公开(公告)号：US20060103067A1

公开(公告)日：2006-05-18

申请号：US10955250

申请日：2004-09-29

申请人： William Connors ,  Daniel Gagnon ,  James Jackson

发明人： William Connors ,  Daniel Gagnon ,  James Jackson

IPC分类号： B65H3/52

CPC分类号： B65H3/0661

摘要： An imaging apparatus includes a sheet picking mechanism drive unit that includes a sheet pick gear train for driving a sheet picking mechanism to transport a sheet from a stack of print media along the sheet feed path. A print media dam is pivotably coupled at an axis to the imaging apparatus. The print media dam has at least one dam member and a first gear. Each dam member has a media engaging surface. A drive mechanism is drivably coupled between the sheet picking drive mechanism and the first gear to move the dam member between an extended position and a retracted position. When the dam member is in the extended position, the media engaging surface is positioned to interrupt the sheet feed path. When the dam member is in the retracted position, the media engaging surface is positioned to not interrupt the sheet feed path.

摘要翻译： 成像装置包括片材拾取机构驱动单元，该片材拾取机构驱动单元包括用于驱动片材拾取机构的片材拾取齿轮系，以沿着片材进给路径从一堆打印介质输送片材。 打印介质坝在轴线处可枢转地耦合到成像装置。 印刷媒体坝具有至少一个坝构件和第一档。 每个阻挡构件具有介质接合表面。 驱动机构可驱动地联接在片材拾取驱动机构和第一齿轮之间，以在延伸位置和缩回位置之间移动阻挡构件。 当阻挡构件处于延伸位置时，介质接合表面被定位成中断供纸路径。 当阻挡构件处于缩回位置时，介质接合表面被定位成不中断供纸路径。

公开(公告)号：US06922506B2

公开(公告)日：2005-07-26

申请号：US10720322

申请日：2003-11-25

申请人： Daniel Gagnon

发明人： Daniel Gagnon

IPC分类号： G02B6/02 ,  G02B6/34

CPC分类号： G02B6/0218

摘要： A packaging structure for supporting a segment of optical fiber provided with a wavelength filter optically coupled thereto. The wavelength filter defines a temperature dependent center wavelength and a rate of wavelength drift per temperature change. The optical fiber is attachable about a fiber fast first attachment point and a fiber second attachment point to a housing having a generally hollow housing body for protecting the wavelength filter. The structure allows for both adjustment of the center wavelength and also for adjustment of the rate of wavelength drift per temperature change independently from the adjustment of the center wavelength. The wavelength excursion is typically adjusted by adjusting the spacing between the fiber first and second adjustment points. The center wavelength is typically independently adjusted by adjusting the tension imparted on the wavelength filter when the fiber is attached to the housing.

摘要翻译： 一种用于支撑设置有与其光耦合的波长滤光器的光纤段的封装结构。 波长滤波器定义了与温度相关的中心波长和每个温度变化的波长漂移速率。 光纤可以围绕光纤快速第一连接点和光纤第二附接点附接到具有用于保护波长滤波器的大体上中空的壳体的壳体。 该结构允许调整中心波长，并且还可以独立于中心波长的调节来调节每个温度变化的波长漂移速率。 波长偏移通常通过调整光纤第一和第二调整点之间的间距来调节。 中心波长通常通过调节纤维附着在外壳上时施加在波长滤波器上的张力来独立调节。

公开(公告)号：US06694172B1

公开(公告)日：2004-02-17

申请号：US09943912

申请日：2001-08-31

申请人： Daniel Gagnon ,  Jerome J. Griesmer

发明人： Daniel Gagnon ,  Jerome J. Griesmer

IPC分类号： A61B600

CPC分类号： G01T1/2928 ,  A61B6/037 ,  A61B6/4258

摘要： A nuclear imaging apparatus includes a radiation detector comprising an array (18) of solid state detector elements (22) responsive to incident gamma radiation by emitting a current spike. A pixel correction processor (44) detects defective detector elements in the array and a flood correction circuit (66) corrects detected radiation events (70) based on sensitivity differences between a plurality of groupings of detector elements in the array. A reconstruction processor (76) reconstructs an image representation from the corrected radiation events (74).

