公开(公告)号：WO2006056914A2

公开(公告)日：2006-06-01

申请号：PCT/IB2005053796

申请日：2005-11-17

Applicant: PHILIPS INTELLECTUAL PROPERTY ,  KONINKL PHILIPS ELECTRONICS NV ,  KOEHLER THOMAS

Inventor： KOEHLER THOMAS

IPC: A61B6/00

CPC classification number: A61B6/583

Abstract: The invention describes a computer tomography method, in which a provided marker is reconstructed in order to determine the image resolution during the image reconstruction. The invention furthermore discloses a computer tomograph comprising a patient table for supporting a patient in order to expose said patient to X-ray radiation, wherein at least one marker for determining the image resolution during the image reconstruction is arranged on the patient table.

Abstract translation: 本发明描述了一种计算机断层摄影方法，其中重建提供的标记以便在图像重建期间确定图像分辨率。 本发明还公开了一种计算机断层摄影机，其包括用于支撑患者以便将所述患者暴露于X射线辐射的患者台，其中用于在图像重建期间确定图像分辨率的至少一个标记被布置在患者台上。

公开(公告)号：WO2004111945A3

公开(公告)日：2005-05-12

申请号：PCT/IB2004050845

申请日：2004-06-07

Applicant: PHILIPS INTELLECTUAL PROPERTY ,  KONINKL PHILIPS ELECTRONICS NV ,  KOEHLER THOMAS ,  PROKSA ROLAND

Inventor： KOEHLER THOMAS ,  PROKSA ROLAND

IPC: G06T11/00

CPC classification number: G06T11/006 ,  A61B6/027 ,  G06T2211/416

Abstract: The invention relates to a computer tomography method in which a radiation source moves relative to an examination region along, in particular, a helical or circular trajectory. Measured values are acquired by a detector unit and a CT image of the examination region is reconstructed from these measured values. In the reconstruction, a complementary measured value, whose ray is oriented parallel to the ray of the respective measured value that has been acquired but in the opposite direction thereto, is determined for each of at least some measured values that lie within a reconstruction window. Redundant measured values are used to calculate the complementary measured values, with the help in particular of John's equation. The measured values for which complementary measured values have been determined are each replaced by a sum comprised a measured value that has been weighted and a complementary measured value that has been weighted, and a CT image is reconstructed, in particular by an exact method of reconstruction, from the replacement measured values, and where appropriate from acquired measured values, that lie within the reconstruction window.

Abstract translation: 本发明涉及一种计算机断层摄影方法，其中辐射源相对于沿着特别是螺旋或圆形轨迹的检查区域移动。 通过检测器单元获取测量值，并从这些测量值重建检查区域的CT图像。 在重建中，对于位于重建窗口内的至少一些测量值中的每一个确定其光线平行于已经获取但与其相反方向的相应测量值的射线的互补测量值。 冗余测量值用于计算补充测量值，特别是约翰方程式的帮助。 已经确定了互补测量值的测量值各自被包括被加权的测量值和已经加权的测量值和重建CT图像的和，特别是通过重建的精确方法 ，从替换测量值，并在适当时从获得的测量值，位于重建窗口内。

公开(公告)号：WO2004075106A3

公开(公告)日：2005-03-10

申请号：PCT/IB2004000346

申请日：2004-02-11

Applicant: PHILIPS INTELLECTUAL PROPERTY ,  KONINKL PHILIPS ELECTRONICS NV ,  BONTUS CLAAS ,  KOEHLER THOMAS

Inventor： BONTUS CLAAS ,  KOEHLER THOMAS

IPC: G06T20060101 ,  G06T1/00 ,  G06T11/00

CPC classification number: G06T11/006 ,  A61B6/027 ,  G06T2211/416 ,  G06T2211/421

Abstract: The invention relates to a computerized tomography method, in which an examination area is scanned radiographically along a helical trajectory by a conical beam. The radiation transmitted through the examination area is measured by means of a detector unit, wherein the absorption distribution in the examination area is reconstructed exactly or at least quasi-exactly from these measured values. Reconstruction uses redundant measured values and comprises derivation of the measured values from parallel rays of different projections, integration of these values along kappa -lines, weighting of these values and back-projection.

Abstract translation: 本发明涉及一种计算机断层摄影方法，其中通过锥形光束沿着螺旋轨迹对X射线照相检查区域进行扫描。 透过检查区域的辐射通过检测器单元测量，其中检查区域中的吸收分布被准确地或至少准确地从这些测量值重建。 重构使用冗余的测量值，并且包括从不同投影的平行光线导出的测量值，这些值沿着kappa线的积分，这些值的加权和反投影。

公开(公告)号：WO02073174A3

公开(公告)日：2003-02-06

申请号：PCT/IB0200697

申请日：2002-03-08

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY ,  GRASS MICHAEL ,  KOEHLER THOMAS ,  PROKSA ROLAND

Inventor： GRASS MICHAEL ,  KOEHLER THOMAS ,  PROKSA ROLAND

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

CPC classification number: G01N23/046 ,  A61B6/027 ,  G01N2223/419

Abstract: The invention relates to a computed tomography method for forming images of an object to be examined which is arranged in an examination zone. The examination zone is scanned by means of a conical X-ray beam. In order to enable images having a high image quality to be formed from a selected imaging zone while making an as small as possible computational effort, the invention proposes the following steps: a) selecting an imaging zone of the object to be examined, b) determining the sub-regions of the X-ray detector on which the imaging zone of the object to be examined is projected during the acquisition of the projection data, c) forming sub-projection data by selecting the projection data associated with the sub-regions from the acquired projection data, and d) reconstructing the desired image from the sub-projection data by backprojection.

