公开(公告)号：US08457916B2

公开(公告)日：2013-06-04

申请号：US12919223

申请日：2009-03-03

申请人： Dayu Chen ,  Ming Yan

发明人： Dayu Chen ,  Ming Yan

IPC分类号： G01D18/00

CPC分类号： G01V3/104 ,  A61B5/0522 ,  A61B5/0536 ,  A61B2560/0223 ,  A61B2560/0228

摘要： This invention relates to a method and device for calibrating the offset of an imaging system. The core idea of the invention is to place a reference object in the measurement chamber of the imaging system, measure the signals associated with the reference object at different points of time, calculate the merit function based on changes of the parameters representing the electromagnetic property of the reference object, and derive an optimal set of offset data that minimizes the value of the merit function for compensating the offset of the system in subsequent image reconstructions. In one embodiment, the invention uses a reference object comprising a non-conductive envelope and a cavity which can be filled with a conductive fluid and emptied, and in this way reduces the imaging interference caused by the reference object during monitoring.

摘要翻译： 本发明涉及用于校准成像系统偏移的方法和装置。 本发明的核心思想是将参考对象放置在成像系统的测量室中，在不同时间点测量与参考对象相关联的信号，基于代表电磁特性参数的变化计算优值函数 并且导出最小化用于补偿随后图像重建中的系统的偏移的优值函数的值的最佳偏移数据集合。 在一个实施例中，本发明使用包括不导电封套和可以填充有导电流体并排空的空腔的参考对象，并且以这种方式减小了在监视期间由参考对象引起的成像干扰。

公开(公告)号：US07755981B2

公开(公告)日：2010-07-13

申请号：US12093960

申请日：2006-11-14

申请人： Dayu Chen ,  Henk Goossens

发明人： Dayu Chen ,  Henk Goossens

IPC分类号： G11B21/08

CPC分类号： G11B7/14 ,  G11B7/08505

摘要： The invention relates to a method and system for recording data by a plurality of laser beams (A, B) on an optical disc, said optical disc comprising segments which (1-51) are each identified by a synchronization pattern, said plurality of laser beams comprising at least a first laser beam (A) which has a first position on said optical disc for recording/reading data on a first segment and a second laser beam (B) which has a second position on said optical disc for recording data on a second segment, said method comprising the steps of: —calculating (410) said second position from said first position and the relative distance between said first laser beam and said second laser beam, —detecting (420) a synchronization pattern by said second laser beam, and —starting (430) to record data with said second laser beam on the basis of said second position and said detected synchronization pattern.

摘要翻译： 本发明涉及一种用于通过多个激光束（A，B）在光盘上记录数据的方法和系统，所述光盘包括（1-51）每个由同步图案识别的段，所述多个激光 至少包括第一激光束（A）的光束，所述第一激光束（A）在所述光盘上具有用于在第一片段上记录/读取数据的第一位置和在所述光盘上具有第二位置的第二激光束（B），用于记录数据 第二段，所述方法包括以下步骤：从所述第一位置计算（410）所述第二位置和所述第一激光束与所述第二激光束之间的相对距离， - 通过所述第二激光器（420）检测（420）同步图案 基于所述第二位置和所述检测到的同步模式，射束和开始（430）以与所述第二激光束记录数据。

公开(公告)号：US20110004432A1

公开(公告)日：2011-01-06

申请号：US12919223

申请日：2009-03-03

申请人： Dayu Chen ,  Ming Yan

发明人： Dayu Chen ,  Ming Yan

IPC分类号： G01R35/00 ,  G06F19/00 ,  G01R33/58

CPC分类号： G01V3/104 ,  A61B5/0522 ,  A61B5/0536 ,  A61B2560/0223 ,  A61B2560/0228

摘要： This invention relates to a method and device for calibrating the offset of an imaging system. The core idea of the invention is to place a reference object in the measurement chamber of the imaging system, measure the signals associated with the reference object at different points of time, calculate the merit function based on changes of the parameters representing the electromagnetic property of the reference object, and derive an optimal set of offset data that minimizes the value of the merit function for compensating the offset of the system in subsequent image reconstructions. In one embodiment, the invention uses a reference object comprising a non-conductive envelope and a cavity which can be filled with a conductive fluid and emptied, and in this way reduces the imaging interference caused by the reference object during monitoring.

