公开(公告)号：US07054407B1

公开(公告)日：2006-05-30

申请号：US11053762

申请日：2005-02-08

Applicant: Jianying Li ,  Jiang Hsieh

Inventor： Jianying Li ,  Jiang Hsieh

IPC: H05G1/26

CPC classification number: A61B6/032 ,  A61B6/4085 ,  A61B6/542

Abstract: A methods and apparatus for reconstructing images are provided. The apparatus includes a CT imaging system configured to scan an anatomy to acquire path-length information, determine at least one threshold value using the acquired path length information, dynamically adjusting the threshold based on clinical applications and scan parameters, and perform a low signal correction on data obtained from scanning the anatomy using the determined threshold value.

Abstract translation: 提供了重建图像的方法和装置。 该装置包括CT成像系统，被配置为扫描解剖结构以获取路径长度信息，使用获取的路径长度信息确定至少一个阈值，基于临床应用和扫描参数动态调整阈值，并执行低信号校正 关于使用确定的阈值从解剖结构扫描获得的数据。

公开(公告)号：US20060062485A1

公开(公告)日：2006-03-23

申请号：US10944097

申请日：2004-09-17

Applicant: Jianying Li ,  Jiang Hsieh ,  Xiangyang Tang ,  Darin Okerlund ,  Melissa Vass ,  Kelly Mohr

Inventor： Jianying Li ,  Jiang Hsieh ,  Xiangyang Tang ,  Darin Okerlund ,  Melissa Vass ,  Kelly Mohr

IPC: G06K9/40 ,  G06K9/00

CPC classification number: G06T5/20 ,  G06T3/0056 ,  G06T11/008 ,  Y10S128/922

Abstract: A method and system for filtering medical images is described. The described method of filtering medical images includes receiving image data including a plurality of images from an image scan, determining a number of interpolation elements based on a slice thickness of the plurality of images, and filtering the image data using the determined interpolation elements.

公开(公告)号：US20050078791A1

公开(公告)日：2005-04-14

申请号：US10683037

申请日：2003-10-10

Applicant: Jianying Li

Inventor： Jianying Li

IPC: A61B6/00 ,  A61B6/03 ,  G01N23/083 ,  G06T11/00 ,  H05G1/00 ,  H05G1/10

CPC classification number: G06T11/005 ,  A61B6/032 ,  A61B6/4085 ,  A61B6/503 ,  A61B6/541 ,  G06T2211/412 ,  Y10S378/901

Abstract: A method for smoothing is described. The method includes generating original projection data, and smoothing the original projection data based on variations in a current that is synchronous with phases of motion of an object.

公开(公告)号：US06393091B1

公开(公告)日：2002-05-21

申请号：US09460261

申请日：1999-12-13

Applicant: Christopher C. Slack ,  Jianying Li

Inventor： Christopher C. Slack ,  Jianying Li

IPC: A61B600

CPC classification number: A61B6/541

Abstract: A method for imaging a heart of a patient utilizing a CT imaging system includes steps of assigning a scanning priority to phases of a representative cardiac cycle of the patient's heart, selecting phases of the cardiac cycle for scanning in accordance with the assigned scanning priority, and obtaining image slices of the patient's heart corresponding the selected phases of the cardiac cycle. The method can be performed by a CT imaging system including an EKG machine to record EKG data.

Abstract translation: 使用CT成像系统对患者的心脏成像的方法包括以下步骤：将扫描优先级分配给患者心脏的代表性心动周期的相位，根据分配的扫描优先级选择用于扫描的心动周期的相位;以及 获得对应于心脏周期的选定阶段的患者心脏的图像切片。 该方法可以由包括EKG机的CT成像系统进行记录EKG数据。

公开(公告)号：US06343110B1

公开(公告)日：2002-01-29

申请号：US09625295

申请日：2000-07-25

Applicant: Jianying Li

Inventor： Jianying Li

IPC: G01N2300

CPC classification number: A61B6/032 ,  A61B6/027 ,  A61B6/06 ,  A61B6/4085 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/612

Abstract: One embodiment of the present invention is a method for imaging an object using a multi-slice computed tomography (CT) imaging system having a radiation source and a detector, the detector having a plurality of detector rows configured to acquire projection data from a scanned object between the radiation source and the detector, wherein each of the detector rows is perpendicular to and has a thickness in a z-direction. The method includes steps of collimating a radiation beam from the radiation source into a plurality of separate beam portions transverse to the z-direction so that the separate beam portions pass through the object and impinge on the detector rows; scanning the object using the plurality of separate beam portions to acquire projection data; and reconstructing an image of the object utilizing the acquired projection data.

Abstract translation: 本发明的一个实施例是一种使用具有辐射源和检测器的多层计算机断层摄影（CT）成像系统对物体进行成像的方法，所述检测器具有多个检测器行，其被配置为从扫描对象获取投影数据 在辐射源和检测器之间，其中检测器行中的每一个垂直于并具有z方向的厚度。 该方法包括以下步骤：将来自辐射源的辐射束准直成横向于z方向的多个独立的光束部分，使得分离的光束部分穿过物体并撞击检测器行; 使用多个单独的光束部分扫描对象以获取投影数据; 以及利用所获取的投影数据重建对象的图像。

公开(公告)号：US20090274266A1

公开(公告)日：2009-11-05

申请号：US12433494

申请日：2009-04-30

Applicant: Yunfeng Sun ,  Jiaqin Dong ,  Jianying Li

Inventor： Yunfeng Sun ,  Jiaqin Dong ,  Jianying Li

IPC: H05G1/60 ,  G01T1/24

CPC classification number: A61B6/032 ,  G01T1/241 ,  G01T1/249

Abstract: An X-ray detector includes a single-layered semiconductor substrate having an array of detection cells which directly convert photons of X-rays into electrical signals; a first data collecting device which collects data with respect to the array of detection cells in a photon counting mode; and a second data collecting device which collects data with respect to the array of detection cells in a current measuring mode.

