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101. 发明授权

US4861994A Method of measuring after-glow of stimulable phosphor sheet, and method of adjusting radiation image read-out conditions 失效
标题翻译：可刺激荧光粉片的后辉光测定方法以及调整放射线图像读出条件的方法
公开(公告)号：US4861994A
公开(公告)日：1989-08-29
申请号：US63052
申请日：1987-06-17
申请人： Shigeru Saotome , Tsutomu Kimura , Nobuyoshi Nakajima
发明人： Shigeru Saotome , Tsutomu Kimura , Nobuyoshi Nakajima
IPC分类号： G01T1/29 , H04N1/407
CPC分类号： G01T1/2014 , H04N1/4074
摘要： A method of measuring an after-glow of a stimulable phosphor sheet comprises the step of detecting an instantaneous light emission after-glow emanated by the stimulable phosphor sheet carrying a radiation image stored thereon by use of a photodetector when the stimulable phosphor sheet is being conveyed toward a system for final read-out after preliminary read-out is finished, thereby measuring the level of the after-glow. A method of adjusting radiation image read-out conditions comprises the steps of creating a histogram of preliminary read-out image signals obtained by preliminary read-out, detecting the instantaneous light emission after-glow by a photodetector, obtaining a signal Sx representing the level of the instantaneous light emission after-glow, and adjusting final read-out conditions and/or image processing conditions based on a value calculated by subtracting the value of the signal Sx from a characteristic value of the preliminary read-out image signals in the histogram.
摘要翻译：测量可刺激的荧光体片的后辉光的方法包括以下步骤：当可感染的磷光体片被传送时，通过使用光电检测器检测携带其上存储的放射线图像的可刺激的磷光体片发出的瞬时发光余辉在初步读出完成之后，朝向最终读出的系统，从而测量余辉的水平。调整放射线图像读出条件的方法包括以下步骤：通过初步读出创建预先读取的图像信号的直方图，通过光电检测器检测瞬时发光后辉光，获得表示电平的信号Sx 的瞬时发光后辉光，并且基于通过从直方图中的初步读出图像信号的特征值中减去信号Sx的值而计算的值来调整最终读出条件和/或图像处理条件。

102. 发明授权

US4861993A Radiation image read-out method 失效
标题翻译：辐射图像读出方法
公开(公告)号：US4861993A
公开(公告)日：1989-08-29
申请号：US776185
申请日：1985-09-13
申请人： Yuuma Adachi , Nobuyoshi Nakajima
发明人： Yuuma Adachi , Nobuyoshi Nakajima
IPC分类号： H04N1/407 , A61B6/00 , G01T1/29 , G03B42/02 , G03C5/16 , H04N1/04
CPC分类号： G01T1/2014 , G03C5/16
摘要： In a radiation image read-out method wherein preliminary read-out is conducted prior to final read-out for adjusting final read-out conditions and/or image processing conditions for a plurality of stimulable phosphor sheets carrying a radiation image of the same object recorded thereon by combination image recording, the preliminary read-out and the final read-out are conducted only for the first stimulable phosphor sheet which is first subjected to the image read-out, and only the final read-out is conducted for the other stimulable phosphor sheets by use of the read-out conditions and/or image processing conditions adjusted on the basis of the image input information obtained by the preliminary read-out of the first stimulable phosphor sheet.
摘要翻译：在放射线图像读出方法中，其中在最终读出之前进行初步读出以调整用于记录的多个可刺激的磷光体片的相对物体的最终读出条件和/或图像处理条件通过组合图像记录在其上进行初步读出和最终读出，仅针对首先进行图像读出的第一可激发荧光粉片，并且仅针对另一个可刺激的荧光体进行最终读出通过使用基于通过初步读出第一可激发荧光体片获得的图像输入信息调整的读出条件和/或图像处理条件来生成荧光体片。

