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    • 2. 发明授权
    • Real-time two-dimensional resistance and pulsatility mapping
    • 实时二维电阻和脉动映射
    • US6023968A
    • 2000-02-15
    • US561887
    • 1995-11-22
    • Ray Steven SprattGregory Sharat LinSteven F. Forestieri
    • Ray Steven SprattGregory Sharat LinSteven F. Forestieri
    • G01F1/66G01S15/89G01F1/68
    • G01F1/663G01S15/8979
    • A method and apparatus for determining resistance and pulsatility indices of a flow of material, such as the flow of blood in the human body. This may be implemented, for example, in a color flow module in an ultrasonic imaging system for display of the pulsatility or resistance index in two dimensions and in different colors to allow discrimination between veins and arteries and detection of pathologic elevation of vascular resistance in a clinical survey mode of the system. The resistance index is determined from the ratio of a unipolar variation estimate of a velocity of the flow material divided by a peak velocity. The variation estimate may be one of the following: a difference between a peak velocity of the flow of material and a second minimum (if unipolar) or negative (if bipolar) velocity of the flow of material, a standard deviation .rho. of the velocity of the flow of material, a square root of a value at a first peak of an autocorrelator of the velocity of the flow of material, and a square root of a value at a second peak of the autocorrelator of the velocity of the flow of material.
    • 一种用于确定材料流动的阻力和脉动指数的方法和装置,例如人体中血液的流动。 这可以例如在超声成像系统中的彩色流模块中实现,用于在二维和不同颜色中显示脉搏或阻力指数,以允许在静脉和动脉之间进行区分并检测血管阻力的病理升高 系统临床调查模式。 电阻指数由流动材料的速度的单极性变化估计除以峰值速度的比率确定。 变化估计可以是以下之一:材料流动的峰值速度与材料流动的第二最小值(如果是单极性)或负极(如果是双极性)速度之间的差异,则速度的标准偏差rho 材料的流动,材料流动速度的自相关器的第一峰值处的值的平方根,以及材料流动速度的自相关器的第二峰值处的值的平方根。
    • 8. 发明申请
    • ARRAY OF PROGRESSIVE OPHTHALMIC LENS ELEMENTS
    • 渐进眼镜镜片元件阵列
    • US20090290125A1
    • 2009-11-26
    • US11913575
    • 2006-05-05
    • Saulius Raymond VarnasRay Steven Spratt
    • Saulius Raymond VarnasRay Steven Spratt
    • G02C7/06A61B3/00
    • G02C7/063G02C7/024G02C7/027G02C7/061G02C7/066G02C2202/08
    • An array of progressive ophthalmic lens elements is disclosed. The progressive ophthalmic elements contained in the array having substantially the same addition power and substantially the same optical prescription for distance vision. Each of the progressive ophthalmic lens elements has a progressive lens design characterised by a set of parameters defining a distance zone providing a refracting power for distance vision, a near zone providing a refracting power for near vision and a corridor having a refracting power varying from that of the distance zone to that of the near zone. The progressive ophthalmic lens elements provide, for a range of values or categories of at least two lifestyle and/or biometric parameters of lens wearers, different progressive lens designs in which at least two of the lens design parameters each have a respective value or characteristic attributable to, or associated with, a particular value or category of a respective one of the lifestyle and/or biometric parameters.
    • 公开了一系列渐进式眼科镜片元件。 包含在阵列中的渐进眼科元件具有基本相同的附加功率和用于远视的基本相同的光学处方。 每个渐进式眼科镜片元件具有渐进式镜片设计,其特征在于一组参数,其定义了提供距离视力的折射力的距离区域,为近视力提供折射力的近区域和具有与之相似的折射力的走廊 的距离区域与近区域的距离。 渐进式眼科镜片元件为透镜佩戴者的至少两种生活方式和/或生物特征参数的一系列值或类别提供不同的渐进透镜设计,其中透镜设计参数中的至少两个具有相应的值或特性可归因于 到或与其相关联的生物体和/或生物特征参数中的相应一个的特定值或类别。