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1.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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公开(公告)号：US4747052A
公开(公告)日：1988-05-24
申请号：US791678
申请日：1985-10-28
CPC分类号： H04N1/409
摘要： A method and apparatus for image processing on a radiation image which may be a conventional radiographic image on X-ray film or a radiation image which is stored in a stimulable phosphor and read out therefrom. The radiation image is scanned by a light beam or stimulating rays and an image signal is obtained by use of a photodetector. The image signal is subjected to a frequency processing by use of an unsharp masking process. The unsharp mask signal (Sus) is used for conducting an operation ofSorg+.beta.(Sorg-Sus)to obtain an image-processed signal S, wherein Sorg is a digital signal for each picture element of the scanned image and .beta. is a frequency emphasizing coefficient. The median of a group of digital signals in an unsharp mask of a predetermined size is employed.
摘要翻译： 用于对放射线图像进行图像处理的方法和装置，其可以是X射线胶片上的常规放射线图像或存储在可刺激的荧光体中并从其读出的放射线图像。 通过光束或刺激光线扫描放射线图像，并且通过使用光电检测器获得图像信号。 图像信号通过使用不清晰的掩蔽处理进行频率处理。 钝化掩模信号（Sus）用于进行Sorg + beta（Sorg-Sus）的操作以获得图像处理信号S，其中Sorg是扫描图像的每个像素的数字信号，β是强调频率 系数。 采用预定尺寸的钝化掩模中的一组数字信号的中值。
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公开(公告)号：US4864133A
公开(公告)日：1989-09-05
申请号：US901110
申请日：1986-08-28
CPC分类号： G01T1/2014 , G06K9/32
摘要： In a radiation image read-out method using a stimulable phosphor sheet, read-out conditions in final read-out are adjusted based on preliminary read-out image information on a region recognized as an irradiation field. To recognize the irradiation field, sample image signals are extracted from preliminary read-out image signals at a picture element string extending from an end towards the center of the stimulable phosphor sheet. Changes between image density levels represented by the sample image signals are expressed by an approximate equation, and differences between imaginary image density levels calculated by the approximate equation and the actual image density levels are calculated. Or, the image density changes are expressed by approximate equations for picture element groups, and differences between imaginary image density levels calculated by the approximate equations in each picture element group are calculated. Or, intersections of lines represented by the approximate equations and an image density change curve higher than a predetermined density level and represented by the sample image signals are detected, and the intersection nearest to the sheet end is recognized as an edge of the irradiation field.
摘要翻译： 在使用可激发荧光体片的放射线图像读出方法中，基于对被识别为照射场的区域的预先读出的图像信息来调整最终读出中的读出条件。 为了识别照射场，从从可触发的磷光体片的端部向中心延伸的像素串，从初步读出的图像信号中提取采样图像信号。 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，并且计算通过近似方程式计算的虚像密度水平与实际图像浓度水平之间的差异。 或者，图像密度变化由图像元素组的近似等式表示，并且计算由每个像素组中的近似等式计算的虚像密度等级之间的差。 或者，检测由近似等式表示的线的交点和高于预定浓度水平并由样本图像信号表示的图像浓度变化曲线，并且将最接近纸张端的交叉识别为照射场的边缘。
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4.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：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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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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