摘要翻译： 核成像设备包括辐射检测器，其包括通过发射电流尖峰来响应入射伽马辐射的固态检测器元件（22）的阵列（18）。 像素校正处理器（44）检测阵列中的故障检测器元件，并且洪泛校正电路（66）基于阵列中的多个检测器元件组之间的灵敏度差来校正检测到的辐射事件（70）。 重建处理器（76）从校正的辐射事件（74）重构图像表示。

公开(公告)号：US06589429B2

公开(公告)日：2003-07-08

申请号：US09949619

申请日：2001-09-12

申请人： Henri-Claude Lavallee ,  Daniel Gagnon ,  Sylvain Robert

发明人： Henri-Claude Lavallee ,  Daniel Gagnon ,  Sylvain Robert

IPC分类号： C02F100

CPC分类号： C02F1/008 ,  C02F1/5263 ,  C02F1/56 ,  C02F2103/28 ,  C02F2209/02 ,  C02F2209/06

摘要： A method of treating industrial wastewater using casein includes an optimization step whereby treatment operating variable are optimized through statistical methods on experimental designs.

公开(公告)号：US06455856B1

公开(公告)日：2002-09-24

申请号：US09585957

申请日：2000-06-02

申请人： Daniel Gagnon

发明人： Daniel Gagnon

IPC分类号： G01T1164

CPC分类号： G01T1/1644 ,  A61B6/037 ,  A61B6/4258

摘要： A gamma camera includes first and second detectors. The first detector is located beneath a patient receiving surface. The second detector is located above the patient receiving surface. The second detector is movable between operating and retracted positions. The second detector includes a plurality of discrete detector portions, each detector portion having a first radiation sensitive face which faces an examination region and a second radiation sensitive face. The patient receiving surface generates signals indicative of pressure applied to the patient receiving surface. A movable transmission radiation source provides transmission radiation, interactions between the transmission radiation and the second detector generating Compton scattered radiation at least a portion of which is received by the first detector, coincident radiation being used to generate a transmission attenuation map. The gamma camera also includes an ultrasound device.

摘要翻译： 伽马照相机包括第一和第二检测器。 第一检测器位于患者接收表面下方。 第二检测器位于患者接收表面上方。 第二检测器可在操作和缩回位置之间移动。 第二检测器包括多个离散检测器部分，每个检测器部分具有面向检查区域和第二辐射敏感面的第一辐射敏感面。 患者接收表面产生指示施加到患者接收表面的压力的信号。 可移动传输辐射源提供传输辐射，传输辐射和第二检测器之间的相互作用产生康普顿散射辐射，其至少一部分由第一检测器接收，用于产生传输衰减图的重合辐射。 伽马照相机还包括超声装置。

公开(公告)号：US06429433B1

公开(公告)日：2002-08-06

申请号：US09522737

申请日：2000-03-10

申请人： Daniel Gagnon ,  Chi-Hua Tung

发明人： Daniel Gagnon ,  Chi-Hua Tung

IPC分类号： G01T1166

CPC分类号： G01T1/1648

摘要： A continuous rotation sampling scheme for use with a nuclear medicine gamma camera facilitates collection of transmission and emission data leading to a reduced overall scan time. The gantry (16) contains a plurality of radiation detector heads (20a-20c) with planar faces and at least one adjustably mounted radiation source (30a). During transmission data collection, the gantry (16) continuously rotates about a subject receiving aperture (18) while the radiation source (30a) continuously rasters back and forth across the field of view. The detected transmission radiation (32a) is reconstructed into an attenuation volumetric image representation by a transmission reconstruction processor (64t). The transmission reconstruction processor (64t) performs a fan beam reconstruction algorithm in each of a multiplicity of planes perpendicular to an axis of rotation. An angular displacement versus radiation source motion index is calculated in order to update the transmission reconstruction for a sampled data line of transmission radiation. Such continuous rotation during transmission data acquisition reduces overall scan time by eliminating the dead time during which the gantry rotates and comes to rest at incremental angular orientations.

