Mitsubishi Electric Corporation

Mitsubishi Denki Kabushiki Kaisha

Nobuhiko Ina

Hirohiko Higuchi

Tomohiro Yatagawa

Yuichi Yamamoto

Masahiro Ikeda

Takaaki Iwata

Hisashi Harada

Osamu Takahashi

Yuehu Pu

Takahisa Nagayama

Takanori Tsunoo

An X-ray positioning apparatus according to the present invention is provided with an X-ray video device that generates second X-ray image data in which a respiratory signal of a patient and first X-ray image data are related to each other, a positioning computer that generates patient platform control data for controlling a patient platform, and a photographing trigger generation apparatus that outputs a photographing trigger signal to an X-ray tube; the X-ray positioning apparatus is characterized in that the photographing trigger generation apparatus generates the photographing trigger signal, in accordance with a first frame rate and a second frame rate that is higher than the first frame rate, and in that the positioning computer generates the patient platform control data, based on a reference image and one X-ray image selected from consecutively photographed images that are photographed at the second frame rate.

X-ray positioning apparatus, X-ray positioning method, and attentional image photographing method

An irradiation apparatus radiates a particle beam after forming the beam for plural layers. A dose monitor measures a dose in real time. A dose evaluation unit evaluates an irradiation dose for each layer on the basis of a value measured by the dose monitor and a dose calibration factor set for each layer. An irradiation control section performs radiation control for each layer on the basis of an evaluation result of the dose evaluation unit. An interpolation value generation unit uses actual-measurement dose-calibration factors obtained by radiating a particle beam to a simulated phantom provided with a calibration dosimeter, to generate an interpolation estimation value of the dose calibration factor. For each layer subject to the interpolation value, and based on an irradiation condition of that layer, the interpolation value generation unit performs weighting on each of the actual-measurement dose-calibration factors.

Particle therapy device and method for setting dose calibration factor

Display screen with graphical user interface

The present invention provides a particle beam accelerator for accelerating charged particles along a traveling direction of the charged particles. The invention provides a particle beam accelerator, in which the charged particle beam deflected by spiral-shaped-deflecting electromagnet, is accelerated by an accelerating unit, the charged particle beam circulating in an annular vacuum passageway of a vacuum ducta plurality of times differing in orbit. And gapis formed in the accelerating unitof the vacuum duct, and gap-constituting face of the vacuum ductis formed to be perpendicular to each of the traveling directions of the charged particle beam orbiting on a first orbit and on a second orbit. In the above accelerator, vibrations of the charged particle beam can be brought under control and loss of the charged particle beam can be reduced.

Particle beam accelerator

Growing community of inventors

Tokyo, Japan

Nobuhiko Ina