公开(公告)号：US5903008A

公开(公告)日：1999-05-11

申请号：US888341

申请日：1997-07-02

Applicant: Jianying Li

Inventor： Jianying Li

IPC: G01T1/164 ,  G01T1/161

CPC classification number: G01T1/1647

Abstract: An emission tomographic system for imaging an object of interest is described. The system, in one form, includes a gantry and a patient table. A detector including a collimator is secured to the gantry, and a computer is coupled to the gantry and to the detector to detect and control the position of the detector relative to the table. The system is configured to determine a transmission measurement and generate a scatter fraction utilizing the transmission measurement. A dual energy window data acquisition algorithm then determines non-scatter photons in a primary energy window utilizing the scatter fraction.

Abstract translation: 描述了用于对感兴趣对象进行成像的发射断层摄影系统。 该系统以一种形式包括台架和患者台。 包括准直器的检测器固定在台架上，并且计算机耦合到台架和检测器以检测和控制检测器相对于工作台的位置。 该系统被配置为确定传输测量并且使用传输测量来生成散射分数。 双能量窗数据获取算法然后利用散射分数来确定一次能量窗中的非散射光子。

公开(公告)号：US20060045371A1

公开(公告)日：2006-03-02

申请号：US10925317

申请日：2004-08-24

Applicant: Jianying Li

Inventor： Jianying Li

IPC: G06K9/40 ,  G06K9/00

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.

公开(公告)号：US06996262B2

公开(公告)日：2006-02-07

申请号：US10151510

申请日：2002-05-20

Applicant: Jianying Li

Inventor： Jianying Li

IPC: G06K9/00 ,  A62B5/02

CPC classification number: G06T7/0012 ,  G06T7/60 ,  G06T2207/30101

Abstract: The present invention is directed to a method and apparatus of scoring an arterial obstruction. The present invention includes identifying a particular group of pixels corresponding to a calcified region of coronary artery of a patient and based on the satisfaction of a number of thresholds connectivity criteria, determining a calcification score of that calcified region as indicative of the patient's risk of cardiovascular disease including atherosclerosis, heart attack, heart failure, and stroke. The present invention further includes determining the scaling factor unique to a particular imaging slice of data to provide a value of calcium weight and volume that is indicative of the true obstruction and true volume of the calcified region.

公开(公告)号：US06775352B2

公开(公告)日：2004-08-10

申请号：US10064784

申请日：2002-08-16

Applicant: Thomas Louis Toth ,  Bruce Matthew Dunham ,  Kelly Lynn Karau ,  Jianying Li

Inventor： Thomas Louis Toth ,  Bruce Matthew Dunham ,  Kelly Lynn Karau ,  Jianying Li

IPC: H05G144

CPC classification number: A61B6/544 ,  A61B6/027 ,  A61B6/032 ,  A61B6/542 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/612

Abstract: A method, system and medium for modulating the x-ray power of an imaging system so as to maintain a desired image noise in the imaging system is disclosed. In an exemplary embodiment, the method includes obtaining projection data, correcting the projection data responsive to beam hardening errors so as to create corrected projection data, processing the corrected projection data so as to create a plurality of emitter current values responsive to an imaging method and applying the emitter current values to the imaging system responsive to an object to be imaged. In another aspect, a method for determining an optimum emitter tube voltage for an imaging system includes characterizing the imaging system so as to determine a system water-equivalent path length responsive to a relative noise increase. An object water-equivalent path length is then determined and compared with the system water-equivalent path length so as to create a comparison result, allowing for the recommendation of the optimum emitter tube voltage responsive to the comparison result.

Abstract translation: 公开了一种用于调制成像系统的x射线功率以便在成像系统中保持期望的图像噪声的方法，系统和介质。 在示例性实施例中，该方法包括获得投影数据，响应于光束硬化误差校正投影数据，以便产生校正的投影数据，处理校正的投影数据，以响应于成像方法产生多个发射极电流值，以及 响应于要成像的对象将发射器电流值施加到成像系统。 在另一方面，一种用于确定成像系统的最佳发射管电压的方法包括表征成像系统，以便响应于相对噪声增加来确定系统水当量路径长度。 然后确定对象水当量路径长度并将其与系统水当量路径长度进行比较，以便产生比较结果，从而允许根据比较结果推荐最佳发射管电压。

公开(公告)号：US06459755B1

公开(公告)日：2002-10-01

申请号：US09683873

申请日：2002-02-26

Applicant: Jianying Li

Inventor： Jianying Li

IPC: A61B603

CPC classification number: A61B6/542 ,  A61B6/032 ,  A61B6/4233 ,  Y10S378/901

Abstract: The present invention is directed to a method and apparatus for administering computed tomography (CT) imaging scans with reduced radiation dosage. The present invention includes an algorithm that allows for reduction of the sampling rate and tube current to acquire a first set of angular views. A second set of angular views is then created using interpolation from the first set of angular views. The sets of angular views are then combined to form a final set of angular views that are used to create an aliasing-free image of the scan subject. The present invention is particularly applicable for scanning centralized small objects such as the heart or the head and also is particularly useful in acquiring imaging data of pediatric patients.