摘要翻译： 与核医学伽马照相机一起使用的连续旋转采样方案便于收集传输和发射数据，从而减少总扫描时间。 台架（16）包含多个具有平面的辐射探测器头（20a-20c）和至少一个可调节安装的辐射源（30a）。 在传输数据收集过程中，台架（16）围绕被摄体接收孔径（18）连续地旋转，同时辐射源（30a）在视野范围内来回连续地着镜。 通过传输重建处理器（64t）将检测到的传输辐射（32a）重建成衰减体积图像表示。 传输重建处理器（64t）在垂直于旋转轴的多个平面中的每一个中执行扇形波束重建算法。 计算角位移对辐射源运动指数，以更新传输辐射的采样数据线的传输重建。 在传输数据采集期间的这种连续旋转通过消除台架旋转的停滞时间并以增量的角度取向静止来减少总体扫描时间。

公开(公告)号：US06359279B1

公开(公告)日：2002-03-19

申请号：US09206508

申请日：1998-12-07

申请人： Daniel Gagnon ,  Christopher G. Matthews

发明人： Daniel Gagnon ,  Christopher G. Matthews

IPC分类号： F01T1166

CPC分类号： G01T1/1648

摘要： A radiation detector includes slit collimator. A radiation detector receives radiation which has been received in each of the slits. The aspect ratio of the detector is approximately three, and each semiconductor radiation detector has a transverse dimension which is less than that of its respective slit. A reconstruction processor generates an image indicative of the radiation received by the detectors. The detector may be rotated about a fixed axis. Alternately, the detector may be translated in coordination with its rotation to provide a substantially square field of view.

摘要翻译： 辐射检测器包括狭缝准直仪。 辐射检测器接收已经接收在每个狭缝中的辐射。 检测器的纵横比约为三个，每个半导体辐射检测器的横向尺寸小于其相应狭缝的横向尺寸。 重建处理器产生指示由检测器接收的辐射的图像。 检测器可以围绕固定轴线旋转。 或者，检测器可以与其旋转协调地平移以提供基本上正方形的视场。

公开(公告)号：US06211523B1

公开(公告)日：2001-04-03

申请号：US09090128

申请日：1998-06-03

申请人： Daniel Gagnon

发明人： Daniel Gagnon

IPC分类号： G01T1166

CPC分类号： G01T1/1648 ,  A61B6/037 ,  A61B6/4258 ,  G01T1/2985

摘要： A nuclear medicine gamma camera for diagnostic imaging includes a rotating gantry (16) which defines a subject receiving aperture (18). A support (10) supports a subject (12) being examined within the subject receiving aperture (18). A plurality of detector heads (20a-c) is movably attached to the rotating gantry (16). The detector heads (20a-c) are rotated about the subject (12) with the rotation of the rotating gantry (16). A plurality of radiation sources (30a-c) are mounted to the detector heads (20a-c) such that transmission radiation (32a-c) from the radiation sources (30a-c) is directed toward and received by corresponding detector heads (20a-c) positioned across the subject receiving aperture (18) from the radiation sources (30a-c). Translation means (22a-c) independently translates the detector heads (20a-c) laterally in directions tangential to the subject receiving aperture (18). A contouring device (40) runs a contouring operation wherein the translation means (22a-c) translates the detector heads (20a-c) laterally, and the contouring device (40) measures outer boundaries of the subject (12) in response to the transmission radiation (32a-c) received by the detector heads (20a-c).

摘要翻译： 用于诊断成像的核医学伽马照相机包括限定被摄体接收孔（18）的旋转台架（16）。 支撑件（10）支撑在对象接收孔径（18）内被检查的对象（12）。 多个检测器头（20a-c）可移动地附接到旋转机架（16）。 检测器头（20a-c）随着旋转机架（16）的旋转围绕被检体（12）旋转。 多个辐射源（30a-c）被安装到检测器头（20a-c）上，使得来自辐射源（30a-c）的传输辐射（32a-c）指向并由相应的检测器头（20a -c）从辐射源（30a-c）定位在对象接收孔（18）周围。 翻转装置（22a-c）在与被检体接收孔（18）相切的方向上横向地独立地翻转检测器头（20a-c）。 轮廓设备（40）运行轮廓加工操作，其中平移装置（22a-c）横向地平移检测器头部（20a-c），并且轮廓装置（40）响应于 由传感器头（20a-c）接收的传输辐射（32a-c）。

