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公开(公告)号：US4896037A
公开(公告)日：1990-01-23
申请号：US912208
申请日：1986-09-25
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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2.发明授权Energy subtraction processing method using weighted average of plural stacked sheets for creating high energy image 失效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
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。
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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：US4777373A
公开(公告)日：1988-10-11
申请号：US82930
申请日：1987-08-10
申请人： Kazuo Shimura , Masamitsu Ishida
发明人： Kazuo Shimura , Masamitsu Ishida
CPC分类号： G01T1/2012 , Y10T307/944
摘要： A built-in type radiation image and read-out apparatus comprises a circulating and conveying means for repeatedly conveying stimulable phosphor sheets through an image recording section, an image read-out section and an erasing section. The image recording section has a transfer means for adjusting the distance between an object support member and a stimulable phosphor sheet retainer, whereby recording of enlarged radiation image is possible.
摘要翻译： 内置型放射线图像和读出装置包括用于通过图像记录部分，图像读出部分和擦除部分反复地传送可刺激的磷光体片的循环和传送装置。 图像记录部分具有用于调节对象支撑构件和可刺激的荧光体片保持器之间的距离的转印装置，由此可以记录放大的图像。
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公开(公告)号：US4914295A
公开(公告)日：1990-04-03
申请号：US302992
申请日：1989-01-30
申请人： Kazuo Shimura , Masamitsu Ishida
发明人： Kazuo Shimura , Masamitsu Ishida
CPC分类号： G01T1/2014 , G06T5/009 , G06T5/40 , G06T2207/10116
摘要： An apparatus for photoelectrically detecting a radiation image of an object stored on a stimulable phosphor sheet by exposure to a radiation passing through the object and storing detected image signals comprises a circuit for recognizing an irradiation field on the stimulable phosphor sheet, and an image signal selection circuit for receiving irradiation field information generated by the irradiation field recognition circuit and selecting only the image signals inside of the irradiation field from the read-out image signals. Or, the apparatus comprises a section for creating a histogram of the read-out image signals, a histogram analysis section for determining a range of the read-out image signals outside of a peak region arising in the vicinity of the maximum signal value or the minimum signal value in the histogram, and an image signal selection circuit for receiving the output of the histogram analysis section and selecting only the image signals within the range from the read-out image signals.
摘要翻译： 一种用于通过暴露于穿过物体的辐射并存储检测到的图像信号来光电检测存储在可刺激的荧光粉片上的物体的放射线图像的装置包括用于识别可刺激的荧光粉片上的照射场的电路和图像信号选择 电路，用于接收由照射场识别电路产生的照射场信息，并且仅从读出的图像信号中仅选择照射场内的图像信号。 或者，该装置包括用于创建读出的图像信号的直方图的部分，用于确定在最大信号值附近出现的峰值区域之外的读出图像信号的范围的直方图分析部分， 直方图中的最小信号值，以及用于接收直方图分析部分的输出并仅从读出的图像信号中选择该范围内的图像信号的图像信号选择电路。
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公开(公告)号：US4851675A
公开(公告)日：1989-07-25
申请号：US920179
申请日：1986-10-17
CPC分类号： H04N1/4074 , G01T1/2014 , G03B42/02
摘要： In a radiation image read-out method and apparatus, a stimulable phosphor sheet carrying a radiation image stored thereon is exposed to stimulating rays which cause the stimulable phosphor sheet to emit light in proportion to the stored radiation energy, and the emitted light is photoelectrically detected by a photodetector to obtain image signals. The detection range of the photodetector for the emitted light is adjusted to a range substantially wider than an expected light emission range. The image signals obtained with the detection range by the photodetector is stored in a storage device, and sent to a histogram analysis device for creating a histogram of the image signals and analyzing image input information on the stimulable phosphor sheet based on the histogram. An image signal in a range useful for reproduction of a visible image is extracted from the image signals stored in the storage device on the basis of the image input information obtained by the histogram analysis device, and utilized for reproducing the visible image.