摘要翻译： 本发明涉及用于校准成像系统偏移的方法和装置。 本发明的核心思想是将参考对象放置在成像系统的测量室中，在不同时间点测量与参考对象相关联的信号，基于代表电磁特性参数的变化计算优值函数 并且导出最小化用于补偿随后图像重建中的系统的偏移的优值函数的值的最佳偏移数据集合。 在一个实施例中，本发明使用包括不导电封套和可以填充有导电流体并排空的空腔的参考对象，并且以这种方式减小了在监视期间由参考对象引起的成像干扰。

公开(公告)号：US20080253268A1

公开(公告)日：2008-10-16

申请号：US12093960

申请日：2006-11-14

申请人： Dayu Chen ,  Henk Goossens

发明人： Dayu Chen ,  Henk Goossens

IPC分类号： G11B7/00

CPC分类号： G11B7/14 ,  G11B7/08505

摘要： The invention relates to a method and system for recording data by a plurality of laser beams (A, B) on an optical disc, said optical disc comprising segments which (1-51) are each identified by a synchronization pattern, said plurality of laser beams comprising at least a first laser beam (A) which has a first position on said optical disc for recording/reading data on a first segment and a second laser beam (B) which has a second position on said optical disc for recording data on a second segment, said method comprising the steps of: —calculating (410) said second position from said first position and the relative distance between said first laser beam and said second laser beam, —detecting (420) a synchronization pattern by said second laser beam, and —starting (430) to record data with said second laser beam on the basis of said second position and said detected synchronization pattern.

摘要翻译： 本发明涉及一种用于通过多个激光束（A，B）在光盘上记录数据的方法和系统，所述光盘包括由（1〜51）各自由同步图案识别的段，所述多个激光 至少包括第一激光束（A）的光束，所述第一激光束（A）在所述光盘上具有用于在第一片段上记录/读取数据的第一位置和在所述光盘上具有第二位置的第二激光束（B），用于记录数据 第二段，所述方法包括以下步骤：从所述第一位置计算（410）所述第二位置和所述第一激光束与所述第二激光束之间的相对距离， - 通过所述第二激光器（420）检测（420）同步图案 基于所述第二位置和所述检测到的同步模式，射束和开始（430）以与所述第二激光束记录数据。

公开(公告)号：US20080239892A1

公开(公告)日：2008-10-02

申请号：US12090371

申请日：2006-10-12

申请人： Dayu Chen ,  Henk Goossens

发明人： Dayu Chen ,  Henk Goossens

IPC分类号： G11B7/00 ,  G11B7/0045

CPC分类号： G11B7/14 ,  G11B7/00456

摘要： The invention relates to a system and method of recording data on an optical disc by a plurality of laser beams positioned along inner tracks to outer tracks of said optical disc, said optical disc comprising segments each being identified by a start of segment, said method comprising the steps of: switching writing on (710) successively each laser beam at different starts of segments for recording data, switching writing off (720) successively each laser beam arriving at the start of a segment previously recorded by another laser beam, detecting (730) when only one laser beam remains writing on, detecting (740) a subsequent start of a segment accessed by said one laser beam, switching writing off (750) said one laser beam, shifting (760) all the laser beams so that the innermost laser beam gets positioned at said subsequent start.

摘要翻译： 本发明涉及一种通过沿着内轨道定位在所述光盘的外轨道上的多个激光束在光盘上记录数据的系统和方法，所述光盘包括每一段由段的起点标识，所述方法包括 以下步骤：在用于记录数据的片段的不同开始处，连续切换写入（710）各个激光束，切换（720）连续地每个激光束到达先前由另一激光束记录的片段的开始处的每个激光束，检测（730 ）当只有一个激光束保持写入时，检测（740）由所述一个激光束访问的片段的后续开始，切换（750）所述一个激光束，使所有激光束移动（760），使得最内侧 激光束定位在所述后续开始。

公开(公告)号：US20110282609A1

公开(公告)日：2011-11-17

申请号：US13142395

申请日：2009-12-11

申请人： Hui Liu ,  Dayu Chen

发明人： Hui Liu ,  Dayu Chen

IPC分类号： G06F19/00

CPC分类号： A61B5/05 ,  A61B5/0522 ,  A61B5/721

摘要： This invention relates to a method and apparatus for estimating artifacts in the image reconstruction of an object of interest (101). The inventive apparatus comprises a coil arrangement (105) comprising at least one transmitting coil (109, 109′) for generating a primary magnetic field to be applied to the object of interest (101), and at least one measurement coil (110, 110′) for measuring electrical signals induced by a secondary magnetic field, the secondary magnetic field being generated by the object of interest in response to the primary magnetic field; motion sensing means (112, 114, 112′, 114; 312, 314, 312′, 314′) for sensing a relative motion between the object of interest (101) and the coil arrangement (105) and generating a trigger signal when the relative motion occurs; and a processor (125) for calculating, in response to the trigger signal, a change of the conductivity distribution of the object of interest, based on the electrical signals measured before and after the relative motion, the change of the conductivity distribution representing artifacts caused by the relative motion.