Abstract translation: 本发明涉及一种用于形成布置在检查区中的被检查物体的图像的计算机断层摄影方法。 检查区域通过锥形X射线束扫描。 本发明提供以下步骤：a）选择待检查对象的成像区域，b）为了使所选择的成像区域能够形成具有高图像质量的图像， 确定在获取投影数据期间投影被检查物体的成像区域的X射线检测器的子区域，c）通过选择与子区域相关联的投影数据来形成子投影数据 并且d）通过反投影从副投影数据重建所需图像。

公开(公告)号：DE602006003077D1

公开(公告)日：2008-11-20

申请号：DE602006003077

申请日：2006-03-09

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： ZIEGLER ANDY ,  GRASS MICHAEL ,  KOEHLER THOMAS

IPC: G06T11/00

Abstract: The invention relates to a method and a device for the iterative reconstruction of cross-sectional images of the heart (7) of a patient based on projections (P1, . . . P5) from different directions which are for example generated with a helical cone-beam CT scanner. A cardiac weight function (f) quantifies how near the projections (P1, . . . ) are to a given observation phase (To) of the heart cycle based on simultaneously recorded electrocardiographic signals (ECG). The whole set of projections (P1, . . . ) is divided into subsets (S1, . . . ) which each contain only projections corresponding to a similar cardiac weight (f), and an iterative reconstruction algorithm like ART uses in one update or iteration step all projections of such a subset (S1, . . . ) simultaneously.

公开(公告)号：DE60322673D1

公开(公告)日：2008-09-18

申请号：DE60322673

申请日：2003-01-30

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： GRASS MICHAEL ,  KOEHLER THOMAS

IPC: A61B6/03

Abstract: The invention relates to a computed tomography method in which an examination zone is irradiated from two mutually offset, preferably circular trajectories. In an intermediate region the absorption distribution is reconstructed by means of measuring values from both trajectories, the weight with which the measuring values are used being larger as the distance between the voxel to be reconstructed and the relevant trajectory is smaller.

公开(公告)号：DE50011802D1

公开(公告)日：2006-01-12

申请号：DE50011802

申请日：2000-09-12

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： KOEHLER THOMAS ,  RASCHE VOLKER ,  SABCZYNSKI JOERG

IPC: A61B6/08 ,  A61B6/10 ,  H04N5/32 ,  H04N7/18

Abstract: The apparatus includes an x-ray source (2) and an x-ray detector (3) for continuously detecting x-ray images of a patient from a non-varying position of the x-ray source and detector. Indicator devices (10) illuminate and/or monitor the region above the patient irradiated by the x-rays (62). The indicator devices may be arranged on the x-ray detector and/or on the x-ray source. The devices may include multiple laser diodes, light guides or a UV emitter.

公开(公告)号：DE10252661A1

公开(公告)日：2004-05-27

申请号：DE10252661

申请日：2002-11-11

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： BONTUS CLAAS ,  KOEHLER THOMAS

IPC: G06T11/00 ,  A61B6/03

Abstract: A computer tomography procedure generates (S) a conical beam (4) covering the investigation region (13) and moves (14) the source in a helical (17) path with detection (16) and image (11) reconstruction (10) using beam angle cosine weighted integration. Includes Independent claims for a computer tomograph and computer programs using the procedure.

公开(公告)号：DE10215890A1

公开(公告)日：2003-10-23

申请号：DE10215890

申请日：2002-04-11

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： GRASS MICHAEL ,  KOEHLER THOMAS ,  PROKSA ROLAND

IPC: A61B6/03 ,  G01N23/04 ,  G06T11/00 ,  G01N23/06 ,  H04N5/32

公开(公告)号：WO2012093361A3

公开(公告)日：2012-10-11

申请号：PCT/IB2012050037

申请日：2012-01-04

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY ,  FORTHMANN PETER ,  KOEHLER THOMAS

Inventor： FORTHMANN PETER ,  KOEHLER THOMAS

IPC: G06T11/00

CPC classification number: G06T11/006 ,  G06T2211/416 ,  G06T2211/424

Abstract: The invention relates to an imaging system for imaging an object. Projection data of the object are acquired by using a radiation source emitting primary radiation (14) from a primary focal spot (15) and unwanted secondary radiation (16) from secondary focal spots (17). A first image of the object is reconstructed from the acquired projection data, a forward projection of the secondary radiation through the first image is simulated for generating secondary projection data, and a second image is generated based on the acquired projection data and the secondary projection data. Since the secondary projection data, which can generally cause image artifacts, are determined, the reconstruction unit can consider these unwanted secondary projection data while reconstructing the second image, in order to reduce the influence of the secondary projection data on the reconstructed second image, thereby improving the image quality.

Abstract translation: 本发明涉及一种用于对物体成像的成像系统。 通过使用从主焦点（15）发射主要辐射（14）的辐射源和来自次焦点（17）的不期望的次级辐射（16））来获取对象的投影数据。 从获取的投影数据重建物体的第一图像，模拟通过第一图像的次级辐射的向前投影以产生二次投影数据，并且基于所获取的投影数据和二次投影数据生成第二图像 。 由于确定了通常可以引起图像伪影的二次投影数据，所以重建单元可以在重构第二图像的同时考虑这些不需要的二次投影数据，以便减少二次投影数据对重构的第二图像的影响，由此 提高图像质量。