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1.发明授权Method and system for calibrating an x-ray scanner by employing a single non-circular standard 失效通过采用单一非标准标准来校准X射线扫描仪的方法和系统
公开(公告)号：US5095431A
公开(公告)日：1992-03-10
申请号：US324545
申请日：1989-03-16
CPC分类号： A61B6/583 , G06T11/005
摘要： The invention relates to x-ray scanners and more particularly to a method for calibrating scanners by means of a single standard of elliptical shape, for example. Attenuation measurements are performed with respect to a number of principal angular positions of the scanner about the standard. In addition, a number of meaurements or views are taken on each side of this principal position in order to compute a mean attenuation with respect to each channel. The attenuation curve is then smoothed by filtering and polynomial approximation.
摘要翻译： 本发明涉及X射线扫描仪，更具体地说，涉及一种借助于椭圆形单一标准校准扫描仪的方法。 相对于关于标准的扫描器的多个主要角位置执行衰减测量。 此外，为了计算相对于每个通道的平均衰减，在该主要位置的每一侧进行多个美术或视图。 然后通过滤波和多项式近似平滑衰减曲线。
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公开(公告)号：US5216600A
公开(公告)日：1993-06-01
申请号：US426190
申请日：1989-10-25
CPC分类号： G06T11/005
摘要： A method for elimination of parasitic noise in an x-ray scanner consists of computing the mean value of the signals of the ten first views in a circuit (26). This mean value is subtracted from the signals of the first view V.sub.1 in a circuit (27) so as to obtain the high-frequency components H.sub.1 which are considered as parasitic noise. The signals H.sub.1 are filtered in a high-pass filter before being subtracted from the signals of the view V.sub.1 to obtain signals V'.sub.1 which are free of parasitic components. The signals V'.sub.1 are processed in a sequential circuit (31) in order to obtain signals V'.sub.2 which are free of parasitic component. The same process is repeated for the signals of the other views V.sub.3 to V.sub.m.
摘要翻译： 用于消除x射线扫描仪中的寄生噪声的方法包括计算电路（26）中的十个第一视图的信号的平均值。 在电路（27）中从第一视图V1的信号中减去该平均值，以获得被认为是寄生噪声的高频分量H1。 在从视图V1的信号中减去之前，将信号H1滤波在高通滤波器中，以获得没有寄生分量的信号V'1。 在顺序电路（31）中对信号V'1进行处理，以获得没有寄生成分的信号V'2。 对其他视图V3至Vm的信号重复相同的过程。
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3.发明授权Method and system for calibrating an x-ray scanner from the image of at least one calibration standard 失效用于从至少一个校准标准的图像校准X射线扫描仪的方法和系统
公开(公告)号：US5225979A
公开(公告)日：1993-07-06
申请号：US884453
申请日：1992-05-14
摘要： A method and a system for calibrating an x-ray scanner, in which the lengths d.sub.ij of x-ray paths are first computed by means of the image of the calibration standard. There are then computed both the theoretical attenuations Ac.sub.ij and the attenuations Am.sub.ij measured on the image. There are then deduced the coefficient of proportionality K between the values Ac.sub.ij and Am.sub.ij in order to obtain values of K.times.Ac.sub.i. The values KAc.sub.i and Am.sub.i are employed for calculating the corrections to be made per channel as a function of the attenuation.
摘要翻译： 一种用于校准x射线扫描仪的方法和系统，其中首先通过校准标准的图像计算x射线路径的长度dij。 然后计算理论衰减Acij和在图像上测量的衰减Amij。 然后推导出值Acij和Amij之间的比例系数K，以获得KxAci的值。 使用值KAci和Ami来计算作为衰减的函数的每通道的校正。
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4.发明授权Method and system for the calibration of an x-ray scanner using an off-centered circular phantom 失效使用非中心圆形透镜校准X射线扫描仪的方法和系统
公开(公告)号：US5214578A
公开(公告)日：1993-05-25
申请号：US362680
申请日：1989-06-07
CPC分类号： A61B6/583 , G06T11/005
摘要： A method and system to calibrate an X-ray scanner uses a single circular phantom. The circular phantom is off-centered with respect to the axis of rotation of the scanner so as to introduce different paths in the phantom for each channel, depending on the angular positions of the scanner. This results in different attenuation measurements which are compared with values obtained by the computation of the path lengths which depend on the off-centered coordinates r and .PHI. and on the position of the scanner, thus enabling computation of the polynomial approximation coefficients to be applied to the measurements.
