公开(公告)号：DE602005004413T2

公开(公告)日：2009-01-15

申请号：DE602005004413

申请日：2005-07-04

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： FORTHMANN PETER ,  KOEHLER THOMAS

IPC: G06T11/00

Abstract: The invention relates to a method of computed tomography wherein a radiation source moves relative to an examination zone along a helical trajectory and wherein the movement involves a rotation around a rotational axis and a shifting parallel to the rotational axis. During the movement, a detector unit acquires real measured values. Fictitious measured values are determined from the real measured values by solving John's equation for a virtual movement of the radiation source along an intersection ellipse. The intersection ellipse intersects the helical trajectory at an intersection point and is the intersection of a virtual cylindrical surface, on which the helical trajectory is situated, with an intersection plane that is defined by a tangent vector of the helical trajectory at the intersection point and a vector that is oriented perpendicular to the rotational axis. Finally, an image of the examination zone is reconstructed using the real and fictitious measured values.

公开(公告)号：DE602005004413D1

公开(公告)日：2008-03-06

申请号：DE602005004413

申请日：2005-07-04

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： FORTHMANN PETER ,  KOEHLER THOMAS

IPC: G06T11/00

Abstract: The invention relates to a method of computed tomography wherein a radiation source moves relative to an examination zone along a helical trajectory and wherein the movement involves a rotation around a rotational axis and a shifting parallel to the rotational axis. During the movement, a detector unit acquires real measured values. Fictitious measured values are determined from the real measured values by solving John's equation for a virtual movement of the radiation source along an intersection ellipse. The intersection ellipse intersects the helical trajectory at an intersection point and is the intersection of a virtual cylindrical surface, on which the helical trajectory is situated, with an intersection plane that is defined by a tangent vector of the helical trajectory at the intersection point and a vector that is oriented perpendicular to the rotational axis. Finally, an image of the examination zone is reconstructed using the real and fictitious measured values.

公开(公告)号：DE602004010834T2

公开(公告)日：2008-12-11

申请号：DE602004010834

申请日：2004-10-05

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： VAN STEVENDAAL UDO ,  BONTUS CLAAS ,  FORTHMANN PETER

IPC: G06T11/00

Abstract: Known reconstruction techniques from coherent scattered x-rays apply non-exact reconstruction techniques. According to the present invention, a relatively wide spectrum of wave-vector transfers q of the scattered x-ray photons is acquired. The projection data is interpreted as line integrals in the x y-q space and the projection data is resorted to correspond to an acquisition along any source trajectory. Due to this, an exact helical reconstruction algorithms may be applied and redundant data may be used to obtain a better image quality.

公开(公告)号：DE602004010834D1

公开(公告)日：2008-01-31

申请号：DE602004010834

申请日：2004-10-05

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： VAN STEVENDAAL UDO ,  BONTUS CLAAS ,  FORTHMANN PETER

IPC: G06T11/00

Abstract: Known reconstruction techniques from coherent scattered x-rays apply non-exact reconstruction techniques. According to the present invention, a relatively wide spectrum of wave-vector transfers q of the scattered x-ray photons is acquired. The projection data is interpreted as line integrals in the x y-q space and the projection data is resorted to correspond to an acquisition along any source trajectory. Due to this, an exact helical reconstruction algorithms may be applied and redundant data may be used to obtain a better image quality.

公开(公告)号：WO2013054231A3

公开(公告)日：2013-06-13

申请号：PCT/IB2012055294

申请日：2012-10-03

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY

Inventor： VAN DEN BRINK JOHAN SAMUEL ,  HARVEY PAUL ROYSTON ,  FORTHMANN PETER ,  LEUSSLER CHRISTOPH ,  VERNICKEL PETER ,  WUELBERN JAN HENDRIK ,  GRAESSLIN INGMAR

IPC: G01R33/28 ,  A61B5/055 ,  G01R33/48

CPC classification number: G01R33/31 ,  A61B5/055 ,  A61B2090/3954 ,  A61F7/10 ,  A61F2007/0056 ,  A61F2007/0086 ,  G01R33/28 ,  G01R33/288 ,  G01R33/44 ,  G01R33/4804