103. 发明授权

US4855598A Energy subtraction processing method for radiation images, stimulable phosphor sheet, stimulable phosphor sheet composite member & stimulable phosphor sheet filter composite member used for the method 失效
标题翻译：用于辐射图像的能量减除处理方法，可刺激的荧光体片，可激发的荧光体片复合构件和用于该方法的可激发的磷光体片过滤器复合构件
公开(公告)号：US4855598A
公开(公告)日：1989-08-08
申请号：US119265
申请日：1987-11-09
申请人： Makoto Ohgoda , Nobuyoshi Nakajima
发明人： Makoto Ohgoda , Nobuyoshi Nakajima
IPC分类号： G03B42/02 , A61B6/00 , A61B6/03 , B32B7/02 , G01T1/29 , G06T1/00 , G21K4/00 , H04N7/18
CPC分类号： G01T1/2012
摘要： As an X-ray detecting means in an energy subtraction processing method, there is used a composite member comprising a plurality of stimulable phosphor sheets exhibiting different levels of characteristics of absorbing the low energy component of a radiation and overlaid one upon another, or a composite member comprising a plurality of stimulable phosphor sheets and at least one filter made of a material absorbing the low energy component of a radiation which are overlaid one upon another, or a stimulable phosphor sheet comprising a substrate made of a material absorbing the low energy component of a radiation and stimulable phosphor layers provided thereon. The composite member or the stimulable phosphor sheet is exposed to a radiation passing through an object including a specific structure to record therein at least two radiation images between which the image information at the portion of the specific structure is different. On the basis of the radiation images read out from the composite member or the stimulable phosphor sheet, a subtraction image is obtained.
摘要翻译：一种能量减法处理方法的X射线检测装置，使用复合构件，其包括多个可吸收的荧光体片，其具有吸收辐射的低能量成分并且彼此重叠的不同特性的特性，或复合材料其包括多个可刺激的荧光体片和至少一个由吸收彼此重叠的辐射的低能量成分的材料制成的过滤器，或者可刺激的磷光体片，其包含由吸收低能量成分的材料制成其上设置有辐射和可激发的荧光体层。将复合构件或可刺激的荧光体片暴露于穿过包括特定结构的物体的辐射，以在其中记录至少两个辐射图像，在该辐射图像之间，特定结构部分的图像信息不同。基于从复合构件或可刺激的荧光体片读出的放射线图像，获得减法图像。

104. 发明授权

US4843240A 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：US4843240A
公开(公告)日：1989-06-27
申请号：US182821
申请日：1988-04-18
申请人： Nobuyoshi Nakajima
发明人： Nobuyoshi Nakajima
IPC分类号： A61B6/00 , G01T1/29 , G03B42/02 , H04N5/30
CPC分类号： G03B42/02 , G01T1/2012 , H04N5/30
摘要： A radiation image recording and read-out apparatus comprises a recording and read-out unit provided with a case which houses a stimulable phosphor sheet and having a size nearly equal to the size of a single image recording area on the stimulable phosphor sheet, an image recording section for recording a radiation image on the stimulable phosphor sheet, an image read-out section for reading out the radiation image from the stimulable phosphor sheet, and an erasing section. The apparatus also comprises a grid device provided with a grid having a size nearly equal to the size of the case, and a unit movement system for moving the recording and read-out unit so that the recording and read-out unit takes a first image recording position at which the image recording section faces the grid device, and a second image recording position at which the image recording section deviates from the position facing the grid device.
摘要翻译：一种放射线图像记录和读出装置包括：记录和读出单元，其设置有容纳可刺激的荧光体片的壳体，其尺寸几乎等于可刺激荧光粉片上的单个图像记录区域的尺寸;图像用于在可刺激的荧光体片上记录放射线图像的记录部分，用于从可刺激的荧光体片材读出辐射图像的图像读出部分和擦除部分。该装置还包括具有尺寸几乎等于壳体大小的网格的网格装置，以及用于移动记录和读出单元的单元移动系统，使得记录和读出单元拍摄第一图像图像记录部分面向网格装置的记录位置以及图像记录部分偏离与格栅装置相对的位置的第二图像记录位置。