摘要翻译： 用于校准X射线扫描仪的方法和系统使用单个圆形体模。 圆形体模相对于扫描仪的旋转轴线偏心，以便根据扫描仪的角度位置为每个通道在体模中引入不同的路径。 这导致了不同的衰减测量，其与通过计算取决于偏心坐标r和PHI的路径长度以及扫描仪的位置所获得的值进行比较，从而能够计算要应用到的多项式近似系数 测量。
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5.发明授权
公开(公告)号：US5056020A
公开(公告)日：1991-10-08
申请号：US406039
申请日：1989-09-12
CPC分类号： A61B6/032 , A61B6/4035 , H05G1/26
摘要： Disclosed is a method for the correction, in a scanner, of the defects due to the movements of the scanner. The method consists in having a rod which introduces a major attenuation and causing the scanner to make a full turn around a center of rotation O and obtaining m distinct views of the rod, each corresponding to an angular position .alpha..sub.j. The analysis of the signals of each view enables determining the angle .beta..sub.j of the rod. The knowledge of this angle .beta..sub.j leads to the computation of the coordinates b and c of the rod and the theoretical value .beta..sub.th of the angle .beta. for each view. The difference between the theoretical value .beta..sub.th and the measured value .beta..sub.j is used in the device for processing the scanner image.
摘要翻译： 公开了一种用于在扫描器中校正由于扫描仪的移动引起的缺陷的方法。 该方法包括具有引入主要衰减并导致扫描器围绕旋转中心O完全转动并且获得棒的不同视图的杆的每个对应于角度位置αj的杆。 对每个视图信号的分析使得能够确定杆的角度βj。 这个角度βj的知识导致计算棒的坐标b和c以及每个视图角度β的理论值βth。 在用于处理扫描仪图像的装置中使用理论值βth和测量值βj之间的差异。
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公开(公告)号：US09159124B2
公开(公告)日：2015-10-13
申请号：US13989158
申请日：2011-11-16
申请人： Liran Goshen , Asher Gringauz , Yechiel Lamash , Andrei Feldman , Guido Pardo-Roques , Jonathan Sapir
发明人： Liran Goshen , Asher Gringauz , Yechiel Lamash , Andrei Feldman , Guido Pardo-Roques , Jonathan Sapir
摘要： A method includes enhancing a contrast to noise ratio (CNR) of image data, generating CNR enhanced image data, wherein the CNR enhanced image data has a substantially same image quality as the image data. A computing system (118) includes a computer readable storage medium (122) encoded with computer readable instructions for enhancing a contrast to noise ratio (CNR) of image data and one or more processors (120), which, when executing the computer readable instructions, causes the computing system to enhance the CNR of the image data. A method includes generating CNR enhanced image data, wherein CNR enhanced image data has a substantially same noise level, noise power spectrum, and spatial resolution of the image data.
摘要翻译： 一种方法包括提高图像数据的对比度（CNR），生成CNR增强图像数据，其中CNR增强图像数据具有与图像数据基本相同的图像质量。 计算系统（118）包括用计算机可读指令编码的用于增强图像数据的对比度（CNR）和一个或多个处理器（120）的计算机可读存储介质（122），当执行计算机可读指令时 ，使计算系统增强图像数据的CNR。 一种方法包括生成CNR增强图像数据，其中CNR增强图像数据具有基本相同的噪声水平，噪声功率谱和图像数据的空间分辨率。
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公开(公告)号：US07574025B2
公开(公告)日：2009-08-11
申请号：US10501559
申请日：2003-01-16
申请人： Andrei Feldman
发明人： Andrei Feldman
CPC分类号： A61C1/084 , A61B6/5258 , A61C9/00 , A61C9/004 , A61C13/0004
摘要： A method for producing an artifact-corrected image of a negative jaw impression in a recipient jaw comprising, forming a negative impression of said recipient jaw, producing a first digital image of said negative jaw impression, producing a second digital image, including said artifacts of said negative jaw impression in said recipient jaw and using said first digital image to produce an artifact-corrected computer representation of said negative impression in said recipient jaw.
