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公开(公告)号：US5051587A
公开(公告)日：1991-09-24
申请号：US492034
申请日：1990-03-12
申请人： Shoji Hara , Satoshi Arakawa , Masamitsu Ishida
发明人： Shoji Hara , Satoshi Arakawa , Masamitsu Ishida
CPC分类号： G03B42/02 , G01T1/2014
摘要： 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.
摘要翻译： 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。
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2.发明授权Irradiation field recognizing method, and method of adjusting image processing conditions using the same 失效照射场识别方法以及使用其的图像处理条件的调整方法
公开(公告)号：US4859850A
公开(公告)日：1989-08-22
申请号：US143100
申请日：1988-01-12
摘要： In a method of recognizing an irradiation field, sample image signals at a picture element string extending from an edge of a recording region towards the center thereof are extracted from image signals detected from a recording medium. Changes among image density levels represented by the sample image signals are expressed by an approximate equation, and differences between imaginary density levels calculated by the approximate equation and actual density levels are calculated to find an edge of the irradiation field. Or, intersections of lines represented by approximate equations for picture element groups and a density change curve in a range higher than a predetermined density and represented by the sample image signals are detected, and the intersection nearest to the edge of the recording region is recognized as the edge of the irradiation field. Image processing conditions are adjusted based on the image signals inside of the recognized irradiation field.
摘要翻译： 在识别照射场的方法中，从从记录介质检测的图像信号中提取从记录区域的边缘向其中心延伸的像素串的样本图像信号。 由样本图像信号表示的图像浓度水平之间的变化由近似等式表示，并且计算由近似方程计算的虚拟浓度水平与实际浓度水平之间的差异以找到照射场的边缘。 或者，检测由像素组的近似方程表示的线和在高于预定浓度并由样本图像信号表示的范围内的浓度变化曲线的交点，并且将最接近记录区域的边缘的交叉识别为 照射场的边缘。 基于识别的照射场内的图像信号来调整图像处理条件。
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3.发明授权Radiation image read-out method and radiation image recording read-out apparatus 失效辐射图像读出方法和放射线图像记录读出装置
公开(公告)号：US4814618A
公开(公告)日：1989-03-21
申请号：US712063
申请日：1985-03-15
申请人： Tokukazu Saito , Masamitsu Ishida
发明人： Tokukazu Saito , Masamitsu Ishida
CPC分类号： G01T1/2014 , G03B42/02
摘要： A radiation image read-out method comprises the steps of detecting the amount of light instantaneously emitted by a specific region of a stimulable phosphor sheet when the stimulable phosphor sheet is exposed to a radiation passing through an object to have a radiation image of the object stored therein, and adjusting read-out conditions and/or image processing conditions on the basis of the detected light amount. The stimulable phosphor sheets are circulated through an image recording section, a read-out section, and an erasing section by conveyor belts and reused for image recording.
摘要翻译： 放射线图像读取方法包括以下步骤：当可刺激的荧光体片暴露于穿过物体的辐射时，检测由可刺激的荧光粉片的特定区域瞬时发射的光量，以存储被摄体的辐射图像 并且基于检测到的光量调整读出条件和/或图像处理条件。 可刺激的荧光片通过传送带通过图像记录部分，读出部分和擦除部分循环，并重新用于图像记录。
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公开(公告)号：US4760255A
公开(公告)日：1988-07-26
申请号：US755993
申请日：1985-07-17
申请人： Tsutomu Kimura , Tokukazu Saito , Masamitsu Ishida
发明人： Tsutomu Kimura , Tokukazu Saito , Masamitsu Ishida
CPC分类号： G01T1/2012
摘要： A radiation image recording and read-out apparatus is provided with a body comprising a system for conveying stimulable phosphor sheets for recording radiation images along a path, and an image recording section and an image read-out section which are positioned on the path. The apparatus body is provided with a section positioned at the upstream end of the path for feeding the stimulable phosphor sheets to the sheet conveying system, and a section positioned at the downstream end of the path for ejecting the stimulable phosphor sheets from the sheet conveying system. Or, the apparatus body is connected by conveyor belts with an erasing unit for erasing radiation energy remaining in the stimulable phosphor sheets after image read-out. The apparatus body and the erasing unit are positioned independently of each other in spaced relation by a predetermined distance.
