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    • 1. 发明授权
    • Procedure for deriving a three-dimensional digital mask starting from a series of two-dimensional masks, plus a device for doing this
    • 从一系列二维掩模开始的三维数字掩模的推导以及用于执行此操作的设备的步骤
    • US08335809B2
    • 2012-12-18
    • US12339209
    • 2008-12-19
    • Giovanni PalmaSerge MullerRazvan Iordache
    • Giovanni PalmaSerge MullerRazvan Iordache
    • G06F17/17G06K9/00
    • G06T11/005A61B6/027G06T2207/10112G06T2207/30068
    • A derivation procedure for a three-dimensional digital mask from a series of two-dimensional masks in a radiographic device containing a source (S) of X-rays, a means of recording and a volume of interest hat contains the object to be X-rayed located between the source (S) and the means of recording consists of an extrapolation of each mask Mθ2 includes determining a last segment 1fin beyond the limits of the means of recording; and working out a two-dimensional mask Mγ associated with a position Sγ of the source, for any angle γ included in the angular range θ2 to θ1 (a position close to θ2). For every parallel segment 1 located between segment d (or d′ respectively) and segment 1fin, the procedure further includes deriving a three-dimensional mask (21) of the object for each voxel at the intersection of plane P1θ2 and the volume of interest; and projecting the three-dimensional mask onto the segment 1.
    • 一种用于在包含X射线源(S)的X射线照相装置中的一系列二维掩模的三维数字掩模的导出程序,记录装置和感兴趣的体积, 位于源(S)和记录装置之间的射线包括每个掩模M&的外插; 2包括确定超出记录装置限制的最后段lfin; 并且对于包括在角度范围&角度中的任何角度γ,生成与源的位置Sγ相关联的二维掩模Mγ; 2至& thetas; 1(接近于&thetas; 2的位置)。 对于位于段d(或d')和段lfin之间的每个并行段1,该过程还包括在平面P1和坐标2与所关心的体积的交点处导出每个体素的对象的三维掩模; 并将三维掩模投射到片段1上。
    • 3. 发明授权
    • Method and apparatus for calibration and correction of gray levels in images
    • 用于校正和校正图像中灰度级的方法和装置
    • US07548640B2
    • 2009-06-16
    • US12115596
    • 2008-05-06
    • Fanny JeunehommeSerge MullerRazvan Iordache
    • Fanny JeunehommeSerge MullerRazvan Iordache
    • G06K9/00
    • G06T5/50A61B6/583G06T2207/10116G06T2207/30004H04N5/32
    • A method and apparatus for calibrating an apparatus that acquires a sequence of radiographic images and correcting images of an object under observation. For each image of a sequence acquired by the apparatus and for a given frequency of acquisition of the sequence, the apparatus is calibrated by determining the value of the variation of a mean of gray levels in at least one zone of interest of the current image of at least one calibration device, the variation being determined relative to the mean gray level of the first image of the sequence in each zone of interest. The determination of the variation is reiterated for a series of images sequences acquired using calibration devices resulting in first images of mean gray levels different from one sequence to another. Each image of an image sequence of the object under observation is corrected, comprising zones of observation having different gray levels by subtracting from the current image the variation of one gray level relative to the first image of the object, the subtraction being a function of the gray level considered from each zone of observation.
    • 一种用于校准获取放射线图像序列并校正被观察物体的图像的装置的方法和装置。 对于由装置获取的序列和给定的序列获取频率的每个图像,通过确定当前图像的当前图像的至少一个感兴趣区域中的灰度级的平均值的变化值来校准装置 至少一个校准装置,相对于感兴趣区域中序列的第一图像的平均灰度级确定变化。 对于使用校准装置获得的一系列图像序列,重复了变化的确定,导致不同于一个序列到另一个序列的平均灰度级的第一图像。 通过从当前图像中减去相对于对象的第一图像的一个灰度级的变化,校正观察对象的图像序列的每个图像,包括具有不同灰度级的观察区域,该减法是 从每个观察区考虑灰度。
    • 6. 发明申请
    • Method and Apparatus for Calibration and Correction of Gray Levels in Images
    • 图像灰度校正和校正方法与装置
    • US20080205738A1
    • 2008-08-28
    • US12115596
    • 2008-05-06
    • Fanny JeunehommeSerge MullerRazvan Iordache
    • Fanny JeunehommeSerge MullerRazvan Iordache
    • G06K9/00
    • G06T5/50A61B6/583G06T2207/10116G06T2207/30004H04N5/32
    • A method and apparatus for calibrating an apparatus that acquires a sequence of radiographic images and correcting images of an object under observation. For each image of a sequence acquired by the apparatus and for a given frequency of acquisition of the sequence, the apparatus is calibrated by determining the value of the variation of a mean of gray levels in at least one zone of interest of the current image of at least one calibration device, the variation being determined relative to the mean gray level of the first image of the sequence in each zone of interest. The determination of the variation is reiterated for a series of images sequences acquired using calibration devices resulting in first images of mean gray levels different from one sequence to another. Each image of an image sequence of the object under observation is corrected, comprising zones of observation having different gray levels by subtracting from the current image the variation of one gray level relative to the first image of the object, the subtraction being a function of the gray level considered from each zone of observation.
