公开(公告)号：US20100110515A1

公开(公告)日：2010-05-06

申请号：US12529857

申请日：2008-03-07

申请人： Sébastien Blais-Ouellette ,  Daniel Gagnon ,  Jean-François Moquin ,  Marc Verhaegen

发明人： Sébastien Blais-Ouellette ,  Daniel Gagnon ,  Jean-François Moquin ,  Marc Verhaegen

IPC分类号： G02B5/32

CPC分类号： G02B5/32 ,  G02B5/203 ,  G03H1/0005 ,  G03H1/0248 ,  G03H2001/261

摘要： A notch filter system, where multiple filter passes of a light signal may be effected for removing a target spectral component from the light signal, is provided. Advantageously, the notch filter system may be tunable. A cascade notch filter system is provided which includes multiple notch filters arranged in a cascade, each of the filters having spectral filtering characteristics and being disposed in the path of the light signal at an appropriate filter angle so that the target spectral component is filtered out of the light signal as the light signal passes therethrough. A multipass notch filter system is provided which includes a notch filter having spectral filtering characteristics, and an optical assembly for directing the light signal for multiple filter passes through the filter at an appropriate angle, so that the target spectral component is filtered out of the light signal as the light signal passes through the filter.

摘要翻译： 提供了一种陷波滤波器系统，其中可以实现光信号的多个滤波器通过以从光信号中去除目标光谱分量。 有利地，陷波滤波器系统可以是可调谐的。 提供了一种级联陷波滤波器系统，其包括以级联方式布置的多个陷波滤波器，每个滤波器具有频谱滤波特性，并以适当的滤波器角度设置在光信号的路径中，使得目标频谱分量被滤出 作为光信号的光信号通过。 提供了一种多通道陷波滤波器系统，其包括具有频谱滤波特性的陷波滤波器，以及用于引导多个滤波器的光信号以适当角度通过滤波器的光学组件，使得目标谱分量被滤出光 信号通过滤光片。

公开(公告)号：US20100016715A1

公开(公告)日：2010-01-21

申请号：US11912678

申请日：2006-04-10

申请人： Daniel Gagnon ,  Henning Braess

发明人： Daniel Gagnon ,  Henning Braess

IPC分类号： A61B6/00

CPC分类号： A61B6/541 ,  A61B5/02755 ,  A61B5/7289 ,  A61B6/037 ,  A61B6/5288 ,  A61B8/5276 ,  A61B8/543

摘要： In a diagnostic imaging system (10), a monitor (50) monitors periodic biological cycles of the subject (14). A trigger point detector (60) detects a time (t1, t2, . . . ,tn) of a common, reoccurring reference point (R1, R2, . . . ,Rn) in each periodic cycle of the subject (14). A sequence selector (62) selects a sequence (64) of nominal sampling segments (Si, S2, . . . ,Sn). An adjustor (70) adjusts duration of each nominal sampling segment (Si, S2, . . . ,Sn) to coincide with the times of detected reference points (R1, R2, . . . ,Rn). A scaling processor (72) scales each adjusted segment based on a difference in duration between the corresponding nominal (Si, S2, . . . Sn) and adjusted sampling segments (S′i, S′2, . . . ,S′n).

摘要翻译： 在诊断成像系统（10）中，监视器（50）监视对象（14）的周期性生物学周期。 触发点检测器（60）检测对象（14）的每个周期循环中的共同的重现的参考点（R1，R2，...，Rn）的时间（t1，t2，...，tn）。 序列选择器（62）选择标称采样段（Si，S2，...，Sn）的序列（64）。 调整器（70）调整每个标称采样段（Si，S2，...，Sn）的持续时间，以与检测到的参考点（R1，R2，...，Rn）的时间一致。 缩放处理器（72）基于相应的标称（Si，S2，... Sn）和调整的采样段（S'i，S'2，...，S'n）之间的持续时间差来缩放每个经调整的段 ）。

公开(公告)号：US07402815B2

公开(公告)日：2008-07-22

申请号：US10595433

申请日：2004-10-06

申请人： Daniel Gagnon ,  Jerome J. Griesmer

发明人： Daniel Gagnon ,  Jerome J. Griesmer

IPC分类号： G01T1/24

CPC分类号： G01T1/249 ,  G01T1/24

摘要： A system reverses degraded energy resolution of semiconductor radiation detection elements (44) which are used in a radiation detector assembly. A means (38) identifies semiconductor elements which exhibit degraded energy resolution as compared to an initial level of energy resolution after application of the forward bias. A means (40) restores the degraded semiconductor elements to the initial level of energy resolution by applying the reverse bias. A heater (74) accelerates the restoration process by supplying an elevated ambient temperature. A screening means (48) screens new semiconductor elements to identify the elements which are susceptible to degradation. A forward bias is applied by a forward bias means (50) to induce the degradation. A heater (52) increases an ambient temperature to accelerate the performance degradation in the new semiconductor elements. The identified degradable elements are treated with a reverse bias prior to installation in the detector.

