Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Heavy Industries Limited

Shigeru Nishimoto

Nobuyuki Zumoto

Hiroshi Teramoto

Masahiro Yamada

Takayuki Hirano

Kunio Takahashi

Takanobu Handa

A radiation control method includes: calculating degrees of similarity corresponding to matching target areas; calculating a specific image position where a specific image area corresponding to a maximum value of the degrees of similarity out of the matching target areas is positioned in a radiographic image; and calculating a drive amount with which a therapeutic radiation ray irradiation device is driven, based on the specific image position. Further, calculating one degree of similarity corresponding to one matching target region out of the degrees of similarity includes: referring to a template table in which the matching target areas are associated with sets of templates to calculate a set of templates corresponding to the one matching target area out of the sets of templates; and detecting, from the set of templates, a similar template most similar to a matching target image displayed in the one matching target area of the radiographic image.

Radiation therapy apparatus control method and radiation therapy apparatus controller

A light device includes a shielding plate ( ) having an opening ( H) of a rectangular cross-sectional configuration and placed over an optical window retainer ( ). The shielding plate ( ) is placed so that an opening wall surface ( HS) thereof is positioned on an optical path (Zr(x)) of light emerging from an optical window ( ) at a usable angle (&thgr;e) and that a half width (Xu) of the opening ( H) satisfies Xu&equals;u/cot(&thgr;e)&plus;t&times;sin(&thgr;e)/sgrt(n &minus;sin (&thgr;e))&plus;s. The optical window retainer ( ) is placed in a region outside a boundary line given as Zh(x)&equals;&plusmn;(1&times;tan(&thgr;e)(x&plusmn;Xu)&plus;u (plus (&plus;) when x&lE;&minus;Xu; minus (&minus;) when x&gE;Xu) and also in aregion outside the optical path (Zr(x)). The light source device suppresses an uneven illuminance distribution of exposure light resulting from superimposition of light scattered from the opening wall surface of the optical window retainer upon the exposure light.

Light source device, exposure apparatus and cathode ray tube panel

An apparatus for patterning a phosphor screen on the faceplate of a cathode-ray tube has a main lens that refracts light to simulate electron-beam trajectories. The main lens includes a fixed lens with a curved surface, and at least one replaceable flat element. The apparatus also has at least one sub-lens, with a curved surface, that can be substituted for the flat element to compensate for inaccurate simulation of the electron-beam trajectories. The flat element and the sub-lens have the same thickness, so that substitution of the one for the other does not produce an unintended shifting of light paths. Preferred sub-lenses include lenses having surfaces described by a bilaterally symmetric cosine function, and by a product of a sine function and a linear function.

Apparatus for patterning a phosphor screen, having a main lens with flat elements replaceable by sub-lenses

Growing community of inventors

Tokyo, Japan

Shigeru Nishimoto