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1. 发明授权

US4816680A Radiation image recording and read-out apparatus 失效
标题翻译：辐射图像记录和读出装置
公开(公告)号：US4816680A
公开(公告)日：1989-03-28
申请号：US787847
申请日：1985-10-16
申请人： Nobuyoshi Nakajima , Yuuma Adachi , Masamitsu Ishida
发明人： Nobuyoshi Nakajima , Yuuma Adachi , Masamitsu Ishida
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。

2. 发明授权

US4950894A Radiation image read-out method 失效
标题翻译：辐射图像读出方法
公开(公告)号：US4950894A
公开(公告)日：1990-08-21
申请号：US327459
申请日：1989-03-22
申请人： Makoto Hara , Yuuma Adachi , Masamitsu Ishida , Nobuyoshi Nakajima
发明人： Makoto Hara , Yuuma Adachi , Masamitsu Ishida , Nobuyoshi Nakajima
IPC分类号： G01T1/29 , G06T5/40
CPC分类号： G01T1/2014 , G06T5/009 , G06T5/40
摘要： In a method of reading out a radiation image stored in a stimulable phosphor sheet, preliminary read-out for approximately detecting the image is conducted. A cumulative histogram of the image information is created, read-out conditions in the final read-out are corrected based on a characteristic value of the cumulative histogram, then the final read-out is conducted using the corrected conditions. Alternatively, a standard image information range is determined from the characteristic value, and the read-out conditions are adjusted so that the standard range corresponds to a predetermined electronic signal range. In addition, in the read-out method where gradation processing is performed for electronic image signals obtained by photoelectrically detecting the phosphor light emitted by the sheet, histogram of the image signals is created, and a desired image signal range is determined therefrom. A cummulative histogram then is created, the desired range is corrected based on a characteristic value of the cumulative histogram, and gradation processing conditions are adjusted so that the corrected desired signal range corresponds to a predetermined electronic signal range. Alternatively, a standard signal range is determined based on the characteristic value, and gradation processing conditions are adjusted so that the standard range corresponds to a predetermined electronic signal range.
摘要翻译：在读出存储在可刺激的荧光体片中的放射线图像的方法中，进行用于大致检测图像的初步读出。创建图像信息的累积直方图，基于累积直方图的特征值校正最终读出中的读出条件，然后使用校正条件进行最终读出。或者，根据特征值确定标准图像信息范围，并且调整读出条件使得标准范围对应于预定的电子信号范围。此外，在对通过光电检测由片材发射的荧光体光获得的电子图像信号进行灰度处理的读出方法中，产生图像信号的直方图，并且由此确定期望的图像信号范围。然后创建累积直方图，基于累积直方图的特征值校正期望的范围，并且调整灰度处理条件，使得校正的期望信号范围对应于预定的电子信号范围。或者，基于特征值来确定标准信号范围，并且调整灰度处理条件使得标准范围对应于预定的电子信号范围。

3. 发明授权

US4816690A Method and apparatus for radiation image recording and read-out including control of read-out in accordance with irradiation field definition 失效
标题翻译：用于辐射图像记录和读出的方法和装置，包括根据照射场定义的读出控制
公开(公告)号：US4816690A
公开(公告)日：1989-03-28
申请号：US676957
申请日：1984-11-30
申请人： Yuuma Adachi , Masamitsu Ishida
发明人： Yuuma Adachi , Masamitsu Ishida
IPC分类号： G01T1/29 , H04N1/387 , G01T1/105
CPC分类号： H04N1/3872 , G01T1/2014
摘要： In a radiation image recording and read-out system, a radiation image is recorded on a stimulable phosphor sheet by use of an irradiation field stop for defining an irradiation field. The stimulable phosphor sheet is then exposed to stimulating rays which cause it to emit light in proportion to the radiation energy stored. The emitted light is photoelectrically detected. The radiation image read-out region of the stimulable phosphor sheet is limited within the irradiation field. When preliminary read-out is conducted prior to final read-out by use of stimulating rays having stimulation energy lower than the stimulation energy of stimulating rays used in the final read-out, the radiation image read-out region in the preliminary read-out is limited within the irradiation field.
摘要翻译：在放射线图像记录和读出系统中，通过使用用于限定照射场的照射场停止来将辐射图像记录在可刺激的荧光体片上。然后将可刺激的荧光体片暴露于刺激光线，使其与存储的辐射能量成比例地发光。发出的光线被光电检测。可刺激的荧光体片的辐射图像读出区域在照射场内受到限制。在通过使用刺激能量低于最终读出中使用的刺激光线的刺激能量的刺激光线进行最终读出之前进行初步读出时，初步读出中的放射线图像读出区域在照射场内受到限制。

