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    • 81. 发明授权
    • Radiation image read-out and erasing method and apparatus
    • 辐射图像读出和擦除方法及装置
    • US5665976A
    • 1997-09-09
    • US708692
    • 1996-09-05
    • Satoshi Arakawa
    • Satoshi Arakawa
    • G01N23/04
    • G01N23/043
    • A radiation image stored on a stimulable phosphor sheet is read-out by exposing the stimulable phosphor sheet to stimulating rays, photoelectrically detecting light emitted by the stimulable phosphor sheet by a photomultiplier and converting it into an electric image signal in a read-out section while feeding the stimulable phosphor sheet through a read-out section toward an erasing section. Residual radiation image information on the stimulable phosphor sheet is erased by exposing the portion of the stimulable phosphor sheet which is fed to the erasing section after passing through the read-out section to first erasing light, and exposing the stimulable phosphor sheet to second erasing light while feeding the stimulable phosphor sheet through the erasing section toward the read-out section. The first erasing light contains no light component in a wavelength range which can be detected by the photomultiplier and the second erasing light contains a light component in the wavelength range which can be detected by the photomultiplier read-out means.
    • 通过曝光可刺激的荧光体片来刺激光线,通过光电倍增管光电检测由可激发的荧光体片发射的光并将其转换成读出部分中的电图像信号,读出存储在可刺激的荧光粉片上的辐射图像,同时 将可刺激的磷光体片通过读出部分朝向擦除部分供给。 通过将通过读出部分后被供给到擦除部分的可刺激的磷光体片的部分暴露于第一次擦除光,并将可刺激的荧光体片暴露于第二擦除光,从而擦除可刺激的荧光体片上的剩余辐射图像信息 同时将可刺激的荧光体片材通过擦除部分朝向读出部分。 第一擦除光不包含可由光电倍增管检测的波长范围内的光分量,第二擦除光包含可由光电倍增管读出装置检测的波长范围内的光分量。
    • 82. 发明授权
    • Radiation image storage panel and method for using the same
    • 辐射图像存储面板及其使用方法
    • US5596202A
    • 1997-01-21
    • US504260
    • 1995-07-19
    • Satoshi Arakawa
    • Satoshi Arakawa
    • G21K4/00G01T1/29G03B42/02G01N23/04
    • G01T1/2014G01T1/2012G03B42/02
    • In a radiation image read-out method, a radiation image storage panel, on which a radiation image has been stored, is exposed to stimulating rays, which cause the panel to emit light in proportion to the amount of energy stored thereon during its exposure to radiation. The emitted light is photoelectrically detected with a photoelectric read-out device, which has detection characteristics such that it may detect light having wavelengths within a wavelength distribution range different from the wavelength distribution range of the stimulating rays and may not detect light having wavelengths within the wavelength distribution range of the stimulating rays. An image signal representing the radiation image is thereby obtained. An identification code is formed on a portion of the radiation image storage panel by using a fluorescent substance. When the fluorescent substance is exposed to the stimulating rays, it produces the fluorescence having wavelengths capable of being detected by the photoelectric read-out device. The identification code is used such that it may be clear which identification code corresponds to which information providing specific information about a radiation image.
    • 在放射线图像读出方法中,放射线图像存储面板在其上存储有放射线图像,暴露于刺激光线,这导致面板在暴露于其中时与其上存储的能量的量成比例地发光。 辐射。 利用具有检测特性的光电读出装置对光发射的光进行光电检测,使其能够检测波长在与刺激光线的波长分布范围不同的波长分布范围内的波长,并且不能检测波长在 刺激光线的波长分布范围。 从而获得表示放射线图像的图像信号。 通过使用荧光物质在辐射图像存储面板的一部分上形成识别码。 当荧光物质暴露于刺激光线时,其产生具有能够被光电读出装置检测的波长的荧光。 使用识别码,使得可以清楚哪个识别代码对应于哪个信息提供关于辐射图像的特定信息。
    • 84. 发明授权
    • Superposition processing method and apparatus for radiation images
    • 辐射图像的叠加处理方法和装置
    • US5477059A
    • 1995-12-19
    • US325475
    • 1994-10-19
    • Satoshi Arakawa
    • Satoshi Arakawa
    • G03B42/02A61B6/00G01T1/29
    • G01T1/29
    • A radiation image storage panel, on which a radiation image has been stored, is exposed to stimulating rays, which cause it to emit light in proportion to the amount of energy stored thereon during its exposure to the radiation. The emitted light is photoelectrically detected on the front surface side of the radiation image storage panel, which is the stimulating ray incidence side, and on the back surface side, two image signals being thereby obtained. The image signal components of the two image signals are added to each other, which represent corresponding picture elements on the front and back surfaces of the radiation image storage panel, an addition signal being thereby obtained. The addition ratio for the two image signals is changed in accordance with at least a single factor selected from the group consisting of the dose of the radiation irradiated to the radiation image storage panel, the kind of the radiation image storage panel, the spatial frequency of interest in the radiation image, and the conditions under which the radiation was irradiated.