105. 发明授权

US4818880A Radiation image read-out apparatus 失效
标题翻译：辐射图像读出装置
公开(公告)号：US4818880A
公开(公告)日：1989-04-04
申请号：US710209
申请日：1985-03-11
申请人： Terumi Matsuda , Toshitaka Aagano , Junji Miyahara , Nobuyoshi Nakajima , Shigeru Saotome
发明人： Terumi Matsuda , Toshitaka Aagano , Junji Miyahara , Nobuyoshi Nakajima , Shigeru Saotome
IPC分类号： G01T1/29 , G01N23/04 , G03C5/16
CPC分类号： G01T1/2014
摘要： A radiation image read-out apparatus comprises an optical system for scanning a stimulable phosphor sheet carrying a radiation image stored therein by stimulating rays, a light guide member for guiding light emitted by the stimulable phosphor sheet upon exposure to stimulating rays, and a photoelectric converter for detecting the guided light. A film for preventing reflection of stimulating rays is closely contacted with a light input face of the light guide member. Or, a filter for absorbing the stimulating rays reflected by the stimulable phosphor sheet and transmitting the light emitted by the stimulable phosphor sheet is positioned between the stimulating ray incidence point on the stimulable phosphor sheet and the light input face of the light guide member.
摘要翻译：一种放射线图像读取装置，包括：用于通过刺激光线扫描携带其中存储的放射线图像的可刺激的荧光体片的光学系统;用于在暴露于刺激光线时引导由可刺激的荧光体片发射的光的导光部件;以及光电转换器用于检测导光。用于防止刺激光线反射的胶片与导光部件的光输入面紧密接触。或者，用于吸收可刺激的荧光体片反射的刺激光线并透射由可刺激的荧光体片发射的光的滤光器位于可刺激的荧光体片材上的刺激射线入射点与导光部件的光输入面之间。

106. 发明授权

US4806756A 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：US4806756A
公开(公告)日：1989-02-21
申请号：US912036
申请日：1986-09-29
申请人： Nobuyoshi Nakajima
发明人： Nobuyoshi Nakajima
IPC分类号： G01T1/00 , G03B42/02 , G06T1/00 , H04N1/00 , H04N1/04 , H04N1/38 , G01N23/04 , H04N5/30
CPC分类号： H04N1/38
摘要： In a method of adjusting read-out conditions for a radiation image stored on a stimulable phosphor sheet by limiting the irradiation field in a rectangular form, digital image signals at respective positions on the stimulable phosphor sheet are detected based on image information obtained by preliminary read-out. X and Y axes are set along two adjacent sides of a contour of the rectangular irradiation field on the stimulable phosphor sheet. The digital image signals are added up in the X and Y axis directions respectively, and positions on the Y axis at which the levels of the added-up signals in the X axis direction are equal to a predetermined threshold value Th and the positions on the X axis at which the levels of the added-up signals in the Y axis directions are equal to the threshold value Th are detected. A region surrounded by straight lines passing through these positions along the X and Y axes is recognized as the irradiation field. The read-out conditions for final read-out are adjusted based on the preliminary read-out image information within the irradiation field.
摘要翻译：在通过限制照射场以矩形形式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，基于通过初步读取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 X轴和Y轴沿着可激发的荧光体片上的矩形照射场的轮廓的两个相邻侧设置。数字图像信号分别在X轴方向和Y轴方向上相加，Y轴上的X轴方向的相加电平等于预定阈值Th，检测Y轴方向的相加信号的电平等于阈值Th的X轴。被沿着X轴和Y轴穿过这些位置的直线包围的区域被识别为照射场。基于照射场内的初步读出图像信息来调整用于最终读出的读出条件。

107. 发明授权

US4682028A 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：US4682028A
公开(公告)日：1987-07-21
申请号：US695332
申请日：1985-01-28
申请人： Hirosi Tanaka , Nobuyoshi Nakajima
发明人： Hirosi Tanaka , Nobuyoshi Nakajima
IPC分类号： G03B42/02 , A61B6/00 , G01T1/29 , H04N1/04 , H04N1/407 , H04N5/32 , G03C5/16
CPC分类号： H04N1/4074 , G01T1/2014
摘要： A method of adjusting radiation image read-out conditions used in a radiation image recording and reproducing system wherein preliminary read-out and final read-out are conducted for detecting the radiation image stored in a stimulable phosphor sheet. The method comprises determining a histogram of the amount of light emitted by the stimulable phosphor sheet when it is exposed to stimulating rays during the preliminary read-out. From the histogram, the maximum light emission amount Smax and the minimum light emission amount Smin of a desired image information range are calculated. Read-out conditions are adjusted so that Smax and Smin correspond respectively to the maximum signal level Qmax and the minimum signal level Qmin of a desired input signal range in an image processing apparatus which are determined by the maximum density Dmax and the minimum density Dmin of a correct density range in a finally reproduced visible image.
摘要翻译：一种调整在辐射图像记录和再现系统中使用的放射线图像读出条件的方法，其中进行初步读出和最终读出以检测存储在可刺激的磷光体片中的辐射图像。该方法包括确定由可刺激的磷光体片在预备读出期间暴露于刺激光线时发射的光量的直方图。根据直方图，计算期望图像信息范围的最大发光量Smax和最小发光量Smin。调整读出条件，使得Smax和Smin分别对应于由最大密度Dmax和最小密度Dmin确定的图像处理装置中的期望输入信号范围的最大信号电平Qmax和最小信号电平Qmin 在最终再现的可见图像中的正确密度范围。

