公开(公告)号：US08089037B2

公开(公告)日：2012-01-03

申请号：US12561204

申请日：2009-09-16

申请人： Matthias J. Schmand ,  Dongming Hu ,  Ziad Burbar

发明人： Matthias J. Schmand ,  Dongming Hu ,  Ziad Burbar

IPC分类号： H01L27/00

CPC分类号： G01T1/1648

摘要： A method, process and apparatus for compensating for changes to the gain of photo detectors in a nuclear imaging apparatus is disclosed. Specifically, embodiments detect positron annihilation event pulses using photo detectors. Changes to the gain of the photo detectors are compensated for by determining the relationship of a detected event pulse peak with a target event pulse peak. Based on the difference between these two peaks, a corrected gain is determined in a closed-loop control system. The corrected gain can be used to compensate for temperature changes that can affect the gain of the photo detectors.

摘要翻译： 公开了一种用于补偿核成像装置中光检测器的增益变化的方法，过程和装置。 具体地，实施例使用光电检测器检测正电子湮灭事件脉冲。 通过确定检测到的事件脉冲峰值与目标事件脉冲峰值的关系来补偿光电检测器增益的变化。 基于这两个峰之间的差异，在闭环控制系统中确定校正增益。 校正的增益可用于补偿可影响光电检测器增益的温度变化。

公开(公告)号：US20100065723A1

公开(公告)日：2010-03-18

申请号：US12561204

申请日：2009-09-16

申请人： Ziad Burbar ,  Dongming Hu ,  Matthias J. Schmand

发明人： Ziad Burbar ,  Dongming Hu ,  Matthias J. Schmand

IPC分类号： H03G3/20

CPC分类号： G01T1/1648

摘要： A method, process and apparatus for compensating for changes to the gain of photo detectors in a nuclear imaging apparatus is disclosed. Specifically, embodiments detect positron annihilation event pulses using photo detectors. Changes to the gain of the photo detectors are compensated for by determining the relationship of a detected event pulse peak with a target event pulse peak. Based on the difference between these two peaks, a corrected gain is determined in a closed-loop control system. The corrected gain can be used to compensate for temperature changes that can affect the gain of the photo detectors.

摘要翻译： 公开了一种用于补偿核成像装置中光检测器的增益变化的方法，过程和装置。 具体地，实施例使用光电检测器检测正电子湮灭事件脉冲。 通过确定检测到的事件脉冲峰值与目标事件脉冲峰值的关系来补偿光电检测器增益的变化。 基于这两个峰之间的差异，在闭环控制系统中确定校正增益。 校正的增益可用于补偿可影响光电检测器增益的温度变化。

公开(公告)号：US20110272587A1

公开(公告)日：2011-11-10

申请号：US13101367

申请日：2011-05-05

申请人： Stefan B. Siegel ,  Dongming Hu

发明人： Stefan B. Siegel ,  Dongming Hu

IPC分类号： G01T1/20 ,  G01T1/164

CPC分类号： G01T1/1644 ,  A61B6/037 ,  G01T1/2985

摘要： An apparatus and method to increase the sensitivity at the edge of radiation detector blocks is disclosed herein. Reduced sensitivity can result from photons entering a first detector block, escaping, and scattering into an adjacent detector, thereby depositing energy into two detectors blocks. Energy lost into adjacent detector blocks can be compensated with energy detected in the adjacent detector block. This can be done, for example, by processing channels from multiple detector blocks with one Field Programmable Gated Array (FPGA) on one Event Process Module (EPM) board. This can enable summing energy of one detector block with energy from an adjacent detector block when the initial interaction occurs at the edge of the first detector block. This can result in a better estimate of the amount of energy associated with the initial photon being detected.

