b8;&#x3c;k&#xb7;p (k is a constant of 1 or less).

Radiographic imaging method, radiation detector and radiographic imaging apparatus

The present invention provides a radiographic imaging device that may image radiographic images with high sharpness while suppressing a drop in sensitivity. Namely, a radiation detector, in which a scintillator that generates light due to irradiation of radiation and a TFT substrate on which plural sensor portions configured including an organic photoelectric conversion material that generates electric charges by receiving light are disposed are sequentially layered, is positioned in such a way that radiation that has passed through a subject is made incident from the TFT substrate side.

Radiographic imaging device

An image reading method and apparatus for reading an image signal by exposure to reading light Lfrom a radiation solid-state detector, where radiation image information is recorded by exposure to recording light L, suppresses degradation of image quality such as the S/N ratio of a reproduced image, the degradation being caused by an effect of charges which are produced by exposure to excessive radiation or the like and remains in the radiation solid-state detector. In the image reading method and apparatus, a past image signal read regarding past image information recorded in the radiation solid-state detector in the past, and an elapsed time from a time of recording the past image information in the radiation solid-state detector to a time of recording the current radiation image information are stored. The current image signal is then corrected based on the recorded past image information and the elapsed time.

Image reading method and apparatus

A radiological imaging apparatus that includes a radiation source, a radiation detection section that detects radiation that passes through a subject, a signal detection section that detects signals from a plurality of signal generating sections disposed on the radiation detection section, a signal comparison section that compares the signals detected by the signal detection section, a positional relationship judgment section that makes a judgment as to whether a positional relationship between the radiation detection section and the radiation source is a predetermined positional relationship, a position control section that controls a position of at least one of the radiation source and the radiation detection section to maintain the positional relationship, a position control holding section that holds and fixes the radiation source and the radiation detection section, and a notification section that provides notification in a case where the positional relationship is not the predetermined positional relationship during holding.

Radiological imaging apparatus, radiological imaging method, and program

The display device has at least two set of maximum luminances including an image maximum luminance for displaying an image and an ordinary maximum luminance for displaying non-image information, the ordinary maximum luminance being lower than the image maximum luminance. The display device is capable of display at the appropriate brightness depending on the graphics to be displayed (whether it is an image or non-image information such as characters and menus) or in accordance with the operation done by the viewer (or operator) and which, when used as a monitor for medical diagnostic apparatus, allows for correct diagnosis by bright enough diagnostic images with good operability but without imposing any undue stress on the viewer's eyes.

Display device

A mammogram recording and read-out apparatus comprises a radiation image detector having a rectangular shape, a detector support section, and a breast support section. A support state of the detector support section is capable of being changed over between a first support state, in which the radiation image detector is supported in an orientation such that a short side of the radiation image detector stands facing the chest wall of an object, and a second support state, in which the radiation image detector is supported in an orientation such that a long side of the radiation image detector stands facing the chest wall of the object.

Mammogram recording and read-out apparatus

The image display method and apparatus display a monochromatic image with a color display device in which a unit pixel is composed of R, G and B cells and display the monochromatic image having a higher gradation resolution than reproduction performance of each of the R, G and B cells in the color display device. In the method and apparatus, input data of the monochromatic image to be displayed on the color display device is allotted to R, G and B data for the R, G and B cells, respectively and the R, G and B data of the monochromatic image obtained by allotment is output to the R, G and B cells for display on the color display device. The method and apparatus can display an increased number of gradations so that monochromatic images used in the medical field can be displayed in a sufficiently high definition to suit diagnostic purposes.

Image display method and an image display apparatus for implementing the method

Disclosed is a solid state detector which comprises a photo-conductive layer for generating charges upon irradiation of recording light and a substrate laminated to the photo-conductive layer, the substrate having a thermal expansion coefficient different from that of the photo-conductive layer. The solid state detector prevents deformation and breakdowns due to temperature changes of environments. Specifically, the solid state detector comprises a photo-conductive layer and a substrate laminated to the photo-conductive layer, the substrate having a thermal expansion coefficient smaller than that of the photo-conductive layer. In the solid state detector a deformation suppression layer, which has a thermal expansion coefficient smaller than that of the photo-conductive layer and suppresses deformation resulting from thermal expansion of the photo-conductive layer and the substrate, is laminated on a side of the photo-conductive layer opposite from the side of the substrate.

Solid state detector

In a radiation image reading method for reading image signals corresponding to radiation image information from a radiation solid-state detector in which the radiation image information is recorded by irradiation of a recording electromagnetic wave, correction of an offset and a gain in the image signals, which are attributable to a dark current of the radiation solid-state detector, is performed more accurately and easily. A correction pixel region, in which a light-shielding memberis provided so as to be adjacent to respective read pixels, and a correcting meanscorrects an image signal corresponding to the read pixel based on a correction region signal corresponding to the correction pixel region adjacent to the read pixel.

Image reading method and image recording and reading device

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Kanagawa, Japan

Toshitaka Agano