公开(公告)号：WO2008075267A3

公开(公告)日：2008-08-14

申请号：PCT/IB2007055083

申请日：2007-12-13

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY ,  SHECHTER GILAD ,  GLASBERG SHMUEL ,  VAN STEVENDAAL UDO ,  FORTHMANN PETER ,  KOEHLER THOMAS ,  BONTUS CLAAS

Inventor： SHECHTER GILAD ,  GLASBERG SHMUEL ,  VAN STEVENDAAL UDO ,  FORTHMANN PETER ,  KOEHLER THOMAS ,  BONTUS CLAAS

IPC: A61B6/06

CPC classification number: A61B6/06

Abstract: An imaging device (100,200) for imaging a volume of interest (5,45) of a subject (4,44) comprises a radiation source (1) for emitting radiation (6), which is arranged for rotational movement around an axis (8) of the subject (4,44), a collimator (3) for collimating the radiation (6) at least in the axial direction of the subject (4,44) before traversing through the subject (4,44), a detector (2) for receiving the collimated radiation (11,12,13,14,15,16) that has traversed through the subject (4,44), and a control unit (7) for controlling the collimator (3) based on at least one geometry parameter that defines a geometrical relationship between the volume of interest (5,45) and the imaging device (100,200). The imaging device (100,200) provides for a reduced dose of radiation applied to the subject (4,44).

Abstract translation: 用于对受试者（4,44）感兴趣的体积（5,45）进行成像的成像装置（100,200）包括用于发射辐射（6）的辐射源（1），其布置成围绕轴线（8 ），用于在穿过被摄体（4,44）之前至少在被检体（4,44）的轴向上校准辐射（6）的准直器（3），检测器（4,44） 2），用于接收已经穿过被摄体的准直辐射（11,12,13,14,15,16），以及用于至少基于控制单元（7）控制准直仪（3）的控制单元（7） 一个几何参数，其定义感兴趣的体积（5,45）和成像装置（100,200）之间的几何关系。 成像装置（100,200）提供施加到对象的减少剂量的辐射（4,44）。

公开(公告)号：WO2007140094A3

公开(公告)日：2008-01-17

申请号：PCT/US2007068539

申请日：2007-05-09

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS CORP ,  SHECHTER GILAD ,  GRINGAUS ASHER ,  BAR YOAV ,  LAVI GUY

Inventor： SHECHTER GILAD ,  GRINGAUS ASHER ,  BAR YOAV ,  LAVI GUY

IPC: G06T11/00

CPC classification number: G06T11/005 ,  A61B6/027 ,  G06T2211/404 ,  G06T2211/412

Abstract: Projection data (302) acquired during a tomographic examination of a periodically moving object is used to reconstruct a plurality of image layers (308). The image layers (308) are combined to generate image data at a desired phase of motion. To generate a weighting function used to combine the image layers, a reference weighting function (512) is generated at the desired phase. The image layers (308) are weighted to approximate the first weighting function (312). The number of image layers and the size of a sub-region of interest are advantageously selected so that the various image layers can be stored in a relatively high speed memory portion of a computer.

Abstract translation: 在周期性移动物体的断层摄影检查期间获取的投影数据（302）用于重建多个图像层（308）。 图像层（308）被组合以在期望的运动阶段产生图像数据。 为了产生用于组合图像层的加权函数，在期望的阶段产生参考加权函数（512）。 图像层（308）被加权以近似第一加权函数（312）。 有利地选择图像层的数量和感兴趣的子区域的大小，使得各种图像层可以存储在计算机的相对高速的存储器部分中。

公开(公告)号：WO2004075119A3

公开(公告)日：2005-02-03

申请号：PCT/IL0300699

申请日：2003-08-25

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  SHECHTER GILAD ,  GRASS MICHAEL

Inventor： SHECHTER GILAD ,  GRASS MICHAEL

IPC: A61B6/00 ,  A61B6/03 ,  G06T11/00 ,  G06T7/20

CPC classification number: A61B6/541 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4085 ,  A61B6/503 ,  G06T11/005 ,  G06T2211/412

Abstract: There is therefore provided in accordance with an embodiment of the present invention, a CT scanner for providing an image of a region a patient's heart comprising: at least one X-ray cone beam for illuminating the region with X-rays; a plurality of rows of X-ray detectors that generate signals responsive to attenuation of X-rays from the at least one X-ray source that pass through the region; a controller that controls the at least one X-ray cone beam to illuminate the patient with X-rays so as to acquire attenuation data for the region during a plurality of heart cycles; and a processor that receives the signals and: determines a duration, 2DtM, of at least one imaging window centered at the heart phase of each of the heart cycles for each voxel of the region independent of determining the duration of the at least one imaging window for the other voxels; determines an attenuation value for each voxel using substantially only attenuation data acquired during the at least one window; and generates the image of the region using the determined attenuation values.