Abstract translation: 本发明涉及用于以减少的辐射剂量管理计算机断层摄影（CT）成像扫描的方法和装置。 本发明包括允许降低采样率和管电流以获取第一组角度视图的算法。 然后使用第一组角度视图的内插创建第二组角度视图。 然后将这组角度视图组合以形成用于创建扫描对象的无混叠图像的最终的一组角度视图。 本发明特别适用于扫描诸如心脏或头部的集中小物体，并且特别适用于获取儿科患者的成像数据。

公开(公告)号：US07916831B2

公开(公告)日：2011-03-29

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: A61B6/00

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：US06931094B2

公开(公告)日：2005-08-16

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.

Abstract translation: 描述平滑的方法。 该方法包括产生原始投影数据，以及基于与对象的运动相位同步的电流的变化来平滑原始投影数据。

公开(公告)号：US06687327B2

公开(公告)日：2004-02-03

申请号：US09683073

申请日：2001-11-15

Applicant: Jianying Li

Inventor： Jianying Li

IPC: H05G160

CPC classification number: A61B6/488 ,  A61B6/032 ,  A61B6/544 ,  G06T11/005 ,  G06T2211/432

Abstract: A system and method of medical imaging is designed to reduce a patient's X-ray exposure during scanning based upon patient size and task dependency. The system includes receiving a task and patient size dependency input and determining threshold levels based on the received inputs to separate imaging data into a number of projection sets for further image processing and reconstruction of an image. Each projection set can then be independently processed based on the type of task and/or the patient size to allow reduced and modified X-ray doses dependent on the task and/or specific patient to be scanned.

Abstract translation: 医学成像的系统和方法被设计为基于患者大小和任务依赖性来减少患者在扫描期间的X射线暴露。 该系统包括接收任务和患者大小依赖性输入，并且基于所接收的输入来确定阈值水平，以将成像数据分离成多个投影集合用于图像的进一步图像处理和重建。 然后可以基于任务类型和/或患者大小来独立地处理每个投影集，以允许取决于要扫描的任务和/或特定患者的减少和修改的X射线剂量。

公开(公告)号：US06522714B1

公开(公告)日：2003-02-18

申请号：US10037032

申请日：2001-11-09

Applicant: Sharon Wang ,  Stephen Metz ,  Thomas Toth ,  Piero U. Simoni ,  Jianying Li

Inventor： Sharon Wang ,  Stephen Metz ,  Thomas Toth ,  Piero U. Simoni ,  Jianying Li

IPC: A61B603

CPC classification number: G06T11/005 ,  A61B6/027 ,  A61B6/032 ,  G01T1/2985 ,  Y10S378/901

Abstract: A method and apparatus for performing image reconstruction using data obtained by an N beam helical scan, the method including generating projection data arrays for each of the N row in a CT detector, weighting the data arrays using a unique weighting function that is applicable to detectors having many different numbers of rows N to generate helical weighted arrays for each row, weighting the helical weighted arrays by applying a conjugate weighting function to generate conjugate arrays for each detector row and then combining the conjugate weighted arrays, filtering and back-projecting to generate a slice image.

Abstract translation: 一种用于使用通过N波束螺旋扫描获得的数据进行图像重建的方法和装置，所述方法包括为CT检测器中的N行中的每一个生成投影数据阵列，使用适用于检测器的唯一加权函数对数据阵列进行加权 具有许多不同数量的行N以产生每行的螺旋加权阵列，通过应用共轭加权函数对每个检测器行产生共轭阵列，然后组合共轭加权阵列，进行滤波和反投影来加权螺旋加权阵列，以产生 切片图像。

公开(公告)号：US06385277B1

公开(公告)日：2002-05-07

申请号：US09475590

申请日：1999-12-30

Applicant: Jianying Li ,  Robert F. Senzig

Inventor： Jianying Li ,  Robert F. Senzig

IPC: A61B600

CPC classification number: A61B6/032 ,  A61B6/4021 ,  A61B6/583 ,  G06T11/005 ,  G06T2211/412 ,  H05G1/34

Abstract: In one embodiment of the present invention, a method for collecting views for imaging an object utilizing a CT imaging system is provided. The method includes steps of: performing a first rotational scan of an object to acquire a first set of views of the object; performing a second rotational scan of the object to acquire a second set of views of the object; offsetting starting angular views of the second rotational scan relative to the first rotational scan so that the first set of views and the second set of views form a set of interlaced views; and reconstructing an image of the object utilizing the first set of views and the second set of views.

Abstract translation: 在本发明的一个实施例中，提供了一种用于收集利用CT成像系统对物体成像的视图的方法。 该方法包括以下步骤：执行对象的第一旋转扫描以获取对象的第一组视图; 执行对象的第二旋转扫描以获取对象的第二组视图; 相对于第一旋转扫描偏移第二旋转扫描的起始角度视图，使得第一组视图和第二组视图形成一组交错视图; 以及利用第一组视图和第二组视图来重构对象的图像。