Abstract translation: X射线检测器包括具有将X射线的光子直接转换为电信号的检测单元阵列的单层半导体基板; 第一数据采集装置，以光子计数模式收集相对于所述检测单元阵列的数据; 以及第二数据采集装置，其以当前测量模式收集关于检测单元阵列的数据。

公开(公告)号：US06922462B2

公开(公告)日：2005-07-26

申请号：US10064621

申请日：2002-07-31

Applicant: Kishore Acharya ,  Priya Gopinath ,  Jianying Li ,  Darin Okerlund ,  Matthew Joseph Walker

Inventor： Kishore Acharya ,  Priya Gopinath ,  Jianying Li ,  Darin Okerlund ,  Matthew Joseph Walker

IPC: A61B6/03 ,  A61B6/00 ,  G06T7/00 ,  G06T11/00 ,  H05G1/64

CPC classification number: A61B6/405 ,  A61B6/481 ,  A61B6/482 ,  A61B6/504 ,  G06T7/0012 ,  G06T2207/30048

Abstract: A method for plaque characterization. The method comprises obtaining a first set of image data created in response to a first x-ray energy level and including a plurality of pixel elements. Each of the first pixel elements corresponds to a unique location in an object being scanned. The method further comprises obtaining a second set of image data created in response to a second x-ray energy level and including a plurality of second pixel elements. Each of the second pixel elements corresponds to one of the first pixel elements and the second x-ray energy level is higher than the first x-ray energy level. The method also comprises calculating a third set of image data in response to the first set of image data and the second set of image data. The calculating includes subtracting each second pixel element from the corresponding first pixel element.

Abstract translation: 斑块表征的方法。 该方法包括获得响应于第一x射线能量级而创建并包括多个像素元素的第一组图像数据。 每个第一像素元素对应于被扫描物体中的唯一位置。 该方法还包括获得响应于第二x射线能量级而创建并包括多个第二像素元素的第二组图像数据。 第二像素元素中的每一个对应于第一像素元素之一，第二x射线能级高于第一x射线能级。 该方法还包括响应于第一组图像数据和第二组图像数据来计算第三组图像数据。 计算包括从相应的第一像素元素中减去每个第二像素元素。

公开(公告)号：US20050018889A1

公开(公告)日：2005-01-27

申请号：US10616162

申请日：2003-07-09

Applicant: Jianying Li

Inventor： Jianying Li

IPC: G06K9/00 ,  G06T5/00 ,  G06T5/40

CPC classification number: G06T5/002 ,  G06T5/008 ,  G06T5/20 ,  G06T2207/10081 ,  G06T2207/20012 ,  G06T2207/30008

Abstract: A method for filtering images is described. The method includes obtaining an image, and obtaining a final pixel value by performing a filtering operation on an initial pixel value of at least one pixel of the image and by modulating the filtering operation with a gain factor that is a function of the initial pixel value.

Abstract translation: 描述用于过滤图像的方法。 该方法包括获得图像，并且通过对图像的至少一个像素的初始像素值执行滤波操作并且通过利用作为初始像素值的函数的增益因子调制滤波操作来获得最终像素值 。

公开(公告)号：US07609870B2

公开(公告)日：2009-10-27

申请号：US10925317

申请日：2004-08-24

Applicant: Jianying Li

Inventor： Jianying Li

IPC: G06K9/00 ,  G06K9/40

CPC classification number: G06T5/002 ,  G06T5/003 ,  G06T5/20 ,  G06T7/136 ,  G06T2207/10081 ,  G06T2207/20012 ,  G06T2207/30064

Abstract: Methods and systems for enhancing an image including a plurality of image pixels are provided. The method includes segmenting the image by comparing an image pixel CT number to a plurality of predetermined thresholds. The methods further include filtering the plurality of image pixels based on the comparison and generating an output image based on the filtered image pixels.

Abstract translation: 提供了用于增强包括多个图像像素的图像的方法和系统。 该方法包括通过将图像像素CT数与多个预定阈值进行比较来分割图像。 所述方法还包括基于比较对多个图像像素进行滤波，并且基于滤波图像像素生成输出图像。

公开(公告)号：US06449330B1

公开(公告)日：2002-09-10

申请号：US09681939

申请日：2001-06-28

Applicant: Jianying Li ,  Charles Shaughnessy

Inventor： Jianying Li ,  Charles Shaughnessy

IPC: A61B603

CPC classification number: G06T11/005 ,  A61B6/032 ,  Y10S378/901

Abstract: A method for reducing artifacts in computed tomographic (CT) images is provided that is particularly useful for CT applications requiring higher gantry rotation rates. The method includes selecting a set of thresholds for projection view data; utilizing a smoothing kernel in accordance with the selected set of thresholds to produce a set of smoothed projections from a set of original projections obtained from a scan of an object, wherein an amount of smoothing applied varies depending upon a relationship of the original projections to the thresholds; producing a set of final projections utilizing the set of original projections and the set of smoothed projections; and reconstructing images of the object utilizing the final projections.

Abstract translation: 提供了一种减少计算机断层摄影（CT）图像中伪像的方法，对于需要更高龙门架旋转速率的CT应用，该方法特别有用。 该方法包括选择投影视图数据的一组阈值; 根据所选择的阈值集合利用平滑核，以从从对象的扫描获得的一组原始投影产生一组平滑的投影，其中应用的平滑量根据原始投影与 阈值 利用一套原始投影和一套平滑的投影产生一套最终的投影; 并利用最终投影来重构对象的图像。