摘要翻译： 本发明涉及一种用于估计感兴趣对象的图像重建中的伪影的方法和装置（101）。 本发明的装置包括线圈装置（105），该线圈装置（105）包括用于产生要施加到感兴趣物体（101）的一次磁场的至少一个发射线圈（109,109'），以及至少一个测量线圈 '），用于测量由次级磁场引起的电信号，所述次级磁场由所述感兴趣的对象响应于所述主磁场产生; 运动感测装置（112,114,112'，114; 312,314,312'，314'），用于感测感兴趣对象（101）和线圈装置（105）之间的相对运动，并且当 发生相对运动; 以及处理器（125），用于响应于所述触发信号，基于在所述相对运动之前和之后测量的电信号来计算所述感兴趣物体的电导率分布的变化，所述电导率分布的变化表示造成的伪像 通过相对运动。

公开(公告)号：US20110172512A1

公开(公告)日：2011-07-14

申请号：US13063033

申请日：2009-09-02

申请人： Ming Yan ,  Dayu Chen ,  Hua Jin

发明人： Ming Yan ,  Dayu Chen ,  Hua Jin

IPC分类号： A61B5/05

CPC分类号： G01V3/104 ,  A61B5/0522 ,  A61B5/0536

摘要： The invention relates to a method and a system for magnetic induction tomography, the system comprising: at least one transmitting coil for generating a primary magnetic field to be applied to the object of interest; and at least one measurement coil arrangement for measuring electric signals induced by a secondary magnetic field which is generated by the object of interest in response to the primary magnetic field, wherein the at least one measurement coil arrangement comprises a plurality of measurement coils which are positioned in substantially the same plane. By using a plurality of independent measurement coils positioned in a plane so as to replace a conventional single measurement coil, the measurement coil across which the measured difference voltage is most sensitive to a change of the secondary magnetic field can be selected for calculating the change of conductivity distribution, resulting in an improved sensitivity of a MIT system.

摘要翻译： 本发明涉及一种用于磁感应断层摄影的方法和系统，该系统包括：至少一个发射线圈，用于产生要施加到感兴趣对象的主磁场; 以及至少一个测量线圈装置，用于测量由响应于所述主磁场的感兴趣物体产生的次级磁场感应的电信号，其中所述至少一个测量线圈装置包括多个测量线圈，所述测量线圈定位 在大致相同的平面内。 通过使用位于平面中的多个独立的测量线圈来代替常规的单个测量线圈，可以选择测量的差分电压对次级磁场的变化最敏感的测量线圈，用于计算 电导率分布，导致MIT系统的灵敏度提高。

公开(公告)号：US20100286501A1

公开(公告)日：2010-11-11

申请号：US12678315

申请日：2008-09-16

申请人： Dayu Chen ,  Jonathan Paul Schultz ,  Ming Yan

发明人： Dayu Chen ,  Jonathan Paul Schultz ,  Ming Yan

IPC分类号： A61B5/05 ,  A61B8/00

CPC分类号： A61B5/107 ,  A61B5/0522 ,  A61B5/055 ,  A61B5/6843 ,  A61B5/6892 ,  G01B11/00 ,  G01F17/00

摘要： The invention relates to a method and apparatus for monitoring an object of interest (100). According to the invention, a cushion (104) is inflated such that the inflated cushion extends inwards to envelop the object of interest (100), whereupon the pressure exerted on the object of interest (1600) by the inflated cushion (104) is measured and a signal is output to stop inflating when the pressure reaches a predefined threshold. After that, the volume of the inflated cushion is measured and the size of the object of interest (100) is derived from the volume of the inflated cushion (104). In this way, the invention can keep the object of interest still during monitoring. Furthermore, the size of the object of interest can be used for imaging reconstruction to improve the quality of reconstructed images.

摘要翻译： 本发明涉及一种用于监视感兴趣对象（100）的方法和装置。 根据本发明，充气垫（104）使得充气的垫子向内延伸以包围感兴趣的物体（100），由此测量由膨胀的垫（104）施加在感兴趣物体（1600）上的压力 并且当压力达到预定阈值时输出信号以停止充气。 之后，测量充气垫的体积，并且感兴趣物体（100）的尺寸来源于充气垫（104）的体积。 这样，本发明可以在监视期间保持感兴趣的对象。 此外，感兴趣对象的尺寸可以用于成像重建以提高重建图像的质量。