Abstract: The invention provides an apparatus(1) for magnetic resonance (MR) examination of a subject (S), comprising: an examination region (3) for accommodating the subject (S) during the MR examination; a radio-frequency system (5) for transmission of a radio-frequency (RF) signal or field into the examination region (3) during the MR examination; and a temperature control system (6) for controlling the temperature of the subject (S) in the examination region (3) during the examination. The temperature control system(6) is configured to actively control or regulate an environment of the subject (S), and thereby the temperature or thermal comformt of the subject (S) based upon a detected and/or an expected temperature of the subject (S) during the MR examination. The invention also provides a method of controlling thermal comfort of the subject (S) during an examination of the subject (S) in a MR apparatus(1), comprising the steps of: estimating and/or detecting a temperature of the subject (S) during the MR examination, and actively controlling or regulating the environment of the subject (S) based upon the estimated and/or detected temperature of the subject (S) during the MR examination.

Abstract translation: 本发明提供了一种用于对象（S）的磁共振（MR）检查的设备（1），包括：在MR检查期间容纳对象（S）的检查区域（3） 射频系统（5），用于在MR检查期间将射频（RF）信号或场传送到检查区域（3）中; 以及用于在检查期间控制检查区域（3）中的对象（S）的温度的温度控制系统（6）。 温度控制系统（6）被配置为基于对象（S）的检测到的和/或预期的温度来主动地控制或调节对象（S）的环境，从而主动地控制对象（S）的温度或热共同 S）在MR检查期间。 本发明还提供了一种在检查MR设备（1）中的对象（S）期间控制对象（S）的热舒适度的方法，包括以下步骤：估计和/或检测对象（S ），并且在MR检查期间基于对象（S）的估计和/或检测温度主动控制或调节对象（S）的环境。

公开(公告)号：WO2005036467A8

公开(公告)日：2005-09-29

申请号：PCT/IB2004051968

申请日：2004-10-05

Applicant: PHILIPS INTELLECTUAL PROPERTY ,  KONINKL PHILIPS ELECTRONICS NV ,  VAN STEVENDAAL UDO ,  BONTUS CLAAS ,  FORTHMANN PETER

Inventor： VAN STEVENDAAL UDO ,  BONTUS CLAAS ,  FORTHMANN PETER

IPC: G06T11/00

CPC classification number: G06T11/006 ,  A61B6/027 ,  G06T2211/416 ,  Y10S378/901

Abstract: Known reconstruction techniques from coherent scattered x-rays apply non-exact reconstruction techniques. According to the present invention, a relatively wide spectrum of wave-vector transfers q of the scattered x-ray photons is acquired. The projection data is interpreted as line integrals in the x y-q space and the projection data is resorted to correspond to an acquisition along any source trajectory. Due to this, an exact helical reconstruction algorithms may be applied and redundant data may be used to obtain a better image quality.

Abstract translation: 来自相干散射X射线的已知重建技术应用非精确重建技术。 根据本发明，获得了散射的x射线光子的相对宽的波矢量传输q。 投影数据被解释为x y-q空间中的线积分，并且投影数据被用来对应于沿着任何源轨迹的获取。 因此，可以应用精确的螺旋重建算法，并且可以使用冗余数据来获得更好的图像质量。

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。

公开(公告)号：WO2009101572A3

公开(公告)日：2010-03-11

申请号：PCT/IB2009050526

申请日：2009-02-09

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY ,  VAN STEVENDAAL UDO ,  FORTHMANN PETER

Inventor： VAN STEVENDAAL UDO ,  FORTHMANN PETER

IPC: G01V5/00 ,  G01T1/164

CPC classification number: G01V5/0016 ,  G01V5/0025 ,  G01V5/005

Abstract: The invention relates to an X-ray apparatus (100) and a method for the examination of a subject (1), comprising the irradiation of the subject (1) with X-rays and the detection of backscattered/reflected photons (X') as well as transmitted photons (X). The apparatus may particularly be used in security applications, e.g. at an airport, for detecting suspect things concealed by a person (1). As an additional benefit, the transmission images of the person (1) may be evaluated with respect to medical anomalies, for example suspect lung nodules.

