Hitachi, Ltd.

Hokkaido University

Keiji Kobashi

Takafumi Ishitsu

Kensuke Amemiya

Yuuichirou Ueno

Kenichi Hattori

Takashi Watanabe

Katsutoshi Tsuchiya

Kazumasa Ide

Akiyoshi Komura

Ryoichi Shiobara

Tomoyuki Seino

Yasuomi Yagi

Kengo Iwashige

Wataru Takeuchi

Shinichi Shimizu

Shusuke Hirayama

Rintarou Fujimoto

Yusuke Vincent Fujii

Kazuma Yokoi

Isao Takahashi

Kikuo Umegaki

Norihito Yanagita

Masumi Umezawa

Yuichiro Ueno

Toru Umekawa

Taeko Matsuura

Hiroki Shirato

Yuichi Morimoto

Atsuro Suzuki

Kazuki Matsuzaki

Yuusuke Fujii

Masahiro Mizuta

Hiroyuki Date

A proton beam therapy systemincludes an irradiation nozzlefor irradiating a targetA with a particle beam, a proton beam irradiation control systemthat controls the irradiation nozzle, a dose monitorB that measures an irradiation amount of the particle beam emitted to the targetA, a position monitorA that measures a position of the particle beam emitted to the targetA, and a dose distribution evaluation system during irradiationthat calculates a dose distribution of the particle beam emitted to the targetA during irradiation. This system supports a medical staff to quickly and appropriately make an intervention determination for treatment such as discontinuation of particle therapy, a change in conditions thereof, or the like in the process of particle irradiation.

Particle therapy system, dose distribution evaluation system, and method for operating particle therapy system

A treatment planning apparatusor a clinical decision support apparatuscalculates a dose distribution, calculates the damage to a normal tissue for a plurality of number of times of radiation irradiation based on the calculated dose distribution, and displays at least one or more calculated damages to the normal tissues on display apparatusesandor outputs the same to an outside of the apparatusesand. Accordingly, since effects can be calculated for a plurality of number of times of irradiation, the optimum number of time of irradiation can be presented, and an operator and a doctor can be presented with a suitable decision material of a radiation irradiation planning.

Radiation irradiation planning apparatus, clinical decision support apparatus and program

There is provided is a radiation image acquiring device which corrects a positional displacement between a collimator and a detector and obtains an image without artifacts. The device includes a detector () to measure a radiation; a collimator () including a through-hole () having one or more detectors () disposed therein and configured to limit an incident direction of the radiation; a positional displacement measuring unit configured to measure a positional displacement between the detector () and the collimator () by use of a profile of a radiation source measured by the detector () based on the radiation source disposed corresponding to a predetermined detector ().

Radiation image acquiring device

A first &#x3b3;-ray generating in a body, caused by a PET pharmaceutical, and a second &#x3b3;-ray emitted from a &#x3b3;-ray source and transmitting through the body are detected with a radiation detector. The emission image information (E image information), E, Eand E, at each of patient motion phases,and, which divided a respiration period, are prepared by using information obtained from the detected first &#x3b3;-ray. The transmission image information (T image information), T, Tand T, at each of patient motion phases,and, respectively, are prepared, by using information obtained from the detected second &#x3b3;-ray. Relative displacements, ([F], [F]), are determined by superimposing, on T image information T, other T image information, Tand T. The E image information, E, E, are superimposed on the E image information E, by using this relative displacement.

Image generation method and device for emission computed tomography

A nuclear medical diagnosis apparatus capable of attaining improvement of the sensitivity by the reduction of a count loss of the data is provided. A data sort section inside a data acquisition unit re-arranges and outputs the data packet from a plurality of auxiliary data acquisition unit in order of the detection time data. A coincidence detection section includes a pair check section and a pair generation section. The pair check section refers to a context on the data packet re-arranged in order of the detection time, and judges a pair relating to a coincidence counting. The pair generation section, based on this judgment result, merges the data packet used as a pair, and outputs the same to the collection work station.

Nuclear medical diagnosis apparatus

The energy calibration method detects irradiation of radiation with predetermined energy from a calibration radiation source using a plurality of radiation detectors having a peak value distribution whose mode and mean value are different and performs calibration so that mean values become identical within the peak value distributions of the respective radiation detectors obtained through irradiation of radiation with predetermined energy from the calibration radiation source.

Energy calibration method and radiation detecting and radiological imaging apparatus

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 includes an imaging apparatus having an opening for insertion of a bed thereinto, and an attenuation correction data creating device. The imaging has a plurality of radiation detectors disposed around the opening and a plurality of gamma ray generation units residing between the opening and the radiation detectors disposed at a position nearest to the opening and being placed in a longitudinal direction of the bed. Each &#x3b3;-ray generation unit has &#x3b3;-ray sources of single photon emission nuclear species and is arranged to externally radiate a &#x3b3;-ray alternately from either one of the &#x3b3;-ray generators toward the opening. The data creator prepares attenuation correction data based on a detection signal as output from the radiation detector due to the incoming radiation of &#x3b3;-rays from the &#x3b3;-ray generator.

Radiological imaging apparatus and transmission imaging method

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

An electric rotating machine capable of lowering the temperature of a rotor disposed, wherein at least one of closed ventilation loops for cooling is formed, one of the loops constituting a ventilation passage communicating with an exhaust side through a heat source of the end of the generator to a cooler, thereby to supply cooling wind to the rotor after it passes through the cooler.

Electric rotating machine

Dynamo-electric machine

Growing community of inventors

Mito, Japan

Keiji Kobashi