公开(公告)号：US06201247B1

公开(公告)日：2001-03-13

申请号：US09053938

申请日：1998-04-02

申请人： Bruce E. Lutheran ,  Frank P. DiFilippo ,  Daniel Gagnon

发明人： Bruce E. Lutheran ,  Frank P. DiFilippo ,  Daniel Gagnon

IPC分类号： G01T1166

CPC分类号： G01T1/1642 ,  A61B6/037 ,  G01T1/1648

摘要： A transmission radiation source assembly suitable for use in both SPECT and PET imaging includes a line source assembly having a medium energy transmission source. The line source assembly includes a primary collimator rotatably disposed about the medium energy transmission source. The primary collimator includes one or more beam limiting slots for shaping the width of a transmission beam emitted from the line source. An on/off collimator is rotatably disposed about the primary collimator and serves to control the on/off state of the line source. The on/off collimator includes a beam exit slot which, when aligned with one of the beam limiting slots allows the transmission beam to exit the line source. In order to sweep the transmission beam across an opposing detector head, the primary collimator and on/off collimator are synchronously rotated about an axis of rotation of the line source with the on/off collimator in the “on” position. In order to reduce the possibility of over saturating an opposing detector head with radiation from the line source, the rate at which the primary collimator and on/off collimator are rotated is such that the transmission beam spends greater time in regions of the examination region having high attenuation characteristics and shorter time in regions having low attenuation characteristics.

摘要翻译： 适用于SPECT和PET成像的透射辐射源组件包括具有中等能量传输源的线源组件。 线源组件包括围绕中等能量传输源可旋转地设置的主准直器。 主准直器包括一个或多个光束限制槽，用于对从线源发射的透射束的宽度进行整形。 开/关准直仪围绕主准直器可旋转地设置，用于控制线源的开/关状态。 开/关准直仪包括光束出射槽，当与光束限制狭槽之一对准时，光束出射槽允许透射束离开线源。 为了扫过传输光束穿过相对的检测器头，主准直器和开/关准直仪围绕线源的旋转轴线与开/关准直仪处于“开”位置同步旋转。 为了减少使用来自线源的辐射使对置的检测器头过度饱和的可能性，主准直器和开/关准直仪旋转的速率使得传输束在具有检测区域的区域中花费更长的时间 具有低衰减特性的区域的高衰减特性和较短的时间。

公开(公告)号：US06177675B1

公开(公告)日：2001-01-23

申请号：US09064458

申请日：1998-04-22

申请人： Daniel Gagnon ,  Stephen D. Miller ,  William G. Hawkins

发明人： Daniel Gagnon ,  Stephen D. Miller ,  William G. Hawkins

IPC分类号： G01T1166

CPC分类号： G01T1/1647

摘要： A gamma camera system includes a rotatable gantry supporting multiple detector heads each capable of receiving radiation from a region of interest of a subject disposed in an examination region. Each of the detector heads include a collimator which substantially defines the resolution and sensitivity of the respective detector head. At least two of the detector heads include collimators providing different resolution. Preferably, one of the collimators provides a detector head with substantially high resolution and another provides a detector head with substantially high sensitivity. An operator selectively combines image data detected by each of the multiple detector heads. If desired, the operator combine the image data from the multiple detector heads in a variety of manners to obtain images of various resolution and sensitivity from a single imaging procedure. The operator may also selectively weight the contribution that the image data from each of the detector heads has in the overall image. As yet another option, the operator may choose to combine only a high energy portion of the image data so as to minimize the amount of scatter events which are included in a final image.

摘要翻译： 伽马照相机系统包括可旋转机架，其支撑多个检测器头，每个检测器能够接收来自设置在检查区域中的对象的感兴趣区域的辐射。 每个检测器头包括基本上限定相应检测器头的分辨率和灵敏度的准直器。 至少两个检测器头包括提供不同分辨率的准直仪。 优选地，准直仪之一提供具有基本上高分辨率的检测器头，并且另一个提供具有基本上高灵敏度的检测器头。 操作者选择性地组合由多个检测器头中的每一个检测的图像数据。 如果需要，操作员以各种方式组合来自多个探测器头的图像数据，以从单个成像过程获得各种分辨率和灵敏度的图像。 操作者还可以选择性地加权来自每个检测器头部的图像数据对整个图像的贡献。 作为另一选择，操作者可以选择仅组合图像数据的高能量部分，以便最小化包括在最终图像中的散射事件的量。