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1. 发明授权

US4837686A Substance quantification in animal bodies 失效
标题翻译：物质定量在动物体内
公开(公告)号：US4837686A
公开(公告)日：1989-06-06
申请号：US798458
申请日：1985-11-15
申请人： Richard A. Sones , Karen L. Lauro , Gary T. Barnes , Mike M. Tesic
发明人： Richard A. Sones , Karen L. Lauro , Gary T. Barnes , Mike M. Tesic
IPC分类号： A61B6/00 , G01N23/04 , G06T7/00
CPC分类号： A61B6/482 , G06T7/0012 , A61B6/583 , G06T2207/30061
摘要： A system and method is disclosed for utilizing image pixel value information generated by a digital radiographic system for quantifying the amount of calcium in a particular object of interest within a subject, wherein the subject also contains additional quantities of calcium located at positions such that the additional calcium interfers with the acquisition of data describing the object of interest. A cursor configured as a parallelogram is described and pixel values are summed along lines parallel to the sides of the parallelogram. A profile is generated from these summations. A portion of the profile corresponding to pixel lines not intersecting the object of interest is used to estimate the contribution of background and other calcium to the profile as a whole, and this estimated value is subtracted from the total profile. Integration of the remainder of the profile provides a scalar value corresponding to the amount of calcium in the object of interest.
摘要翻译：公开了一种用于利用由数字放射照相系统产生的图像像素值信息来定量受试者内的特定感兴趣对象中的钙的量的系统和方法，其中所述对象还含有位于所述附加位置处的附加量的钙钙介质与获取描述感兴趣对象的数据。描述配置为平行四边形的光标，并且将像素值沿平行于平行四边形的边的线相加。从这些求和中生成一个配置文件。使用对应于不与感兴趣对象相交的像素线的轮廓的一部分来估计背景和其他钙作为整体的轮廓的贡献，并且从总轮廓中减去该估计值。轮廓的其余部分的整合提供了与感兴趣对象中的钙量相对应的标量值。

2. 发明授权

US4891757A Medical imaging system and method having gray scale mapping means for indicating image saturation regions 失效
标题翻译：具有用于指示图像饱和区域的灰度映射装置的医学成像系统和方法
公开(公告)号：US4891757A
公开(公告)日：1990-01-02
申请号：US852023
申请日：1986-04-14
申请人： Robert E. Shroy, Jr. , Karen L. Lauro , Richard A. Sones
发明人： Robert E. Shroy, Jr. , Karen L. Lauro , Richard A. Sones
IPC分类号： A61B8/00 , A61B5/055 , A61B6/00 , A61B10/00 , G06T1/00 , G06T5/40 , H04N5/32
CPC分类号： G06T5/008 , G06T5/40 , H04N5/32 , G06T2207/10116 , Y10S378/901
摘要： An artifact inducing image acquisition mapping system and technique is described for use in connection with digital imaging. A gray scale mapping technique is employed to indicate to an operator the brightness function of each pixel of an image. Where the brightness function is less than 95% of saturation, the image is displayed normally. Where the brightness function is at least equal to the saturation full scale value, that portion of the image is displayed in total black. Where the brightness function is between 95% and 100% of saturation full scale value, the image portion is displayed as mixed dark and light, i.e., a speckled region. An alternate embodiment simply displays saturated regions to total black.
摘要翻译：描述了用于与数字成像有关的伪影诱导图像采集映射系统和技术。使用灰度映射技术向操作者指示图像的每个像素的亮度函数。当亮度函数小于饱和度的95％时，图像会正常显示。在亮度函数至少等于饱和满刻度值的地方，图像的该部分以黑色显示。在亮度函数为饱和满刻度值的95％至100％之间的情况下，图像部分显示为混合暗和光，即斑点区域。另一实施例简单地将饱和区域显示为总黑色。

