会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 13. 发明申请
    • Toner transfer technique
    • 调色剂转印技术
    • US20050244179A1
    • 2005-11-03
    • US11042935
    • 2005-01-25
    • David RakovGraham WrightFrank Shuster
    • David RakovGraham WrightFrank Shuster
    • G03G15/00G03G15/16
    • G03G15/1675G03G15/5037G03G15/5058G03G2215/00033
    • A module, included in an electrophotographic printer, for making toner images by a method in which transfer current for electrostatic transfer of toner images to receiver members is adjusted to compensate for ambient variations of toner charge-to-mass ratio (q/m). A predetermined functional relationship between transfer current and a control voltage parameter is utilized. Magnitudes of the control voltage parameter are derived from voltage measurements relating to creation of toner control patches on a photoconductive image-recording member included in a modular electrophotographic printer. Control voltage magnitude is linearly dependent on q/m. The functional relationship, which is characterized by three experimentally determined parameters, is co-optimized for providing efficient transfer of toner images and for minimizing back-transfer of toner away from a receiver member in a transfer station included in the module.
    • 包括在电子照相打印机中的模块,用于通过调节调色剂图像到接收器构件的静电转印的转印电流来调节调色剂电荷质量比(q / m)的环境变化的方法制备调色剂图像。 利用转移电流与控制电压参数之间的预定功能关系。 控制电压参数的幅度来源于与包含在模块化电子照相打印机中的感光图像记录元件上产生调色剂控制贴片有关的电压测量。 控制电压幅度取决于q / m。 以三个实验确定的参数为特征的功能关系被共同优化,以提供调色剂图像的有效转印和最小化调色剂远离包含在模块中的转印站中的接收器构件的反向转印。
    • 15. 发明授权
    • Method and apparatus for tracking motion in MR images
    • 用于跟踪MR图像中运动的方法和装置
    • US06292683B1
    • 2001-09-18
    • US09313910
    • 1999-05-18
    • Sandeep Narendra GuptaMarshall SussmanGraham Wright
    • Sandeep Narendra GuptaMarshall SussmanGraham Wright
    • A61B5055
    • G06T3/0075A61B5/055
    • The present invention relates to magnetic resonance imaging (MRI) and includes a method and apparatus to track motion of anatomy or medical instruments, for example, between MR images. The invention includes acquiring a time series of MR images of a region of interest, where the region of interest contains the anatomy or structure that is prone to movement, and the MR images contain signal intensity variations. The invention includes identifying a local reference region in the region of interest of a reference image and acquired from the time series. The local reference region of the reference image is compared to that of the other MR images and a translational displacement is determined between the local reference region of the reference image and of another MR image. The translational displacement has signal intensity invariance and can accurately track anatomy motion or the movement of a medical instrument during an invasive procedure. The translational displacement can be used to align the images for automatic registration, such as in myocardial perfusion imaging, MR angiography, fMRI, or in any other procedure in which motion tracking is advantageous. Two implementations of the invention are disclosed, one in which a correlation coefficient is calculated and used to determine the translational displacement, and one in which the images are converted to a binary image by thresholding and after computation of a filtered cross-correlation, a signal peak is located and plotted as the translational displacement.
    • 本发明涉及磁共振成像(MRI),并且包括用于跟踪例如在MR图像之间的解剖或医疗器械的运动的方法和装置。 本发明包括获取感兴趣区域的MR图像的时间序列,其中感兴趣区域包含易于移动的解剖结构或结构,并且MR图像包含信号强度变化。 本发明包括识别参考图像的感兴趣区域并从时间序列中获取的局部参考区域。 将参考图像的局部参考区域与其他MR图像的局部参考区域进行比较,并且在参考图像的局部参考区域和另一MR图像之间确定平移位移。 平移位移具有信号强度不变性,可以在侵入性过程中精确跟踪解剖运动或医疗器械的运动。 平移位移可以用于对准用于自动对准的图像,例如在心肌灌注成像,MR血管造影术,fMRI或其中运动跟踪是有利的任何其他过程中。 公开了本发明的两个实施例,其中计算相关系数并用于确定平移位移,并且其中图像通过阈值处理和在滤波的互相关的计算之后被转换成二进制图像,其中信号 峰位于并绘制为平移位移。
    • 20. 发明申请
    • Motion compensation for magnetic resonance imaging
    • 磁共振成像运动补偿
    • US20060244445A1
    • 2006-11-02
    • US11115308
    • 2005-04-27
    • Marshall SussmanNaeem MerchantGraham WrightLawrence White
    • Marshall SussmanNaeem MerchantGraham WrightLawrence White
    • G01V3/00
    • G01R33/565G01R33/56391G01R33/5676
    • An MRI system and method for acquiring motion-compensated MR image data of an object. The MRI system includes an MRI device for generating a uniform magnetic field through the object, magnetic field gradients for imaging a portion of the object and an RF excitation field for evoking NMR response signals from the object; a computer for controlling the operation of the MRI system; a motion compensation module for generating a plurality of navigator waveforms for evoking a corresponding plurality of navigator echoes from the portion of the object while the object is being imaged, and processing the plurality of navigator echoes by determining a subset of similar navigator echoes and removing rigid-body translation from the NMR response signals associated with the subset of similar navigator echoes; and, interface circuitry for generating the magnetic gradient, RF and navigator waveforms and sampling the NMR response signals and the plurality of navigator echoes.
    • 用于获取物体的运动补偿MR图像数据的MRI系统和方法。 MRI系统包括用于通过物体产生均匀磁场的MRI装置,用于对物体的一部分进行成像的磁场梯度和用于从物体引起NMR响应信号的RF激励场; 用于控制MRI系统的操作的计算机; 一种运动补偿模块,用于产生多个导航波形,用于在对象被成像时从对象的该部分引起相应的多个导航回波,以及通过确定类似的导航回波的子集并去除刚性来处理多个导航回波 从与类似导航回波的子集相关联的NMR响应信号中翻译; 以及用于产生磁梯度的接口电路,RF和导航波形以及对NMR响应信号和多个导航回波的采样。