公开(公告)号：US08175356B2

公开(公告)日：2012-05-08

申请号：US12513370

申请日：2007-10-24

Applicant: Babak Movassaghi ,  Michael Grass ,  Dirk Schaefer

Inventor： Babak Movassaghi ,  Michael Grass ,  Dirk Schaefer

IPC: G06K9/00

CPC classification number: A61B6/5217 ,  A61B6/027 ,  A61B6/503 ,  A61B6/504 ,  A61B6/541 ,  G06T7/254 ,  G06T2207/30048

Abstract: For the reconstruction of the coronary arteries from rotational coronary angiography data, a crucial point is the selection of the optimal cardiac phase for data reconstruction. According to an exemplary embodiment of the present invention, an automatic approach for deriving optimal reconstruction windows is provided by fully automatically selecting the optimal cardiac phase on the basis of a delayed acquisition protocol where at least one heart phase needs to be acquired in a static projection geometry.

Abstract translation: 对于从旋转冠状动脉造影数据重建冠状动脉，关键点是数据重建的最佳心脏相位的选择。 根据本发明的示例性实施例，通过基于延迟获取协议完全自动选择最佳心脏相位来提供用于导出最佳重建窗口的自动方法，其中需要在静态投影中获取至少一个心脏相位 几何。

公开(公告)号：US20120014582A1

公开(公告)日：2012-01-19

申请号：US13254001

申请日：2010-02-18

Applicant: Dirk Schaefer ,  Michael Grass

Inventor： Dirk Schaefer ,  Michael Grass

IPC: G06K9/00

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

Abstract: A method and apparatus are provided to reconstruct projection data obtained from CT imaging devices with offset detector geometries. According to one aspect of the present invention, a method is provided to reconstruct projection data obtained from CT imaging devices with offset detector geometries that includes the following steps: (i) matching projection data measured at opposing sides of the acquisition trajectory and splicing them together to generate a full, non-truncated projection data set; (ii) differentiation of the projection data; (iii) filtering the differentiated projection data with a filter, such as for example a Hilbert filter; (iv) applying redundancy weighting to the filtered projection data; and (v) back-projecting the redundancy weighted projection data to generate image data.

Abstract translation: 提供了一种方法和装置来重构从具有偏移检测器几何形状的CT成像装置获得的投影数据。 根据本发明的一个方面，提供了一种用于重建从具有偏移检测器几何的CT成像装置获得的投影数据的方法，其包括以下步骤：（i）匹配在获取轨迹的相对侧测量的投影数据并将它们拼接在一起 生成一个完整的，非截断的投影数据集; （ii）投影数据的区分; （iii）用滤波器（例如希尔伯特滤波器）过滤差分投影数据; （iv）对过滤的投影数据应用冗余权重; 和（v）反向投影冗余加权投影数据以产生图像数据。

公开(公告)号：US20100232672A1

公开(公告)日：2010-09-16

申请号：US12673508

申请日：2008-08-12

Applicant: Uwe Jandt ,  Dirk Schaefer ,  Michael Grass

Inventor： Uwe Jandt ,  Dirk Schaefer ,  Michael Grass

IPC: G06K9/00 ,  G06K9/40

CPC classification number: G06T5/50 ,  G06T7/12 ,  G06T7/155 ,  G06T2207/10081 ,  G06T2207/10121 ,  G06T2207/30021

Abstract: A system (900) and method for automatic projection-based removing of high-contrast artificial objects from a medical image is provided. The method comprises performing a low-pass filtering (1100) to the two-dimensional image (100, 500, 1000) using a filter width range (1110) corresponding to structures of a line-shaped artificial object to generate a low-pass filtered intensity image and performing an evaluation of the Hessian matrix of each pixels of the low-pass filtered intensity image for locating and enhancing the structure of the line-shaped artificial object to generate a multi-scale filtered intensity image, wherein predefined scaling widths are used in order to avoid the locating and enhancing of larger structures.

Abstract translation: 提供了一种用于从医学图像自动投影去除高对比度人造物体的系统（900）和方法。 该方法包括使用对应于线状人造物体的结构的滤波器宽度范围（1110）对二维图像（100,500,1000）进行低通滤波（1100），以生成低通滤波 强度图像，并对低通滤波强度图像的每个像素的Hessian矩阵进行评估，以定位和增强线状人造物体的结构，以生成多尺度滤波强度图像，其中使用预定义的缩放宽度 以避免更大的结构的定位和增强。

公开(公告)号：US20100074485A1

公开(公告)日：2010-03-25

申请号：US12513370

申请日：2007-10-24

Applicant: Babak Movassaghi ,  Michael Grass ,  Dirk Schaefer

Inventor： Babak Movassaghi ,  Michael Grass ,  Dirk Schaefer

IPC: G06K9/00

CPC classification number: A61B6/5217 ,  A61B6/027 ,  A61B6/503 ,  A61B6/504 ,  A61B6/541 ,  G06T7/254 ,  G06T2207/30048

Abstract: For the reconstruction of the coronary arteries from rotational coronary angiography data, a crucial point is the selection of the optimal cardiac phase for data reconstruction. According to an exemplary embodiment of the present invention, an automatic approach for deriving optimal reconstruction windows is provided by fully automatically selecting the optimal cardiac phase on the basis of a delayed acquisition protocol where at least one heart phase needs to be acquired in a static projection geometry.