3. 发明授权

US4789930A Energy dependent gain correction for radiation detection 失效
标题翻译：用于辐射检测的能量相关增益校正
公开(公告)号：US4789930A
公开(公告)日：1988-12-06
申请号：US798428
申请日：1985-11-15
申请人： Richard A. Sones , Karen L. Lauro
发明人： Richard A. Sones , Karen L. Lauro
IPC分类号： A61B6/00 , G01N23/04 , H05G1/26 , H05G1/60 , G01T1/20
CPC分类号： H05G1/26 , A61B6/583 , H05G1/60
摘要： A method and apparatus for calibrating the detector gain of a dual energy digital radiography system is provided. A basis material calibration object is scanned to create low and high energy pixel data. A regression is performed on the pixel data to derive at least one high energy calibration vector and at least one low energy calibration vector. The calibration vectors are transformed into high and low energy gain functions represented by a Taylor series expansion. An examination object is scanned to create low and high energy image data. The image data is combined with the gain function to create corrected low and high energy image data.
摘要翻译：提供了一种用于校准双能量数字射线照相系统的检测器增益的方法和装置。扫描基础材料校准对象以创建低能量和高能量像素数据。对像素数据执行回归以得到至少一个高能量校准矢量和至少一个低能量校准矢量。校准矢量被转换成由泰勒级数展开表示的高能量和低能量增益函数。扫描检查对象以创建低能量和高能量图像数据。图像数据与增益函数组合以产生校正的低能量和高能量图像数据。

4. 发明授权

US4792900A Adaptive filter for dual energy radiographic imaging 失效
标题翻译：自适应滤波器用于双能量射线成像
公开(公告)号：US4792900A
公开(公告)日：1988-12-20
申请号：US935282
申请日：1986-11-26
申请人： Richard A. Sones , Karen L. Lauro
发明人： Richard A. Sones , Karen L. Lauro
IPC分类号： G01N23/04 , A61B6/00 , A61B6/03 , G06T1/00 , G06T5/50 , H04N7/18 , G06F15/42
CPC分类号： A61B6/482 , A61B6/4241 , G06T5/50 , A61B6/032 , A61B6/4291 , A61B6/583
摘要： A radiographic scanner (A) generates a high energy image representation which is stored in a high energy image matrix (V) and a low energy image representation which is stored in a low energy image memory (U). A pair of filter functions selecting circuits (C) select a first or soft tissue specific filter function and second or bone specific filter function, respectively. The soft tissue filter function selecting circuit selects and adjusts the soft tissue filter function in accordance with the pixel value of the low energy image representation for each corresponding pair of pixel values. Convolvers (44, 46) convolve pixel values from the high and low energy image representations with the selected and adjusted filter functions. A soft tissue transform function (48) transforms the filtered high and low energy image representations into a soft tissue or other material specific image representation (42). The other filter selecting and adjusting circuit selects and adjusts the bone specific filter functions which are convolved with the high and low energy image representations by convolvers (54, 56). A bone specific transform function (58) transforms the filtered high and low energy image representations into a bone basis image.
摘要翻译：放射线照相扫描仪（A）产生存储在高能量图像矩阵（V）中的高能量图像表示和存储在低能量图像存储器（U）中的低能量图像表示。一对滤波器功能选择电路（C）分别选择第一或软组织特异滤器功能和第二或骨特异滤器功能。软组织滤波器功能选择电路根据每个对应的像素值对的低能量图像表示的像素值来选择和调整软组织滤波器功能。卷积器（44,46）将来自高和低能量图像表示的像素值与选择和调整的滤波器函数进行卷积。软组织变换函数（48）将经滤波的高能和低能量图像变换成软组织或其他材料特定图像表示（42）。另一个滤波器选择和调整电路选择和调整与特定的骨骼特异性滤波器函数，这些函数与卷积器（54,56）的高能量和低能量图像表示卷积。骨特异性变换函数（58）将滤波的高能量和低能量图像表示变换为骨骼基础图像。