摘要翻译： 一种用于在接受者钳口中产生负颌印模的伪影校正图像的方法，包括形成所述接受者颚的负印象，产生所述负颌印象的第一数字图像，产生第二数字图像，所述第二数字图像包括所述伪像 所述接受者钳口中的所述负下巴印象，并且使用所述第一数字图像在所述接受者钳口中产生所述负面印象的伪影校正的计算机表示。
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公开(公告)号：US20130243348A1
公开(公告)日：2013-09-19
申请号：US13989158
申请日：2011-11-16
申请人： Liran Goshen , Asher Gringauz , Yechiel Lamash , Andrei Feldman , Guido Pardo-Roques , Jonathan Sapir
发明人： Liran Goshen , Asher Gringauz , Yechiel Lamash , Andrei Feldman , Guido Pardo-Roques , Jonathan Sapir
IPC分类号： G06T5/00
摘要： A method includes enhancing a contrast to noise ratio (CNR) of image data, generating CNR enhanced image data, wherein the CNR enhanced image data has a substantially same image quality as the image data. A computing system (118) includes a computer readable storage medium (122) encoded with computer readable instructions for enhancing a contrast to noise ratio (CNR) of image data and one or more processors (120), which, when executing the computer readable instructions, causes the computing system to enhance the CNR of the image data. A method includes generating CNR enhanced image data, wherein CNR enhanced image data has a substantially same noise level, noise power spectrum, and spatial resolution of the image data.
摘要翻译： 一种方法包括提高图像数据的对比度（CNR），生成CNR增强图像数据，其中CNR增强图像数据具有与图像数据基本相同的图像质量。 计算系统（118）包括用计算机可读指令编码的用于增强图像数据的对比度（CNR）和一个或多个处理器（120）的计算机可读存储介质（122），当执行计算机可读指令时 ，使计算系统增强图像数据的CNR。 一种方法包括生成CNR增强图像数据，其中CNR增强图像数据具有基本相同的噪声水平，噪声功率谱和图像数据的空间分辨率。
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9.发明授权Method to correct the measurement of the bone density in a scanner using a calibration phantom having two inserts 失效使用具有两个插入物的校准偏差校正扫描仪中骨密度测量的方法
公开(公告)号：US5222021A
公开(公告)日：1993-06-22
申请号：US552134
申请日：1990-07-13
申请人： Andrei Feldman , Philippe Giudici
发明人： Andrei Feldman , Philippe Giudici
CPC分类号： A61B6/583
摘要： The disclosure concerns X-ray scanners and, more particularly, a method to measure the bone density of a patient that takes his or her build into account. The disclosed method consists in performing a calibration of the bone density measurement by means of a phantom that simulates the patient's body and the vertebra an calibration phantom comprising a water insert and an insert with a high concentration of K.sub.2 HPO.sub.4. A measurement is made of the densities of several inserts of different concentrations and of the concentration of the water insert and of the K.sub.2 HPO.sub.4 high concentration insert, in the presence and without the presence of the bag of water, enabling the computation of corrections of the measured density of the patient's vertebra depending on his or her build.
摘要翻译： 本公开涉及X射线扫描仪，更具体地，涉及一种测量患者的骨密度的方法，该患者将其构建考虑在内。 所公开的方法包括通过模拟患者身体和椎骨的包括水插入物和具有高浓度K 2 HPO 4的插入物的校准体模进行骨密度测量的校准。 在存在和不存在水袋的情况下，测量不同浓度的几种插入物的浓度以及水插入物和K 2 HPO 4高浓度插入物的浓度，使得能够计算所测量的 患者脊椎的密度取决于他或她的构造。
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公开(公告)号：US08135194B2
公开(公告)日：2012-03-13
申请号：US12535466
申请日：2009-08-04
申请人： Andrei Feldman
发明人： Andrei Feldman
CPC分类号： A61C1/084 , A61B6/5258 , A61C9/00 , A61C9/004 , A61C13/0004
摘要： A method for producing an artifact-corrected image of negative jaw impression in a recipient jaw comprising, forming a negative impression of said recipient jaw, producing a first digital image of said negative jaw impression, producing a second digital image, including said artifacts of said negative jaw impression in said recipient jaw and using said first digital image to produce an artifact-corrected computer representation of said negative impression in said recipient jaw.
摘要翻译： 一种用于在接受者钳口中产生负颌印模的伪影校正图像的方法，包括形成所述接受者颚部的负印象，产生所述负颌印象的第一数字图像，产生第二数字图像，所述第二数字图像包括所述 在所述接受者钳口中使用所述第一数字图像，以在所述接受者钳口中产生所述负面印象的伪影校正的计算机表示。
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