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公开(公告)号：US07286631B2
公开(公告)日：2007-10-23
申请号：US11339067
申请日：2006-01-25
申请人： Baojun Li , Rowland Saunders , John Sandrik , Xianfeng Ni
发明人： Baojun Li , Rowland Saunders , John Sandrik , Xianfeng Ni
IPC分类号： A61B6/00
CPC分类号： A61B6/583 , A61B6/025 , G06T11/005 , G06T2211/436
摘要： A method and apparatus for tomosynthesis image quality control for a tomosynthesis imaging system. The method and apparatus including: positioning a phantom having an edge of predetermined sharpness at a predetermined angle relative to an imaging plane of an x-ray detector; performing tomosynthesis acquisition and generating one or more slice images using one or more three-dimensional reconstruction algorithms; selecting a slice image to be measured from the one or more slice images; identifying a sharpest edge in the slice image to be measured, wherein the sharpest edge in the slice image to be measured includes the in-focus portion of the phantom; inputting the slice image to be measured and coordinates of the sharpest edge in the slice image to be measured into a modulation transfer function (MTF) algorithm; and, using the MTF algorithm, calculating the in-plane resolution and slice thickness of the slice image to be measured.
摘要翻译： 一种用于断层合成成像系统的层析合成图像质量控制的方法和装置。 所述方法和装置包括：相对于X射线检测器的成像平面将具有预定锐度的边缘的假想物体以预定角度定位; 执行层析合成获取并使用一个或多个三维重建算法生成一个或多个切片图像; 从所述一个或多个切片图像中选择要测量的切片图像; 识别要测量的切片图像中的最锐边，其中要测量的切片图像中的最锐边包括体模的对焦部分; 将要测量的切片图像和要测量的切片图像中最锐边的坐标输入调制传递函数（MTF）算法; 并使用MTF算法计算要测量的切片图像的面内分辨率和切片厚度。
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公开(公告)号：US20060120506A1
公开(公告)日：2006-06-08
申请号：US11339067
申请日：2006-01-25
申请人： Baojun Li , Rowland Saunders , John Sandrik , Xianfeng Ni
发明人： Baojun Li , Rowland Saunders , John Sandrik , Xianfeng Ni
CPC分类号： A61B6/583 , A61B6/025 , G06T11/005 , G06T2211/436
摘要： The present invention provides a method and apparatus for tomosynthesis image quality control for a tomosynthesis imaging system, the method and apparatus addressing the measurement of in-plane resolution and slice thickness, via the measurement of modulation transfer function (MTF), the method and apparatus including: positioning a phantom having an edge of predetermined sharpness at a predetermined angle relative to an imaging plane of an x-ray detector; performing tomosynthesis acquisition and generating one or more slice images using one or more three-dimensional reconstruction algorithms; selecting a slice image to be measured from the one or more slice images; identifying a sharpest edge in the slice image to be measured, wherein the sharpest edge in the slice image to be measured includes the in-focus portion of the phantom; inputting the slice image to be measured and coordinates of the sharpest edge in the slice image to be measured into an MTF algorithm; and, using the MTF algorithm, calculating the in-plane resolution and slice thickness of the slice image to be measured.
摘要翻译： 本发明提供了通过调制传递函数（MTF）的测量，方法和装置，用于层析合成成像系统的层析合成图像质量控制的方法和装置，该方法和装置解决了平面内分辨率和切片厚度的测量。 包括：相对于X射线检测器的成像平面将具有预定锐度的边缘的假想物以预定角度定位; 执行层析合成获取并使用一个或多个三维重建算法生成一个或多个切片图像; 从所述一个或多个切片图像中选择要测量的切片图像; 识别要测量的切片图像中的最锐边，其中要测量的切片图像中的最锐边包括体模的对焦部分; 将要测量的切片图像和要测量的切片图像中最锐边的坐标输入到MTF算法中; 并使用MTF算法计算要测量的切片图像的面内分辨率和切片厚度。
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公开(公告)号：US07515682B2
公开(公告)日：2009-04-07
申请号：US11345918
申请日：2006-02-02
申请人： Baojun Li , Stephen W. Metz , Jiang Hsieh , Yogesh Srinivas , Xianfeng Ni , Tabb Patz
发明人： Baojun Li , Stephen W. Metz , Jiang Hsieh , Yogesh Srinivas , Xianfeng Ni , Tabb Patz
IPC分类号： A61B6/03
摘要： A method for creating a variable slice thickness for displaying an imaged object is disclosed. The method includes acquiring a plurality of projection images from a plurality of different projection angles within a defined sweep angle, reconstructing a plurality of object images from the plurality of projection images, each object image having a first slice thickness, and applying a function rule to combine images, whole images or portions thereof or attributes thereof, of the plurality of projection images, of the plurality of object images, or of both, thereby providing for the display of the object utilizing a second slice thickness that varies from the first slice thickness.
