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43 条记录 (耗时 0.021 秒)

    Systems and methods for analyzing an abnormality of an object
    1.
    发明申请
    Systems and methods for analyzing an abnormality of an object 有权
    用于分析物体异常的系统和方法

    公开(公告)号：US20050004452A1

    公开(公告)日：2005-01-06

    申请号：US10611296

    申请日：2003-07-01

    申请人： Sarah Hertel ,  Stanley Fox ,  Alexander Ganin ,  Charles Stearns

    发明人： Sarah Hertel ,  Stanley Fox ,  Alexander Ganin ,  Charles Stearns

    IPC分类号： G01T1/161 ,  A61B6/03 ,  G06T1/00 ,  G06T7/00 ,  A61B5/05

    CPC分类号： G06T7/0012 ,  A61B6/032 ,  A61B6/037 ,  A61B6/5235 ,  G06T7/30

    摘要： In one embodiment, a method for analyzing at least one abnormality of an object is described. The method includes obtaining a first image containing an abnormality using a first modality, obtaining a second image containing the abnormality using-a second modality, selecting a first region of interest located within the first image, determining an anatomical size of the abnormality based on the first region of interest in the first image, and determining a relative metabolic activity based on a second region of interest within the second image.

    摘要翻译： 在一个实施例中，描述了用于分析对象的至少一个异常的方法。 该方法包括使用第一模式获得包含异常的第一图像，使用第二模式获得包含异常的第二图像，选择位于第一图像内的第一感兴趣区域，基于该方法确定异常的解剖尺寸 第一图像中的第一感兴趣区域，以及基于第二图像内的第二感兴趣区域确定相对代谢活动。

    Method and apparatus for timing calibration in a PET scanner
    4.
    发明申请
    Method and apparatus for timing calibration in a PET scanner 失效

    公开(公告)号：US20060102845A1

    公开(公告)日：2006-05-18

    申请号：US10986792

    申请日：2004-11-15

    申请人： John Williams ,  Charles Stearns ,  David McDaniel ,  Alexander Ganin

    发明人： John Williams ,  Charles Stearns ,  David McDaniel ,  Alexander Ganin

    IPC分类号： G01T1/164

    CPC分类号： G01T1/172 ,  G01T1/2985

    摘要： The invention is directed to a method and apparatus for timing calibration in a PET scanner. According to one embodiment, the invention relates to a method for timing calibration in a PET scanner having a plurality of scintillator blocks. The method comprises: detecting, in a first scintillator block, a first radiation event, wherein the first scintillator block time-stamps the first radiation event; detecting, in a second scintillator block that is adjacent to the first scintillator block, a second radiation event that corresponds to the first radiation event, wherein the second scintillator block time-stamps the second radiation event; and determining a timing characteristic of the first scintillator block with respect to the second scintillator block based on a comparison between the time-stamps of the first radiation event and the second radiation event.

    Multi-plane acquisition in digital x-ray radiography
    7.
    发明授权
    Multi-plane acquisition in digital x-ray radiography 有权
    在数字X射线摄影中进行多平面采集

    公开(公告)号：US06914958B2

    公开(公告)日：2005-07-05

    申请号：US09682001

    申请日：2001-07-06

    申请人： Alexander Ganin

    发明人： Alexander Ganin

    IPC分类号： A61B6/03 ,  A61B6/04 ,  H05G1/60

    CPC分类号： A61B6/0457 ,  A61B6/032 ,  A61B6/469 ,  A61B6/488 ,  G06F19/00

    摘要： A method is provided for acquiring digital x-ray images. Scan parameters designating slices of interest from a patient anatomy are identified. The travel distance and the speed of the x-ray tube and the detector are determined from the scan parameters. The patient is scanned in a first direction to obtain a first x-ray image utilizing a servo-tomo function based on the scan parameters. The image is saved in an image storage device and is displayed. The patient is scanned in a second direction to obtain a second x-ray image utilizing the servo-tomo function based on the scan parameters. The image is saved and displayed simultaneously with the first image in a multi-image format. After each scan, the operator may modify the scan parameters designating a slice of interest before initiating the next scan.

    摘要翻译： 提供了一种用于获取数字X射线图像的方法。 识别从患者解剖结构指定感兴趣切片的扫描参数。 从扫描参数确定X射线管和检测器的移动距离和速度。 以第一方向扫描患者，以基于扫描参数获得利用伺服断层功能的第一x射线图像。 图像保存在图像存储设备中并显示。 基于扫描参数，利用伺服断层功能，沿第二方向扫描患者以获得第二X射线图像。 图像以多图像格式与第一个图像同时保存和显示。 在每次扫描之后，操作员可以在开始下一次扫描之前修改指定感兴趣的切片的扫描参数。

    Correction for gradient amplifier hysteresis in acquired MRI data
    8.
    发明授权
    Correction for gradient amplifier hysteresis in acquired MRI data 有权
    获取MRI数据中梯度放大器迟滞的校正

    公开(公告)号：US06291997B1

    公开(公告)日：2001-09-18

    申请号：US09452440

    申请日：1999-12-02

    申请人： Kevin F. King ,  Alexander Ganin ,  Neville D. Gai

    发明人： Kevin F. King ,  Alexander Ganin ,  Neville D. Gai

    IPC分类号： G01V300

    CPC分类号： G01R33/56518 ,  G01R33/3852

    摘要： Image artifacts produced by residual magnetization in elements of the gradient field amplifier system are reduced by driving the residual magnetization to a preselected value at the end of each imaging pulse sequence. Reset gradient pulses are produced by the gradient field amplifier system after each signal is acquired to drive the residual magnetization to a selected value. A number of different reset gradient waveforms may be used, and they may be produced in a number of different ways.

    摘要翻译： 通过在每个成像脉冲序列结束时将残余磁化驱动到预选值，减少梯度场放大器系统的元件中由残余磁化产生的图像伪影。 在获取每个信号之后，由梯度场放大器系统产生复位梯度脉冲以将剩余磁化驱动到所选择的值。 可以使用多个不同的复位梯度波形，并且它们可以以多种不同的方式产生。