    • 放射线图像存储面板在其上已经存储有放射线图像,暴露于刺激光线,这使得其在暴露于辐射期间与其上存储的能量的量成比例地发光。 在作为刺激射线入射侧的放射线图像存储面板的前表面侧对光发射的光进行光电检测,在背面侧由此得到两个图像信号。 将这两个图像信号的图像信号分量彼此相加,其表示放射线图像存储面板的前表面和后表面上的相应图像元素,从而获得相加信号。 两个图像信号的相加比率根据从照射到放射线图像存储面板的辐射的剂量,放射线图像存储面板的种类,辐射图像存储面板的种类, 对辐射图像的兴趣以及照射辐射的条件。
    • 85. 发明授权
    • Radiation image recording apparatus
    • 辐射图像记录装置
    • US5233193A
    • 1993-08-03
    • US815185
    • 1991-12-31
    • Satoshi Arakawa
    • Satoshi Arakawa
    • G01N23/04G03B42/02G21K1/02
    • G03B42/02G01N23/04G21K1/025
    • A radiation image recording apparatus comprises a source of radiation and a radiation image recording medium located facing the radiation source. A first slit plate is composed of a radiation absorber and at least two parallel slits, through which the radiation passes. The first slit plate is located between the radiation source and an object, which object is placed between the radiation source and the radiation image recording medium. A second slit plate is composed of a radiation absorber and at least two parallel slits, through which the radiation passes. The second slit plate is located between the object and the radiation image recording medium such that the slits of the second slit plate may be parallel to the slits of the first slit plate. A drive device synchronously moves the first slit plate and the second slit plate in the direction, along which the slits stand side by side with each other, such that a plane, which passes through one of the slits of the first slit plate and one of the slits of the second slit plate, may pass through the radiation source. At least either one of the first slit plate and the second slit plate has a cross-sectional shape such that the thicknesses of walls, which extend on both sides of each slit and define each slit, may become progressively smaller towards each slit.
    • 辐射图像记录装置包括辐射源和面向辐射源的辐射图像记录介质。 第一狭缝板由辐射吸收体和辐射通过的至少两个平行狭缝构成。 第一狭缝板位于辐射源和物体之间,该物体被放置在辐射源和辐射图像记录介质之间。 第二狭缝板由辐射吸收体和辐射通过的至少两个平行狭缝构成。 第二狭缝板位于物体和放射线图像记录介质之间,使得第二狭缝板的狭缝可以平行于第一狭缝板的狭缝。 一个驱动装置使第一狭缝板和第二狭缝板在狭缝彼此并排的方向上同步移动,使得穿过第一狭缝板的一个狭缝的平面和 第二狭缝板的狭缝可以穿过辐射源。 第一狭缝板和第二狭缝板中的至少任一个具有横截面形状,使得在每个狭缝的两侧延伸并限定每个狭缝的壁的厚度可朝向每个狭缝逐渐变小。
    • 87. 发明授权
    • Radiation image read-out method
    • 辐射图像读出方法
    • US5051587A
    • 1991-09-24
    • US492034
    • 1990-03-12
    • Shoji HaraSatoshi ArakawaMasamitsu Ishida
    • Shoji HaraSatoshi ArakawaMasamitsu Ishida
    • G01T1/29G03B42/02
    • G03B42/02G01T1/2014
    • A radiation image read-out method comprises the steps of exposing a stimulable phosphor sheet, on which a radiation image having a background region has been stored, to stimulating rays which cause the stimulable phosphor sheet to emit light in proportion to the amount of energy stored thereon during its exposure to radiation, and detecting the emitted light in order to obtain an image signal representing the radiation image. The shape and location of the background region are determined in advance, and only the area outside of the background region on the stimulable phosphor sheet is exposed to stimulating rays. Light emitted from the area outside of the background region is detected and converted into an image signal. Alternatively, after the shape and location of the background region are determined, the background region is erased. Thereafter, the stimulable phosphor sheet is exposed to stimulating rays, and light emitted by the stimulable phosphor sheet is detected and converted into an image signal.
    • 放射线图像读出方法包括以下步骤:将具有背景区域的放射线图像存储在其上的可刺激的荧光体片材曝光,以刺激使可激发的荧光体片材与所存储的能量的量成比例地发光的射线 在其暴露于辐射的同时,检测发射的光,以获得表示辐射图像的图像信号。 预先确定背景区域的形状和位置,并且只有可刺激的荧光体片材上的背景区域外部的区域暴露于刺激光线。 从背景区域以外的区域发射的光被检测并转换为图像信号。 或者,在确定背景区域的形状和位置之后,背景区域被擦除。 此后,可刺激的荧光体片材暴露于刺激光线,并且检测由可刺激的磷光体片发射的光并将其转换为图像信号。