Hitachi, Ltd.

Hokkaido University

Acrorad Co., Ltd.

Hitachi Cable Mec-tech, Ltd.

Katsutoshi Tsuchiya

Kazuma Yokoi

Hiroshi Kitaguchi

Kensuke Amemiya

Yuuichirou Ueno

Takafumi Ishitsu

Norihito Yanagita

Shinichi Kojima

Tsuneaki Kawaguchi

Kikuo Umegaki

Naoyuki Yamada

Masatoshi Tanaka

Tomoyuki Seino

Shinya Kominami

Yuichi Morimoto

Keiji Kobashi

Naoki Kubo

Nagara Tamaki

Osamu Yokomizo

Yuichiro Ueno

Isao Takahashi

Keitaro Hitomi

Shigeru Kimura

Masami Murayama

Ryuji Jinnai

Junichi Katogi

Akihito Kitajima

Tadayoshi Shoji

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 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 radiological imaging apparatus using a semiconductor radiation detector to make it possible to reduce a radiation measurement off time that may result from an attempt to avoid polarization, the radiological imaging apparatus comprising a capacitor that applies a voltage to a semiconductor radiation detector that detects a radiation from a subject, first current regulated means for conducting a charge current to the capacitor, and second current regulated means for conducting a discharge current from the capacitor, or comprising a capacitor that applies a voltage to the semiconductor radiation detector, a first resistor that conducts a charge current to and a discharge current from the capacitor, and a second resistor connected in parallel with the first resistor to subject the capacitor to charging and discharging.

Radiological imaging apparatus

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

In a gamma camera, a plurality of radiation detector elements having a rod-shaped first electrode, a semiconductor device surrounds the first electrode to contact with it for entering a radiation, and a second electrode provided for the side surface of the semiconductor device are detachably attached to a holding member. The holding member has a first electrode contact portion contacted with the first electrode and a second electrode contact portion contacted with the second electrode. A collimator in which a plurality of radiation paths provided corresponding to the plurality of radiation detector elements are formed is arranged on the radiation entering side of the plurality of radiation detector elements. A &#x3b3;-ray detection signal outputted from the first electrode contact portion is sent to a signal processing integrated circuit. A high voltage is applied to the second electrode via the second electrode contact portion.

Radiation detector, radiation detector element, and radiation imaging apparatus

The radiological imaging system which can improve an energy resolution and perform a diagnosis with high accuracy includes a bed for carrying an examinee H, first and second imaging apparatuses and disposed along the longitudinal direction of the bed. The first imaging apparatus has a plurality of semiconductor radiation detectors for detecting &#x3b3;-rays emitted from the examinee H, arranged around the bed, the second imaging apparatus has an X-ray source for emitting X-rays to the examinee H and a radiation detector for detecting X-rays which have been emitted from the X-ray source and passed through the examinee H, and the bed is shared by the first imaging apparatus and the second imaging apparatus.

Radiological imaging system

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

The semiconductor radiological detectorminimizes a dead space resulting from the draw-out of a signal line from an electrode and which allows a number of semiconductor devices to be densely arranged to improve sensitivity and spatial resolution. The semiconductor radiological detectorcomprises a semiconductor device, an anodeattached to one surface of the semiconductor device, and a cathodeattached to the other surface of the semiconductor device. A signal lineis provided on the anode; the signal lineextends straight from the anodeand is connected to an X axis wire. Another signal lineis provided on the cathode; the signal lineextends straight from the cathodeand is connected to a Y axis wire

Semiconductor radiological detector and semiconductor radiological imaging apparatus

There are provided a radiation detection module, a printed circuit board, and a radiological imaging apparatus which make it possible to enhance spatial resolution without increasing channel number, and thereby to perform high-accuracy diagnosis. The radiation detection module includes a plurality of radiation detectors, and a wiring board on which the plurality of radiation detectors are mounted in a manner of being arranged in at least a radiation traveling direction. Here, on the wiring board, a pair of the radiation detectors which are adjacent to each other in the radiation traveling direction are electrically connected to each other, thereby configuring one detector structure (i.e., detection channel). Moreover, the radiation detectors are mounted onto the wiring board such that respective connection parts of electrodes, which are to be electrically connected to each other, are in a mutually-facing state.

Radiation detection module, printed circuit board, and radiological imaging apparatus

A radiological imaging apparatus comprising a semiconductor detector unit in which a plurality of semiconductor radiation detection elements are installed on a detector mounted substrate in a matrix to constitute a detector unit. A plurality of detector units are releasably mounted on a fixing substrate. This mounting is carried out mating a coupling screw with a threaded hole formed in the detector mounted substrate, the coupling screw being inserted through a through-hole formed in the fixing substrate. The detector mounted substrate is provided with a pair of positioning pins. The positioning pins are inserted into positioning holes, respectively, formed in the fixing substrate, to position the detector unit.

Radiation detection apparatus and radiological imaging apparatus

Radiological imaging apparatus with current regulated units, imaging apparatus with bed, imaging apparatus with opening and closing units, and power supply unit

A nuclear medicine diagnostic apparatus is provided that can improve time resolution and energy resolution and diagnosing accuracy by enhancing radiation detectors in terms of moisture-proofing and dust-proofing effects while efficiently cooling the radiation detectors. The apparatus has a first region A in which radiation detectors are to be accommodated, and a second region B in which signal processors are to be accommodated. These regions are provided inside a housing membervia an adiabatic member. The housing memberalso has a ventilation portformed to communicate with the first region A and equipped with an anti-dust filter. Ventilation holesare formed to communicate with the first region B and serving as entrances for cooling air. Unit fansserve as exits for the cooling air.

Nuclear medicine diagnostic apparatus, positron emission computed tomography apparatus, and detector units

A radiological imaging apparatus including a bed which supports an object to be examined and an imaging apparatus, wherein the imaging apparatus has a unit substrate including a first substrate including a radiation detector and a second substrate including a signal processing apparatus to which detection signals of the radiation detector are inputted and the first substrate is connected through a connector, and is provided with a heat insulating member of separating mutually a first area where the radiation detector is disposed from a second area where the signal processing apparatus is disposed, both of which are formed inside the imaging apparatus.

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Hitachi, Japan

Katsutoshi Tsuchiya