Hitachi, Ltd.

Acrorad Co., Ltd.

Yuuichirou Ueno

Kensuke Amemiya

Hiroshi Kitaguchi

Kazuma Yokoi

Shinichi Kojima

Norihito Yanagita

Kikuo Umegaki

Katsutoshi Tsuchiya

Takafumi Ishitsu

Takashi Okazaki

Takashi Matsumoto

Kazuhiro Takeuchi

Tomoyuki Seino

Norihito Yanagida

Naoyuki Yamada

Keiji Kobashi

Shinya Kominami

Osamu Yokomizo

Tsutomu Imai

Keitaro Hitomi

Shinobu Irikura

Akihito Kitajima

Tadayoshi Shoji

A radiological imaging apparatus of the present invention comprises an image pickup device and a medical examinee holding device that is provided with a bed. The image pickup device includes a large number of radiation detectors and radiation detector support plates. A large number of radiation detectors are mounted around the circumference of a through-hole and arranged in the axial direction of the through-hole. The radiation detectors are arranged in three layers formed radially with respect to the center of the through-hole and mounted on the lateral surfaces of the radiation detector support plates. Since the radiation detectors are not only arranged in the axial direction and circumferential direction of the through-hole but also arrayed in the radial direction, it is possible to obtain accurate information about a &#x3b3;-ray arrival position in the radial direction of the through-hole (the positional information about a radiation detector from which a &#x3b3;-ray image pickup signal is output). The use of accurate information about &#x3b3;-ray arrival increases the tomogram accuracy. As a result, the present invention enhances the, tomogram accuracy, that is, the PET examination accuracy.

Radiological imaging apparatus

A radiological imaging apparatus of the present invention comprises an image pickup device and a medical examinee holding device that is provided with a bed. The image pickup device includes a large number of radiation detectors and radiation detector support plates. A large number of radiation detectors are mounted around the circumference of a through-hole and arranged in the axial direction of the through-hole. The radiation detectors are arranged in three layers formed radially with respect to the center of the through-hole and mounted on the lateral surfaces of the radiation detector support plates. Since the radiation detectors are not only arranged in the axial direction and circumferential direction of the through-hole but also arrayed in the radial direction, it is possible to obtain accurate information about a &#x3b3;-ray arrival position in the radial direction of the through-hole (the positional information about a radiation detector from which a &#x3b3;-ray image pickup signal is output). The use of accurate information about &#x3b3;-ray arrival increases the tomogram accuracy. As a result, the present invention enhances the tomogram accuracy, that is, the PET examination accuracy.

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.

A radiological imaging apparatus of the present invention includes an X-ray source for emitting an X-ray, a &#x3b3;-ray detecting section for outputting a detection signal of a &#x3b3;-ray, and an X-ray detecting section for outputting a detecting signal of an X-ray. The X-ray source moves around a bed for placing an examinee. The &#x3b3;-ray detecting section has a plurality of radiation detectors aligned in the longitudinal direction of the bed and placed around the bed. The X-ray detecting section is positioned in a region formed between one end and the other end of the &#x3b3;-ray detecting section in the longitudinal direction of the bed. The X-ray source is also positioned in the region. Since the X-ray detecting section is placed in the region, it is possible to accurately combine a PET image and an X-ray computed tomographic image.

Radiological imaging apparatus and radiological imaging method and radiological imaging support method

A positron emission tomography apparatus installs a plurality of detector units in the circumference of a bed. The detector unit installs a plurality of combined substrates including detectors, analogue ASICs, and a digital ASIC and a voltage adjustment device inside a housing. A partition plate installed inside the housing separates the region inside the housing into a first region installed with the combined substrates and a second region installed with the voltage adjustment device. The partition plate blocks noise generated in the voltage adjustment device so as not to affect &#x3b3;-ray detection signals outputted from the detectors, thereby preventing the effect of the noise generated in the voltage adjustment device toward &#x3b3;-ray detection signals and shortening the examination time.

Radiological imaging apparatus and positron emission tomographic apparatus

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 radiological imaging apparatus of the present invention comprises an image pickup device and a medical examinee holding device that is provided with a bed. The image pickup device includes a large number of radiation detectors and radiation detector support plates. A large number of radiation detectors are mounted around the circumference of a through-hole and arranged in the axial direction of the through-hole. The radiation detectors are arranged in three layers formed radically with respect to the center of the through-hole and mounted on the lateral surfaces of the radiation detector support plates. Since the radiation detectors are not only arranged in the axial direction and circumferential direction of the through-hole but also arrayed in the radial direction, it is possible to obtain accurate information about a &#x3b3;-ray arrival position in the radial direction of the through-hole (the positional information about a radiation detector from which a &#x3b3;-ray image pickup signal is output). The use of accurate information about &#x3b3;-ray arrival increases the tomogram accuracy. As a result, the present invention enhances the tomogram accuracy, that is, the PET examination accuracy.

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

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.

Radiological imaging apparatus and its cooling system

A radiation imaging apparatus with high spatial resolution including semiconductor radiation detectors arranged on a wiring board capable of detecting &#x3b3;-rays by separating their positions in the direction of incidence of &#x3b3;-rays is provided. A semiconductor radiation detector is constructed by including five semiconductor devices made up of, for example, CdTe rectangular parallelepiped plates, a cathode electrode on one side of the semiconductor device, an anode electrode on the other side of the semiconductor device and an insulator for coating five semiconductor detection devices from the outside. The semiconductor radiation detector is mounted on a wiring board using an anode pin and a cathode pin.

Semiconductor radiation detector and radiological imaging apparatus

A radiological imaging apparatus allowing semiconductor radiation detectors to be easily replaced with new ones and densely arranged. Terminals () and () are provided on a bottom surface of a detector aggregate () including a plurality of semiconductor radiation detectors (); the terminals is connected to electrodes (and) of the detectors (). A plurality of zero insertion force connectors () are provided on a connecting device () installed on a support substrate (). The terminals (and) are detachably attached to the zero insertion force connectors () to mount the detector aggregates () that are the semiconductor radiation detectors (), on the support substrate (). When the detector aggregates () are attached to the zero insertion force connectors (), since no frictional force acts on the terminals, the size of the gap between the detector aggregates () is reduced.

Growing community of inventors

Hitachi, Japan

Yuuichirou Ueno