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    • 4. 发明授权
    • Quantification of medical image data
    • 医学图像数据的量化
    • US08811708B2
    • 2014-08-19
    • US13263764
    • 2010-04-12
    • Alexander FischerUma Satya RanjanUtpal Kumar
    • Alexander FischerUma Satya RanjanUtpal Kumar
    • G06K9/00G06K9/32G06T3/00G06T7/00
    • G06T7/0012G06T7/30G06T2207/10072G06T2207/20104G06T2207/30004
    • A system is provided for quantification of medical image data. First image obtaining means (1) are for obtaining a first image (A). Second image obtaining means (2) are for obtaining a second image (B). Spatial transformation obtaining means (3) are for obtaining spatial transformation information representing a correspondence between points in the first image and corresponding points in the second image. Identifying means (4) are for identifying a first image region (C) in the first image (A). Transforming means (5) are for transforming the first image region (C) into a corresponding second image region C′) in the second image (B) based on the spatial transformation information. Quantification means (6) are for computing a quantification relating to the second image region (C′) by accessing image values of the second image (B) within the second image region (C′).
    • 提供用于定量医学图像数据的系统。 第一图像获取装置(1)用于获得第一图像(A)。 第二图像获取装置(2)用于获得第二图像(B)。 空间变换获取装置(3)用于获得表示第一图像中的点与第二图像中的对应点之间的对应关系的空间变换信息。 识别装置(4)用于识别第一图像(A)中的第一图像区域(C)。 变换装置(5)用于基于空间变换信息将第一图像区域(C)变换为第二图像(B)中的对应的第二图像区域C'。 量化装置(6)用于通过访问第二图像区域(C')内的第二图像(B)的图像值来计算与第二图像区域(C')有关的量化。
    • 8. 发明申请
    • Automatic Input Function Estimation For Pharmacokinetic Modeling
    • 药代动力学建模的自动输入函数估计
    • US20080183447A1
    • 2008-07-31
    • US11995829
    • 2006-07-11
    • Alexander FischerTimo Paulus
    • Alexander FischerTimo Paulus
    • G06N3/00G06F17/10G06G7/58
    • G06F17/18G16H50/50
    • This system (200), apparatus (300), and method (100) of the present invention provide an analytic way to solve the (input) estimation problem of pharmacokinetic modeling: estimating parameters of a kinetic model from a series of tracer (radioactively labeled imaging agent) activity measurements (e.g. by positron emission tomography). Since the model describes a biological process its parameters have a direct functional interpretation (e.g. hypoxia for the tracer FMISO) that can be of diagnostic value. The measurements represent the activity distribution in time and space in the form of a 4D data set d(t, x, y, z), t=1, . . . , T. The kinetic parameter estimation procedure (205) requires knowledge of the tracer input activity. This input activity can either be measured invasively or it can be estimated from the data in a preprocessing step. The estimation problem can be solved efficiently if the model and its input are described analytically. Typically parameterized functions (often sums of exponential terms) (204) are fitted to the averaged data over a region of interest (ROI) (e.g. an artery or the left ventricular blood pool) in order to obtain an analytical input representation. The input function representation (functional form) (204) and its initial parameter values (205) have to be selected/specified prior to the fitting procedure 206). The present invention thereby reduces the amount of manual interaction and operator dependence in the evaluation of dynamic procedures.
    • 本发明的系统(200),装置(300)和方法(100)提供了解决药代动力学模型的(输入)估计问题的分析方法:从一系列示踪剂(放射性标记)估计动力学模型的参数 成像剂)活性测量(例如通过正电子发射断层摄影)。 由于该模型描述了生物过程,其参数具有可以具有诊断价值的直接功能解释(例如示踪剂FMISO的缺氧)。 测量以4D数据集d(t,x,y,z),t = 1,...的形式表示时间和空间中的活动分布。 。 。 动力学参数估计程序(205)需要了解示踪者输入活动的知识。 该输入活动可以被入侵测量,也可以从预处理步骤中的数据估计。 如果模型及其输入被分析地描述,则可以有效地解决估计问题。 通常,参数化函数(通常指数项的和)(204)适合于感兴趣区域(ROI)(例如动脉或左心室血池)上的平均数据,以便获得分析输入表示。 必须在拟合程序206之前选择/指定输入功能表示(功能形式)(204)及其初始参数值(205)。 因此,本发明减少了在动态过程评估中手动交互和操作者依赖的量。
    • 9. 发明授权
    • Method and apparatus for uphill casting with a slide valve closure placed on the casting table
    • 用于上坡铸造的方法和装置,其具有放置在铸造台上的滑阀闭合
    • US06929052B2
    • 2005-08-16
    • US10312938
    • 2001-07-07
    • Alexander FischerWolfgang Müller
    • Alexander FischerWolfgang Müller
    • B22D18/04B22D41/24
    • B22D41/24B22D18/04
    • A method for uphill casting/low-pressure casting, especially of light metal alloys, with a casting furnace lying below a casting table, having a riser pipe and a mouth opening of the riser pipe and having a mould with an underlying pouring-in opening and having a slide valve closure, forming a flow-through channel which for casting takes on a substantially straight, longitudinal course, wherein for shut-off in the slide valve closure, two opening sections of the flow-through channel directly adjacent one to the other are displaced with respect to one another transversely to the longitudinal course of the flow-through channel directly after casting with still liquid melt in the pouring-in opening, so that an overlying opening section remains in open communication with the pouring-in opening free from undercut and an underlying opening section remains in open communication with the mouth opening of the riser pipe, wherein the opening sections are completely offset with respect to each other.
    • 一种用于上浇铸/低压铸造,特别是轻金属合金的方法,其具有位于铸造台下方的铸造炉,具有提升管和提升管的开口,并具有具有下面的入口的模具 并且具有滑阀闭合件,形成用于铸造的流通通道基本上是直的纵向过程,其中为了在滑阀闭合件中切断,流动通道的两个开口部分直接邻近于 另一个在浇注入口中的静止液体熔体之后直接相对于另一个横向相对于流通通道的纵向进行位移,使得上部开口部分保持与入口开口自由开放连通 从底切和下面的开口部分保持与提升管的开口开放连通,其中开口部分相对于每个ot完全偏移 她