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    • 5. 发明申请
    • A METHOD AND SYSTEM FOR REDUCING ARTIFACTS IN A TOMOSYNTHESIS IMAGING SYSTEM
    • 一种用于减少TOMOSYNTHESIS成像系统中的ARTIFACTS的方法和系统
    • US20080008372A1
    • 2008-01-10
    • US11456183
    • 2006-07-07
    • Baojun LiXianfeng NiKadri Nizar Jabri
    • Baojun LiXianfeng NiKadri Nizar Jabri
    • G06K9/00G06K9/40
    • G06T11/006G06T2207/20104G06T2211/421
    • The present invention provides a method and system for reducing artifacts in tomosynthesis reconstructed images. The artifacts reduction method comprises back-projecting only a part of the projection image. The method includes acquiring plurality of projection images from different projection angles. It further includes identifying an area of interest of each projection image based on a predefined area and back project the area of interest of each projection image to reconstruct at least one three dimensional image. In an embodiment the area of interest of the projection image is identified based on field of view of the collimator. In another embodiment the invention provides a tomosynthesis system producing a 3-D image with reduced reducing artifacts.
    • 本发明提供了一种减少断层重构图像中伪像的方法和系统。 人造物减少方法包括仅投影投影图像的一部分。 该方法包括从不同的投影角度获取多个投影图像。 它还包括基于预定义区域识别每个投影图像的感兴趣区域,并且再次投影每个投影图像的感兴趣区域以重建至少一个三维图像。 在一个实施例中,基于准直器的视野来识别投影图像的感兴趣区域。 在另一个实施方案中,本发明提供了一种产生具有降低的减少伪影的3-D图像的断层合成系统。
    • 8. 发明授权
    • Slit collimator scatter correction
    • 狭缝准直器散射校正
    • US08000512B2
    • 2011-08-16
    • US11866878
    • 2007-10-03
    • John Michael SabolKadri Nizar JabriAdam Ellis BodenMeghan Lynn Yue
    • John Michael SabolKadri Nizar JabriAdam Ellis BodenMeghan Lynn Yue
    • G06K9/00H05G1/64
    • G01N23/20083A61B6/06A61B6/482A61B6/583G01N2223/401
    • A technique is presented for establishing a patient's BMD using a dual-energy X-ray imaging system. In the technique, the dual-energy X-ray imaging system utilizes a slit collimator to expose a series of portions of a region of interest within a patient with X-rays of two different energies. A flat-panel digital X-ray detector detects the X-rays passing through the patient's region of interest and produces data representative of the intensity of the X-rays reaching the detector. The image intensity data is corrected for scatter based on identifying the regions of the image intensity data that are produced from scatter only, and not primary X-rays. A first-order derivative of the image intensity data is used to identify these regions. A value for the intensity of the scatter at the boundary of the scatter-only region is established. The value for the intensity of the scatter at the boundary of the scatter-only region is used to estimate scatter intensity in the region of the image intensity data that is produced from primary X-rays, as well as scatter. To correct the image intensity data for scatter, the known and estimated scatter intensities are subtracted from the image intensity data.
    • 提出了一种使用双能X射线成像系统建立患者BMD的技术。 在该技术中,双能量X射线成像系统利用狭缝准直器,以两种不同能量的X射线来暴露患者内感兴趣区域的一系列部分。 平板数字X射线检测器检测穿过患者感兴趣区域的X射线,并产生代表到达检测器的X射线强度的数据。 基于识别仅由散射产生的图像强度数据的区域而不是主要X射线来对图像强度数据进行校正以进行散射。 使用图像强度数据的一阶导数来识别这些区域。 建立了散射区域边界散射强度的值。 在散射区域的边界处的散射强度的值用于估计从主X射线产生的图像强度数据的区域中的散射强度以及散射。 为了校正用于散射的图像强度数据,从图像强度数据中减去已知和估计的散射强度。
    • 10. 发明申请
    • SLIT COLLIMATOR SCATTER CORRECTION
    • SLIT COLLIMATOR SCATTER校正
    • US20090092307A1
    • 2009-04-09
    • US11866878
    • 2007-10-03
    • John Michael SabolKadri Nizar JabriAdam Ellis BodenMeghan Lynn Yue
    • John Michael SabolKadri Nizar JabriAdam Ellis BodenMeghan Lynn Yue
    • G06K9/00
    • G01N23/20083A61B6/06A61B6/482A61B6/583G01N2223/401
    • A technique is presented for establishing a patient's BMD using a dual-energy X-ray imaging system. In the technique, the dual-energy X-ray imaging system utilizes a slit collimator to expose a series of portions of a region of interest within a patient with X-rays of two different energies. A flat-panel digital X-ray detector detects the X-rays passing through the patient's region of interest and produces data representative of the intensity of the X-rays reaching the detector. The image intensity data is corrected for scatter based on identifying the regions of the image intensity data that are produced from scatter only, and not primary X-rays. A first-order derivative of the image intensity data is used to identify these regions. A value for the intensity of the scatter at the boundary of the scatter-only region is established. The value for the intensity of the scatter at the boundary of the scatter-only region is used to estimate scatter intensity in the region of the image intensity data that is produced from primary X-rays, as well as scatter. To correct the image intensity data for scatter, the known and estimated scatter intensities are subtracted from the image intensity data.
    • 提出了一种使用双能X射线成像系统建立患者BMD的技术。 在该技术中,双能量X射线成像系统利用狭缝准直器,以两种不同能量的X射线来暴露患者内感兴趣区域的一系列部分。 平板数字X射线检测器检测穿过患者感兴趣区域的X射线,并产生代表到达检测器的X射线强度的数据。 基于识别仅由散射产生的图像强度数据的区域而不是主要X射线来对图像强度数据进行校正以进行散射。 使用图像强度数据的一阶导数来识别这些区域。 建立了散射区域边界散射强度的值。 在散射区域的边界处的散射强度的值用于估计从主X射线产生的图像强度数据的区域中的散射强度以及散射。 为了校正用于散射的图像强度数据,从图像强度数据中减去已知和估计的散射强度。