公开(公告)号：EP1701307A2

公开(公告)日：2006-09-13

申请号：EP06004332.0

申请日：2006-03-03

申请人： KABUSHIKI KAISHA TOSHIBA ,  Toshiba Medical Systems Corporation

发明人： Okumura, Miwa c/o Intellectual Property Division ,  Nakanishi, Satoru c/o Intellectual Property Div. ,  Tsuyuki, Masaharu c/o Intellectual Property Div. ,  Saito, Yasuo c/o Intellectual Property Division

IPC分类号： G06T11/00

CPC分类号： A61B6/032 ,  A61B6/4014 ,  A61B6/405 ,  A61B6/482 ,  G06T11/006 ,  G06T2211/412

摘要： An X-ray CT apparatus comprises three X-ray generating units, three groups of detecting elements and a reconstructing unit. The three X-ray generating units are arranged so as to make an angle formed by a first X-ray exposure direction and a second X-ray exposure direction on a rotational plane thereof be a same angle as that formed by the second X-ray exposure direction and a third X-ray exposure direction on the rotational plane, the same angle being smaller than 120 degree. The three groups of detecting elements are arranged opposite to the three X-ray generating units respectively so as to make a field of view formed in a center wider than two side fields of view. The reconstructing unit is configured to reconstruct an image using detection data detected by at least desired one of the three groups of the detecting elements.

摘要翻译： X射线CT装置包括三个X射线产生单元，三组检测元件和重建单元。 三个X射线产生单元被布置成使得其旋转平面上由第一X射线曝光方向和第二X射线曝光方向形成的角度与由第二X射线 曝光方向和旋转平面上的第三X射线曝光方向，相同的角度小于120度。 三组检测元件分别与三个X射线产生单元相对地布置，以便形成在比两个侧视场宽的中心的视场。 重建单元被配置为使用由三组检测元件中的至少期望的一组检测的检测数据来重建图像。

公开(公告)号：EP1699014A2

公开(公告)日：2006-09-06

申请号：EP05018698.0

申请日：2005-08-29

申请人： KABUSHIKI KAISHA TOSHIBA ,  Toshiba Medical Systems Corporation

发明人： Taguchi, Katsuyuki Intellectual Property Division

IPC分类号： G06T5/00 ,  G06T11/00 ,  A61B6/00

CPC分类号： G06T11/005 ,  A61B6/027 ,  G06T2211/412

摘要： A method for reconstructing an image, including obtaining (1401) projection data using an X-ray detector and one of a cone-beam X-ray generator and a fan-beam X-ray generator, filtering (1402) the obtained projection data using a ramp-based filtering function to generate filtered projection data, weighting (1402) the filtered projection data to compensate for redundant projection data, and reconstructing (1403) the image by back-projecting the weighted projection data along a radial path.

摘要翻译： 一种用于重建图像的方法，包括使用X射线检测器和锥形束X射线发生器和扇形束X射线发生器之一获得（1401）投影数据，使用 基于斜坡的滤波功能以产生滤波的投影数据，对经滤波的投影数据加权（1402）以补偿冗余投影数据，以及通过沿径向路径反投影加权投影数据来重建（1403）图像。

公开(公告)号：EP1668596A1

公开(公告)日：2006-06-14

申请号：EP04767004.7

申请日：2004-08-20

申请人： Ruotsalainen, Ulla ,  Happonen, Antti ,  Alenius, Sakari

发明人： Ruotsalainen, Ulla ,  Happonen, Antti ,  Alenius, Sakari

IPC分类号： G06T11/00 ,  A61B6/03

CPC分类号： G06T11/005 ,  A61B6/037 ,  A61B6/5205 ,  A61B6/5264 ,  G06T2211/412

摘要： The present invention relates to motion correction of tomographic images so that in filtering the measurement information, information is lost as little as possible. In the method of the invention, the measurement information, sinograms, are transformed to stackgrams (10). The motion correction is made by comparing the locus signals being generated from the sine waves of the stackgram to a reference signal (11). The signal best corresponding to the reference is transferred into its correct place (12). When the comparison has been performed for all the signals (13), the stackgrams are transformed back to sinograms, or are constructed directly to images (14).