摘要翻译： 放射线图像记录和读出装置设置有主体，其包括用于传送沿着路径记录辐射图像的可刺激的荧光片的系统，以及位于路径上的图像记录部分和图像读出部分。 设备主体设置有位于路径的上游端的部分，用于将可刺激的磷光体片材供给到片材输送系统，以及位于路径的下游端的部分，用于从片材输送系统喷射可刺激的磷光体片材 。 或者，设备主体通过传送带与擦除单元连接，用于在图像读出之后擦除在可刺激的磷光体片中残留的辐射能量。 设备主体和擦除单元以预定的距离彼此隔开定位。
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公开(公告)号：US4317179A
公开(公告)日：1982-02-23
申请号：US106734
申请日：1979-12-26
申请人： Hisatoyc Kato , Masamitsu Ishida , Seiji Matsumoto
发明人： Hisatoyc Kato , Masamitsu Ishida , Seiji Matsumoto
CPC分类号： H04N1/4092 , G01T1/2014
摘要： A method of and apparatus for processing a radiographic image in a radiographic image copying system in which an original radiograph scanned with the light beam and the image information of the radiograph is read out by a detector which gives an output to be processed and used for reproducing an image on a recording material. In the processing of the detected output, an operation represented by a formulaD'=Dorg+.beta.(Dorg-Dus)is conducted, where Dorg is the original image density detected by the detector, .beta. is an emphasis coefficient, and Dus is an unsharp mask density corresponding to a super-low spatial frequency at every scanning point. The unsharp masking process may be performed together with a gradation process, reduction of image size, smoothing process and the like. Further, the emphasis coefficient may be varied with either the original image density Dorg or the unsharp mask signal Dus.
摘要翻译： 一种用于处理放射线照相图像复制系统中的放射线照相图像的方法和装置，其中用光束扫描的原始X射线和放射线照片的图像信息由检测器读出，该检测器给出要被处理并用于再现的输出 记录材料上的图像。 在检测到的输出的处理中，进行由公式D'= Dorg +β（Dorg-Dus）表示的操作，其中Dorg是由检测器检测到的原始图像浓度，β是强调系数，Dus是不清晰度 掩模密度对应于每个扫描点的超低空间频率。 可以与灰度处理，图像尺寸的减小，平滑处理等一起执行不清晰的掩蔽处理。 此外，可以利用原始图像浓度Dorg或钝化掩模信号Dus来改变强调系数。
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公开(公告)号：US5028781A
公开(公告)日：1991-07-02
申请号：US116196
申请日：1987-11-03
CPC分类号： G06T5/50 , G01T1/2014 , H04N1/4074
摘要： In an energy subtraction processing for radiation images conducted by use of stimulable phosphor sheets, a characteristic value of a difference signal obtained by a subtraction processing of digital image signals detected from the stimulable phosphor sheets carrying radiation images stored therein is calculated. When the difference signal is subjected to a gradation processing, the characteristic value is made to correspond to a predetermined density of a reproduced image by uniformly converting the difference signal or by correcting a gradation conversion table used for the gradation processing.
摘要翻译： 在通过使用可刺激的荧光体片进行的放射线图像的能量减除处理中，计算通过对从携带其中存储的辐射图像的可刺激的磷光体片材检测的数字图像信号的减法处理而获得的差分信号的特征值。 当差分信号进行灰度处理时，通过均匀地转换差分信号或校正用于灰度处理的灰度转换表，使特征值对应于再现图像的预定浓度。
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公开(公告)号：US4943724A
公开(公告)日：1990-07-24
申请号：US182678
申请日：1988-04-18
申请人： Shigeru Saotome , Masamitsu Ishida
发明人： Shigeru Saotome , Masamitsu Ishida
CPC分类号： G03B42/02 , G01T1/2012
摘要： A radiation image recording and read-out apparatus comprises a recording and read-out unit provided with a case having a size nearly equal to a single image recording area on a stimulable phosphor sheet, an image recording section for recording a radiation image of an object on the stimulable phosphor sheet, an image read-out section provided in the case for reading the radiation image from the stimulable phosphor sheet, and an erasing section provided in the case. The recording and read-out unit is moved between a first position at which the stimulable phosphor sheet is disposed at an image recording position exposed to radiation passing through the object, and a second position retracted from the first position. A fluoroscopic device is provided for receiving the radiation passing through the object at the time the recording and read-out unit is present at its second position, and converting the radiation into signals for a visible image.