4. 发明授权

US4816677A Method and apparatus for radiation image recording and read-out including data processing based on a portion of image data defined by an irradiation field stop 失效
标题翻译：用于辐射图像记录和读出的方法和装置，包括基于由照射场停止定义的图像数据的一部分的数据处理
公开(公告)号：US4816677A
公开(公告)日：1989-03-28
申请号：US676911
申请日：1984-11-30
申请人： Yuuma Adachi , Masamitsu Ishida
发明人： Yuuma Adachi , Masamitsu Ishida
IPC分类号： G01T1/29 , G01T1/105
CPC分类号： G01T1/2014
摘要： In a radiation image recording and read-out system, a radiation image is recorded on a stimulable phosphor sheet by use of an irradiation field stop for defining an irradiation field. The stimulable phosphor sheet is then exposed to stimulating rays which cause it to emit light in proportion to the radiation energy stored. The emitted light is photoelectrically detected, and a data processing is conducted. The data processing is conducted only on image data within the irradiation field. When preliminary read-out is conducted prior to final read-out by use of stimulating rays having stimulation energy lower than stimulation energy of stimulating rays used in the final read-out, the data processing is conducted in the preliminary read-out only on the image data within the irradiation field.
摘要翻译：在放射线图像记录和读出系统中，通过使用用于限定照射场的照射场停止来将辐射图像记录在可刺激的荧光体片上。然后将可刺激的荧光体片暴露于刺激光线，使其与存储的辐射能量成比例地发光。发射的光被光电检测，并且进行数据处理。仅对照射场内的图像数据进行数据处理。在通过使用刺激能量低于最终读出中使用的刺激光线的刺激能量的刺激光线进行最终读出之前进行初步读出时，仅在初步读出中进行数据处理照射场内的图像数据。

5. 发明授权

US4931644A Method of adjusting radiation image read-out conditions 失效
标题翻译：调整辐射图像读出条件的方法
公开(公告)号：US4931644A
公开(公告)日：1990-06-05
申请号：US164654
申请日：1988-03-07
申请人： Yuuma Adachi , Nobuyoshi Nakajima , Masamitsu Ishida
发明人： Yuuma Adachi , Nobuyoshi Nakajima , Masamitsu Ishida
IPC分类号： G01T1/29 , G03C5/16 , H04N5/30
CPC分类号： G03C5/16 , G01T1/2014 , H04N5/30
摘要： In a method of adjusting read-out conditions for a radiation image stored on a stimulable phosphor sheet by limiting the radiation exposure field, digital image signals at respective positions on the stimulable phosphor sheet for detected on the basis of image information obtained by preliminary read-out. The digital image signals are subjected to a differentiation processing, and the radiation exposure field on the stimulable phosphor sheet is detected by use of the differentiated values obtained thereby. The read-out conditions in final read-out are adjusted on the basis of the image information obtained within the detected radiation exposure field by the preliminary read-out.

6. 发明授权

US4851678A Method of adjusting radiation image read-out conditions 失效
标题翻译：调整辐射图像读出条件的方法
公开(公告)号：US4851678A
公开(公告)日：1989-07-25
申请号：US760862
申请日：1985-07-31
申请人： Yuuma Adachi , Nobuyoshi Nakajima , Masamitsu Ishida
发明人： Yuuma Adachi , Nobuyoshi Nakajima , Masamitsu Ishida
IPC分类号： G01T1/29 , G03C5/16 , H04N5/30
CPC分类号： G03C5/16 , G01T1/2014 , H04N5/30
摘要： In a method of adjusting read-out conditions for a radiation image stored on a stimulable phosphor sheet by limiting the radiation exposure field, digital image signals at respective positions on the stimulable phosphor sheet are detected on the basis of image information obtained by preliminary read-out. The digital image signals are subjected to a differentiation processing, and the radiation exposure field on the stimulable phosphor sheet is detected by use of the differentiated values obtained thereby. The read-out conditions in final read-out are adjusted on the basis of the image information obtained within the detected radiation exposure field by the preliminary read-out.
摘要翻译：在通过限制辐射曝光场来调节存储在可刺激的荧光体片上的放射线图像的读出条件的方法中，基于通过初步读出的图像获得的图像信息来检测可刺激的磷光体片上各个位置处的数字图像信号，出来对数字图像信号进行微分处理，并且通过使用由此得到的微分值来检测可刺激的荧光体片上的辐射曝光场。基于通过初步读出在检测到的辐射曝光区域内获得的图像信息来调整最终读出中的读出条件。

7. 发明授权

US4859850A Irradiation field recognizing method, and method of adjusting image processing conditions using the same 失效
标题翻译：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
申请人： Takeshi Funahashi , Masamitsu Ishida
发明人： Takeshi Funahashi , Masamitsu Ishida
IPC分类号： G03C5/16 , G06K9/32
CPC分类号： G03C5/16 , G06K9/32
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。

8. 发明授权

US4814618A Radiation image read-out method and radiation image recording read-out apparatus 失效
标题翻译：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
IPC分类号： G01T1/29 , G03B42/02 , G01T1/105
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。

9. 发明授权

US4760255A Radiation image recording and read-out apparatus 失效
标题翻译：辐射图像记录和读出装置
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
IPC分类号： G01T1/29 , G03C5/16
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。

10. 发明授权

US4317179A Method and apparatus for processing a radiographic image 失效
标题翻译：用于处理放射线照相图像的方法和装置
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
IPC分类号： G01T1/29 , H04N1/409 , H04N1/40
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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