摘要翻译： 本文公开了增加辐射检测器块边缘处的灵敏度的装置和方法。 光子的灵敏度降低可能会由光子进入第一个检测器块，逃逸和散射到相邻的检测器中，从而将能量沉积到两个检测器块中。 能够通过在相邻检测器块中检测到的能量来补偿相邻检测器块中的能量损失。 这可以通过例如在一个事件处理模块（EPM）板上用一个现场可编程门阵列（FPGA）处理来自多个检测器块的通道来实现。 当初始相互作用发生在第一检测器块的边缘时，这可以使来自相邻检测器块的能量与一个检测器块的能量相加。 这可以导致与正在检测的初始光子相关联的能量的更好的估计。

公开(公告)号：US20090094180A1

公开(公告)日：2009-04-09

申请号：US12245802

申请日：2008-10-06

申请人： Dongming Hu

发明人： Dongming Hu

IPC分类号： G06N3/08

CPC分类号： G06N3/08

摘要： The present invention provides a method of real-time crystal peak tracking for avalanche-photodiode (APD) detectors on positron emission tomography (PET) scanners that satisfies the need to compensate for the significant gain drifting due to thermal variations in APD detectors on PET scanners.

摘要翻译： 本发明提供了一种用于正电子发射断层摄影（PET）扫描仪上的雪崩光电二极管（APD）检测器的实时晶体峰值跟踪的方法，其满足由于PET扫描仪上的APD检测器的热变化而补偿显着增益漂移的需要 。

公开(公告)号：US07827129B2

公开(公告)日：2010-11-02

申请号：US11750554

申请日：2007-05-18

申请人： Dongming Hu ,  Blake Atkins ,  Mark W. Lenox

发明人： Dongming Hu ,  Blake Atkins ,  Mark W. Lenox

IPC分类号： G06N3/08

CPC分类号： G06N3/063 ,  G06K9/00 ,  G06T7/80 ,  G06T2207/10016 ,  G06T2207/30204

摘要： A crystal lookup table used to define a matching relationship between a signal position of a detected event in a PET scanner and a corresponding detector pixel location is generated using a neural network-based algorithm, and is implemented by a FPGA.

摘要翻译： 用于定义PET扫描仪中检测到的事件的信号位置与相应检测器像素位置之间的匹配关系的晶体查找表使用基于神经网络的算法生成，并由FPGA实现。

公开(公告)号：US08117142B2

公开(公告)日：2012-02-14

申请号：US12245802

申请日：2008-10-06

申请人： Dongming Hu

发明人： Dongming Hu

IPC分类号： G06E1/00 ,  G06E3/00 ,  G06F15/18 ,  G06G7/00

CPC分类号： G06N3/08

摘要： The present invention provides a method of real-time crystal peak tracking for avalanche-photodiode (APD) detectors on positron emission tomography (PET) scanners that satisfies the need to compensate for the significant gain drifting due to thermal variations in APD detectors on PET scanners.

摘要翻译： 本发明提供了一种用于正电子发射断层摄影（PET）扫描仪上的雪崩光电二极管（APD）检测器的实时晶体峰值跟踪的方法，其满足由于PET扫描仪上的APD检测器的热变化而补偿显着增益漂移的需要 。

公开(公告)号：US20070271206A1

公开(公告)日：2007-11-22

申请号：US11750554

申请日：2007-05-18

申请人： Dongming Hu ,  Blake Atkins ,  Mark W. Lenox

发明人： Dongming Hu ,  Blake Atkins ,  Mark W. Lenox

IPC分类号： G06F15/18

CPC分类号： G06N3/063 ,  G06K9/00 ,  G06T7/80 ,  G06T2207/10016 ,  G06T2207/30204

摘要： A crystal lookup table used to define a matching relationship between a signal position of a detected event in a PET scanner and a corresponding detector pixel location is generated using a neural network-based algorithm, and is implemented by a FPGA.