    • 一种用于校准获取放射线图像序列并校正被观察物体的图像的装置的方法和装置。 对于由装置获取的序列和给定的序列获取频率的每个图像,通过确定当前图像的当前图像的至少一个感兴趣区域中的灰度级的平均值的变化值来校准装置 至少一个校准装置,相对于感兴趣区域中序列的第一图像的平均灰度级确定变化。 对于使用校准装置获得的一系列图像序列,重复了变化的确定,导致不同于一个序列到另一个序列的平均灰度级的第一图像。 通过从当前图像中减去相对于对象的第一图像的一个灰度级的变化,校正观察对象的图像序列的每个图像,包括具有不同灰度级的观察区域,该减法是 从每个观察区考虑灰度。
    • 8. 发明申请
    • Method and apparatus for calibration and correction of gray levels in images
    • 用于校正和校正图像中灰度级的方法和装置
    • US20050031180A1
    • 2005-02-10
    • US10775912
    • 2004-02-10
    • Fanny JeunehommeSerge MullerRazvan Iordache
    • Fanny JeunehommeSerge MullerRazvan Iordache
    • A61B6/00G06K9/00G06K9/40G06T5/50H04N5/32H04N5/325
    • G06T5/50A61B6/583G06T2207/10116G06T2207/30004H04N5/32
    • A method and apparatus for calibrating an apparatus that acquires a sequence of radiographic images and correcting images of an object under observation. For each image of a sequence acquired by the apparatus and for a given frequency of acquisition of the sequence, the apparatus is calibrated by determining the value of the variation of a mean of gray levels in at least one zone of interest of the current image of at least one calibration device, the variation being determined relative to the mean gray level of the first image of the sequence in each zone of interest. The determination of the variation is reiterated for a series of images sequences acquired using calibration devices resulting in first images of mean gray levels different from one sequence to another. Each image of an image sequence of the object under observation is corrected, comprising zones of observation having different gray levels by subtracting from the current image the variation of one gray level relative to the first image of the object, the subtraction being a function of the gray level considered from each zone of observation.
    • 一种用于校准获取放射线图像序列并校正被观察物体的图像的装置的方法和装置。 对于由装置获取的序列和给定的序列获取频率的每个图像,通过确定当前图像的当前图像的至少一个感兴趣区域中的灰度级的平均值的变化值来校准装置 至少一个校准装置,相对于感兴趣区域中序列的第一图像的平均灰度级确定变化。 对于使用校准装置获得的一系列图像序列,重复了变化的确定,导致不同于一个序列到另一个序列的平均灰度级的第一图像。 通过从当前图像中减去相对于对象的第一图像的一个灰度级的变化,校正观察对象的图像序列的每个图像,包括具有不同灰度级的观察区域,该减法是 从每个观察区考虑灰度。
    • 9. 发明申请
    • MEDICAL IMAGING PROCESS FOR TRIPLE-ENERGY MODELING, AND DEVICE FOR IMPLEMENTING SUCH A PROCESS
    • 用于三重能量建模的医学成像过程,以及用于实现这一过程的设备
    • US20110019891A1
    • 2011-01-27
    • US12839436
    • 2010-07-20
    • Sylvie PuongSerge MullerRazvan IordacheXavíer Bouchevreau
    • Sylvie PuongSerge MullerRazvan IordacheXavíer Bouchevreau
    • G06K9/00
    • A61B6/482A61B6/405A61B6/502A61B6/542
    • A method for X-ray imaging of a body using an imaging device comprising an image sensor and an X-ray emitter which operates at different emission spectra, wherein the method includes: acquiring a first image resulting from the passage through the body of X-rays emitted by the X-ray emitter with a first emission spectrum; calculating characteristics of the body on the basis of the first image, and calculating a second and a third emission spectrum based on the characteristics of the body, wherein the first, second and third emission spectra are distinct from one another; acquiring a second and third image resulting from the passage through the body of X-rays emitted by the X-ray emitter with the second and third emission spectrum respectively; and modeling the body by generating thickness charts for different materials comprising the body on the basis of the three images.
    • 一种用于使用包括图像传感器和在不同发射光谱下操作的X射线发射器的成像装置对人体进行X射线成像的方法,其中所述方法包括:获取由穿过X射线体的通道产生的第一图像, 由X射线发射器发射的具有第一发射光谱的射线; 基于第一图像计算身体的特征,以及基于身体的特性计算第二和第三发射光谱,其中第一,第二和第三发射光谱彼此不同; 获取由分别具有第二和第三发射光谱的由X射线发射器发射的X射线体穿过的第二和第三图像; 并通过基于三个图像生成包括身体的不同材料的厚度图来对身体进行建模。