摘要翻译： 公开了一种用于创建用于显示成像对象的可变切片厚度的方法。 该方法包括从定义的扫描角度内的多个不同投影角度获取多个投影图像，从多个投影图像重构多个对象图像，每个对象图像具有第一切片厚度，并将功能规则应用于 组合多个投影图像中的多个对象图像或两者的图像，整个图像或其部分或其属性，从而利用从第一切片厚度变化的第二切片厚度来提供对象的显示 。
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公开(公告)号：US20070183564A1
公开(公告)日：2007-08-09
申请号：US11345918
申请日：2006-02-02
申请人： Baojun Li , Stephen Metz , Jiang Hsieh , Yogesh Srinivas , Xianfeng Ni , Tabb Patz
发明人： Baojun Li , Stephen Metz , Jiang Hsieh , Yogesh Srinivas , Xianfeng Ni , Tabb Patz
摘要： A method for creating a variable slice thickness for displaying an imaged object is disclosed. The method includes acquiring a plurality of projection images from a plurality of different projection angles within a defined sweep angle, reconstructing a plurality of object images from the plurality of projection images, each object image having a first slice thickness, and applying a function rule to combine images, whole images or portions thereof or attributes thereof, of the plurality of projection images, of the plurality of object images, or of both, thereby providing for the display of the object utilizing a second slice thickness that varies from the first slice thickness.
摘要翻译： 公开了一种用于创建用于显示成像对象的可变切片厚度的方法。 该方法包括从定义的扫描角度内的多个不同投影角度获取多个投影图像，从多个投影图像重构多个对象图像，每个对象图像具有第一切片厚度，并将功能规则应用于 组合多个投影图像中的多个对象图像或两者的图像，整个图像或其部分或其属性，从而利用从第一切片厚度变化的第二切片厚度来提供对象的显示 。
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5.发明申请公开(公告)号：US20060215809A1
公开(公告)日：2006-09-28
申请号：US11088019
申请日：2005-03-22
申请人： Xianfeng Ni , Baojun Li , Xu Zhang
发明人： Xianfeng Ni , Baojun Li , Xu Zhang
CPC分类号： A61B6/025 , G01N23/044 , G01N2223/419
摘要： Certain embodiments of the present invention include methods and systems for improved motion and angulation profiles in tomosynthesis. A method includes designating a target with a first and second dimension. An x-ray beam is projected onto at least a portion of the target. The x-ray beam has an origin with a position along the first dimension. The x-ray beam also has a beam axis, a projection area, and an angle ∅ representative of an angular distance between the beam axis and the at least a portion of the target. The method further includes varying the angle ∅ based at least in part on the position of the origin along the first dimension. The angle ∅ is varied to substantially maintain the projection area.
摘要翻译： 本发明的某些实施方案包括用于在层析合成中改善运动和角度分布的方法和系统。 一种方法包括用第一和第二维度指定目标。 X射线束投射到目标的至少一部分上。 X射线束具有沿着第一维度的位置的原点。 X射线束还具有光束轴，投影区域和角度ø，其代表光束轴线和目标物体的至少一部分之间的角距离。 该方法还包括至少部分地基于原点沿着第一维度的位置改变角度ø。 角度ø变化以基本上保持投影面积。
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6.发明申请A METHOD AND SYSTEM FOR REDUCING ARTIFACTS IN A TOMOSYNTHESIS IMAGING SYSTEM 审中-公开一种用于减少TOMOSYNTHESIS成像系统中的ARTIFACTS的方法和系统公开(公告)号：US20080008372A1
公开(公告)日：2008-01-10
申请号：US11456183
申请日：2006-07-07
申请人： Baojun Li , Xianfeng Ni , Kadri Nizar Jabri
发明人： Baojun Li , Xianfeng Ni , Kadri Nizar Jabri
CPC分类号： G06T11/006 , G06T2207/20104 , G06T2211/421
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US20130136235A1
公开(公告)日：2013-05-30
申请号：US13308317
申请日：2011-11-30
申请人： James Zhengshe Liu , Kenneth Scott Kump , Gireesha C. Rao , Francisco Ruiz Gomez , Xianfeng Ni , Rowland Frederick Saunders
发明人： James Zhengshe Liu , Kenneth Scott Kump , Gireesha C. Rao , Francisco Ruiz Gomez , Xianfeng Ni , Rowland Frederick Saunders
CPC分类号： A61B6/4233 , A61B6/4283 , A61B6/4405 , A61B6/4494 , A61B6/56
摘要： A portable detector for use with an imaging system is disclosed. The portable detector automatically sets one or more operational states based on at least a determination as to whether the portable detector is connected to external power. An imaging system is also disclosed that ascertains whether the portable detector is connected via a tether. The imaging system may perform a compatibility check when connected to the portable detector to assess compatibility between the imaging system and the portable detector.