摘要翻译： 用于定义PET扫描仪中检测到的事件的信号位置与相应检测器像素位置之间的匹配关系的晶体查找表使用基于神经网络的算法生成，并由FPGA实现。

公开(公告)号：US11383437B2

公开(公告)日：2022-07-12

申请号：US16591410

申请日：2019-10-02

申请人： Dongming Hu

发明人： Dongming Hu

IPC分类号： B29C64/209 ,  B29C64/245 ,  B29C64/277 ,  B29C64/30 ,  G05B19/4099 ,  B33Y30/00 ,  B29C64/118 ,  B33Y50/02

摘要： A hybrid manufacturing apparatus utilizing both additive and subtractive manufacturing processes has a cutting mechanism, a magazine, and a deposition nozzle. A cutting mechanism engages and modifies material fed from a magazine, the finished material of this process to be positioned by a deposition nozzle. More specifically, the cutting mechanism provides a chamber supporting an inlet, an outlet, and at least one cutting head. The inlet receives fresh material, the cutting head is positioned within the chamber to create the desired contours in or on the material, and the material then exits the chamber via the outlet to be deposited according to instructions extracted from a digital model in a form of numerical control (NC) programming language. This model is natively subdivided into individual constructs each defining a set of values to guide creation of corresponding physical sections, and the placement thereof.

公开(公告)号：US08450692B2

公开(公告)日：2013-05-28

申请号：US13101367

申请日：2011-05-05

申请人： Stefan B. Siegel ,  Dongming Hu

发明人： Stefan B. Siegel ,  Dongming Hu

IPC分类号： G01T1/20

CPC分类号： G01T1/1644 ,  A61B6/037 ,  G01T1/2985

摘要： An apparatus and method to increase the sensitivity at the edge of radiation detector blocks is disclosed herein. Reduced sensitivity can result from photons entering a first detector block, escaping, and scattering into an adjacent detector, thereby depositing energy into two detectors blocks. Energy lost into adjacent detector blocks can be compensated with energy detected in the adjacent detector block. This can be done, for example, by processing channels from multiple detector blocks with one Field Programmable Gated Array (FPGA) on one Event Process Module (EPM) board. This can enable summing energy of one detector block with energy from an adjacent detector block when the initial interaction occurs at the edge of the first detector block. This can result in a better estimate of the amount of energy associated with the initial photon being detected.

摘要翻译： 本文公开了增加辐射检测器块边缘处的灵敏度的装置和方法。 光子的灵敏度降低可能会由光子进入第一个检测器块，逃逸和散射到相邻的检测器中，从而将能量沉积到两个检测器块中。 能够通过在相邻检测器块中检测到的能量来补偿相邻检测器块中的能量损失。 这可以通过例如在一个事件处理模块（EPM）板上用一个现场可编程门控阵列（FPGA）处理来自多个检测器块的通道来完成。 当初始相互作用发生在第一检测器块的边缘时，这可以使来自相邻检测器块的能量与一个检测器块的能量相加。 这可以导致与正在检测的初始光子相关联的能量的更好的估计。

公开(公告)号：US06995334B1

公开(公告)日：2006-02-07

申请号：US10649927

申请日：2003-08-25

申请人： Radovan Kovacevic ,  Dongming Hu ,  Michael E. Valant

发明人： Radovan Kovacevic ,  Dongming Hu ,  Michael E. Valant

IPC分类号： B23K26/34 ,  G06F19/00

CPC分类号： B23K26/032 ,  B22F3/1055 ,  B22F2003/1057 ,  B23K26/034 ,  B23K26/32 ,  B23K26/342 ,  B23K35/0244 ,  B23K2103/50 ,  B29C64/153 ,  B33Y30/00 ,  B33Y40/00 ,  B33Y50/02 ,  Y02P10/295

摘要： According to one embodiment of the invention, a method for controlling the size of the molten pool in a laser based additive manufacturing process includes coaxially aligning an imaging device with a laser nozzle and imaging a molten pool, created by a laser, on a substrate with the imaging device. The method further includes comparing at least one characteristic of the molten pool with a respective characteristic of a target molten pool, and adjusting, in substantially real-time, a laser power of the laser based on the comparison in order to correlate the characteristic of the molten pool with the respective characteristic of the target molten pool.

摘要翻译： 根据本发明的一个实施例，一种用于在基于激光的添加剂制造工艺中控制熔池尺寸的方法包括将成像装置与激光喷嘴同轴对准并将由激光产生的熔池成像在具有 成像装置。 该方法还包括将熔池的至少一个特征与目标熔池的相应特征进行比较，并且基于比较来基本上实时地调整激光器的激光功率，以便将所述熔池的特性相关联 熔池具有目标熔池的特征。