Abstract translation: 本发明涉及一种用于检查被检体（1）的X射线装置（100）和检查对象（1）的X射线检测和背散射/反射光子（X'）的检测的方法， 以及透射光子（X）。 该装置可以特别用于安全应用，例如， 在机场检测一个人隐藏的嫌疑人（1）。 作为额外的益处，可以针对医疗异常，例如可疑的肺结节来评估人（1）的透射图像。

公开(公告)号：WO2007129244A3

公开(公告)日：2008-01-10

申请号：PCT/IB2007051525

申请日：2007-04-25

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

Inventor： FORTHMANN PETER ,  BONTUS CLAAS ,  KOEHLER THOMAS

IPC: A61B6/03 ,  H01J35/28

CPC classification number: A61B6/032 ,  A61B6/4021 ,  H01J35/101 ,  H01J35/26 ,  H01J35/28 ,  H01J2235/10

Abstract: It is described an X-ray tube (205), in particular for use in computed tomography, comprising an electron source (250), for generating an electron beam (255), an electron deflection device (256) for deflecting the generated electron beam (255), a control unit (257) being coupled to the electron deflection device (256) for spatially controlling the deflection, and an anode (206), which is arranged such that the electron beam (255) impinges onto a focal spot of a surface of the anode (206). Thereby the anode (206) is movable along a z-axis in an oscillating manner, the surface of the anode (206) is oriented oblique with respect to the z-axis, and the control unit (257) is adapted to spatially control the focal spot (255 a) in such a manner that the focal spot moves essentially in a discrete manner between a first focal spot position (106a, 406a) having a first z-coordinate and a second focal spot position (106b, 406b) having a second z-coordinate being different from the first z-coordinate.

Abstract translation: 描述了一种特别用于计算机断层摄影的X射线管（205），包括用于产生电子束（255）的电子源（250），用于使所产生的电子束偏转的电子偏转装置（256） （255），耦合到电子偏转装置（256）的空间控制偏转的控制单元（257）和阳极（206），其布置成使得电子束（255）撞击到 阳极的表面（206）。 因此，阳极（206）可以以振荡方式沿z轴移动，阳极（206）的表面相对于z轴倾斜定向，并且控制单元（257）适于空间控制 焦点（255a），使得焦点基本上以离散的方式移动在具有第一z坐标的第一焦斑位置（106a，406a）和具有第一焦点位置（106b，406b）之间的焦点 第二z坐标与第一z坐标不同。

公开(公告)号：WO2010041193A2

公开(公告)日：2010-04-15

申请号：PCT/IB2009054353

申请日：2009-10-05

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY ,  FORTHMANN PETER ,  KOEHLER THOMAS ,  VAN STEVENDAAL UDO ,  BERTRAM MATTHIAS ,  WIESNER STEFFEN ,  SCHRETTER COLAS

Inventor： FORTHMANN PETER ,  KOEHLER THOMAS ,  VAN STEVENDAAL UDO ,  BERTRAM MATTHIAS ,  WIESNER STEFFEN ,  SCHRETTER COLAS

IPC: G01N23/04 ,  A61B6/03

CPC classification number: A61B6/032 ,  A61B5/107 ,  A61B6/027

Abstract: A method and apparatus are provided to improve CT image acquisition using a displaced acquisition geometry. A CT apparatus may be used having a source (102) and a detector (104) transversely displaced from a center (114) of a field of view (118) during acquisition of the projection data. The amount of transverse displacement may be determined based on the size of the object (108). The source and the detector may be adjusted to vary the size of the transverse field of view. The first data set acquired by the detector may be reconstructed and used to simulate missing projection data that could not be acquired by the detector at each projection angle. The measured projection data and the simulated projection data may be used to obtain a second data set. The second data set may be compared to the first data set to produce a corrected data set.

Abstract translation: 提供了一种方法和装置，用于改善使用位移采集几何形状的CT图像采集。 可以使用CT装置，在获取投影数据期间具有从视场（118）的中心（114）横向移位的源（102）和检测器（104）。 可以基于物体（108）的尺寸来确定横向位移量。 源和检测器可以被调节以改变横向视场的大小。 由检测器获取的第一数据集可以被重构并用于模拟在每个投影角度不能由检测器获取的丢失的投影数据。 所测量的投影数据和模拟投影数据可用于获得第二数据集。 可以将第二数据集与第一数据集进行比较以产生校正数据集。