公开(公告)号：US08585286B2

公开(公告)日：2013-11-19

申请号：US12934661

申请日：2009-03-20

申请人： Amir Livne ,  Naor Wainer ,  Jens-Peter Schlomka ,  Ewald Roessl ,  Roland Proksa

发明人： Amir Livne ,  Naor Wainer ,  Jens-Peter Schlomka ,  Ewald Roessl ,  Roland Proksa

IPC分类号： G01D18/00

CPC分类号： G01T7/005 ,  A61B6/032 ,  A61B6/4035 ,  A61B6/4042 ,  A61B6/4441 ,  A61B6/482 ,  A61B6/585 ,  G01N2223/3037 ,  G01T1/1647

摘要： A method includes detecting radiation that traverses a material having a known spectral characteristic with a radiation sensitive detector pixel that outputs a signal indicative of the detected radiation and determining a mapping between the output signal and the spectral characteristic. The method further includes determining an energy of a photon detected by the radiation sensitive detector pixel based on a corresponding output of the radiation sensitive detector pixel and the mapping.

摘要翻译： 一种方法包括利用辐射敏感检测器像素检测穿过具有已知光谱特性的材料的辐射，所述辐射敏感检测器像素输出指示检测到的辐射的信号并确定输出信号和光谱特性之间的映射。 该方法还包括基于辐射敏感检测器像素的对应输出和映射来确定由辐射敏感检测器像素检测到的光子的能量。

公开(公告)号：US20100270472A1

公开(公告)日：2010-10-28

申请号：US12665558

申请日：2008-05-23

申请人： Roand Proksa ,  Jens-Peter Schlomka ,  Ewald Roessl ,  Tuvia Liran ,  Aviv Marks

发明人： Roand Proksa ,  Jens-Peter Schlomka ,  Ewald Roessl ,  Tuvia Liran ,  Aviv Marks

IPC分类号： G01T1/17

CPC分类号： G01T1/171

摘要： An apparatus includes a local minimum identifier (408) that identifies a local minimum between overlapping pulses in a signal, wherein the pulses have amplitudes that are indicative of the energy of successively detected photons from a multi-energetic radiation beam by a radiation sensitive detector, and a pulse pile-up error corrector (232) that corrects, based on the local minimum, for a pulse pile-up energy-discrimination error when energy-discriminating the pulses using at least two thresholds corresponding to different energy levels. This technique may reduce spectral error when counting photons at a high count rate.

摘要翻译： 一种装置包括识别信号中重叠脉冲之间的局部最小值的局部最小标识符（408），其中脉冲具有指示由辐射敏感检测器从多能辐射束连续检测到的光子的能量的幅度， 以及脉冲堆积误差校正器（232），其基于局部最小值来校正针对对应于不同能级的至少两个阈值对脉冲进行能量鉴别的脉冲堆积能量鉴别误差。 当以高计数率计数光子时，该技术可能降低光谱误差。

公开(公告)号：US07590215B2

公开(公告)日：2009-09-15

申请号：US11569806

申请日：2005-06-01

申请人： Jens-Peter Schlomka

发明人： Jens-Peter Schlomka

IPC分类号： A61B6/00

CPC分类号： A61B6/032 ,  A61B6/06 ,  A61B6/4291 ,  A61B6/483 ,  G01N23/201

摘要： Conventional CSCT may require a complex reconstruction involving a large number of calculations. According to an exemplary embodiment of the present invention, additional collimators are used in combination with energy revolving detectors, which may allow that a CSCT image may be reconstructed by a simple superposition of images obtained from different viewing angles in a direct tomography data acquisition scheme. Advantageously, a reconstruction may be avoided. Advantageously, this may allow for an improved image quality while reducing an amount of calculations required for generating the output image.

摘要翻译： 常规CSCT可能需要涉及大量计算的复杂重构。 根据本发明的示例性实施例，附加的准直器与能量循环检测器组合使用，这可以允许通过在直接层析成像数据采集方案中从不同视角获得的图像的简单叠加来重构CSCT图像。 有利地，可以避免重建。 有利地，这可以允许改善图像质量，同时减少生成输出图像所需的计算量。

公开(公告)号：US07587021B2

公开(公告)日：2009-09-08

申请号：US11813126

申请日：2006-01-10

申请人： Jens-Peter Schlomka

发明人： Jens-Peter Schlomka

IPC分类号： G01N23/04 ,  G01N23/20

CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/4085 ,  A61B6/4241 ,  A61B6/482 ,  A61B6/483 ,  A61B6/5205

摘要： A computer tomography apparatus for examination of an object of interest includes detecting elements adapted to detect electromagnetic radiation scattered from the object of interest in an energy-resolving manner. A combination unit is adapted to combine signals detected by different detecting elements such as to reduce the amount of data to be processed for determining structural information concerning the object of interest.