108. 发明授权

US4652999A Radiation image read-out and gradation processing method and apparatus with means to select between different gains for gradation processing 失效
标题翻译：辐射图像读出和灰度处理方法和装置，其具有用于灰度处理的不同增益之间的选择的装置
公开(公告)号：US4652999A
公开(公告)日：1987-03-24
申请号：US692553
申请日：1985-01-18
申请人： Nobuaki Higashi , Nobuyoshi Nakajima , Hirosi Tanaka
发明人： Nobuaki Higashi , Nobuyoshi Nakajima , Hirosi Tanaka
IPC分类号： A61B6/00 , G01T1/29 , G06Q50/22 , G06Q50/24 , G06T1/00 , G06T5/00 , H04N1/407 , G06F15/62
CPC分类号： G01T1/2014 , H04N1/4072
摘要： In a system for reading out a radiation image stored in a stimulable phosphor sheet and processing the gradation of the image, final read-out is conducted by use of a read-out condition GP determined on the basis of image information obtained by preliminary read-out. On the basis of the image recording portion and/or image recording conditions, the system selects whether to directly subject the output of the final read-out conducted by use of a read-out condition GP to a gradation processing under a gradation processing condition GH predetermined in accordance with the image recording portion and/or image recording conditions or to subject the output to a gradation processing effected by use of a gradation processing condition A(GP)xGH where A(GP) denotes the function determined by the image recording portion and/or image recording conditions.
摘要翻译：在用于读出存储在可刺激的荧光体片中的放射线图像并处理图像的灰度的系统中，通过使用基于通过初步读取的图像获得的图像信息确定的读出条件GP进行最终读出，出来基于图像记录部分和/或图像记录条件，系统选择是否将通过使用读出条件GP进行的最终读出的输出直接进行到灰度处理条件GH下的灰度处理根据图像记录部分和/或图像记录条件预定，或者通过使用灰度处理条件A（GP）xGH进行灰度处理，使输出进行输入，其中A（GP）表示由图像记录部分确定的功能和/或图像记录条件。

109. 发明授权

US4620097A Method of adjusting scale factor for radiation image 失效
标题翻译：调整辐射图像比例因子的方法
公开(公告)号：US4620097A
公开(公告)日：1986-10-28
申请号：US673238
申请日：1984-11-19
申请人： Hiroshi Tanaka , Yuuma Adachi , Nobuyoshi Nakajima
发明人： Hiroshi Tanaka , Yuuma Adachi , Nobuyoshi Nakajima
IPC分类号： G03B42/02 , G01T1/29 , H04N1/407 , G03C5/16
CPC分类号： H04N1/4072 , G01T1/2014
摘要： In a radiation image recording and reproducing system, final read-out of a radiation image stored in a stimulable phosphor sheet is conducted by exposing the stimulable phosphor sheet to stimulating rays, and photoelectrically detecting light emitted by the stimulable phosphor sheet upon stimulation thereof to obtain a visible image. Prior to the final read-out, preliminary read-out is conducted for detecting the image input information by use of stimulating rays having stimulation energy lower than the stimulation energy of stimulating rays used in the final read-out. By the preliminary read-out, the minimum stimulated emission intensity among all points over the whole surface of the stimulable phosphor sheet and that among all points in one region within the radiation exposure field of the stimulable phosphor sheet at the time of the image recording are measured. A scale factor in the final read-out is adjusted in accordance with the difference between the minimum stimulated emission intensities thus measured.
摘要翻译：在放射线图像记录和再现系统中，通过暴露可刺激的荧光体片来刺激光线，并且在刺激它时对可刺激的磷光体片发射的光进行光电检测，来获得存储在可刺激的荧光粉片中的放射线图像的最终读出，以获得一个可见的图像。在最终读出之前，通过使用刺激能量低于在最终读出中使用的刺激光线的刺激能量的刺激光线来进行初步读出以检测图像输入信息。通过初步读出，在可拍摄的荧光体片的整个表面上的所有点中的所有点中的最小受激发射强度和在图像记录时的可刺激的荧光体片的辐射曝光场内的一个区域中的所有点中的最小受激发射强度分别为测量。根据所测量的最小受激发射强度之间的差异来调整最终读出中的比例因子。

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