摘要翻译： 公开了一种用于成像系统的便携式检测器。 便携式检测器至少基于关于便携式检测器是否连接到外部电源的确定来自动设置一个或多个操作状态。 还公开了一种确定便携式检测器是否经由系绳连接的成像系统。 当连接到便携式检测器时，成像系统可以执行兼容性检查，以评估成像系统和便携式检测器之间的兼容性。
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公开(公告)号：US06439769B1
公开(公告)日：2002-08-27
申请号：US09681315
申请日：2001-03-16
IPC分类号： H05G102
CPC分类号： A61B6/4464 , A61B6/08 , A61B6/4233 , A61B6/547
摘要： A system and method for automatically positioning an image receptor based on the position of a manually positioned diagnostic source assembly in an X-ray imaging device is provided. In a preferred embodiment of the automated tracking system, an operator manually positions a diagnostic source assembly (DSA) over the area of a patient to be imaged. Sensors in the diagnostic source assembly transmit the position of the DSA to a system controller. The system controller then calculates an optimal position of an image receptor based on the position of the DSA. Once the optimal position is calculated, the system controller sends the optimal position to a motor drive, which positions the image receptor in the calculated optimal position. Position sensors in the image receptor then send positional data of the image receptor to the system controller, which verifies that the image receptor is in the calculated optimal position. If the operator wishes to manually adjust the image receptor, they may override the motor drive and do so. The automated tracking system provides for reduced total imaging time and increased cost effectiveness over prior X-ray imaging systems by reducing the number of retakes required to obtain a satisfactory X-ray image. Reducing retakes also results in decreased exposure to radiation by the patient being imaged which is healthier to the patient.
摘要翻译： 提供了一种用于基于手动定位的诊断源组件在X射线成像装置中的位置来自动定位图像接收器的系统和方法。 在自动跟踪系统的优选实施例中，操作者手动地将诊断源组件（DSA）放置在待成像的患者的区域上。 诊断源组件中的传感器将DSA的位置传输到系统控制器。 然后，系统控制器基于DSA的位置来计算图像接收器的最佳位置。 一旦计算出最佳位置，系统控制器将最佳位置发送到电机驱动器，将电机驱动器定位在计算的最佳位置。 图像接收器中的位置传感器然后将图像接收器的位置数据发送到系统控制器，该系统控制器验证图像接收器处于计算的最佳位置。 如果操作员希望手动调整图像接收器，它们可能会覆盖电机驱动器并进行此操作。 自动跟踪系统通过减少获得令人满意的X射线图像所需的重复次数，提供了比现有X射线成像系统更少的总成像时间和更高的成本效益。 减少复位也导致被成像的患者的辐射暴露减少，这对患者更健康。
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公开(公告)号：US09101316B2
公开(公告)日：2015-08-11
申请号：US13308317
申请日：2011-11-30
申请人： James Zhengshe Liu , Kenneth Scott Kump , Gireesha C. Rao , Francisco Ruiz Gomez , Xianfeng Ni , Rowland Frederick Saunders
发明人： James Zhengshe Liu , Kenneth Scott Kump , Gireesha C. Rao , Francisco Ruiz Gomez , Xianfeng Ni , Rowland Frederick Saunders
CPC分类号： A61B6/4233 , A61B6/4283 , A61B6/4405 , A61B6/4494 , A61B6/56
摘要： A portable detector for use with an imaging system is disclosed. The portable detector automatically sets one or more operational states based on at least a determination as to whether the portable detector is connected to external power. An imaging system is also disclosed that ascertains whether the portable detector is connected via a tether. The imaging system may perform a compatibility check when connected to the portable detector to assess compatibility between the imaging system and the portable detector.
摘要翻译： 公开了一种用于成像系统的便携式检测器。 便携式检测器至少基于关于便携式检测器是否连接到外部电源的确定来自动设置一个或多个操作状态。 还公开了一种确定便携式检测器是否经由系绳连接的成像系统。 当连接到便携式检测器时，成像系统可以执行兼容性检查，以评估成像系统和便携式检测器之间的兼容性。
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公开(公告)号：US20100290707A1
公开(公告)日：2010-11-18
申请号：US12777414
申请日：2010-05-11
申请人： Dejun Wang , Huanzhong Li , Tiantian Zhang , Xianfeng Ni , Kadri Jabri
发明人： Dejun Wang , Huanzhong Li , Tiantian Zhang , Xianfeng Ni , Kadri Jabri
CPC分类号： A61B6/469 , A61B6/4441 , A61B6/5241
摘要： An image acquisition method includes determining the starting position, the ending position of a region of interest, and the value of overlap of the region of interest in the two adjacent sub-images, calculating the number of the sub-images required to be captured, the component of field of view at the direction of tube movement and the positions of the tube and the detector corresponding to each sub-image based on the starting position and the ending position of a region of interest and the value of the overlap. The method also includes moving the tube and the detector to each position and capturing the region of interest to obtain sub-images at the positions, and pasting the several sub-images together to form an image of the said region of interest.
摘要翻译： 图像获取方法包括：确定两个相邻子图像中的起始位置，感兴趣区域的结束位置和感兴趣区域的重叠值，计算需要被捕获的子图像的数量， 基于感兴趣区域的开始位置和结束位置以及重叠值，在管移动方向上的视场的分量以及管和检测器对应于每个子图像的位置。 该方法还包括将管和检测器移动到每个位置并捕获感兴趣区域以获得位置处的子图像，并将多个子图像粘贴在一起以形成所述感兴趣区域的图像。
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