摘要翻译： 用于检查感兴趣对象的计算机断层摄影装置包括适于以能量分辨方式检测从感兴趣对象散射的电磁辐射的检测元件。 组合单元适于组合由不同检测元件检测到的信号，以减少要处理的数据量，以确定关于感兴趣对象的结构信息。

公开(公告)号：US20090161817A1

公开(公告)日：2009-06-25

申请号：US11568118

申请日：2005-04-12

申请人： Jens-Peter Schlomka

发明人： Jens-Peter Schlomka

IPC分类号： A61B6/00

CPC分类号： A61B6/5282 ,  A61B6/032 ,  A61B6/4291 ,  A61B6/483 ,  G01N23/201 ,  G01V5/0025 ,  G01V5/005

摘要： However, this requires additional collimating means and this reduces the photon flux applied to the detectors. Due to this, longer measuring times may be required. Furthermore, the geometry is incompatible to known cone-beam CT-scanners. According to an exemplary embodiment of the present invention, a cone-beam CSCT scanner is provided using energy resolving detectors with a collimator arranged on the detectors, which allows spatially-resolved reconstruction of the scattering function. Advantageously, this may allow for an improved scanning speed in baggage inspection or medical applications.

摘要翻译： 然而，这需要额外的准直装置，并且这降低了施加到检测器的光子通量。 因此，可能需要更长的测量时间。 此外，几何形状与已知的锥形CT扫描仪不兼容。 根据本发明的示例性实施例，使用能量分辨检测器提供锥形光束CSCT扫描器，其中准直器布置在检测器上，允许空间分辨重建散射函数。 有利地，这可以允许行李检查或医疗应用中的改进的扫描速度。

公开(公告)号：US07545910B2

公开(公告)日：2009-06-09

申请号：US10547588

申请日：2004-03-02

申请人： Geoffrey Harding ,  Jens-Peter Schlomka ,  Gerhard Martens

发明人： Geoffrey Harding ,  Jens-Peter Schlomka ,  Gerhard Martens

IPC分类号： G01N23/223

CPC分类号： A61B6/485 ,  A61B6/00 ,  A61B6/4092 ,  G01N23/223 ,  G01N2223/076

摘要： The invention describes a method of generating metabolic images of an investigation region (3) of a body (1) by irradiating an X-ray fluorescence marker in that region and detecting the resulting X-ray fluorescence with a fluorescence detector (30). A fan beam (12) is used as a source of primary X-radiation, thus allowing the scanning of a whole body slice (3) in one step. The fluorescence image may be directly measured, e.g. by mapping voxels (104) of the investigation region onto pixels (134) of the detector (130) with the help of a pinhole collimator (132), or it may be reconstructed by procedures of computed tomography. Moreover, a morphological image may be generated by simultaneously recording X-ray transmission through the body (1).

摘要翻译： 本发明描述了通过在该区域中照射X射线荧光标记物并用荧光检测器（30）检测所得到的X射线荧光来产生身体（1）的调查区域（3）的代谢图像的方法。 扇形光束（12）被用作初级X辐射源，从而允许在一个步骤中扫描全身切片（3）。 可以直接测量荧光图像，例如。 通过借助于针孔准直器（132）将调查区域的体素（104）映射到检测器（130）的像素（134）上，或者可以通过计算机断层摄影的程序来重构。 此外，可以通过同时记录穿过身体（1）的X射线透射来产生形态学图像。

公开(公告)号：US07418073B2

公开(公告)日：2008-08-26

申请号：US10534159

申请日：2003-10-24

申请人： Jens-Peter Schlomka ,  Michael Graβ

发明人： Jens-Peter Schlomka ,  Michael Graβ

IPC分类号： G01N23/201

CPC分类号： A61B6/032 ,  A61B6/4085 ,  A61B6/4291 ,  G06T11/006 ,  G06T2211/421

摘要： The invention relates to a computed tomography method in which an examination zone is irradiated along a circular trajectory by a fan-shaped radiation beam. Radiation coherently scattered in the examination zone is measured by a detector unit, the variation in space of the scatter intensity in the examination zone being reconstructed from said measuring values. Reconstruction is performed by back projection in a volume which is defined by two linearly independent vectors of the rotational plane and a wave vector transfer.

摘要翻译： 本发明涉及一种计算机断层摄影方法，其中通过扇形辐射束沿着圆形轨迹照射检查区。 通过检测器单元测量在检查区域中相干散射的辐射，从所述测量值重建检查区域中的散射强度的空间变化。 通过由旋转平面的两个线性独立向量和波矢量传递限定的体积中的反投影执行重建。

公开(公告)号：US20070172022A1

公开(公告)日：2007-07-26

申请号：US10598568

申请日：2005-03-01

申请人： Jens-Peter Schlomka ,  Michael Dargatz

发明人： Jens-Peter Schlomka ,  Michael Dargatz

IPC分类号： A61B6/00 ,  G01N23/00 ,  G21K1/12 ,  H05G1/60

CPC分类号： A61B6/032 ,  A61B6/483

摘要： Due to the provision of slit collimators an intensity of a fan beam is reduced significantly such that expensive high power x-ray tubes have to be used. According to an exemplary embodiment of the present invention, a high power tube may be used with a very long focus in combination with a focusing collimator. The tube can be a cheap fixed anode tube still with a high power of, for example, 15 kW due to the large focus. The collimator may ensure that the resolution of the reconstructed scatter function is not degraded. The illuminated slice thickness is increased which may allow for an isotropic spatial resolution.

摘要翻译： 由于提供狭缝准直器，风扇光束的强度显着降低，从而必须使用昂贵的大功率X射线管。 根据本发明的示例性实施例，可以与聚焦准直器结合使用具有非常长焦距的高功率管。 该管可以是由于焦距较大而仍具有例如15kW的高功率的便宜的固定阳极管。 准直器可以确保重建散射函数的分辨率不降低。 照明的切片厚度增加，这可以允许各向同性的空间分辨率。