公开(公告)号：US5187731A

公开(公告)日：1993-02-16

申请号：US858634

申请日：1992-03-27

申请人： Kazuo Shimura

发明人： Kazuo Shimura

IPC分类号： A61B6/00 ,  G01N23/04 ,  G01N33/50 ,  G01T1/29 ,  G21K4/00 ,  H04N5/325

CPC分类号： A61B6/482 ,  A61B6/583 ,  G01N23/04 ,  G01T1/2012 ,  A61B6/4035 ,  A61B6/505

摘要： Radiation images are recorded with several kinds of radiation having different energy distributions and having passed through an object and a bone calcium reference material composed of sections simulating amounts of bone calcium varying step-wise, the object being constituted of bones and soft tissues. A bone image, in which only the patterns of the bones are formed or emphasized, is formed from the radiation images. A difference between a mean value of image signal components, which represent part of the pattern of each section of the bone calcium reference material in the bone image, and a mean value of background signal components, which represent areas in the vicinity of the pattern of each section of the bone calcium reference material, is calculated. A difference between a mean value of image signal components, which represent a pattern of a specific part of the bones in the bone image, and a mean value of background signal components, which represent areas in the vicinity of the pattern of the specific part of the bones, is calculated. The difference value calculated for the specific part of the bones is compared with the difference values calculated for the sections of the bone calcium reference material.

摘要翻译： 用具有不同能量分布并已经通过物体的几种辐射记录辐射图像，并且由逐步变化的骨钙的部分组成的骨钙参考材料组成，该对象由骨骼和软组织构成。 由辐射图像形成仅形成或强调骨骼的图案的骨骼图像。 表示骨骼图像中的骨钙参考物质的各部分的图案的一部分的图像信号成分的平均值与背景信号成分的平均值之间的差， 每个部分的骨钙参考物质，是计算的。 表示骨骼图像中的骨骼的特定部位的图案的图像信号成分的平均值与背景信号成分的平均值之间的差，其表示特定部位的图案附近的区域 骨头是计算的。 将针对骨骼的特定部分计算的差值与针对骨钙参考材料的切片计算的差值进行比较。

公开(公告)号：US5060081A

公开(公告)日：1991-10-22

申请号：US325176

申请日：1989-03-17

申请人： Kazuo Shimura

发明人： Kazuo Shimura

IPC分类号： G03B42/02 ,  A61B6/00 ,  G06T1/00 ,  G06T5/00 ,  G06T5/40

CPC分类号： G06T5/40 ,  G06T5/009 ,  G06T2207/10116

摘要： A method of adjusting a read-out condition and/or an image processing condition for a radiation image comprises the steps of carrying out preliminary read out prior to carrying out final read out for obtaining an image signal which represents a radiation image stored on a stimulable phosphor sheet and which is to be used for reproducing a visible radiation image, and creating a histogram of a preliminary read-out image signal obtained by the preliminary read out. An image information range, which is necessary for reproducing the visible radiation image, is determined from the histogram. A read-out condition and/or an image processing condition is adjusted in accordance with a latitude of the image information range so that a latitude of the reproduced visible image is changed so as to widen nonlinearly when the latitude of the image information range widens.

摘要翻译： 调整放射线图像的读取条件和/或图像处理条件的方法包括以下步骤：在进行最终读出之前进行预备读出，以获得表示存储在可刺激的辐射图像上的图像信号 荧光粉片，用于再现可见光图像，并且创建通过预读出获得的初步读出图像信号的直方图。 从直方图确定再现可见光图像所需的图像信息范围。 根据图像信息范围的纬度来调整读出条件和/或图像处理条件，使得当图像信息范围的纬度变宽时，再现的可见图像的纬度被改变，以便非线性地变宽。

