Kabushiki Kaisha Toshiba

Toshiba Electron Tubes & Devices Co., Ltd.

Canon Electron Tubes & Devices Co., Ltd.

Sumitomo Light Metal Industries, Ltd.

Atsuya Yoshida

Hiroshi Horiuchi

Hiroshi Aida

Hiroshi Kubo

Hitoshi Chiyoma

Yuichi Shimba

Wataru Matsuyama

Toyoo Yamamoto

Hitoshi Yamada

Shozo Sato

Hiroki Tanaka

Shin Tsuchida

According to one embodiment, a radiation detector includes a photo-electric conversion substrate, a scintillator layer containing a main material and a dope material and a light reflective layer or a moisture barrier layer, formed on a front surface side of the scintillator layer along a shape of the front surface of the scintillator layer. The scintillator layer includes a mixed layer portion formed of the main material the dope material on the photo-electric conversion substrate, and a dope material layer portion formed of only the dope material on a front surface side of the mixed layer portion. A front surface of at least the dope material layer portion is formed into relatively coarse shape compared to the mixed layer portion.

Radiation detector, method and apparatus of manufacturing the same, scintillator panel and method and apparatus of manufacturing the same

According to one embodiment, a scintillator includes a first layer provided on a surface of a substrate and including thallium activated cesium iodide; and a second layer provided on the first layer and including thallium activated cesium iodide. The second layer includes crystals having a [001] orientation partially diverted from a direction perpendicular to the surface of the substrate. Half width at half maximum of a frequency distribution curve of an angle between the direction perpendicular to the surface of the substrate and the [001] orientation, which is obtained by measuring the angle using EBSD method, is 2.4 degree or less.

Scintillator, scintillator panel, radiation detector and method of manufacturing scintillator

According to one embodiment, an apparatus of manufacturing a radiation detection panel, includes an evaporation source configured to evaporate a scintillator material and emit the scintillator material vertically upward, a holding mechanism located vertically above the evaporation source, and holding a photoelectric conversion substrate, and a heat conductor arranged opposite to the holding mechanism with a gap.

Apparatus and method of manufacturing radiation detection panel

According to the embodiment, a radiation detector includes a photoelectric conversion substrate converting light to an electrical signal and a scintillator layer being in contact with the photoelectric conversion substrate and converting externally incident radiation to light. The scintillator layer is made of a phosphor containing Tl as an activator in CsI, which is a halide. A concentration of the activator in the phosphor is 1.6 mass %&#xb1;0.4 mass %, and a concentration distribution of the activator in an in-plane direction and a film thickness direction is within &#xb1;15%.

Radiation detector, scintillator panel, and method for manufacturing the same

According to an embodiment, a radiation detector comprises a photoelectric conversion substrate and a scintillator layer. The photoelectric conversion substrate converts light into an electrical signal. The scintillator layer contacts the photoelectric conversion substrate and converts radiation incident from the outside into light. The scintillator layer is a fluorescer of CsI containing Tl as an activator. The CsI is a halide. The concentration of the activator inside the fluorescer is 1.6 mass %&#xb1;0.4 mass %. The concentration of the activator inside the fluorescer in an in-plane direction of the scintillator layer has the relationship of central portion&#x3e;peripheral portion. The central portion is a central region of a formation region of the scintillator layer. The peripheral portion is an outer circumferential region of the formation region of the scintillator layer.

Radiation detector and scintillator panel, and methods for manufacturing same

A scintillator panel is provided with a substrate which transmits radiation ray and a phosphor layer which is present on the surface of the substrate and which is made of a thallium-activated cesium iodide that can convert an incident radiation to visible light. The phosphor layer is covered with a moisture-proof film. The phosphor layer is an alternating laminate composed of high thallium concentration layers and low thallium concentration layers that have a thallium concentration lower than that of the high-thallium concentration layers, wherein the thickness of one thallium concentration cycle in the lamination direction is 40 nm or less.