公开(公告)号：EP1654704A2

公开(公告)日：2006-05-10

申请号：EP04744972.3

申请日：2004-07-14

申请人： Paieon Inc.

发明人： ZARKH, Michael ,  KLAIMAN, Moshe

IPC分类号： G06T7/20

CPC分类号： G06T11/005 ,  A61B5/7285 ,  A61B6/503 ,  A61B6/504 ,  A61B6/541 ,  G06T7/20 ,  G06T2211/404 ,  G06T2211/412

摘要： A method and system for quantifying a cyclic motion within a series of images depicting a moving object subject to composite motion containing a cyclic component and a non-cyclic component of lower frequency than the cyclic component. Composite motion is computed. The non-cyclic component is computed as the integral of motion over a motion cycle. The non-cyclic component is subtracted from the composite motion so as to obtain the cyclic component.

公开(公告)号：EP1649426A2

公开(公告)日：2006-04-26

申请号：EP04744511.9

申请日：2004-07-07

申请人： Philips Intellectual Property & Standards GmbH ,  Koninklijke Philips Electronics N.V.

发明人： KÖHLER, Thomas, c/o Philips Int. Pty. &Stand. GmbH ,  GRASS, Michael, c/o Philips Int. Pty. & Stand GmbH ,  KUHN, Michael H., c/o Philips Int. Pty. & St. GmbH ,  PROKSA, Roland, c/o Philips Int. Pty. & Stand GmbH

IPC分类号： G06T11/00

CPC分类号： G06T7/20 ,  G06T11/005 ,  G06T2207/10081 ,  G06T2207/30048 ,  G06T2211/404 ,  G06T2211/412

摘要： In the CT imaging of non-homogeneously moving objects such as the heart or the coronary vessel tree, there is a problem that different parts of the objects are at rest at different points in time. Thus, a gated reconstruction with a globally selected time point does not yield a sharp image of such objects. According to the present invention, a motion of the object is estimated, describing the motion of selected regions of these objects. Then, on the basis of the estimated motion, time points are determined, where these areas have minimal motion. Then, an image is reconstructed, wherein the data from which the respective regions are reconstructed, correspond to the respective time points, where the regions have minimal motion. Due to this, an improved image quality may be provided.

摘要翻译： 在诸如心脏或冠状血管树之类的非均匀运动物体的CT成像中，存在不同部分的物体在不同时间点处于静止状态的问题。 因此，具有全局选择的时间点的门控重构不会产生这样的对象的清晰图像。 根据本发明，估计对象的运动，描述这些对象的选定区域的运动。 然后，基于估计的运动，确定时间点，其中这些区域具有最小的运动。 然后，重建图像，其中各个区域被重建的数据对应于各个时间点，其中区域具有最小的运动。 由此，可以提供改善的图像质量。

公开(公告)号：EP1394747A1

公开(公告)日：2004-03-03

申请号：EP03255316.6

申请日：2003-08-27

申请人： GE Medical Systems Global Technology Company LLC

发明人： Launay, Laurent ,  Knoplioch, Jerome ,  Okerlund, Darin R.

IPC分类号： G06T11/00

CPC分类号： G06T11/008 ,  G06T2211/412

摘要： A composite image of an artery is produced by reconstruction synchronized after a scanner acquires (101) data during an examination, the data being acquired from several phases of a cardiac cycle. The data is extracted locally, the localization corresponding to the section of the artery for which it is desired to improve the quality of the image. The localization is obtained through a plotting (103) of the artery in a selected volume image (102). An image is obtained (105-107) in which each section of the artery is displayed on the basis of data coming from the phase of the cardiac cycle most appropriate to the display of this section.