摘要翻译： 在放射线图像读取方法和装置中，将存储在其上的放射线图像的可刺激的荧光体片暴露于刺激光线，使得可激发的荧光体片材与存储的辐射能量成比例地发光，并且发射的光被光电检测 通过光电检测器获得图像信号。 用于发射的光的光检测器的检测范围被调整到比预期的发光范围宽得多的范围。 通过光电检测器检测范围获得的图像信号被存储在存储装置中，并被发送到直方图分析装置，用于创建图像信号的直方图，并且基于直方图分析可刺激的磷光体片上的图像输入信息。 基于由直方图分析装置获得的图像输入信息，从存储在存储装置中的图像信号中提取对可见图像的再现有用的范围内的图像信号，并用于再现可视图像。
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公开(公告)号：US4859849A
公开(公告)日：1989-08-22
申请号：US787846
申请日：1985-10-16
申请人： Kazuo Shimura , Masamitsu Ishida
发明人： Kazuo Shimura , Masamitsu Ishida
CPC分类号： G03B42/02 , G01T1/2012 , H05G1/26
摘要： A radiation image recording and read-out apparatus comprises a circulation transfer means for transferring a stimulable phosphor sheet along a predetermined circulation path; an image recording section which is disposed in the circulation path and in which a radiation image of an object is recorded on the stimulable phosphor sheet by exposing the stimulable phosphor sheet to radiation passing through the object; an image read-out section which is disposed in the circulation path for scanning the stimulable phosphor sheet with stimulating rays and detecting light emitted from the stimulable phosphor sheet to obtain an image signal; and an erasing section which is disposed in the circulation path and releases residual radiation energy in the stimulable phosphor sheet before the stimulable phosphor sheet is returned to the image recording section. The radiation image recording and read-out apparatus further includes a radiation quality changing filter for changing the quality of the radiation. The filter is arranged to be inserted into or retracted away from the path of the radiation in synchronization with the operation of a stimulable phosphor sheet changing mechanism for discharging one stimulable phosphor sheet from the recording position in the image recording section and positioning another sheet in the recording section.
摘要翻译： 辐射图像记录和读出装置包括：循环传送装置，用于沿着预定的循环路径传送可刺激的荧光粉片; 图像记录部，其设置在所述循环路径中，并且通过将所述可刺激的荧光体片暴露于穿过所述物体的辐射而将所述物体的放射线图像记录在所述可刺激的荧光体片上; 图像读出部，其设置在循环路径中，用于以刺激光线扫描可刺激的荧光体片，并检测从可刺激的荧光体片发射的光以获得图像信号; 以及擦除部，其设置在循环路径中，并且在可刺激的磷光体片返回到图像记录部之前释放可刺激的荧光体片中的残留辐射能。 放射线图像记录和读出装置还包括用于改变辐射质量的辐射质量改变滤波器。 该过滤器被布置成与用于从图像记录部分中的记录位置排出一个可刺激的磷光体片的可刺激的磷光体片改变机构的操作同步地插入或缩回远离辐射的路径，并将另一个片材定位在 录音部分。
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公开(公告)号：US4857732A
公开(公告)日：1989-08-15
申请号：US789293
申请日：1985-10-18
申请人： Kazuo Shimura , Masamitsu Ishida
发明人： Kazuo Shimura , Masamitsu Ishida
CPC分类号： G03B42/02 , G01T1/2012
摘要： Stimulable phosphor sheets are circulated through an image recording section for recording radiation images on the stimulable phosphor sheets, an image read-out section for scanning the stimulable phosphor sheets by stimulating rays and detecting light emitted thereby upon stimulation, and a erasing section for releasing radiation energy remaining on the stimulable phosphor sheets after read-out. The recording section is provided with at least two slits positioned such that at least one slit is located on either side of the object and drive means for synchronously driving the slits, whereby it is possible to obtain recorded radiation images free from the effect of scattered radiation. The circulation of sheets is achieved using a plurality of independently controlled conveyors operating at different speeds for frictionally conveying the individual sheets correlated to the time required for processing the sheets at separate image recording, image read-out and image erasing stations, borne by respective conveyors at those stations.