摘要翻译： 系统反转在辐射检测器组件中使用的半导体辐射检测元件（44）的降解的能量分辨率。 一种装置（38）识别与应用正向偏压之后的能量分辨率的初始水平相比表现出降低的能量分辨率的半导体元件。 A装置（40）通过施加反向偏压将劣化的半导体元件恢复到初始的能量分辨率水平。 加热器（74）通过提供升高的环境温度来加速恢复过程。 屏蔽装置（48）屏蔽新的半导体元件以识别易于退化的元件。 正向偏压由正向偏压装置（50）施加以引起劣化。 加热器（52）增加环境温度以加速新半导体元件的性能下降。 在安装在检测器中之前，用反向偏压处理所识别的可降解元件。

公开(公告)号：US20070003355A1

公开(公告)日：2007-01-04

申请号：US11171626

申请日：2005-06-30

申请人： William Connors ,  Walter Cousins ,  Daniel Gagnon ,  Kris Kallenberger ,  Kevin Maudsley

发明人： William Connors ,  Walter Cousins ,  Daniel Gagnon ,  Kris Kallenberger ,  Kevin Maudsley

IPC分类号： B41J13/10 ,  B65H1/04

CPC分类号： B41J13/103 ,  B65H1/025 ,  B65H2402/60 ,  B65H2404/742 ,  B65H2405/111646 ,  B65H2405/114 ,  B65H2511/12 ,  B65H2511/22 ,  B65H2220/01 ,  B65H2220/04 ,  B65H2220/11

摘要： A media edge guide assembly for use in an imaging apparatus having a media supply source includes a first edge guide portion and a second edge guide portion. The first edge guide portion and the second edge guide portion are arranged to have an axis of rotation passing through the first edge guide portion and the second edge guide portion. The first edge guide portion and the second edge guide portion are laterally interconnected to facilitate movement as a unit in a lateral direction along the axis of rotation, and the first edge guide portion and the second edge guide portion are configured to be rotationally disconnected with respect to the axis of rotation to permit the first edge guide portion to rotate around the axis of rotation independent of the second edge guide portion.

摘要翻译： 用于具有介质供应源的成像设备的介质边缘引导组件包括第一边缘引导部分和第二边缘引导部分。 第一边缘引导部分和第二边缘引导部分被布置成具有穿过第一边缘引导部分和第二边缘引导部分的旋转轴线。 第一边缘引导部分和第二边缘引导部分横向互连以便于沿着旋转轴线沿横向方向作为单元移动，并且第一边缘引导部分和第二边缘引导部分被构造成相对于 以允许第一边缘引导部分围绕独立于第二边缘引导部分的旋转轴线旋转。

公开(公告)号：US06593576B2

公开(公告)日：2003-07-15

申请号：US09809467

申请日：2001-03-15

申请人： Gengsheng Lawrence Zeng ,  Daniel Gagnon

发明人： Gengsheng Lawrence Zeng ,  Daniel Gagnon

IPC分类号： G01T1166

CPC分类号： G01T1/1644 ,  A61B6/037

摘要： A subject (10) is disposed adjacent a linear detector array (18) of a nuclear camera. The subject (10) is injected with a radioactive isotope (14) and y-ray emissions indicative of nuclear decay are detected at the detector array (18) as the detector array rotates about an axis of rotation to collect data over a circular field of view. Detectors farther from the axis rotation are sampled at a higher sampling rate such that the are sampled after a generally constant arc of rotation to correct for angular aliasing. The detector array (18) rotates about the axis of rotation in a 1/sin &THgr; pattern with angular offset of the detector array from a longitudinal axis of the subject. This corrects for otherwise uneven sampling. A reconstruction processor (84) reconstructs the identifications of the y-ray receiving detectors, or other indicators of event detection location, and the digital peak values to generate a spherical image representation.