5. 发明授权

US4980904A Radiation imaging calibration 失效
标题翻译：辐射成像校准
公开(公告)号：US4980904A
公开(公告)日：1990-12-25
申请号：US219905
申请日：1988-07-13
申请人： Richard A. Sones , Karen L. Lauro , Rodney A. Mattson
发明人： Richard A. Sones , Karen L. Lauro , Rodney A. Mattson
IPC分类号： A61B6/00 , G21K1/10 , H05G1/26 , H05G1/60
CPC分类号： A61B6/583 , A61B6/482 , G21K1/10 , H05G1/26 , H05G1/60 , A61B6/4266
摘要： An apparatus and method is disclosed for facilitating calibration of a dual energy digital radiography system having a focused multi-element detector assembly. The apparatus includes two sets of calibration elements, each set made of a different basis material. Each calibration element defines a segment of an annulus and is positionable between the system source and detector such that the center defined by the annulus is substantially coincident with the focal spot of the source. Within individual sets, the thicknesses of the respective member elements differ one from another in accordance with a binary progression. Each of the calibration elements is positioned and sized such that it intercepts and attenuates all radiation which ultimately falls upon the detector.
摘要翻译：公开了一种便于校准具有聚焦多元件检测器组件的双能数字射线照相系统的装置和方法。该装置包括两组校准元件，每组由不同的基础材料制成。每个校准元件限定环形部分并且可定位在系统源和检测器之间，使得由环形部分限定的中心基本上与源的焦斑重合。在单独的组中，各个构件元件的厚度根据二进制进程彼此不同。每个校准元件的定位和尺寸使得其截取并衰减最终落在检测器上的所有辐射。

6. 发明授权

US4872188A Registration correction for radiographic scanners with sandwich detectors 失效
标题翻译：具有三明治检测器的射线照相扫描仪的注册校正
公开(公告)号：US4872188A
公开(公告)日：1989-10-03
申请号：US126165
申请日：1987-11-27
申请人： Karen L. Lauro , Richard A. Sones
发明人： Karen L. Lauro , Richard A. Sones
IPC分类号： A61B6/00 , H04N5/32 , H04N5/335 , H05G1/26
CPC分类号： H04N5/335 , H04N5/3205 , H05G1/26 , A61B6/583
摘要： A fan beam of radiation (12) is projected on first and second detector arrays (18, 20). The detector arrays and fan beam are swept across a phantom (D). Fine wires (82) in the phantom each cast shadows over fractions of a plurality of the detectors during the sweep. Phantom images (44, 46) are generated from the first and second detector arrays with corresponding pixels of each image corresponding to the same path between a radiation source (10) and corresponding detectors in the arrays. A linear interpolation (50) interpolates the pixels of one of the images to shift their effective spatial position. A transform means (52) transforms the linear interpolated and second phantom image into at least one composite image (54). The linear interpolation is iteratively adjusted (C) to minimize phase change artifacts in corresponding pixels of the composite image. After the appropriate interpolation for each detector or group of detectors has been determined, the appropriate linear interpolations are stored (72). Thereafter, the stored linear interpolations are utilized each time a subject is examined.
摘要翻译：扇形辐射束（12）投影在第一和第二检测器阵列（18,20）上。探测器阵列和风扇光束扫过幻影（D）。每个幻影中的细线（82）在扫描期间都会对多个检测器的分数进行阴影。从第一和第二检测器阵列产生幻影图像（44,46），其中每个图像的对应像素对应于辐射源（10）和阵列中的相应检测器之间的相同路径。线性内插（50）内插图像之一的像素以移动它们的有效空间位置。变换装置（52）将线性插值和第二幻影图像变换为至少一个合成图像（54）。线性内插被迭代地调整（C）以最小化合成图像的相应像素中的相变伪影。在确定每个检测器或检测器组的适当内插之后，存储适当的线性内插（72）。此后，每次检查受试者时利用所存储的线性内插。

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