公开(公告)号：US07218705B2

公开(公告)日：2007-05-15

申请号：US11165775

申请日：2005-06-25

Applicant: Ping Xue ,  Donald F Langler

Inventor： Ping Xue ,  Donald F Langler

IPC: H05G1/64

CPC classification number: G03B42/023 ,  H04N5/32 ,  H04N5/3651

Abstract: Systems and methods are provided for offset correction of images from a flat panel detector. In some embodiments, the apparatus and method develops one or more offset maps, acquired during system idle, for the imaging system at a plurality of exposure windows. In some embodiments, exposure parameters acquired for the imaging system before image acquisition are used to select an offset map to subtract from subsequent X-ray images. In some further embodiments, executable instructions are disclosed for directing a processor to compile one or more offset map and exposure parameters to subtract based on a selected offset map noise elements from X-ray images and thereby minimizing the time between image acquisition and display of processed images.

Abstract translation: 提供了系统和方法用于偏移校正来自平板检测器的图像。 在一些实施例中，该装置和方法开发在多个曝光窗口处的成像系统的系统空闲期间获取的一个或多个偏移映射。 在一些实施例中，使用在图像获取之前为成像系统获取的曝光参数来选择偏移映射以从后续X射线图像中减去。 在一些另外的实施例中，公开了可执行指令，用于指示处理器编译一个或多个偏移映射和曝光参数，以便基于来自X射线图像的所选择的偏移映射噪声元素减去，从而最小化图像获取和处理的显示之间的时间 图片。

公开(公告)号：US07013037B2

公开(公告)日：2006-03-14

申请号：US10323967

申请日：2002-12-18

Applicant: Vincent S. Polkus ,  Thomas M. Leeds ,  Mohamed Ali Hamadeh ,  Ping Xue

Inventor： Vincent S. Polkus ,  Thomas M. Leeds ,  Mohamed Ali Hamadeh ,  Ping Xue

IPC: G06K9/00

CPC classification number: A61B6/587 ,  A61B6/08

Abstract: A technique for selectively processing data from a digital detector includes determining an image area produced by orientation of a radiation source assembly. The assembly may include a radiation source and a collimator, which may be separately orientable. The image area is computed based upon the orientation of the radiation source assembly that projects a radiation beam towards an imaging plane. Image data from a detector within the imaging plane is selectively processed to improve computational efficiency. The system may also determine whether the image area falls within the imaging surface of the detector and inform an operator or inhibit an exposure if such is not the case.

Abstract translation: 用于从数字检测器选择性地处理数据的技术包括确定由辐射源组件的取向产生的图像区域。 组件可以包括可以单独定向的辐射源和准直器。 基于将辐射束投影到成像平面的辐射源组件的取向来计算图像区域。 选择性地处理来自成像平面内的检测器的图像数据，以提高计算效率。 系统还可以确定图像区域是否落入检测器的成像表面内，并且如果不是这种情况，则通知操作者或抑制曝光。

公开(公告)号：US06792159B1

公开(公告)日：2004-09-14

申请号：US09474498

申请日：1999-12-29

Applicant: Richard Aufrichtig ,  Kenneth Scott Kump ,  Ping Xue

Inventor： Richard Aufrichtig ,  Kenneth Scott Kump ,  Ping Xue

IPC: G06K940

CPC classification number: H04N5/367 ,  H04N5/32

Abstract: A detector imaging system having an apparatus and method for correcting defective pixels in a current acquired image is disclosed herein. The system performs the correction of defective pixels using image feature information and temporal information. The system includes a correction scheme which includes determining a temporal matrix based on the current acquired image, at least one prior acquired image, and a filter weight; determining a local gradient based in part on the temporal matrix and a gradient kernel; and providing a correction value based on the local gradient to correct the defective pixel. The correction scheme is repeated a plurality of times as desired to correct all the defective pixels in the current acquired image.

Abstract translation: 本文公开了一种具有用于校正当前获取的图像中的有缺陷像素的装置和方法的检测器成像系统。 该系统使用图像特征信息和时间信息来执行缺陷像素的校正。 该系统包括校正方案，其包括基于当前获取的图像确定时间矩阵，至少一个先前获取的图像和滤波器权重; 部分地基于时间矩阵和梯度核确定局部梯度; 以及基于所述局部梯度提供校正值以校正所述缺陷像素。 校正方案根据需要多次重复以校正当前获取的图像中的所有缺陷像素。

公开(公告)号：US06621887B2

公开(公告)日：2003-09-16

申请号：US09977474

申请日：2001-10-15

Applicant: Douglas Albagli ,  Brian David Yanoff ,  John Eric Tkaczyk ,  George Edward Possin ,  Ping Xue

Inventor： Douglas Albagli ,  Brian David Yanoff ,  John Eric Tkaczyk ,  George Edward Possin ,  Ping Xue

IPC: G03C900

CPC classification number: H04N5/361 ,  A61B6/583 ,  A61B6/585 ,  H04N5/325

Abstract: In one aspect of the invention a method for processing a fluoroscopic image is provided. The method includes scanning an object with an imaging system including at least one radiation source and at least one detector array, acquiring a plurality of dark images to generate a baseline image, acquiring a plurality of lag images subsequent to the baseline image, determining a plurality of parameters of a power law using at least one lag image and at least one baseline image, and performing a log—log extrapolation of the power law including the determined parameters.

Abstract translation: 在本发明的一个方面，提供了一种用于处理透视图像的方法。 该方法包括用包括至少一个辐射源和至少一个检测器阵列的成像系统扫描对象，获取多个暗图像以生成基线图像，获取基线图像之后的多个滞后图像，确定多个 使用至少一个滞后图像和至少一个基线图像的功率律的参数，以及执行包括确定的参数的幂定律的对数对数外推。

公开(公告)号：US06408046B2

公开(公告)日：2002-06-18

申请号：US09751041

申请日：2000-12-29

Applicant: Renuka Uppaluri ,  John R. Lamberty ,  Ping Xue ,  Kenneth S. Kump ,  Lloyd W. Ison

Inventor： Renuka Uppaluri ,  John R. Lamberty ,  Ping Xue ,  Kenneth S. Kump ,  Lloyd W. Ison

IPC: G01N2304

CPC classification number: A61B6/542 ,  A61B6/00 ,  A61B6/4233 ,  H05G1/36

Abstract: In an X-ray imaging system comprising an X-ray source, a digital X-ray detector and a display device, an arrangement is provided for setting or establishing the dynamic range of the image at the display device. The detector is operated to provide a set of count values representing X-ray image data acquired by the detector from an object of imaging, and a set of standardized values, such as optical density values, is derived from the count values. The optical density values collectively define a range of optical density values, and the dynamic range of the display device is mapped thereto. The display device is enabled to present an image of the object which appears similar to or substantially the same as an image of the object presented by, for example, a specified analog X-ray film.

Abstract translation: 在包括X射线源，数字X射线检测器和显示装置的X射线成像系统中，提供了用于在显示装置处设置或建立图像的动态范围的布置。 操作检测器以提供一组计数值，表示由检测器从成像对象获取的X射线图像数据，并从计数值导出一组标准化值，例如光密度值。 光密度值共同地限定了光密度值的范围，并且将显示装置的动态范围映射到其上。 显示装置能够呈现与由例如指定的模拟X射线胶片呈现的对象的图像相似或基本相同的对象的图像。