Abstract translation: 因此，根据本发明的实施例提供了一种用于提供患者心脏区域的图像的CT扫描器，包括：用于用X射线照射该区域的至少一个X射线锥形束; 多行X射线检测器，其产生响应来自穿过该区域的至少一个X射线源的X射线衰减的信号; 控制器，其控制所述至少一个X射线锥束以X射线照射所述患者，以便在多个心脏周期期间获取所述区域的衰减数据; 以及处理器，其接收所述信号，并且：确定至少一个成像窗口的持续时间2DtM，所述至少一个成像窗口以所述区域中的每个体素的每个心脏周期的心脏相位为中心，与确定所述至少一个成像窗口的持续时间无关 为其他体素; 使用基本上仅在所述至少一个窗口期间获取的衰减数据来确定每个体素的衰减值; 并使用所确定的衰减值产生该区域的图像。

公开(公告)号：WO2012147004A1

公开(公告)日：2012-11-01

申请号：PCT/IB2012/051828

申请日：2012-04-13

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  SHECHTER, Gilad

Inventor： SHECHTER, Gilad

IPC: G06T11/00

CPC classification number: G06T7/0012 ,  G06T11/005

Abstract: A method includes generating landmarks, for different compositions of materials in scanned structure, wherein a landmark represents a location of a composition of materials, distorted by beam hardening, in a multi-energy Hounsfield Unit space and using the landmarks to perform an image domain material separation and quantification free of beam hardening artifacts.

Abstract translation: 一种方法包括为扫描结构中的材料的不同组成生成界标，其中，在多能Hounsfield单位空间中，地标表示通过光束硬化而变形的材料成分的位置，并使用该标记来执行图像域材料 分离和定量无束强化伪影。

公开(公告)号：WO2010128413A1

公开(公告)日：2010-11-11

申请号：PCT/IB2010/051540

申请日：2010-04-09

Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V. ,  U.S. PHILIPS CORPORATION ,  SHECHTER, Gilad

Inventor： SHECHTER, Gilad

IPC: G06T11/00

CPC classification number: G06T11/005 ,  G06T2211/421

Abstract: A system for generating a reconstruction filter for an imaging scanner comprises a model bank (124) that includes a model for generating the reconstruction filter, a filter criteria bank (122) that includes filter criteria for generating the reconstruction filter, and a filter generator (120) that generates the reconstruction filter based on the filter model and the filter criteria. In one non-limiting instance, the model is based on minimizing a cost function that includes predetermined filter criteria such as image contrast. In another non- limiting instance, the cost function includes terms relating to spatial resolution, noise and a signal visual perception in the presence of noise.

Abstract translation: 一种用于生成用于成像扫描器的重建滤波器的系统，包括模型库（124），其包括用于生成重建滤波器的模型，包括用于生成重建滤波器的滤波器标准的滤波器标准库（122）和滤波器发生器 120），其基于过滤器模型和过滤器标准生成重建过滤器。 在一个非限制性实例中，该模型基于最小化包括预定过滤标准（例如图像对比度）的成本函数。 在另一非限制性实例中，成本函数包括与存在噪声时的空间分辨率，噪声和信号视觉感知有关的术语。

公开(公告)号：WO2005072612A1

公开(公告)日：2005-08-11

申请号：PCT/IB2005/050139

申请日：2005-01-12

Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V. ,  HEUSCHER, Dominic, J. ,  UTRUP, Steven, J. ,  SHECHTER, Gilad ,  KOEHLER, Thomas

Inventor： HEUSCHER, Dominic, J. ,  UTRUP, Steven, J. ,  SHECHTER, Gilad ,  KOEHLER, Thomas

IPC: A61B6/03

CPC classification number: A61B6/032 ,  A61B6/027 ,  A61B6/4021 ,  A61B6/4085 ,  G06T11/005

Abstract: A computed tomography imaging apparatus includes a radiation detector array (16) having detector elements (50) that are staggered in an axial direction (Z) by a selected non-zero staggering fraction (ds) of a detector spacing (dz) along the axial direction (Z). A radiation source (12) provides focal spot modulation at least between two spots (FS1, FS2) to increase a sampling rate transverse to the axial direction (Z).