Abstract translation: 对于从旋转冠状动脉造影数据重建冠状动脉，关键点是数据重建的最佳心脏相位的选择。 根据本发明的示例性实施例，通过基于延迟获取协议完全自动选择最佳心脏相位来提供用于导出最佳重建窗口的自动方法，其中需要在静态投影中获取至少一个心脏相位 几何。

公开(公告)号：US20090141935A1

公开(公告)日：2009-06-04

申请号：US12093458

申请日：2006-11-14

Applicant: Michael Grass ,  Dirk Schaefer ,  Udo Van Stevendaal

Inventor： Michael Grass ,  Dirk Schaefer ,  Udo Van Stevendaal

IPC: G06K9/00

CPC classification number: A61B6/032 ,  A61B6/027 ,  A61B6/12 ,  A61B6/541 ,  G06T7/20 ,  G06T11/006 ,  G06T2207/10081 ,  G06T2207/30048 ,  G06T2211/412

Abstract: Cardiac CT imaging using gated reconstruction is currently limited in its temporal and spatial resolution. According to an exemplary embodiment of the present invention, an examination apparatus is provided in which an identification of a high contrast object is performed. This high contrast object is then followed through the phases, resulting in a motion vector field of the high contrast object, on the basis of which a motion compensated reconstruction is then performed.

Abstract translation: 使用门控重建的心脏CT成像目前在其时间和空间分辨率方面受到限制。 根据本发明的示例性实施例，提供一种检查装置，其中执行高对比度对象的识别。 然后，该对比度较高的对象随后进入相位，导致高对比度对象的运动矢量场，然后基于此进行运动补偿重建。

公开(公告)号：US20070208136A1

公开(公告)日：2007-09-06

申请号：US11484493

申请日：2006-07-11

Applicant: Victor Nasreddine ,  Sharon Guo ,  Dirk Schaefer ,  Christopher Ong

Inventor： Victor Nasreddine ,  Sharon Guo ,  Dirk Schaefer ,  Christopher Ong

IPC: C08L77/00

CPC classification number: C08L77/00 ,  C08L9/02 ,  C08L13/00 ,  C08L15/005 ,  C08L33/18 ,  C08L33/22 ,  C08L77/02 ,  C08L77/06 ,  C08L2666/14 ,  C08L2666/08 ,  C08L2666/26 ,  C08L2666/04

Abstract: The present invention relates to thermoplastic vulcanizates (TPVs) based on low Mooney, optionally hydrogenated nitrile butadiene rubber and polyamides. The present invention also relates to TPVs based on low Mooney, optionally, hydrogenated nitrile terpolymers and polyamides. TPVs prepared according to the present invention have improved morphology, smaller rubber particle size, and improved processability compared to TPVs containing non-low Mooney, optionally hydrogenated nitrile butadiene rubber.

Abstract translation: 本发明涉及基于低门尼，任选氢化丁腈橡胶和聚酰胺的热塑性硫化橡胶（TPV）。 本发明还涉及基于低门尼，任选的氢化腈三元共聚物和聚酰胺的TPV。 根据本发明制备的TPV与含有非低门尼，任选氢化的丁腈橡胶的TPV相比具有改进的形态，较小的橡胶粒度和改进的加工性能。

公开(公告)号：US20070049699A1

公开(公告)日：2007-03-01

申请号：US11484796

申请日：2006-07-11

Applicant: Victor Nasreddine ,  Sharon Guo ,  Dirk Schaefer ,  Christopher Ong

Inventor： Victor Nasreddine ,  Sharon Guo ,  Dirk Schaefer ,  Christopher Ong

IPC: C08F20/44

CPC classification number: C08C19/02 ,  C08C19/08 ,  C08L13/00 ,  C08L15/005

Abstract: The present invention relates to a process for the production of optionally hydrogenated nitrile terpolymers having lower molecular weights, lower Mooney viscosities and narrower molecular weight distributions than those known in the art. The present invention also relates to optionally hydrogenated nitrile terpolymers having lower molecular weights, lower Mooney viscosities and narrower molecular weight distributions than those known in the art.

Abstract translation: 本发明涉及制备任选氢化的腈三元共聚物的方法，所述三元共聚物具有比本领域已知的低分子量，较低的门尼粘度和较窄的分子量分布。 本发明还涉及任选氢化的腈三元共聚物，其具有比本领域已知的更低的分子量，更低的门尼粘度和更窄的分子量分布。