Hitachi, Ltd.

Hitachi Medical Corporation

Hokkaido University

Hitachi Consumer Electronics Co., Ltd.

Hitachi Cable Mec-tech, Ltd.

Tsuneaki Kawaguchi

Katsutoshi Tsuchiya

Takafumi Ishitsu

Kazuma Yokoi

Masatoshi Tanaka

Hiroshi Kitaguchi

Yuichi Morimoto

Isao Takahashi

Naoki Kubo

Nagara Tamaki

Hiroki Sato

Yoshinori Sunaga

Tsuyoshi Yamamoto

Atsushi Maki

Juhyun Yu

Masashi Kiguchi

Fumio Kawaguchi

Shingo Kawasaki

Yukiko Hirabayashi

Masahiko Kobayashi

Hidetaka Kawauchi

Naoyuki Yamada

Michiyuki Fujiwara

Shinya Kominami

Hideo Kawaguchi

Yukari Yamamoto

Mikihiro Kaga

Shinichi Inoue

Takushige Katsura

Shigeru Kimura

Masami Murayama

Junichi Katogi

Eiji Furuzono

Satoshi Onozuka

A radiation imaging apparatus comprises display means for displaying an image obtained by imaging an object and light projection means for projecting a light projection mark onto the object, and displays a light projection position on the object onto which the light projection mark is projected on the image. The light projection mark is projected as a line of intersection which is perpendicular to the surface of a detector and at which two planar flat light beams visually intersect each other, and the light projection position on the image is moved according to the movements of the flat light beams. By calculating projected lines obtained by projecting the light projection lines projected onto the object by the flat light beams onto the surface and displaying the projected lines on the image, the light projection position is displayed as a point of intersection of the projected lines on the image.

Radiation imaging apparatus

A radiation detector includes a semiconductor element capable of detecting a radiation, a substrate on which the semiconductor element is mounted, and a support member disposed adjacent to the semiconductor element for supporting the substrate. The substrate includes a first end portion on which the semiconductor element is mounted, and a second end portion opposite the first end portion for disposing the support member. The support member includes a first support and a second support, and the first support and the second support each includes a protrusion and an engagement hole for engaging with the protrusion. The protrusion of the first support engages with the engagement hole of the second support to fix the first support and the second support such that the substrate is compressed and supported by the first support and the second support.

Radiation detector

A collimator, a radiological imaging apparatus and a nuclear medicine diagnosis apparatus which are able to improve the sensitivity are provided. The radiological imaging apparatus has a collimatordisposed to oppose a radiological detection deviceand having through-holesfor passing to the radiological detection devicegamma rays in a specified direction out of those radiated from an object to be examined. The collimatoris produced by mutually coupling a plurality of metal tubular membersA each having the through-holewith the help of a bonding agent S in alignment with a plurality of detectorsconstituting the radiological detection device

Collimator, radiological imaging apparatus and nuclear medicine diagnosis apparatus

A radiation imaging system includes a detecting unit including a plurality of radiation detecting elements arranged in a plane for radiation detection, a collimator provided with through holes respectively aligned with the radiation detecting elements and opening in an entrance surface such that radiation from a specified direction is selectively made to fall on the radiation detecting elements. A second case joined to a first case fixed to the side surface of the collimator defines a holding chamber G, and a holder holding the detecting unit is placed in the holding chamber G such that spaces that allow the holder to be moved in a plane parallel to the entrance surface are formed between the holder and the second case. A position adjusting mechanism for adjusting the positional relation between the second case and the holder by moving the holder relative to the second case.

Radiation imaging system, nuclear medicine diagnosis apparatus and positioning adjusting mechanism

A living body information signal processing system () combining organically a living body optical measurement apparatus and a brain wave measurement apparatus, the living body optical measurement apparatus () in which inspection light of from visible to near infrared is irradiated on a head portion of a subject () and the penetration light is received and which measures an optical characteristic variation induced by a brain activity inside the head portion as a living body optical signal and the brain wave measurement apparatus () which measures an electrical characteristic variation induced by a brain activity inside the head portion of the subject as a brain wave signal, is provided with a probe device () used for both apparatus; and a living body information signal processing and displaying device () which displays the living body optical signal corresponding to respective measurement positions from the living body optical measurement apparatus and the brain wave signal corresponding to respective measurement positions from the brain wave measurement apparatus on a common display device while correlating the respective measurement positions each other, thereby, with the system comprehensive observation of both data can be achieved.

Living body information signal processing system combining living body optical measurement apparatus and brain wave measurement apparatus and probe device used for the same

A radiation imaging system is configured by a collimatorA including a detectorwith a discrete detection pixel corresponding with a pixel and a plurality of radiation passagesand looks into a plurality of detectorsthrough one radiation passageto set a step width of rotation around a rotation center axis Xonly for an angle &#x3b8;p made by lines provided by connecting a center detectorof the radiation passageand the adjacent two detectors. In the case of generating a flat plane projection image for one direction, radio-graphing is carried out on a projection image in a plurality of predetermined angle positions (&#x2212;&#x3b8;p, 0, +&#x3b8;p) in the circumferential direction of the rotation center axis Xand thereby one plane projection image is obtained.

Radiation imaging system and nuclear medicine diagnosis instrument therefor

A nuclear medial diagnosis apparatus is used for performing diagnosis by administering a medicine marked with a radioactive isotope into an examinee and by using an image obtained by detecting gamma rays emitted from a particular organ or tumor where the medicine is accumulated. An image (an image created by an image creation unit) is created by a signal (a signal as an output from a radiation detector) corresponding to the energy of the gamma ray detected by a radiation detector. The image includes a contamination component attributed to gamma scattering in the radiation detector. An image correction operation unit performs a convolution operation to obtain a contamination image. The contamination image is subtracted by a corrected image creation unit. Thus, it is possible to prevent image degradation by the gamma ray scattering in the radiation detector.

Nuclear medical diagnosis apparatus

A biomedical optical measurement apparatus comprising a light source unit for generating an inspection light containing multiple lights modulated at different frequencies, a light-receiving unit for receiving the light generated at said light source unit and passing through an object to be examined and for outputting the electric signals with the intensity corresponding to the received inspection light, and a detection means for detecting a signal with the same frequency of the reference signal in the output from said light-receiving unit. The detection means comprises an analog-digital conversion means for outputting digitized data by converting an input signal to a digital signal, a storage means for storing digitized data of multiple reference signals, a digital multiplication means for multiplying digitized data of input signals outputted from the analog-digital converting means by the digitized data of the reference signals read out from the storage means and for outputting the product of multiplication, and a digital band-limitation means for taking out DC data from the output from the digital multiplication means. Reference signal generating circuits of a number equal to that of frequencies of detected signals, which has been necessary for the conventional instrument, can be replaced by a single memory means and the configuration of the instrument can be simplified. Changes in frequency can be easily coped with by only re-writing the data of the storing means.

Biological optical measuring instrument

Disclosed herein is a radiation imaging apparatus and radiation-imaging-apparatus-based nuclear medicine diagnosis apparatus having a collimator in which a plurality of rectangular through-holes are arranged in a grid pattern and separated by septa is rotated through a predetermined angle as viewed from above in relation to the layout of a plurality of rectangular detectors that are arranged in a grid pattern. The predetermined angle ranges from 20 to 70 degree and more preferably from 30 deg to 60 deg. With this configuration, the influence of sensitivity variations (moire patterns) that are included in an image picked up due to interference with a collimator when pixel type detectors are used is eliminated.

Radiation imaging apparatus and nuclear medicine diagnosis apparatus using the same

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Kashiwa, Japan

Tsuneaki Kawaguchi