摘要翻译： 被摄体（10）设置在核相机的线性检测器阵列（18）附近。 被检体（10）注入放射性同位素（14），并且当检测器阵列围绕旋转轴旋转时，在检测器阵列（18）处检测到表示核衰变的y射线发射，以在圆周的圆周上收集数据 视图。 以更高的采样速率对离轴旋转更远的探测器进行采样，以便在大体上恒定的旋转弧线之后对其进行采样，以校正角度混叠。 检测器阵列（18）以1 / sin THETA图案的旋转轴线旋转，其中检测器阵列的角度偏移与被检体的纵轴成角度偏移。 这取决于不均匀采样。 重建处理器（84）重建y射线接收检测器或事件检测位置的其他指示符的标识，以及数字峰值以产生球形图像表示。

公开(公告)号：US06553248B1

公开(公告)日：2003-04-22

申请号：US09437783

申请日：1999-11-09

申请人： Daniel Gagnon ,  Jerome W. Brack

发明人： Daniel Gagnon ,  Jerome W. Brack

IPC分类号： A61B505

CPC分类号： G01T1/1647

摘要： A method for reconstructing an image representation of a subject from data sets collected using a medical diagnostic imaging apparatus is provided. The method includes defining operations which are performed in reconstructing desired types of image representations. The operations are applicable to data sets having particular formats. Data sets having particular formats are identified, and operations are selected from the defined operations based upon the particular format of the identified data sets. When a detected load on available image processing equipment is below a desired level, then selected operations are automatically performed on the identified data sets.

摘要翻译： 提供了一种用于使用医学诊断成像装置收集的数据集重建对象的图像表示的方法。 该方法包括定义在重建期望类型的图像表示中执行的操作。 这些操作适用于具有特定格式的数据集。 识别具有特定格式的数据集，并且基于所识别的数据集的特定格式从定义的操作中选择操作。 当检测到的可用图像处理设备的负载低于期望的水平时，对所识别的数据集进行自动执行所选择的操作。

公开(公告)号：US06339652B1

公开(公告)日：2002-01-15

申请号：US09437784

申请日：1999-11-10

申请人： William G. Hawkins ,  Daniel Gagnon

发明人： William G. Hawkins ,  Daniel Gagnon

IPC分类号： G06K900

CPC分类号： G01T1/1615 ,  A61B6/037 ,  G01T1/2985

摘要： A method of ML-EM image reconstruction is provided for use in connection with a diagnostic imaging apparatus (10) that generates projection data. The method includes collecting projection data, including measured emission projection data and measured transmission projection data. Optionally, the measured transmission projection data is truncated. An initial emission map and attenuation map are assumed. The emission map and the attenuation map are iteratively updated. With each iteration, the emission map is recalculated by taking a previous emission map and adjusting it based upon: (i) the measured emission projection data; (ii) a reprojection of the previous emission map which is carried out with a multi-dimensional projection model; and, (iii) a reprojection of the attenuation map. As well, with each iteration, the attenuation map is recalculated by taking a previous attenuation map and adjusting it based upon: (i) the measured emission projection data; (ii) a reprojection of the previous emission map which is carried out with the multi-dimensional projection model; and (iii) measured transmission projection data.

摘要翻译： 提供了一种ML-EM图像重建方法，用于与产生投影数据的诊断成像设备（10）相结合。 该方法包括收集投影数据，包括测量的发射投影数据和测量的透射投影数据。 可选地，所测量的传输投影数据被截断。 假设初始发射图和衰减图。 发射图和衰减图迭代更新。 通过每次迭代，通过采取先前的发射图并根据以下进行调整来重新计算发射图：（i）测量的发射投影数据; （ii）用多维投影模型进行的先前发射图的重新投影; 和（iii）衰减图的重新投射。 同样地，通过每次迭代，通过采取先前的衰减图并且基于以下来调整衰减图来重新计算衰减图：（i）测量的发射投影数据; （ii）用多维投影模型进行的先前发射图的重新投影; 和（iii）测量的传输投影数据。