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。

公开(公告)号：US5028784A

公开(公告)日：1991-07-02

申请号：US507287

申请日：1990-04-10

申请人： Satoshi Arakawa ,  Wataru Ito ,  Kazuo Shimura ,  Toshitaka Agano

发明人： Satoshi Arakawa ,  Wataru Ito ,  Kazuo Shimura ,  Toshitaka Agano

IPC分类号： G06T5/00 ,  H04N1/409

CPC分类号： H04N1/409 ,  A61B6/5258 ,  G06T5/002 ,  G06T5/10 ,  G06T5/20 ,  G06T2200/12 ,  G06T2207/10116 ,  G06T2207/20056

摘要： A method for generating a radiation image signal comprises the steps of detecting an image signal by reading out a radiation image, which has been recorded on a recording medium during an image recording operation using a grid and which comprises an object image and a striped grid image corresponding to the grid and superposed upon the object image. The image signal is sampled such that a plurality of image signal components are obtained which correspond to a plurality of discrete points on the radiation image, intervals between the discrete points varying irregularly from predetermined intervals at least along a direction intersecting the striped pattern of the grid image on the radiation image.

摘要翻译： 一种用于产生放射线图像信号的方法包括以下步骤：通过读出在使用网格的图像记录操作期间已经记录在记录介质上的辐射图像来检测图像信号，并且包括对象图像和条纹网格图像 对应于网格并叠加在物体图像上。 图像信号被采样，使得获得与辐射图像上的多个离散点相对应的多个图像信号分量，离散点之间的间隔至少沿着与网格的条纹图案相交的方向从预定间隔不规则地变化 放射图像上的图像。

公开(公告)号：US4992664A

公开(公告)日：1991-02-12

申请号：US324788

申请日：1989-03-17

申请人： Kazuo Shimura ,  Yuuma Adachi

发明人： Kazuo Shimura ,  Yuuma Adachi

IPC分类号： A61B6/00 ,  G21K4/00 ,  H04N1/387 ,  H04N1/393 ,  H04N1/407

CPC分类号： H04N1/393 ,  H04N1/3873 ,  H04N1/4072 ,  G21K4/00

摘要： In a radiation image recording and reproducing system for recording a radiation image of an object on a recording medium, obtaining an image signal by reading out the radiation image and sampling the image information read out, carrying out image processing of the image signal, and reproducing a visible image from the processed image signal, a radiation image read-out method comprises the steps of changing the sampling density in accordance with characteristics of the recorded radiation iamge. A radiation image processing method comprises the steps of changing the magnification of the visible image in accordance with characteristics of the recorded radiation image. A radiation image reproducing method comprises the steps of changing the reproducing density, the number of visible images reproduced on a single recording sheet or the number of recoridng sheets, on which the visible image reproduced, in accordance with characteristics of the recorded radiation image.

摘要翻译： 在用于将物体的放射线图像记录在记录介质上的放射线图像记录和再现系统中，通过读取放射线图像并对读出的图像信息进行采样，执行图像信号的图像处理和再现来获得图像信号 来自经处理的图像信号的可见图像，放射线图像读出方法包括根据记录的辐射iamge的特性来改变采样密度的步骤。 放射线图像处理方法包括根据记录的放射线图像的特性改变可视图像的放大率的步骤。 放射线图像再现方法包括以下步骤：根据记录的放射线图像的特性，改变再现密度，在单个记录片材上再现的可见图像的数量或重新生成片材的数量，再现可视图像。

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

IPC分类号： G01T1/29 ,  G06T5/40

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。

公开(公告)号：US4887305A

公开(公告)日：1989-12-12

申请号：US169703

申请日：1988-03-18

申请人： Kazuo Shimura

发明人： Kazuo Shimura

IPC分类号： A61B6/00 ,  G03B42/02 ,  G03C5/16 ,  G06T1/00 ,  G06T5/40 ,  H04N1/04 ,  H04N1/19

CPC分类号： G06T5/40 ,  G03B42/02 ,  G03C5/16 ,  G06T5/009 ,  G06T2207/10116

摘要： A method of adjusting read-out processing conditions for a radiation image comprises the steps of calculating the maximum image signal level Smax and the minimum image signal level Smin of a desired image information range from image signals for condition adjustment which represent a radiation image, and adjusting the read-out processing conditions on the basis of the maximum image signal level Smax and the minimum image signal level Smin thus calculated. At least one of the maximum image signal level Smax and the minimum image signal level Smin is determined on the basis of a difference histogram of the image signals for condition adjustment.