Abstract translation: 计算机断层摄影成像设备包括具有检测器元件（50）的辐射检测器阵列（16），所述检测器元件（50）沿轴向方向（Z）以沿轴向方向的检测器间隔（dz）的选定的非零交错分数（ds）交错排列 方向（Z）。 辐射源（12）至少在两个点（FS1，FS2）之间提供焦点调制，以增加横向于轴向方向（Z）的采样率。

公开(公告)号：WO2004075119A2

公开(公告)日：2004-09-02

申请号：PCT/IL2003/000699

申请日：2003-08-25

Applicant: PHILIPS MEDICAL SYSTEMS TECHNOLOGIES LTD. ,  SHECHTER, Gilad ,  GRASS, Michael

Inventor： SHECHTER, Gilad ,  GRASS, Michael

IPC: G06T11/00

CPC classification number: A61B6/541 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4085 ,  A61B6/503 ,  G06T11/005 ,  G06T2211/412

Abstract: There is therefore provided in accordance with an embodiment of the present invention, a CT scanner for providing an image of a region a patient's heart comprising: at least one X-ray cone beam for illuminating the region with X-rays; a plurality of rows of X-ray detectors that generate signals responsive to attenuation of X-rays from the at least one X-ray source that pass through the region; a controller that controls the at least one X-ray cone beam to illuminate the patient with X-rays so as to acquire attenuation data for the region during a plurality of heart cycles; and a processor that receives the signals and: determines a duration, 2DtM, of at least one imaging window centered at the heart phase of each of the heart cycles for each voxel of the region independent of determining the duration of the at least one imaging window for the other voxels; determines an attenuation value for each voxel using substantially only attenuation data acquired during the at least one window; and generates the image of the region using the determined attenuation values.

Abstract translation: 因此，根据本发明的实施例，提供了一种用于提供患者心脏区域的图像的CT扫描器，包括：用于用X射线照射该区域的至少一个X射线锥形束; 多行X射线检测器，其产生响应来自穿过该区域的至少一个X射线源的X射线的衰减的信号; 控制器，其控制所述至少一个X射线锥束以X射线照射所述患者，以便在多个心脏周期期间获取所述区域的衰减数据; 以及处理器，其接收所述信号，并且：为了确定所述至少一个成像窗口的持续时间，确定以所述区域中的每个体素为中心的每个心脏周期的心脏相位的至少一个成像窗口的持续时间2DtM 为其他体素; 使用基本上仅在所述至少一个窗口期间获取的衰减数据来确定每个体素的衰减值; 并使用所确定的衰减值来产生该区域的图像。

公开(公告)号：WO2011161557A1

公开(公告)日：2011-12-29

申请号：PCT/IB2011/051846

申请日：2011-04-27

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  SHECHTER, Gilad

Inventor： SHECHTER, Gilad

IPC: G06T5/00 ,  G06T11/00

CPC classification number: G06T5/002 ,  G06T11/005 ,  G06T11/008 ,  G06T2207/10081 ,  G06T2207/30004

Abstract: A method includes de-noising projection data from a lower dose scan in the projection domain, reconstructing the de-noised projection data to generate volumetric image data, and de- noising the volumetric image data in the image domain. A system includes a projection domain processor (116) that de-noises projection data from a lower dose scan, a reconstructor (118) that reconstructs the de-noised projection data and generates image data, and an image domain processor (120) that de-noises the image data such that a noise level of the de-noise image data is substantially the same as an estimated image data noise level of image data for a higher dose scan.