公开(公告)号：US5813983A

公开(公告)日：1998-09-29

申请号：US867737

申请日：1997-06-03

申请人： Frank P. DiFilippo ,  Daniel Gagnon

发明人： Frank P. DiFilippo ,  Daniel Gagnon

IPC分类号： G01T1/161 ,  G01T1/164 ,  A61B6/00

CPC分类号： G01T1/1642 ,  A61B6/037

摘要： Radiation from a subject (18) which is received by a scintillation crystal (12) interacts with the scintillation crystal to produce a burst of scintillation light photons. The depth distribution at which the interaction occurs varies in accordance with the energy of the received radiation. Low-energy radiation tends to interact at a shallow depth relative to a front face of the scintillation crystal and radiation with a high energy tends to interact relatively deeply into the crystal. A moment processor (20) processes electronic information from photomultiplier tubes (14) which view the scintillation crystal to generate zero-th moment or energy information, first moment or coordinate information and second moment or depth information. The event information is filtered (34, 62, 66, 82) in accordance with depth (26), e.g., sorted into acceptable/unacceptable information, information corresponding to each of two or more energies of radiation, and the like.

摘要翻译： 由闪烁晶体（12）接收的来自被摄体（18）的辐射与闪烁晶体相互作用，以产生闪烁光子弹。 相互作用发生的深度分布根据所接收的辐射的能量而变化。 低能辐射倾向于在相对于闪烁晶体的前面的浅深度处相互作用，并且具有高能量的辐射倾向于相对较深地与晶体相互作用。 时刻处理器（20）处理来自光电倍增管（14）的电子信息，该光电倍增管观察闪烁晶体以产生第零时刻或能量信息，第一时刻或坐标信息以及第二时刻或深度信息。 事件信息根据深度（26）被过滤（34,62,66,82），例如分类为可接受/不可接受的信息，对应于两个或更多个辐射能量的信息等。

公开(公告)号：US10413267B2

公开(公告)日：2019-09-17

申请号：US15584726

申请日：2017-05-02

申请人： Daniel Gagnon

发明人： Daniel Gagnon

IPC分类号： A61B6/00 ,  A61B6/02 ,  A61B6/03 ,  A61B6/10 ,  A61B5/055 ,  G01T1/161 ,  G01N23/046

摘要： A PET/CT imaging system is provided. The imaging system includes a PET detection system having a plurality of detector rings and an axial gap between at least two adjacent detector rings within the plurality of detector rings. The imaging system includes a CT system having an x-ray generator and a CT detection system positioned within the axial gap between the at least two detector rings. The system is configured to collect PET data and CT data on the same volume of interest substantially simultaneously.

公开(公告)号：US09445778B2

公开(公告)日：2016-09-20

申请号：US11912678

申请日：2006-04-10

申请人： Daniel Gagnon ,  Henning Braess

发明人： Daniel Gagnon ,  Henning Braess

IPC分类号： A61B6/00 ,  A61B6/03 ,  A61B8/08 ,  A61B5/0275 ,  A61B5/00 ,  A61B8/00

CPC分类号： A61B6/541 ,  A61B5/02755 ,  A61B5/7289 ,  A61B6/037 ,  A61B6/5288 ,  A61B8/5276 ,  A61B8/543

摘要： In a diagnostic imaging system (10), a monitor (50) monitors periodic biological cycles of the subject (14). A trigger point detector (60) detects a time (t1, t2, . . . , tn) of a common, reoccurring reference point (R1, R2, . . . , Rn) in each periodic cycle of the subject (14). A sequence selector (62) selects a sequence (64) of nominal sampling segments (Si, S2, . . . , Sn). An adjustor (70) adjusts duration of each nominal sampling segment (Si, S2, . . . , Sn) to coincide with the times of detected reference points (R1, R2, . . . , Rn). A scaling processor (72) scales each adjusted segment based on a difference in duration between the corresponding nominal (Si, S2, . . . , Sn) and adjusted sampling segments (S′i, S′2, . . . , S′n).

摘要翻译： 在诊断成像系统（10）中，监视器（50）监视对象（14）的周期性生物学周期。 触发点检测器（60）检测对象（14）的每个周期循环中的共同的重现的参考点（R1，R2，...，Rn）的时间（t1，t2，...，tn）。 序列选择器（62）选择标称采样段（Si，S2，...，Sn）的序列（64）。 调整器（70）调整每个标称采样段（Si，S2，...，Sn）的持续时间，以与检测到的参考点（R1，R2，...，Rn）的时间一致。 缩放处理器（72）基于相应的标称（Si，S2，...，Sn）和调整的采样段（S'i，S'2，...，S'）之间的持续时间差来缩放每个经调整的段， n）。