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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

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.

4. 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。

5. 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。

6. 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。

7. 发明授权

US5028781A Density correcting method and apparatus for subtraction image 失效
标题翻译：用于减影图像的密度校正方法和装置
公开(公告)号：US5028781A
公开(公告)日：1991-07-02
申请号：US116196
申请日：1987-11-03
申请人： Kazuo Shimura , Nobuyoshi Nakajima , Masamitsu Ishida
发明人： Kazuo Shimura , Nobuyoshi Nakajima , Masamitsu Ishida
IPC分类号： G01T1/29 , G06T5/50 , H04N1/407
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。

8. 发明授权

US5029083A Energy subtraction processing method using weighted average of plural stacked sheets for creating high energy image 失效
标题翻译：能量减法处理方法使用加权平均多张堆叠片材来产生高能量图像
公开(公告)号：US5029083A
公开(公告)日：1991-07-02
申请号：US467293
申请日：1990-01-16
申请人： Kazuo Shimura , Nobuyoshi Nakajima , Masamitsu Ishida
发明人： Kazuo Shimura , Nobuyoshi Nakajima , Masamitsu Ishida
IPC分类号： A61B6/00 , G01T1/00 , G03B42/02 , G06T5/50 , H04N7/18
CPC分类号： G06T5/50 , G03B42/02
摘要： In an energy subtraction processing for radiation images, a plurality of stimulable phosphor sheets laid one upon the other are simultaneously exposed to a radiation of high energy passing through an object, and then a different stimulable phosphor sheet is exposed to a radiation of low energy passing through the same object. Digital image signals detected from the stimulable phosphor sheets exposed to the high energy radiation are weighted and subjected to arithmetic averaging. A subtraction processing is carried out between an image signal obtained by the arithmetic averaging and an image signal detected from the stimulable phosphor sheet exposed to the low energy radiation.
摘要翻译：在放射线图像的能量减除处理中，将多个彼此叠置的可激发的荧光体片同时暴露于穿过物体的高能量的辐射，然后将不同的可刺激的荧光体片暴露于低能量通过的辐射通过相同的对象。从暴露于高能量辐射的可刺激的磷光体板检测到的数字图像信号被加权并进行算术平均。在通过算术平均获得的图像信号和从暴露于低能量辐射的可激励荧光粉片检测到的图像信号之间进行减法处理。

9. 发明授权

US4985630A Radiation image read-out apparatus and reproduction condition designating apparatus 失效
标题翻译：辐射图像读出装置和再现条件指定装置
公开(公告)号：US4985630A
公开(公告)日：1991-01-15
申请号：US171242
申请日：1988-03-18
申请人： Nobuaki Higaski , Masamitsu Ishida , Nobuyoshi Nakajima
发明人： Nobuaki Higaski , Masamitsu Ishida , Nobuyoshi Nakajima
IPC分类号： G01T1/29 , H04N1/407 , H04N1/409 , G01N23/04
CPC分类号： H04N1/4072 , G01T1/2014 , H04N1/409
摘要： A radiation image read-out apparatus comprises a read-out device for detecting a radiation image recorded on a recording medium and generating an electric image signal, an input device for entering information concerning the image recording portion of an object and the image recording method, and a control device for adjusting read-out conditions on the basis of the information entered by the input device and feeding the adjusted read-out conditions to the read-out device. A reproduction condition designating apparatus is constituted by the input device, the control device, a device for displaying the reproduction conditions adjusted by the control device, and a correction input device for correcting the reproduction conditions displayed by the display device.
摘要翻译：放射线图像读取装置包括读出装置，用于检测记录在记录介质上的放射线图像并产生电图像信号;输入装置，用于输入关于物体的图像记录部分的信息和图像记录方法; 以及控制装置，用于根据由输入装置输入的信息调整读出条件，并将调整后的读出条件送给读出装置。再现条件指定装置由输入装置，控制装置，用于显示由控制装置调节的再现条件的装置和用于校正由显示装置显示的再现条件的校正输入装置构成。

10. 发明授权

US4896037A High-speed image recording apparatus for energy subtraction processing 失效
标题翻译：用于能量减法处理的高速图像记录装置
公开(公告)号：US4896037A
公开(公告)日：1990-01-23
申请号：US912208
申请日：1986-09-25
申请人： Kazuo Shimura , Nobuyoshi Nakajima , Masamitsu Ishida
发明人： Kazuo Shimura , Nobuyoshi Nakajima , Masamitsu Ishida
IPC分类号： A61B6/00 , G01N23/04 , G01T1/00 , G03B42/02 , H05G1/62
CPC分类号： G03B42/021
摘要： A high-speed image recording apparatus comprises a sheet changer for changing a stimulable phosphor sheet at an image recording position, a radiation source drive controller, and a filter changer for changing a radiation filter on a radiation passage between a radiation source and a stimulable phosphor sheet at each image recording step. The sheet changer, the radiation source drive controller and the filter changer are activated by signals sent from a controller to load the stimulable phosphor sheet to the image recording position, to change over the radiation filter, and then to emit radiation to the stimulable phosphor sheet via an object, thereby recording a high energy image and a low energy image of good energy discrimination in stimulable phosphor sheets.
摘要翻译：高速图像记录装置包括用于在图像记录位置改变可刺激的荧光体片材的片材更换器，辐射源驱动控制器和用于改变辐射源和可刺激荧光体之间的辐射通道上的辐射滤光器的滤光器更换器在每个图像记录步骤。片材更换器，辐射源驱动控制器和滤波器更换器由从控制器发送的信号激活，将可刺激的荧光粉片装载到图像记录位置，以转换辐射过滤器，然后将辐射发射到可刺激的磷光体片从而在可刺激的荧光体片材中记录高能量图像和良好能量鉴别的低能量图像。

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