摘要翻译： 在扫描仪在检查期间获取（101）数据之前通过重构同步产生动脉的复合图像，数据从心动周期的几个相位获取。 本地提取数据，对应于期望提高图像质量的动脉部分的定位。 通过在所选择的体积图像（102）中的动脉的绘图（103）获得定位。 获得图像（105-107），其中基于来自最适合于该部分的显示的心动周期的数据显示动脉的每个部分。

公开(公告)号：EP1310913A1

公开(公告)日：2003-05-14

申请号：EP02257740.7

申请日：2002-11-07

申请人： GE Medical Systems Global Technology Company LLC

发明人： Okerlund, Darin Robert ,  Srinivas, Sankar V. ,  Knoplioch, Jerome Francois

IPC分类号： G06T5/00

CPC分类号： G06T11/005 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4085 ,  A61B6/503 ,  A61B6/541 ,  G06T2211/412

摘要： A method and apparatus for generating an optimally registered working set of two-dimensional CT images in a gated CT system are described. The method includes, where an acquisition period is divided into sequential acquisition phases, obtaining CT image data for separate phase ranges during each acquisition phase, dividing the ROI into several adjacent sub-volumes generating phase image sets including 2D images for each phase range within each sub-volume and selecting one phase range image set within each sub-volume corresponding to each acquisition phase to generate a working image set where the selected phase range image sets are optimally aligned.

公开(公告)号：EP0752684B1

公开(公告)日：2002-05-02

申请号：EP96401448.4

申请日：1996-07-01

申请人： COMMISSARIAT A L'ENERGIE ATOMIQUE

发明人： De Murcia, Jérôme ,  Grangeat, Pierre

IPC分类号： G06T11/00

CPC分类号： G06T11/006 ,  G06T2211/412 ,  G06T2211/424

公开(公告)号：EP0953942A3

公开(公告)日：2000-12-27

申请号：EP99115634.0

申请日：1994-11-23

申请人： KABUSHIKI KAISHA TOSHIBA

发明人： Nobuta, Yasuo ,  Toki, Yusuke ,  Hiraoka, Manabu ,  Sugihara, Naoki ,  Ozaki, Masahiro

IPC分类号： G06T11/00

CPC分类号： A61B6/481 ,  A61B5/0456 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4447 ,  A61B6/463 ,  A61B6/488 ,  A61B6/504 ,  A61B6/541 ,  G06T11/006 ,  G06T2211/412 ,  G06T2211/428

摘要： A computerized tomography apparatus is disclosed which is able to selectively switch between a continuous scan mode and a single scan mode. Further, a scanogram may be achieved and displayed together with an adjustable line cursor, a couch carrying a subject being controlled to a position where a region of interest corresponds to the line cursor. The projection data acquisition can be interrupted and the couch can be moved back to the position corresponding to the last tomography image data.

公开(公告)号：EP0953942A2

公开(公告)日：1999-11-03

申请号：EP99115634.0

申请日：1994-11-23

申请人： KABUSHIKI KAISHA TOSHIBA

发明人： Nobuta, Yasuo ,  Toki, Yusuke ,  Hiraoka, Manabu ,  Sugihara, Naoki ,  Ozaki, Masahiro

IPC分类号： G06T11/00

CPC分类号： A61B6/481 ,  A61B5/0456 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4447 ,  A61B6/463 ,  A61B6/488 ,  A61B6/504 ,  A61B6/541 ,  G06T11/006 ,  G06T2211/412 ,  G06T2211/428

摘要： A computerized tomography apparatus is disclosed which is able to selectively switch between a continuous scan mode and a single scan mode. Further, a scanogram may be achieved and displayed together with an adjustable line cursor, a couch carrying a subject being controlled to a position where a region of interest corresponds to the line cursor. The projection data acquisition can be interrupted and the couch can be moved back to the position corresponding to the last tomography image data.

摘要翻译： 公开了能够选择性地在连续扫描模式和单次扫描模式之间切换的计算机断层摄影装置。 此外，扫描图可以与可调节线光标一起实现并显示，携带对象的沙发被控制到感兴趣区域对应于线光标的位置。 可以中断投影数据采集，并将沙发移回到与最后层析成像图像数据对应的位置。