摘要翻译： 可刺激的荧光体片通过用于在可刺激的荧光体片上记录辐射图像的图像记录部分循环，用于通过刺激光线扫描可刺激的荧光片并检测刺激时发射的光的图像读出部分和用于释放辐射的擦除部分 读出后剩余在可刺激的磷光体片上的能量。 记录部设置有至少两个狭缝，定位成使得至少一个狭缝位于物体的任一侧上，并且驱动装置用于同步驱动狭缝，由此可以获得没有散射辐射的影响的记录的辐射图像 。 纸张的循环通过使用多个独立控制的输送机来实现，该输送机以不同的速度操作，用于摩擦地输送与分别的图像记录，图像读出和图像擦除站处理纸张所需的时间相关的各个纸张，由相应的输送机承载 在那些车站。
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公开(公告)号：US5122664A
公开(公告)日：1992-06-16
申请号：US691900
申请日：1991-04-26
申请人： Wataru Ito , Nobuyoshi Nakajima , Kazuo Shimura
发明人： Wataru Ito , Nobuyoshi Nakajima , Kazuo Shimura
IPC分类号： G01T1/29
CPC分类号： G01T1/2012
摘要： At least two stimulable phosphor sheets are exposed to at least two kinds of radiation, which have different energy distributions, without an object intervening between the stimulable phosphor sheets and a source of the radiation. The stimulable phosphor sheets are then exposed to stimulating rays, which cause them to emit light in proportion to the amount of energy stored thereon during their exposure to the radiation. The light emitted is photoelectrically detected, and digital image signals are thereby obtained, which are to be used for compensating for nonuniformity in how the radiation is irradiated to the stimulable phosphor sheets. Digital image signals representing radiation images of an object stored with at least two kinds of radiation and the corresponding digital image signals for the compensation are then subtracted from each other, and digital image signals are obtained which are free of noise due to nonuniformity in how at least two kinds of radiation are irradiated to the stimulable phosphor sheets. The digital image signals, which are free of noise, are then subtracted from each other, and a difference signal is thereby obtained which represents the image of only the bones represented by the radiation images. Bone calcium in the bones is quantitatively analyzed by utilizing the difference signal.
摘要翻译： 至少两种可刺激的荧光体片材暴露于具有不同能量分布的至少两种辐射，而不会在可刺激的磷光体片材和辐射源之间插入物体。 然后将可刺激的荧光体片暴露于刺激光线，这使得它们在暴露于辐射期间与其上存储的能量的量成比例地发光。 发光的光被光电检测，从而获得数字图像信号，这些信号用于补偿辐射如何照射到可刺激的荧光体片上的不均匀性。 表示用至少两种辐射存储的物体的放射线图像的数字图像信号和用于补偿的相应的数字图像信号被相互减去，并且获得数字图像信号，其由于不均匀性而无噪声 将至少两种辐射照射到可刺激的荧光体片上。 然后将没有噪声的数字图像信号相互减去，从而获得表示仅由辐射图像表示的骨骼的图像的差分信号。 通过利用差异信号对骨骼中的骨钙进行定量分析。
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公开(公告)号：US5046147A
公开(公告)日：1991-09-03
申请号：US422483
申请日：1989-10-17
CPC分类号： G01T1/2014 , G06T5/009 , H05G1/60 , G06T2207/10116 , G06T2207/30004
摘要： A radiation image is processed in a radiation image read-out and reproducing system wherein a read-out operation is carried out in which a stimulable phosphor sheet having a radiation image stored thereon is exposed to stimulating rays, which cause the stimulable phosphor sheet to emit light in proportion to the amount of energy stored thereon during exposure to radiation, and wherein the emitted light is photoelectrically detected and a read-out image signal which represent the radiation image is thereby obtained, said read-out image signal being used to reproduce the radiation image as a visible image. A radiation image processing method comprises the steps of calculating characteristic values, which serve as tools in the extraction of only those image signal components related to a diagnosis, or the like, from the read-out image signal, and carrying out transformation processing on the read-out image signal, the exact nature of the transformation depending on the characteristic values. A read-out gain and/or a scale factor is corrected with the transformation processing. The signal obtained after the transforming processing is carried out on the read-out image signal is used to reproduce the radiation image as a visible image.
摘要翻译： 在放射线图像读出再现系统中对放射线图像进行处理，其中执行读出操作，其中具有存储在其上的具有放射线图像的可刺激的荧光体片材暴露于刺激的射线，这使得可刺激的荧光体片材发射 与曝光于其中的能量存储量成比例的光，其中发射的光被光电检测，并且由此获得表示放射线图像的读出图像信号，所述读出的图像信号用于再现 辐射图像作为可视图像。 放射线图像处理方法包括以下步骤：从读出的图像信号中计算作为仅提取与诊断相关的那些图像信号分量等的工具的特征值，并对其进行变换处理 读出图像信号，转换的确切性质取决于特征值。 通过变换处理校正读出增益和/或比例因子。 在读出的图像信号上进行变换处理后获得的信号用于再现作为可视图像的放射线图像。
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