Scintillator panel and manufacturing method therefor and radiation detector and manufacturing method therefor

A reflective resin sheet is bonded to one face of a supporting substrate transmitting a radiation ray and a resin sheet of the same material as that of the reflective resin sheet to the other face of the supporting substrate. A phosphor layer converting a radiation ray into visible light is formed additionally on the reflective resin sheet formed on one face of the supporting substrate. The phosphor layer is enclosed with an additional moisture-proof layer and the reflective resin sheet. It is possible to obtain a scintillator panel higher in sensitivity characteristics, stabilized in quality and more cost-effective by placing the reflective resin sheet between the supporting substrate and the phosphor layer.

Scintillator panel and radiation detector

An X-ray image intensifier has a vacuum envelope consisting of glass, and an input window consisting of aluminum and having a sectional meridian radius of curvature which increases from the central portion of the input window to the peripheral portion thereof is arranged on the input side of the vacuum envelope with a metal holding ring and a Kovar ring. An input phosphor surface is arranged adjacent to the inner surface side of the input window, and an X-ray image incident through the input window is converted into a photoelectron image. In order to minimize an influence caused by scattering of X-rays or .gamma.-rays incident through the input window, an input substrate is brought as close to the input window as possible. A coaxial cylindrical focusing electrode and an annular focusing electrode are arranged on the side wall in the vacuum envelope, and an anode is arranged on an output end side. An output window is formed on the output side of the anode, and an output phosphor member is arranged on the inner surface side of the output window. A transmittance with respect to a radiation beam increases in inverse proportion to the energy of the radiation beam. A transmittance abruptly increases in an area extending from the intermediate portion of the input window to the outermost periphery of the input window.

Method of manufacturing radiation image intensifier

Radiation image intensifier having a metal convex-14 Spherical radiation

An X-ray imaging tube has an input phosphor screen including a substrate, a discontinuous phosphor layer formed on the substrate, and a continuous phosphor layer formed on the discontinuous phosphor layer. The discontinuous phosphor layer consists of a large number of columnar crystals separated from each other and containing a substance for absorbing light emitted from a phosphor upon incidence of an X-ray. Light-absorbing layers containing a compound of the substance and having a concentration of the element higher on outer surfaces thereof than that in interiors thereof are formed on adjacent side surfaces of the columnar crystals such that the light-absorbing layers are not present at an interface between the discontinuous phosphor layer and the continuous phosphor layer. The gap between the adjacent side surfaces of the columnar crystals is 0.1 .mu.m or more.

X-ray imaging tube

An X-ray image intensifier includes an envelope having an input window consisting of an aluminum alloy, and an input phosphor screen arranged in the envelope to oppose the input window, and including a substrate, an input phosphor layer formed on the substrate, and a photocathode formed on the input phosphor layer, wherein the aluminum alloy contains 3 to 6 wt % of Mg and 0.01 to 0.5 wt % of Zr. This aluminum alloy may further contain at least one metal element selected from the group consisting of 0.1 to 1 wt % of Mn, 0.01 to 0.5 wt % of Cr, 0.01 to 0.5 wt % of Sc, and 0.01 to 0.05 wt % of Ti.

X-ray image intensifier

X-ray imaging tube having a light-absorbing property

An X-ray image intensifier includes a vacuum envelope having an input window for receiving X-rays, an input fluorescent screen for converting X-rays received through the input window into light, a photoelectric layer for converting the light, which was converted by the input fluorescent screen, into electrons, an anode and a converging electrode constitute an electron lens for accelerating and converging the electrons converted by the photoelectric layer, and an output fluorescent screen for converting the electrons, which were accelerated and converged by the electron lens, into a visible image. The light transmission coefficient of a peripheral portion of the input fluorescent screen is larger than that of a central portion thereof.

Growing community of inventors

Utsunomiya, Japan

Atsuya Yoshida