Abstract translation: 一种方法包括从投影域中的较低剂量扫描中去除噪声投影数据，重构去噪投影数据以产生体积图像数据，以及去除图像域中的体积图像数据。 一种系统包括一个能够降低来自较低剂量扫描的投影数据的投影域处理器（116），一个重建该去噪投影数据并生成图像数据的重建器（118），以及一个图像域处理器 - 噪声图像数据，使得去噪图像数据的噪声电平与用于较高剂量扫描的图像数据的估计图像数据噪声电平基本相同。

公开(公告)号：WO2006136973A3

公开(公告)日：2007-07-26

申请号：PCT/IB2006051889

申请日：2006-06-13

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS CORP ,  SHECHTER GILAD

Inventor： SHECHTER GILAD

IPC: A61B6/03

CPC classification number: A61B6/032 ,  A61B6/027 ,  A61B6/4085

Abstract: A subject is imaged at a preselected phase point (34) which occurs in one or more successive cardiac cycles as the subject moves in an examination region (16). An illumination window (94) illuminates each reconstructed voxel (A, B, C) of the subject in phase point windows (92) adjacent surroundingly the preselected phase point (34). A temporal window (90) is determined which includes an integer number N of successive cardiac cycles, in which the phase point windows (92) are entirely included in the illumination window (94). The illumination window (94) is truncated in accordance with the determined temporal window (90). First and second regions (72, 74) are determined along an axial direction (Z), the first and second regions (72, 74) alternating with one another. A temporal weighting profile processor (64) generates a projection dependent temporal weighting profile (66). A temporal window processor (102) applies the normalized backprojection weights for each voxel which lies in an associated first region. A varying weight processor (110) continuously smoothly weights readings for each voxel lying in an associated second region (74). A backprojection processor (120) three- dimensionally backprojects the weighted readings into a volumetric image representation.

Abstract translation: 当受试者在检查区域（16）中移动时，在一个或多个连续心脏周期中发生的预选相位点（34）成像对象。 照明窗口（94）照亮邻近预选相位点（34）的相位点窗口（92）中的被摄体的每个重建体素（A，B，C）。 确定包括连续心动周期的整数N的时间窗口（90），其中相位点窗口（92）完全包括在照明窗口（94）中。 照明窗（94）根据所确定的时间窗（90）被截断。 第一和第二区域（72,74）沿着轴向（Z）确定，第一和第二区域（72,74）彼此交替。 时间加权分布处理器（64）产生依赖于投影的时间加权分布（66）。 时间窗口处理器（102）对位于相关联的第一区域中的每个体素应用归一化反投影权重。 不同重量的处理器（110）连续地平滑地重量位于相关联的第二区域（74）中的每个体素的读数。 背投影处理器（120）将加权读数三维地反投影为体积图像表示。

公开(公告)号：WO2007082106A1

公开(公告)日：2007-07-19

申请号：PCT/US2007/060005

申请日：2007-01-02

Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V. ,  U.S. PHILIPS CORPORATION ,  SHECHTER, Gilad

Inventor： SHECHTER, Gilad

IPC: G01N23/04 ,  A61B6/03 ,  G06T11/00

CPC classification number: A61B6/585 ,  A61B6/032 ,  A61B6/583 ,  G06T11/005

Abstract: A computed tomography scanner (10) includes a plurality of detector elements (100). The signals generated by the detector elements (100) may include an error component which can lead to artifacts in a reconstructed image. An apparatus includes a signal level detector (208) and a signal change detector (210) which evaluate the characteristics of a signal generated by a first detector element during the scan. The apparatus also includes a signal comparator (214) which evaluates a calibrated version of the signal generated by the first detector in relation to a signal generated by a second radiation sensitive detector element. Based on the results of the evaluations, a signal corrector (218) corrects temporal portions of the calibrated first detector signal which are suspected to lead to an artifact.

Abstract translation: 计算机断层摄影扫描器（10）包括多个检测器元件（100）。 由检测器元件（100）产生的信号可以包括可能导致重建图像中的假象的误差分量。 一种装置包括信号电平检测器（208）和信号改变检测器（210），其在扫描期间评估由第一检测器元件产生的信号的特性。 该装置还包括信号比较器（214），该信号比较器（214）相对于由第二辐射敏感检测器元件产生的信号来评估由第一检测器产生的信号的校准版本。 基于评估结果，信号校正器（218）校正被怀疑导致伪影的校准的第一检测器信号的时间部分。