摘要翻译： 一种调整放射线图像读出处理条件的方法，包括以下步骤：从表示放射线图像的条件调整用图像信号中计算期望图像信息范围的最大图像信号电平Smax和最小图像信号电平Smin， 根据这样计算的最大图像信号电平Smax和最小图像信号电平Smin来调整读出处理条件。 基于用于条件调整的图像信号的差异直方图来确定最大图像信号电平Smax和最小图像信号电平Smin中的至少一个。

公开(公告)号：US4851675A

公开(公告)日：1989-07-25

申请号：US920179

申请日：1986-10-17

申请人： Shigeru Saotome ,  Masamitsu Ishida ,  Kazuo Shimura ,  Hideo Watanabe

发明人： Shigeru Saotome ,  Masamitsu Ishida ,  Kazuo Shimura ,  Hideo Watanabe

IPC分类号： H04N1/04 ,  G01T1/29 ,  G03B42/02 ,  G06T1/00 ,  H04N1/407

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。

公开(公告)号：US4761739A

公开(公告)日：1988-08-02

申请号：US838862

申请日：1986-03-12

申请人： Kazuo Shimura

发明人： Kazuo Shimura

IPC分类号： H04N1/407 ,  A61B6/00 ,  G01T1/00 ,  G01T1/29 ,  G03B42/02 ,  G06T1/00 ,  G06T5/40 ,  G06T5/50 ,  H04N1/409 ,  H04N5/32 ,  H05G1/60 ,  H05B33/12 ,  G06F15/68

CPC分类号： H05G1/60 ,  G01T1/2014 ,  G06T5/009 ,  G06T5/40 ,  G06T5/50 ,  H04N5/3205 ,  G06T2207/10116

摘要： In energy subtraction processing, a high energy image signal SH and a low energy image signal SL are detected from two sets of stimulable phosphor sheets respectively carrying a high energy image and a low energy image of the same object stored thereon. A difference signal Ssub for forming an image of a specific structure of the object is calculated as Ssub=a.multidot.SH-b.multidot.SL+c. The value c is adjusted to a value calculated as c=m.multidot.Smax+n.multidot.Smin-a(m.multidot.SHmax+n.multidot.SHmin)+b(m.multidot.SLmax+n.multidot.SLmin) where Smax and Smin respectively denote the maximum density signal and the minimum density signal representing the maximum density and the minimum density desired in the subtraction image formed by the difference signal Ssub, SHmax and SHmin respectively denote the maximum value and the minimum value of the high energy image signal SH, SLmax and SLmin respectively denote the maximum value and the minimum value of the low energy image signal SL, and m and n respectively denote a constant including O.

摘要翻译： 在能量减法处理中，从分别承载存储在其上的同一物体的高能量图像和低能量图像的两组可刺激的荧光体片材中检测出高能量图像信号SH和低能量图像信号SL。 用于形成对象的特定结构的图像的差分信号Ssub被计算为Ssub = axSH-bxSL + c。 将值c调整为计算为c = mxSmax + nxSmin-a（mxSHmax + nxSHmin）+ b（mxSLmax + nxSLmin）的值，其中Smax和Smin分别表示表示最大密度的最大密度信号和最小密度信号， 由差分信号Ssub，SHmax和SHmin形成的减法图像中期望的最小浓度分别表示高能图像信号SH，SLmax和SLmin的最大值和最小值分别表示低能量的最大值和最小值 图像信号SL，m和n分别表示包括O的常数。