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公开(公告)号：US4882489A
公开(公告)日：1989-11-21
申请号：US183806
申请日：1988-04-20
申请人： Shigeru Saotome , Masamitsu Ishida
发明人： Shigeru Saotome , Masamitsu Ishida
CPC分类号： A61B6/02 , G01T1/2012 , G03B42/02 , H04N1/1017 , H04N1/12 , H04N2201/0079
摘要： A radiation image recording and read-out apparatus comprises a radiation source for irradiating a radiation toward an object, a recording and read-out unit for recording a radiation image of the object on a stimulable phosphor sheet at an image recording position and reading the radiation image therefrom, and a movement system for moving the recording and read-out unit and the radiation source so that the stimulable phosphor sheet at the image recording position approximately satisfies the linear rule and the geometric rule with respect to the radiation source around an arbitrary tomographic layer. The recording and read-out unit is provided with a case having a size nearly equal to a single image recording area on the stimulable phosphor sheet, an image recording section, an image read-out section provided in the case for reading the radiation image from the stimulable phosphor sheet by exposure to stimulating rays, and an erasing section provided in the case.
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公开(公告)号：US4847498A
公开(公告)日：1989-07-11
申请号：US695331
申请日：1985-01-28
申请人： Tokukazu Saito , Masamitsu Ishida
发明人： Tokukazu Saito , Masamitsu Ishida
CPC分类号： G01T1/2014 , G03C5/16
摘要： A radiation image stored in a stimulable phosphor sheet is read out by exposing the stimulable phosphor sheet to stimulating rays which cause it to emit light in proportion to the radiation energy stored, and photoelectrically detecting the emitted light. Prior to final read-out for obtaining an electric image signal used for reproducing a visible image, preliminary read-out is conducted by uniformly exposing the whole surface of the stimulable phosphor sheet to stimulating rays to have the whole surface of the stimulable phosphor sheet emit light, detecting the amount of the light emitted by a specific region of the stimulable phosphor sheet, and grasping the radiation image information on the basis of the detected light amount.
摘要翻译： 通过暴露可刺激的荧光体片材来刺激存储在可刺激的荧光体片材中的辐射图像，以刺激使其与存储的辐射能量成比例地发光的光线，并且光电检测发射的光。 在获得用于再现可见图像的电子图像信号的最终读取之前，通过均匀地曝光可刺激的荧光体片的整个表面来进行初步读出，以刺激光线以使可刺激的磷光体片的整个表面发射 检测由可刺激的荧光体片的特定区域发射的光的量，并且基于检测到的光量来掌握辐射图像信息。
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公开(公告)号：US4816680A
公开(公告)日：1989-03-28
申请号：US787847
申请日：1985-10-16
IPC分类号： G01T1/29
CPC分类号： G01T1/2014
摘要： A radiation image recording and read-out apparatus using stimulable phosphor sheets. The apparatus has a circulation path along which the stimulable phosphor sheets are conveyed. An image recording section, an image read-out section and image erasing section are provided. An imput means is provided for inputting the kind of recording and the exposure condition of the radiation, and a control means is used for determining the read-out condition based on the input information given by the input means. The apparatus optionally has an image processing section and the control means may also be used for determining the image processing condition based on the information input be the input means.
摘要翻译： 一种使用可刺激的荧光片的放射线图像记录和读出装置。 该装置具有可刺激的磷光体片沿其传送的循环路径。 提供图像记录部分，图像读出部分和图像擦除部分。 提供输入装置用于输入辐射的种类和曝光条件，并且控制装置用于基于由输入装置给出的输入信息来确定读出条件。 该装置可选地具有图像处理部分，并且控制装置还可以用于基于作为输入装置的信息输入来确定图像处理条件。
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