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    • 1. 发明申请
    • A METHOD FOR DELINEATING AN ABLATION LESION
    • 一种消除疝气的方法
    • WO2003099116A1
    • 2003-12-04
    • PCT/US2002/034797
    • 2002-10-31
    • CASE WESTERN RESERVE UNIVERSITYLAZEBNIK, Roee, S.WILSON, David, L.LEWIN, Jonathan, S.
    • LAZEBNIK, Roee, S.WILSON, David, L.LEWIN, Jonathan, S.
    • A61B5/05
    • G06T7/0012G06T7/12G06T7/149G06T2207/10088G06T2207/20116G06T2207/30096
    • A method for delineating an ablation lesion (10) having concentric inner (12) and outer (14) lesion regions using magnetic resonance (MR) information is provided. The method includes providing a deformable model having parameters defining concentric inner and outer ellipsoid surfaces, generating boundaries from the MR information, and fitting the model parameters to the boundaries so that the model delineates the inner (11) and outer (14) lesion regions. The lesion boundaries can be generated by manually segmenting the lesion using the MR information. The lesion boundaries can also be generated by automatically segmenting the lesion using the MR information. The lesion boundaries can also be generated by automatically segmenting the lesion using the MR information. The fitting step can include minimizing an objective function f(Ø) defining the sum of squared distances di in (Ø in ) and dj out (Ø out ) from boundary surface points to the ellipsoid surfaces defined by the model parameters. Alternatively, the fitting step can include minimizing an objective function E(Ø) accounting for model position with respect to MR imaging grayscale edges.
    • 提供了使用磁共振(MR)信息描绘具有同心的内部(12)和外部(14)损伤区域的消融损伤(10)的方法。 该方法包括提供具有定义同心的内椭圆表面的参数的可变形模型,从MR信息生成边界,以及将模型参数拟合到边界,使得模型描绘内部(11)和外部(14)损伤区域。 可以通过使用MR信息手动分割病变来产生损伤边界。 也可以通过使用MR信息自动分割病变来产生损伤边界。 也可以通过使用MR信息自动分割病变来产生损伤边界。 拟合步骤可以包括最小化定义从模型参数限定的边界表面点到椭圆表面的平方距离di(inin)和dj(out)(Øout)之和的目标函数f(Ø)。 或者,拟合步骤可以包括最小化与MR成像灰度边缘相关的模型位置的目标函数E(Ø)。